Vendor Update Go Libs (#13444)

* denisenkom/go-mssqldb untagged -> v0.9.0

* github.com/editorconfig/editorconfig-core-go v2.3.7 -> v2.3.8

* github.com/go-testfixtures/testfixtures v3.4.0 -> v3.4.1

* github.com/mholt/archiver v3.3.2 -> v3.5.0

* github.com/olivere/elastic v7.0.20 -> v7.0.21

* github.com/urfave/cli v1.22.4 -> v1.22.5

* github.com/xanzy/go-gitlab v0.38.1 -> v0.39.0

* github.com/yuin/goldmark-meta untagged -> v1.0.0

* github.com/ethantkoenig/rupture 0a76f03a811a -> c3b3b810dc77

* github.com/jaytaylor/html2text 8fb95d837f7d -> 3577fbdbcff7

* github.com/kballard/go-shellquote cd60e84ee657 -> 95032a82bc51

* github.com/msteinert/pam 02ccfbfaf0cc -> 913b8f8cdf8b

* github.com/unknwon/paginater 7748a72e0141 -> 042474bd0eae

* CI.restart()

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

go.mod

@@ -18,21 +18,22 @@ require (
 	gitea.com/macaron/session v0.0.0-20201103015045-a177a2701dee
 	gitea.com/macaron/toolbox v0.0.0-20190822013122-05ff0fc766b7
 	github.com/PuerkitoBio/goquery v1.5.1
-	github.com/RoaringBitmap/roaring v0.5.1 // indirect
+	github.com/RoaringBitmap/roaring v0.5.5 // indirect
 	github.com/alecthomas/chroma v0.8.1
 	github.com/andybalholm/brotli v1.0.1 // indirect
 	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
 	github.com/blevesearch/bleve v1.0.12
+	github.com/cpuguy83/go-md2man/v2 v2.0.0 // indirect
 	github.com/cznic/b v0.0.0-20181122101859-a26611c4d92d // indirect
 	github.com/cznic/mathutil v0.0.0-20181122101859-297441e03548 // indirect
 	github.com/cznic/strutil v0.0.0-20181122101858-275e90344537 // indirect
-	github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc
+	github.com/denisenkom/go-mssqldb v0.9.0
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
 	github.com/dlclark/regexp2 v1.4.0 // indirect
 	github.com/dustin/go-humanize v1.0.0
-	github.com/editorconfig/editorconfig-core-go/v2 v2.3.7
+	github.com/editorconfig/editorconfig-core-go/v2 v2.3.8
 	github.com/emirpasic/gods v1.12.0
-	github.com/ethantkoenig/rupture v0.0.0-20180203182544-0a76f03a811a
+	github.com/ethantkoenig/rupture v0.0.0-20181029165146-c3b3b810dc77
 	github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51 // indirect
 	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
 	github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870 // indirect
@@ -45,22 +46,22 @@ require (
 	github.com/go-redis/redis/v7 v7.4.0
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/go-swagger/go-swagger v0.25.0
-	github.com/go-testfixtures/testfixtures/v3 v3.4.0
+	github.com/go-testfixtures/testfixtures/v3 v3.4.1
 	github.com/gobwas/glob v0.2.3
 	github.com/gogs/chardet v0.0.0-20191104214054-4b6791f73a28
 	github.com/gogs/cron v0.0.0-20171120032916-9f6c956d3e14
 	github.com/google/go-github/v32 v32.1.0
 	github.com/google/uuid v1.1.2
 	github.com/gorilla/context v1.1.1
-	github.com/hashicorp/go-retryablehttp v0.6.7 // indirect
+	github.com/hashicorp/go-retryablehttp v0.6.8 // indirect
 	github.com/hashicorp/go-version v1.2.1
 	github.com/huandu/xstrings v1.3.2
 	github.com/imdario/mergo v0.3.11 // indirect
 	github.com/issue9/assert v1.3.2 // indirect
 	github.com/issue9/identicon v1.0.1
-	github.com/jaytaylor/html2text v0.0.0-20160923191438-8fb95d837f7d
+	github.com/jaytaylor/html2text v0.0.0-20200412013138-3577fbdbcff7
 	github.com/jmhodges/levigo v1.0.0 // indirect
-	github.com/kballard/go-shellquote v0.0.0-20170619183022-cd60e84ee657
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51
 	github.com/keybase/go-crypto v0.0.0-20200123153347-de78d2cb44f4
 	github.com/klauspost/compress v1.11.2
 	github.com/klauspost/pgzip v1.2.5 // indirect
@@ -68,21 +69,25 @@ require (
 	github.com/lib/pq v1.8.1-0.20200908161135-083382b7e6fc
 	github.com/lunny/dingtalk_webhook v0.0.0-20171025031554-e3534c89ef96
 	github.com/markbates/goth v1.65.0
+	github.com/mattn/go-colorable v0.1.7 // indirect
 	github.com/mattn/go-isatty v0.0.12
 	github.com/mattn/go-runewidth v0.0.9 // indirect
 	github.com/mattn/go-sqlite3 v1.14.4
 	github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81
 	github.com/mgechev/revive v1.0.3-0.20200921231451-246eac737dc7
-	github.com/mholt/archiver/v3 v3.3.2
+	github.com/mholt/archiver/v3 v3.5.0
 	github.com/microcosm-cc/bluemonday v1.0.4
 	github.com/minio/minio-go/v7 v7.0.5
 	github.com/mitchellh/go-homedir v1.1.0
-	github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc
+	github.com/msteinert/pam v0.0.0-20200810204841-913b8f8cdf8b
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	github.com/niklasfasching/go-org v1.3.2
 	github.com/oliamb/cutter v0.2.2
-	github.com/olivere/elastic/v7 v7.0.20
+	github.com/olivere/elastic/v7 v7.0.21
+	github.com/onsi/ginkgo v1.13.0 // indirect
 	github.com/pelletier/go-toml v1.8.1
+	github.com/philhofer/fwd v1.1.0 // indirect
+	github.com/pierrec/lz4/v4 v4.1.1 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/pquerna/otp v1.2.0
 	github.com/prometheus/client_golang v1.8.0
@@ -91,6 +96,8 @@ require (
 	github.com/sergi/go-diff v1.1.0
 	github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749 // indirect
 	github.com/shurcooL/vfsgen v0.0.0-20200824052919-0d455de96546
+	github.com/spf13/viper v1.7.1 // indirect
+	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/stretchr/testify v1.6.1
 	github.com/syndtr/goleveldb v1.0.0
 	github.com/tecbot/gorocksdb v0.0.0-20181010114359-8752a9433481 // indirect
@@ -99,20 +106,20 @@ require (
 	github.com/ulikunitz/xz v0.5.8 // indirect
 	github.com/unknwon/com v1.0.1
 	github.com/unknwon/i18n v0.0.0-20200823051745-09abd91c7f2c
-	github.com/unknwon/paginater v0.0.0-20151104151617-7748a72e0141
+	github.com/unknwon/paginater v0.0.0-20200328080006-042474bd0eae
-	github.com/urfave/cli v1.22.4
+	github.com/urfave/cli v1.22.5
 	github.com/willf/bitset v1.1.11 // indirect
-	github.com/xanzy/go-gitlab v0.38.1
+	github.com/xanzy/go-gitlab v0.39.0
 	github.com/yohcop/openid-go v1.0.0
 	github.com/yuin/goldmark v1.2.1
 	github.com/yuin/goldmark-highlighting v0.0.0-20200307114337-60d527fdb691
-	github.com/yuin/goldmark-meta v0.0.0-20191126180153-f0638e958b60
+	github.com/yuin/goldmark-meta v1.0.0
 	go.jolheiser.com/hcaptcha v0.0.4
 	go.jolheiser.com/pwn v0.0.3
 	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897
-	golang.org/x/net v0.0.0-20201010224723-4f7140c49acb
+	golang.org/x/net v0.0.0-20201031054903-ff519b6c9102
 	golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43
-	golang.org/x/sys v0.0.0-20201015000850-e3ed0017c211
+	golang.org/x/sys v0.0.0-20201106081118-db71ae66460a
 	golang.org/x/text v0.3.4
 	golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e // indirect
 	golang.org/x/tools v0.0.0-20200929161345-d7fc70abf50f

go.sum

@@ -35,7 +35,6 @@ cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0Zeo
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-code.cloudfoundry.org/bytefmt v0.0.0-20190710193110-1eb035ffe2b6/go.mod h1:wN/zk7mhREp/oviagqUXY3EwuHhWyOvAdsn5Y4CzOrc=
 code.gitea.io/gitea-vet v0.2.1 h1:b30by7+3SkmiftK0RjuXqFvZg2q4p68uoPGuxhzBN0s=
 code.gitea.io/gitea-vet v0.2.1/go.mod h1:zcNbT/aJEmivCAhfmkHOlT645KNOf9W2KnkLgFjGGfE=
 code.gitea.io/sdk/gitea v0.13.1 h1:Y7bpH2iO6Q0KhhMJfjP/LZ0AmiYITeRQlCD8b0oYqhk=
@@ -86,13 +85,10 @@ github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c/go.mod h1:chxPXzS
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/Djarvur/go-err113 v0.0.0-20200511133814-5174e21577d5/go.mod h1:4UJr5HIiMZrwgkSPdsjy2uOQExX/WEILpIrO9UPGuXs=
 github.com/GeertJohan/go.incremental v1.0.0/go.mod h1:6fAjUhbVuX1KcMD3c8TEgVUqmo4seqhv0i0kdATSkM0=
 github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtixis4Tib9if0=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
-github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/OpenPeeDeeP/depguard v1.0.1/go.mod h1:xsIw86fROiiwelg+jB2uM9PiKihMMmUx/1V+TNhjQvM=
 github.com/PuerkitoBio/goquery v1.5.1 h1:PSPBGne8NIUWw+/7vFBV+kG2J/5MOjbzc7154OaKCSE=
 github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
 github.com/PuerkitoBio/purell v1.1.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
@@ -102,11 +98,10 @@ github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 h1:d+Bc7a5rLufV
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/RoaringBitmap/roaring v0.4.23 h1:gpyfd12QohbqhFO4NVDUdoPOCXsyahYRQhINmlHxKeo=
 github.com/RoaringBitmap/roaring v0.4.23/go.mod h1:D0gp8kJQgE1A4LQ5wFLggQEyvDi06Mq5mKs52e1TwOo=
-github.com/RoaringBitmap/roaring v0.5.1 h1:ugdwntNygzk1FZnmtxUr+jM9AYrpU3I3zpt49npDWVo=
+github.com/RoaringBitmap/roaring v0.5.5 h1:naNqvO1mNnghk2UvcsqnzHDBn9DRbCIRy94GmDTRVTQ=
-github.com/RoaringBitmap/roaring v0.5.1/go.mod h1:D0gp8kJQgE1A4LQ5wFLggQEyvDi06Mq5mKs52e1TwOo=
+github.com/RoaringBitmap/roaring v0.5.5/go.mod h1:puNo5VdzwbaIQxSiDIwfXl4Hnc+fbovcX4IW/dSTtUk=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/Unknwon/com v0.0.0-20190321035513-0fed4efef755/go.mod h1:voKvFVpXBJxdIPeqjoJuLK+UVcRlo/JLjeToGxPYu68=
 github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
 github.com/afex/hystrix-go v0.0.0-20180502004556-fa1af6a1f4f5/go.mod h1:SkGFH1ia65gfNATL8TAiHDNxPzPdmEL5uirI2Uyuz6c=
@@ -189,7 +184,6 @@ github.com/blevesearch/zap/v14 v14.0.3 h1:ccEv296u6DEUHFF9U4W2E/6/WkbuDrS9/1VJM3
 github.com/blevesearch/zap/v14 v14.0.3/go.mod h1:oObAhcDHw7p1ahiTCqhRkdxdl7UA8qpvX10pSgrTMHc=
 github.com/blevesearch/zap/v15 v15.0.1 h1:jEism63eY+qdcvwXH0K8MiKhv5tb10T1k7SNx6fauCM=
 github.com/blevesearch/zap/v15 v15.0.1/go.mod h1:ho0frqAex2ktT9cYFAxQpoQXsxb/KEfdjpx4s49rf/M=
-github.com/bombsimon/wsl/v3 v3.1.0/go.mod h1:st10JtZYLE4D5sC7b8xV4zTKZwAQjCH/Hy2Pm1FNZIc=
 github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc h1:biVzkmvwrH8WK8raXaxBx6fRVTlJILwEwQGL1I/ByEI=
 github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668 h1:U/lr3Dgy4WK+hNk4tyD+nuGjpVLPEHuJSFXMw11/HPA=
@@ -254,18 +248,18 @@ github.com/cznic/mathutil v0.0.0-20181122101859-297441e03548/go.mod h1:e6NPNENfs
 github.com/cznic/strutil v0.0.0-20181122101858-275e90344537 h1:MZRmHqDBd0vxNwenEbKSQqRVT24d3C05ft8kduSwlqM=
 github.com/cznic/strutil v0.0.0-20181122101858-275e90344537/go.mod h1:AHHPPPXTw0h6pVabbcbyGRK1DckRn7r/STdZEeIDzZc=
 github.com/daaku/go.zipexe v1.0.0/go.mod h1:z8IiR6TsVLEYKwXAoE/I+8ys/sDkgTzSL0CLnGVd57E=
-github.com/daixiang0/gci v0.2.4/go.mod h1:+AV8KmHTGxxwp/pY84TLQfFKp2vuKXXJVzF3kD/hfR4=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 h1:y5HC9v93H5EPKqaS1UYVg1uYah5Xf51mBfIoWehClUQ=
 github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964/go.mod h1:Xd9hchkHSWYkEqJwUGisez3G1QY8Ryz0sdWrLPMGjLk=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/denis-tingajkin/go-header v0.3.1/go.mod h1:sq/2IxMhaZX+RRcgHfCRx/m0M5na0fBt4/CRe7Lrji0=
 github.com/denisenkom/go-mssqldb v0.0.0-20190707035753-2be1aa521ff4/go.mod h1:zAg7JM8CkOJ43xKXIj7eRO9kmWm/TW578qo+oDO6tuM=
 github.com/denisenkom/go-mssqldb v0.0.0-20190924004331-208c0a498538/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/denisenkom/go-mssqldb v0.0.0-20191128021309-1d7a30a10f73/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc h1:VRRKCwnzqk8QCaRC4os14xoKDdbHqqlJtJA0oc1ZAjg=
 github.com/denisenkom/go-mssqldb v0.0.0-20200428022330-06a60b6afbbc/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
+github.com/denisenkom/go-mssqldb v0.9.0 h1:RSohk2RsiZqLZ0zCjtfn3S4Gp4exhpBWHyQ7D0yGjAk=
+github.com/denisenkom/go-mssqldb v0.9.0/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible h1:7qlOGliEKZXTDg6OTjfoBKDXWrumCAMpl/TFQ4/5kLM=
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
 github.com/dgryski/go-sip13 v0.0.0-20181026042036-e10d5fee7954/go.mod h1:vAd38F8PWV+bWy6jNmig1y/TA+kYO4g3RSRF0IAv0no=
@@ -284,8 +278,8 @@ github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25Kn
 github.com/eapache/go-resiliency v1.1.0/go.mod h1:kFI+JgMyC7bLPUVY133qvEBtVayf5mFgVsvEsIPBvNs=
 github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1:+020luEh2TKB4/GOp8oxxtq0Daoen/Cii55CzbTV6DU=
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
-github.com/editorconfig/editorconfig-core-go/v2 v2.3.7 h1:e88U5ztaklGv7X0gHIgR/cCJmHkLyVAS8aOIoEPKJP0=
+github.com/editorconfig/editorconfig-core-go/v2 v2.3.8 h1:nq6QPrFjoI1QP9trhj+bsXoS8MSjhTgQXgTavA5zPbg=
-github.com/editorconfig/editorconfig-core-go/v2 v2.3.7/go.mod h1:NifC+uYhAGV/U2AxhZa3bNy4EdFMHz9mVU02vbGSMWQ=
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@@ -294,8 +288,7 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF
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@@ -313,9 +306,6 @@ github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8
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@@ -333,7 +323,6 @@ github.com/glycerine/goconvey v0.0.0-20190410193231-58a59202ab31 h1:gclg6gY70GLy
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@@ -357,7 +346,6 @@ github.com/go-ldap/ldap/v3 v3.2.4/go.mod h1:iYS1MdmrmceOJ1QOTnRXrIs7i3kloqtmGQjR
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@@ -439,19 +427,8 @@ github.com/go-swagger/go-swagger v0.25.0 h1:FxhyrWWV8V/A9P6GtI5szWordAdbb6Y0nqdY
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@@ -479,7 +456,6 @@ github.com/gobuffalo/packr/v2 v2.2.0/go.mod h1:CaAwI0GPIAv+5wKLtv8Afwl+Cm78K/I/V
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@@ -526,21 +502,6 @@ github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
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@@ -576,7 +537,6 @@ github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
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@@ -601,10 +561,7 @@ github.com/gorilla/sessions v1.1.1/go.mod h1:8KCfur6+4Mqcc6S0FEfKuN15Vl5MgXW92AE
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@@ -623,8 +580,8 @@ github.com/hashicorp/go-immutable-radix v1.0.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjh
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@@ -698,20 +655,15 @@ github.com/jackc/puddle v0.0.0-20190413234325-e4ced69a3a2b/go.mod h1:m4B5Dj62Y0f
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@@ -875,17 +817,15 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN
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@@ -1461,15 +1367,12 @@ golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190617190820-da514acc4774/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
-golang.org/x/tools v0.0.0-20190719005602-e377ae9d6386/go.mod h1:jcCCGcm9btYwXyDqrUWc6MKQKKGJCWEQ3AfLSRIbEuI=
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190823170909-c4a336ef6a2f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20190910044552-dd2b5c81c578/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191112195655-aa38f8e97acc/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191115202509-3a792d9c32b2/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -1481,7 +1384,6 @@ golang.org/x/tools v0.0.0-20191227053925-7b8e75db28f4/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200103221440-774c71fcf114/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200117161641-43d50277825c/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200117161641-43d50277825c/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/tools v0.0.0-20200117220505-0cba7a3a9ee9/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200122220014-bf1340f18c4a/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200204074204-1cc6d1ef6c74/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
@@ -1491,38 +1393,29 @@ golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200227222343-706bc42d1f0d/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
 golang.org/x/tools v0.0.0-20200312045724-11d5b4c81c7d/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
-golang.org/x/tools v0.0.0-20200321224714-0d839f3cf2ed/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
-golang.org/x/tools v0.0.0-20200324003944-a576cf524670/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200325010219-a49f79bcc224/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
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 golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
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-golang.org/x/tools v0.0.0-20200422022333-3d57cf2e726e/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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 golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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 golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/tools v0.0.0-20200618134242-20370b0cb4b2/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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 golang.org/x/tools v0.0.0-20200717024301-6ddee64345a6/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200717024301-6ddee64345a6/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
-golang.org/x/tools v0.0.0-20200724022722-7017fd6b1305/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200729194436-6467de6f59a7/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200804011535-6c149bb5ef0d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
-golang.org/x/tools v0.0.0-20200812195022-5ae4c3c160a0/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200825202427-b303f430e36d/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20200921210052-fa0125251cc4 h1:v8Jgq9X6Es9K9otVr9jxENEJigepKMZgA9OmrIZDtFA=
 golang.org/x/tools v0.0.0-20200921210052-fa0125251cc4/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/tools v0.0.0-20200928182047-19e03678916f/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20200929161345-d7fc70abf50f h1:18s2P7JILnVhIF2+ZtGJQ9czV5bvTsb13/UGtNPDbjA=
 golang.org/x/tools v0.0.0-20200929161345-d7fc70abf50f/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/xerrors v0.0.0-20190410155217-1f06c39b4373/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -1648,7 +1541,6 @@ gopkg.in/ini.v1 v1.46.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.57.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.60.1/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
-gopkg.in/ini.v1 v1.60.2/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
 gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
@@ -1678,11 +1570,6 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.0.1-2020.1.5/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-mvdan.cc/gofumpt v0.0.0-20200709182408-4fd085cb6d5f/go.mod h1:9VQ397fNXEnF84t90W4r4TRCQK+pg9f8ugVfyj+S26w=
-mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
-mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
-mvdan.cc/unparam v0.0.0-20190720180237-d51796306d8f/go.mod h1:4G1h5nDURzA3bwVMZIVpwbkw+04kSxk3rAtzlimaUJw=
 mvdan.cc/xurls/v2 v2.2.0 h1:NSZPykBXJFCetGZykLAxaL6SIpvbVy/UFEniIfHAa8A=
 mvdan.cc/xurls/v2 v2.2.0/go.mod h1:EV1RMtya9D6G5DMYPGD8zTQzaHet6Jh8gFlRgGRJeO8=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=

vendor/github.com/RoaringBitmap/roaring/.travis.yml

@@ -8,7 +8,6 @@ install:
 notifications:
   email: false
 go:
-- "1.12.x"
 - "1.13.x"
 - "1.14.x"
 - tip

vendor/github.com/RoaringBitmap/roaring/CONTRIBUTORS

@@ -13,4 +13,6 @@ Forud Ghafouri (@fzerorubigd),
 Joe Nall (@joenall),
 (@fredim),
 Edd Robinson (@e-dard),
-Alexander Petrov (@alldroll)
+Alexander Petrov (@alldroll),
+Guy Molinari (@guymolinari),
+Ling Jin (@JinLingChristopher)

vendor/github.com/RoaringBitmap/roaring/README.md

@@ -3,7 +3,6 @@ roaring [![Build Status](https://travis-ci.org/RoaringBitmap/roaring.png)](https
 ![Go-CI](https://github.com/RoaringBitmap/roaring/workflows/Go-CI/badge.svg)
 ![Go-ARM-CI](https://github.com/RoaringBitmap/roaring/workflows/Go-ARM-CI/badge.svg)
 ![Go-Windows-CI](https://github.com/RoaringBitmap/roaring/workflows/Go-Windows-CI/badge.svg)
-![Go-macos-CI](https://github.com/RoaringBitmap/roaring/workflows/Go-macos-CI/badge.svg)
 =============
 
 This is a go version of the Roaring bitmap data structure. 
@@ -56,6 +55,93 @@ This code is licensed under Apache License, Version 2.0 (ASL2.0).
 
 Copyright 2016-... by the authors.
 
+When should you use a bitmap?
+===================================
+
+
+Sets are a fundamental abstraction in
+software. They can be implemented in various
+ways, as hash sets, as trees, and so forth.
+In databases and search engines, sets are often an integral
+part of indexes. For example, we may need to maintain a set
+of all documents or rows  (represented by numerical identifier)
+that satisfy some property. Besides adding or removing
+elements from the set, we need fast functions
+to compute the intersection, the union, the difference between sets, and so on.
+
+
+To implement a set
+of integers, a particularly appealing strategy is the
+bitmap (also called bitset or bit vector). Using n bits,
+we can represent any set made of the integers from the range
+[0,n): the ith bit is set to one if integer i is present in the set.
+Commodity processors use words of W=32 or W=64 bits. By combining many such words, we can
+support large values of n. Intersections, unions and differences can then be implemented
+ as bitwise AND, OR and ANDNOT operations.
+More complicated set functions can also be implemented as bitwise operations.
+
+When the bitset approach is applicable, it can be orders of
+magnitude faster than other possible implementation of a set (e.g., as a hash set)
+while using several times less memory.
+
+However, a bitset, even a compressed one is not always applicable. For example, if the
+you have 1000 random-looking integers, then a simple array might be the best representation.
+We refer to this case as the "sparse" scenario.
+
+When should you use compressed bitmaps?
+===================================
+
+An uncompressed BitSet can use a lot of memory. For example, if you take a BitSet
+and set the bit at position 1,000,000 to true and you have just over 100kB. That is over 100kB
+to store the position of one bit. This is wasteful  even if you do not care about memory:
+suppose that you need to compute the intersection between this BitSet and another one
+that has a bit at position 1,000,001 to true, then you need to go through all these zeroes,
+whether you like it or not. That can become very wasteful.
+
+This being said, there are definitively cases where attempting to use compressed bitmaps is wasteful.
+For example, if you have a small universe size. E.g., your bitmaps represent sets of integers
+from [0,n) where n is small (e.g., n=64 or n=128). If you are able to uncompressed BitSet and
+it does not blow up your memory usage,  then compressed bitmaps are probably not useful
+to you. In fact, if you do not need compression, then a BitSet offers remarkable speed.
+
+The sparse scenario is another use case where compressed bitmaps should not be used.
+Keep in mind that random-looking data is usually not compressible. E.g., if you have a small set of
+32-bit random integers, it is not mathematically possible to use far less than 32 bits per integer,
+and attempts at compression can be counterproductive.
+
+How does Roaring compares with the alternatives?
+==================================================
+
+
+Most alternatives to Roaring are part of a larger family of compressed bitmaps that are run-length-encoded
+bitmaps. They identify long runs of 1s or 0s and they represent them with a marker word.
+If you have a local mix of 1s and 0, you use an uncompressed word.
+
+There are many formats in this family:
+
+* Oracle's BBC is an obsolete format at this point: though it may provide good compression,
+it is likely much slower than more recent alternatives due to excessive branching.
+* WAH is a patented variation on BBC that provides better performance.
+* Concise is a variation on the patented WAH. It some specific instances, it can compress
+much better than WAH (up to 2x better), but it is generally slower.
+* EWAH is both free of patent, and it is faster than all the above. On the downside, it
+does not compress quite as well. It is faster because it allows some form of "skipping"
+over uncompressed words. So though none of these formats are great at random access, EWAH
+is better than the alternatives.
+
+
+
+There is a big problem with these formats however that can hurt you badly in some cases: there is no random access. If you want to check whether a given value is present in the set, you have to start from the beginning and "uncompress" the whole thing. This means that if you want to intersect a big set with a large set, you still have to uncompress the whole big set in the worst case...
+
+Roaring solves this problem. It works in the following manner. It divides the data into chunks of 2<sup>16</sup> integers
+(e.g., [0, 2<sup>16</sup>), [2<sup>16</sup>, 2 x 2<sup>16</sup>), ...). Within a chunk, it can use an uncompressed bitmap, a simple list of integers,
+or a list of runs. Whatever format it uses, they all allow you to check for the present of any one value quickly
+(e.g., with a binary search). The net result is that Roaring can compute many operations much faster than run-length-encoded
+formats like WAH, EWAH, Concise... Maybe surprisingly, Roaring also generally offers better compression ratios.
+
+
+
+
 
 ### References
 

vendor/github.com/RoaringBitmap/roaring/arraycontainer.go

@@ -359,28 +359,17 @@ func (ac *arrayContainer) iorArray(value2 *arrayContainer) container {
 	len1 := value1.getCardinality()
 	len2 := value2.getCardinality()
 	maxPossibleCardinality := len1 + len2
-	if maxPossibleCardinality > arrayDefaultMaxSize { // it could be a bitmap!
-		bc := newBitmapContainer()
-		for k := 0; k < len(value2.content); k++ {
-			v := value2.content[k]
-			i := uint(v) >> 6
-			mask := uint64(1) << (v % 64)
-			bc.bitmap[i] |= mask
-		}
-		for k := 0; k < len(ac.content); k++ {
-			v := ac.content[k]
-			i := uint(v) >> 6
-			mask := uint64(1) << (v % 64)
-			bc.bitmap[i] |= mask
-		}
-		bc.cardinality = int(popcntSlice(bc.bitmap))
-		if bc.cardinality <= arrayDefaultMaxSize {
-			return bc.toArrayContainer()
-		}
-		return bc
-	}
 	if maxPossibleCardinality > cap(value1.content) {
-		newcontent := make([]uint16, 0, maxPossibleCardinality)
+		// doubling the capacity reduces new slice allocations in the case of
+		// repeated calls to iorArray().
+		newSize := 2 * maxPossibleCardinality
+		// the second check is to handle overly large array containers
+		// and should not occur in normal usage,
+		// as all array containers should be at most arrayDefaultMaxSize
+		if newSize > 2*arrayDefaultMaxSize && maxPossibleCardinality <= 2*arrayDefaultMaxSize {
+			newSize = 2 * arrayDefaultMaxSize
+		}
+		newcontent := make([]uint16, 0, newSize)
 		copy(newcontent[len2:maxPossibleCardinality], ac.content[0:len1])
 		ac.content = newcontent
 	} else {
@@ -388,6 +377,13 @@ func (ac *arrayContainer) iorArray(value2 *arrayContainer) container {
 	}
 	nl := union2by2(value1.content[len2:maxPossibleCardinality], value2.content, ac.content)
 	ac.content = ac.content[:nl] // reslice to match actual used capacity
+
+	if nl > arrayDefaultMaxSize {
+		// Only converting to a bitmap when arrayDefaultMaxSize
+		// is actually exceeded minimizes conversions in the case of repeated
+		// calls to iorArray().
+		return ac.toBitmapContainer()
+	}
 	return ac
 }
 

vendor/github.com/RoaringBitmap/roaring/go.mod

@@ -1,6 +1,6 @@
 module github.com/RoaringBitmap/roaring
 
-go 1.12
+go 1.14
 
 require (
 	github.com/glycerine/go-unsnap-stream v0.0.0-20181221182339-f9677308dec2
@@ -13,4 +13,6 @@ require (
 	github.com/stretchr/testify v1.4.0
 	github.com/tinylib/msgp v1.1.0
 	github.com/willf/bitset v1.1.10
+	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
+	golang.org/x/tools v0.0.0-20200928182047-19e03678916f // indirect
 )

vendor/github.com/RoaringBitmap/roaring/go.sum

@@ -24,6 +24,31 @@ github.com/tinylib/msgp v1.1.0 h1:9fQd+ICuRIu/ue4vxJZu6/LzxN0HwMds2nq/0cFvxHU=
 github.com/tinylib/msgp v1.1.0/go.mod h1:+d+yLhGm8mzTaHzB+wgMYrodPfmZrzkirds8fDWklFE=
 github.com/willf/bitset v1.1.10 h1:NotGKqX0KwQ72NUzqrjZq5ipPNDQex9lo3WpaS8L2sc=
 github.com/willf/bitset v1.1.10/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPySAYV4=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
+golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7 h1:EBZoQjiKKPaLbPrbpssUfuHtwM6KV/vb4U85g/cigFY=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
+golang.org/x/tools v0.0.0-20200928182047-19e03678916f h1:VwGa2Wf+rHGIxvsssCkUNIyFv8jQY0VCBCNWtikoWq0=
+golang.org/x/tools v0.0.0-20200928182047-19e03678916f/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=

vendor/github.com/RoaringBitmap/roaring/roaring.go

@@ -345,9 +345,9 @@ func newIntReverseIterator(a *Bitmap) *intReverseIterator {
 
 // ManyIntIterable allows you to iterate over the values in a Bitmap
 type ManyIntIterable interface {
-	// pass in a buffer to fill up with values, returns how many values were returned
+	// NextMany fills buf up with values, returns how many values were returned
 	NextMany(buf []uint32) int
-	// pass in a buffer to fill up with 64 bit values, returns how many values were returned
+	// NextMany64 fills up buf with 64 bit values, uses hs as a mask (OR), returns how many values were returned
 	NextMany64(hs uint64, buf []uint64) int
 }
 
@@ -1006,7 +1006,7 @@ main:
 				}
 				s2 = x2.highlowcontainer.getKeyAtIndex(pos2)
 			} else {
-				rb.highlowcontainer.replaceKeyAndContainerAtIndex(pos1, s1, rb.highlowcontainer.getWritableContainerAtIndex(pos1).ior(x2.highlowcontainer.getContainerAtIndex(pos2)), false)
+				rb.highlowcontainer.replaceKeyAndContainerAtIndex(pos1, s1, rb.highlowcontainer.getUnionedWritableContainer(pos1, x2.highlowcontainer.getContainerAtIndex(pos2)), false)
 				pos1++
 				pos2++
 				if (pos1 == length1) || (pos2 == length2) {
@@ -1581,7 +1581,3 @@ func (rb *Bitmap) Stats() Statistics {
 	}
 	return stats
 }
-
-func (rb *Bitmap) FillLeastSignificant32bits(x []uint64, i uint64, mask uint64) {
-	rb.ManyIterator().NextMany64(mask, x[i:])
-}

vendor/github.com/RoaringBitmap/roaring/roaringarray.go

@@ -328,6 +328,17 @@ func (ra *roaringArray) getFastContainerAtIndex(i int, needsWriteable bool) cont
 	return c
 }
 
+// getUnionedWritableContainer switches behavior for in-place Or
+// depending on whether the container requires a copy on write.
+// If it does using the non-inplace or() method leads to fewer allocations.
+func (ra *roaringArray) getUnionedWritableContainer(pos int, other container) container {
+	if ra.needCopyOnWrite[pos] {
+		return ra.getContainerAtIndex(pos).or(other)
+	}
+	return ra.getContainerAtIndex(pos).ior(other)
+
+}
+
 func (ra *roaringArray) getWritableContainerAtIndex(i int) container {
 	if ra.needCopyOnWrite[i] {
 		ra.containers[i] = ra.containers[i].clone()

vendor/github.com/RoaringBitmap/roaring/serialization_generic.go

@@ -1,4 +1,4 @@
-// +build !amd64,!386 appengine
+// +build !amd64,!386,!arm,!arm64,!ppc64le,!mipsle,!mips64le,!mips64p32le,!wasm appengine
 
 package roaring
 

vendor/github.com/RoaringBitmap/roaring/serialization_littleendian.go

@@ -1,4 +1,4 @@
-// +build 386 amd64,!appengine
+// +build 386,!appengine amd64,!appengine arm,!appengine arm64,!appengine ppc64le,!appengine mipsle,!appengine mips64le,!appengine mips64p32le,!appengine wasm,!appengine
 
 package roaring
 

vendor/github.com/RoaringBitmap/roaring/setutil.go

@@ -135,66 +135,6 @@ func exclusiveUnion2by2(set1 []uint16, set2 []uint16, buffer []uint16) int {
 	return pos
 }
 
-func union2by2(set1 []uint16, set2 []uint16, buffer []uint16) int {
-	pos := 0
-	k1 := 0
-	k2 := 0
-	if 0 == len(set2) {
-		buffer = buffer[:len(set1)]
-		copy(buffer, set1[:])
-		return len(set1)
-	}
-	if 0 == len(set1) {
-		buffer = buffer[:len(set2)]
-		copy(buffer, set2[:])
-		return len(set2)
-	}
-	s1 := set1[k1]
-	s2 := set2[k2]
-	buffer = buffer[:cap(buffer)]
-	for {
-		if s1 < s2 {
-			buffer[pos] = s1
-			pos++
-			k1++
-			if k1 >= len(set1) {
-				copy(buffer[pos:], set2[k2:])
-				pos += len(set2) - k2
-				break
-			}
-			s1 = set1[k1]
-		} else if s1 == s2 {
-			buffer[pos] = s1
-			pos++
-			k1++
-			k2++
-			if k1 >= len(set1) {
-				copy(buffer[pos:], set2[k2:])
-				pos += len(set2) - k2
-				break
-			}
-			if k2 >= len(set2) {
-				copy(buffer[pos:], set1[k1:])
-				pos += len(set1) - k1
-				break
-			}
-			s1 = set1[k1]
-			s2 = set2[k2]
-		} else { // if (set1[k1]>set2[k2])
-			buffer[pos] = s2
-			pos++
-			k2++
-			if k2 >= len(set2) {
-				copy(buffer[pos:], set1[k1:])
-				pos += len(set1) - k1
-				break
-			}
-			s2 = set2[k2]
-		}
-	}
-	return pos
-}
-
 func union2by2Cardinality(set1 []uint16, set2 []uint16) int {
 	pos := 0
 	k1 := 0

vendor/github.com/RoaringBitmap/roaring/setutil_arm64.go

@@ -0,0 +1,6 @@
+// +build arm64,!gccgo,!appengine
+
+package roaring
+
+//go:noescape
+func union2by2(set1 []uint16, set2 []uint16, buffer []uint16) (size int)

vendor/github.com/RoaringBitmap/roaring/setutil_arm64.s

@@ -0,0 +1,132 @@
+// +build arm64,!gccgo,!appengine
+
+#include "textflag.h"
+
+
+// This implements union2by2 using golang's version of arm64 assembly
+// The algorithm is very similar to the generic one,
+// but makes better use of arm64 features so is notably faster.
+// The basic algorithm structure is as follows:
+// 1. If either set is empty, copy the other set into the buffer and return the length
+// 2. Otherwise, load the first element of each set into a variable (s1 and s2).
+// 3. a. Compare the values of s1 and s2.
+ // b. add the smaller one to the buffer.
+ // c. perform a bounds check before incrementing.
+ // If one set is finished, copy the rest of the other set over.
+ // d. update s1 and or s2 to the next value, continue loop.
+ //
+ // Past the fact of the algorithm, this code makes use of several arm64 features
+ // Condition Codes:
+ // arm64's CMP operation sets 4 bits that can be used for branching,
+ // rather than just true or false.
+ // As a consequence, a single comparison gives enough information to distinguish the three cases
+ //
+ // Post-increment pointers after load/store:
+ // Instructions like `MOVHU.P 2(R0), R6`
+ // increment the register by a specified amount, in this example 2.
+ // Because uint16's are exactly 2 bytes and the length of the slices
+ // is part of the slice header,
+ // there is no need to separately track the index into the slice.
+ // Instead, the code can calculate the final read value and compare against that,
+ // using the post-increment reads to move the pointers along.
+ //
+ // TODO: CALL out to memmove once the list is exhausted.
+ // Right now it moves the necessary shorts so that the remaining count
+ // is a multiple of 4 and then copies 64 bits at a time.
+
+TEXT ·union2by2(SB), NOSPLIT, $0-80
+	// R0, R1, and R2 for the pointers to the three slices
+	MOVD set1+0(FP), R0
+	MOVD set2+24(FP), R1
+	MOVD buffer+48(FP), R2
+
+	//R3 and R4 will be the values at which we will have finished reading set1 and set2.
+	// R3 should be R0 + 2 * set1_len+8(FP)
+	MOVD set1_len+8(FP), R3
+	MOVD set2_len+32(FP), R4
+
+	ADD R3<<1, R0, R3
+	ADD R4<<1, R1, R4
+
+
+	//Rather than counting the number of elements added separately
+	//Save the starting register of buffer.
+	MOVD buffer+48(FP), R5
+
+	// set1 is empty, just flush set2
+	CMP R0, R3
+	BEQ flush_right
+
+	// set2 is empty, just flush set1
+	CMP R1, R4
+	BEQ flush_left
+
+	// R6, R7 are the working space for s1 and s2
+	MOVD ZR, R6
+	MOVD ZR, R7
+
+	MOVHU.P 2(R0), R6
+	MOVHU.P 2(R1), R7
+loop:
+
+	CMP R6, R7
+	BEQ pop_both // R6 == R7
+	BLS pop_right // R6 > R7
+//pop_left: // R6 < R7
+	MOVHU.P R6, 2(R2)
+	CMP R0, R3
+	BEQ pop_then_flush_right
+	MOVHU.P 2(R0), R6
+	JMP loop
+pop_both:
+	MOVHU.P R6, 2(R2) //could also use R7, since they are equal
+	CMP R0, R3
+	BEQ flush_right
+	CMP R1, R4
+	BEQ flush_left
+	MOVHU.P 2(R0), R6
+	MOVHU.P 2(R1), R7
+	JMP loop
+pop_right:
+	MOVHU.P R7, 2(R2)
+	CMP R1, R4
+	BEQ pop_then_flush_left
+	MOVHU.P 2(R1), R7
+	JMP loop
+
+pop_then_flush_right:
+	MOVHU.P R7, 2(R2)
+flush_right:
+	MOVD R1, R0
+	MOVD R4, R3
+	JMP flush_left
+pop_then_flush_left:
+	MOVHU.P R6, 2(R2)
+flush_left:
+	CMP R0, R3
+	BEQ return
+	//figure out how many bytes to slough off. Must be a multiple of two
+	SUB R0, R3, R4
+	ANDS $6, R4
+	BEQ long_flush //handles the 0 mod 8 case
+	SUBS $4, R4, R4 // since possible values are 2, 4, 6, this splits evenly
+	BLT pop_single  // exactly the 2 case
+	MOVW.P 4(R0), R6
+	MOVW.P R6, 4(R2)
+	BEQ long_flush // we're now aligned by 64 bits, as R4==4, otherwise 2 more
+pop_single:
+	MOVHU.P 2(R0), R6
+	MOVHU.P R6, 2(R2)
+long_flush:
+	// at this point we know R3 - R0 is a multiple of 8.
+	CMP R0, R3
+	BEQ return
+	MOVD.P 8(R0), R6
+	MOVD.P R6, 8(R2)
+	JMP long_flush
+return:
+	// number of shorts written is (R5 - R2) >> 1
+	SUB R5, R2
+	LSR $1, R2, R2
+	MOVD R2, size+72(FP)
+	RET

vendor/github.com/RoaringBitmap/roaring/setutil_generic.go

@@ -0,0 +1,63 @@
+// +build !arm64 gccgo appengine
+
+package roaring
+
+func union2by2(set1 []uint16, set2 []uint16, buffer []uint16) int {
+	pos := 0
+	k1 := 0
+	k2 := 0
+	if 0 == len(set2) {
+		buffer = buffer[:len(set1)]
+		copy(buffer, set1[:])
+		return len(set1)
+	}
+	if 0 == len(set1) {
+		buffer = buffer[:len(set2)]
+		copy(buffer, set2[:])
+		return len(set2)
+	}
+	s1 := set1[k1]
+	s2 := set2[k2]
+	buffer = buffer[:cap(buffer)]
+	for {
+		if s1 < s2 {
+			buffer[pos] = s1
+			pos++
+			k1++
+			if k1 >= len(set1) {
+				copy(buffer[pos:], set2[k2:])
+				pos += len(set2) - k2
+				break
+			}
+			s1 = set1[k1]
+		} else if s1 == s2 {
+			buffer[pos] = s1
+			pos++
+			k1++
+			k2++
+			if k1 >= len(set1) {
+				copy(buffer[pos:], set2[k2:])
+				pos += len(set2) - k2
+				break
+			}
+			if k2 >= len(set2) {
+				copy(buffer[pos:], set1[k1:])
+				pos += len(set1) - k1
+				break
+			}
+			s1 = set1[k1]
+			s2 = set2[k2]
+		} else { // if (set1[k1]>set2[k2])
+			buffer[pos] = s2
+			pos++
+			k2++
+			if k2 >= len(set2) {
+				copy(buffer[pos:], set1[k1:])
+				pos += len(set1) - k1
+				break
+			}
+			s2 = set2[k2]
+		}
+	}
+	return pos
+}

vendor/github.com/denisenkom/go-mssqldb/appveyor.yml

@@ -1,6 +1,7 @@
 version: 1.0.{build}
 
-os: Windows Server 2012 R2
+image:
+  - Visual Studio 2015
 
 clone_folder: c:\gopath\src\github.com\denisenkom\go-mssqldb
 
@@ -10,20 +11,35 @@ environment:
   SQLUSER: sa
   SQLPASSWORD: Password12!
   DATABASE: test
-  GOVERSION: 111
+  GOVERSION: 113
   matrix:
     - GOVERSION: 18
-      SQLINSTANCE: SQL2016
+      SQLINSTANCE: SQL2017
     - GOVERSION: 19
-      SQLINSTANCE: SQL2016
+      SQLINSTANCE: SQL2017
     - GOVERSION: 110
-      SQLINSTANCE: SQL2016
+      SQLINSTANCE: SQL2017
     - GOVERSION: 111
-      SQLINSTANCE: SQL2016
+      SQLINSTANCE: SQL2017
+    - GOVERSION: 112
+      SQLINSTANCE: SQL2017
+    - SQLINSTANCE: SQL2017
+    - SQLINSTANCE: SQL2016
     - SQLINSTANCE: SQL2014
     - SQLINSTANCE: SQL2012SP1
     - SQLINSTANCE: SQL2008R2SP2
 
+    #  Go 1.14+ and SQL2019 are available on the Visual Studio 2019 image only
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      GOVERSION: 114
+      SQLINSTANCE: SQL2019
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      GOVERSION: 115
+      SQLINSTANCE: SQL2019
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      GOVERSION: 115
+      SQLINSTANCE: SQL2017
+
 install:
   - set GOROOT=c:\go%GOVERSION%
   - set PATH=%GOPATH%\bin;%GOROOT%\bin;%PATH%
@@ -44,7 +60,6 @@ before_test:
   - sqlcmd -S "(local)\%SQLINSTANCE%" -h -1 -Q "set nocount on; Select @@version"
   - pip install codecov
 
-
 test_script:
   - go test -race -cpu 4 -coverprofile=coverage.txt -covermode=atomic
   - codecov -f coverage.txt

vendor/github.com/denisenkom/go-mssqldb/mssql.go

@@ -285,7 +285,7 @@ func (c *Conn) begin(ctx context.Context, tdsIsolation isoLevel) (tx driver.Tx,
 	}
 	tx, err = c.processBeginResponse(ctx)
 	if err != nil {
-		return nil, c.checkBadConn(err)
+		return nil, err
 	}
 	return
 }

vendor/github.com/denisenkom/go-mssqldb/tds.go

@@ -838,6 +838,12 @@ func connect(ctx context.Context, c *Connector, log optionalLogger, p connectPar
 		defer cancel()
 	}
 	// if instance is specified use instance resolution service
+	if p.instance != "" && p.port != 0 {
+		// both instance name and port specified
+		// when port is specified instance name is not used
+		// you should not provide instance name when you provide port
+		log.Println("WARN: You specified both instance name and port in the connection string, port will be used and instance name will be ignored");
+	}
 	if p.instance != "" && p.port == 0 {
 		p.instance = strings.ToUpper(p.instance)
 		d := c.getDialer(&p)

vendor/github.com/denisenkom/go-mssqldb/token.go

@@ -704,14 +704,18 @@ func (ts *parseResp) sendAttention(ch chan tokenStruct) parseRespIter {
 }
 
 func (ts *parseResp) dlog(msg string) {
-	if ts.sess.logFlags&logDebug != 0 {
+	// logging from goroutine is disabled to prevent
+	// data race detection from firing
+	// The race is probably happening when
+	// test logger changes between tests.
+	/*if ts.sess.logFlags&logDebug != 0 {
 		ts.sess.log.Println(msg)
-	}
+	}*/
 }
 func (ts *parseResp) dlogf(f string, v ...interface{}) {
-	if ts.sess.logFlags&logDebug != 0 {
+	/*if ts.sess.logFlags&logDebug != 0 {
 		ts.sess.log.Printf(f, v...)
-	}
+	}*/
 }
 
 func (ts *parseResp) iter(ctx context.Context, ch chan tokenStruct, tokChan chan tokenStruct) parseRespIter {

vendor/github.com/editorconfig/editorconfig-core-go/v2/CHANGELOG.md

@@ -1,5 +1,14 @@
 # Change log
 
+## v2.3.8 - 2020-10-17
+
+- Feat more tests
+  ([#83](https://github.com/editorconfig/editorconfig-core-go/pull/83));
+- Upgrade go-ini v1.61.0
+  ([#84](https://github.com/editorconfig/editorconfig-core-go/pull/84));
+- Upgrade go-ini v1.62.0
+  ([#85](https://github.com/editorconfig/editorconfig-core-go/pull/85)).
+
 ## v2.3.7 - 2020-09-05
 
 - Upgrade go-ini v1.60.2, and go-cmp v0.5.2

vendor/github.com/editorconfig/editorconfig-core-go/v2/go.mod

@@ -6,5 +6,5 @@ require (
 	github.com/google/go-cmp v0.5.2
 	github.com/smartystreets/goconvey v1.6.4 // indirect
 	golang.org/x/mod v0.3.0
-	gopkg.in/ini.v1 v1.60.2
+	gopkg.in/ini.v1 v1.62.0
 )

vendor/github.com/editorconfig/editorconfig-core-go/v2/go.sum

@@ -27,5 +27,5 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/ini.v1 v1.60.2 h1:7i8mqModL63zqi8nQn8Q3+0zvSCZy1AxhBgthKfi4WU=
+gopkg.in/ini.v1 v1.62.0 h1:duBzk771uxoUuOlyRLkHsygud9+5lrlGjdFBb4mSKDU=
-gopkg.in/ini.v1 v1.60.2/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=

vendor/github.com/ethantkoenig/rupture/.travis.yml

@@ -1,8 +1,8 @@
 language: go
 
 go:
-  - 1.8.x
+  - "1.10.x"
-  - 1.9.x
+  - "1.11.x"
 
 before_script:
   - go get -u github.com/golang/lint/golint

vendor/github.com/ethantkoenig/rupture/README.md

@@ -1,6 +1,6 @@
 # rupture
 
-[![Build Status](https://travis-ci.org/ethantkoenig/rupture.svg?branch=master)](https://travis-ci.org/ethantkoenig/rupture) [![GoDoc](https://godoc.org/github.com/ethantkoenig/rupture?status.svg)](https://godoc.org/github.com/ethantkoenig/rupture) [![Go Report Card](https://goreportcard.com/badge/blevesearch/bleve)](https://goreportcard.com/report/blevesearch/bleve)
+[![Build Status](https://travis-ci.org/ethantkoenig/rupture.svg?branch=master)](https://travis-ci.org/ethantkoenig/rupture) [![GoDoc](https://godoc.org/github.com/ethantkoenig/rupture?status.svg)](https://godoc.org/github.com/ethantkoenig/rupture) [![Go Report Card](https://goreportcard.com/badge/github.com/ethantkoenig/rupture)](https://goreportcard.com/report/github.com/ethantkoenig/rupture)
 
 An explosive companion to the [bleve indexing library](https://www.github.com/blevesearch/bleve)
 

vendor/github.com/go-testfixtures/testfixtures/v3/CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## v3.4.1 - 2020-10-19
+
+- Fix for Microsoft SQL Server databases with views
+  ([#78](https://github.com/go-testfixtures/testfixtures/pull/78)).
+
 ## v3.4.0 - 2020-08-09
 
 - Add support to CockroachDB

vendor/github.com/go-testfixtures/testfixtures/v3/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.14-alpine
+FROM golang:1.15-alpine
 
 RUN apk update
 RUN apk add alpine-sdk

vendor/github.com/go-testfixtures/testfixtures/v3/README.md

@@ -1,6 +1,6 @@
 # testfixtures
 
-[![GoDoc](https://godoc.org/github.com/go-testfixtures/testfixtures?status.svg)][doc]
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/go-testfixtures/testfixtures/v3?tab=doc)](https://pkg.go.dev/github.com/go-testfixtures/testfixtures/v3?tab=doc)
 
 > ***Warning***: this package will wipe the database data before loading the
 fixtures! It is supposed to be used on a test database. Please, double check
@@ -436,8 +436,15 @@ each test run in a transaction.
 ## CLI
 
 We also have a CLI to load fixtures in a given database.
+
 Grab it from the [releases page](https://github.com/go-testfixtures/testfixtures/releases)
-and use it like:
+or install with Homebrew:
+
+```bash
+brew install go-testfixtures/tap/testfixtures
+```
+
+Usage is like this:
 
 ```bash
 testfixtures -d postgres -c "postgres://user:password@localhost/database" -D testdata/fixtures
@@ -445,7 +452,7 @@ testfixtures -d postgres -c "postgres://user:password@localhost/database" -D tes
 
 The connection string changes for each database driver.
 
-Use `--help` for all flags.
+Use `testfixtures --help` for all flags.
 
 ## Contributing
 
@@ -490,7 +497,6 @@ unit test database code without having to connect to a real database
 - [dbcleaner][dbcleaner] - Clean database for testing, inspired by
 database_cleaner for Ruby
 
-[doc]: https://pkg.go.dev/github.com/go-testfixtures/testfixtures/v3?tab=doc
 [railstests]: http://guides.rubyonrails.org/testing.html#the-test-database
 [gotxdb]: https://github.com/DATA-DOG/go-txdb
 [gosqlmock]: https://github.com/DATA-DOG/go-sqlmock

vendor/github.com/go-testfixtures/testfixtures/v3/sqlserver.go

@@ -56,7 +56,7 @@ func (*sqlserver) databaseName(q queryable) (string, error) {
 }
 
 func (*sqlserver) tableNames(q queryable) ([]string, error) {
-	rows, err := q.Query("SELECT table_schema + '.' + table_name FROM information_schema.tables WHERE table_name <> 'spt_values'")
+	rows, err := q.Query("SELECT table_schema + '.' + table_name FROM information_schema.tables WHERE table_name <> 'spt_values' AND table_type = 'BASE TABLE'")
 	if err != nil {
 		return nil, err
 	}

vendor/github.com/hashicorp/go-retryablehttp/README.md

@@ -26,6 +26,7 @@ fails so that the full request can be attempted again. See the
 details.
 
 Version 0.6.0 and before are compatible with Go prior to 1.12. From 0.6.1 onward, Go 1.12+ is required.
+From 0.6.7 onward, Go 1.13+ is required.
 
 Example Use
 ===========

vendor/github.com/hashicorp/go-retryablehttp/client.go

@@ -404,44 +404,9 @@ func DefaultRetryPolicy(ctx context.Context, resp *http.Response, err error) (bo
 		return false, ctx.Err()
 	}
 
-	if err != nil {
+	// don't propagate other errors
-		if v, ok := err.(*url.Error); ok {
+	shouldRetry, _ := baseRetryPolicy(resp, err)
-			// Don't retry if the error was due to too many redirects.
+	return shouldRetry, nil
-			if redirectsErrorRe.MatchString(v.Error()) {
-				return false, nil
-			}
-
-			// Don't retry if the error was due to an invalid protocol scheme.
-			if schemeErrorRe.MatchString(v.Error()) {
-				return false, nil
-			}
-
-			// Don't retry if the error was due to TLS cert verification failure.
-			if _, ok := v.Err.(x509.UnknownAuthorityError); ok {
-				return false, nil
-			}
-		}
-
-		// The error is likely recoverable so retry.
-		return true, nil
-	}
-
-	// 429 Too Many Requests is recoverable. Sometimes the server puts
-	// a Retry-After response header to indicate when the server is
-	// available to start processing request from client.
-	if resp.StatusCode == http.StatusTooManyRequests {
-		return true, nil
-	}
-
-	// Check the response code. We retry on 500-range responses to allow
-	// the server time to recover, as 500's are typically not permanent
-	// errors and may relate to outages on the server side. This will catch
-	// invalid response codes as well, like 0 and 999.
-	if resp.StatusCode == 0 || (resp.StatusCode >= 500 && resp.StatusCode != 501) {
-		return true, nil
-	}
-
-	return false, nil
 }
 
 // ErrorPropagatedRetryPolicy is the same as DefaultRetryPolicy, except it
@@ -453,6 +418,10 @@ func ErrorPropagatedRetryPolicy(ctx context.Context, resp *http.Response, err er
 		return false, ctx.Err()
 	}
 
+	return baseRetryPolicy(resp, err)
+}
+
+func baseRetryPolicy(resp *http.Response, err error) (bool, error) {
 	if err != nil {
 		if v, ok := err.(*url.Error); ok {
 			// Don't retry if the error was due to too many redirects.
@@ -475,6 +444,13 @@ func ErrorPropagatedRetryPolicy(ctx context.Context, resp *http.Response, err er
 		return true, nil
 	}
 
+	// 429 Too Many Requests is recoverable. Sometimes the server puts
+	// a Retry-After response header to indicate when the server is
+	// available to start processing request from client.
+	if resp.StatusCode == http.StatusTooManyRequests {
+		return true, nil
+	}
+
 	// Check the response code. We retry on 500-range responses to allow
 	// the server time to recover, as 500's are typically not permanent
 	// errors and may relate to outages on the server side. This will catch

vendor/github.com/jaytaylor/html2text/.travis.yml

@@ -1,12 +1,12 @@
 language: go
 go:
+  # n.b. For golang release history, see https://golang.org/doc/devel/release.html
   - tip
-  - 1.7
+  - "1.13.8"
-  - 1.6
+  - "1.12.17"
-  - 1.5
+  - "1.11.13"
-  - 1.4
+  - "1.10.8"
-  - 1.3
+  - "1.9.7"
-  - 1.2
 notifications:
   email:
     on_success: change

vendor/github.com/jaytaylor/html2text/README.md

@@ -4,11 +4,15 @@
 [![Build Status](https://travis-ci.org/jaytaylor/html2text.svg?branch=master)](https://travis-ci.org/jaytaylor/html2text)
 [![Report Card](https://goreportcard.com/badge/github.com/jaytaylor/html2text)](https://goreportcard.com/report/github.com/jaytaylor/html2text)
 
-### Converts HTML into text
+### Converts HTML into text of the markdown-flavored variety
 
 
 ## Introduction
 
+Ensure your emails are readable by all!
+
+Turns HTML into raw text, useful for sending fancy HTML emails with an equivalently nicely formatted TXT document as a fallback (e.g. for people who don't allow HTML emails or have other display issues).
+
 html2text is a simple golang package for rendering HTML into plaintext.
 
 There are still lots of improvements to be had, but FWIW this has worked fine for my [basic] HTML-2-text needs.
@@ -19,7 +23,7 @@ It requires go 1.x or newer ;)
 ## Download the package
 
 ```bash
-go get github.com/jaytaylor/html2text
+go get jaytaylor.com/html2text
 ```
 
 ## Example usage
@@ -30,12 +34,12 @@ package main
 import (
 	"fmt"
 
-	"github.com/jaytaylor/html2text"
+	"jaytaylor.com/html2text"
 )
 
 func main() {
-	inputHtml := `
+	inputHTML := `
-          <html>
+<html>
   <head>
     <title>My Mega Service</title>
     <link rel=\"stylesheet\" href=\"main.css\">
@@ -44,7 +48,7 @@ func main() {
 
   <body>
     <div class="logo">
-                <a href="http://mymegaservice.com/"><img src="/logo-image.jpg" alt="Mega Service"/></a>
+      <a href="http://jaytaylor.com/"><img src="/logo-image.jpg" alt="Mega Service"/></a>
     </div>
 
     <h1>Welcome to your new account on my service!</h1>
@@ -58,11 +62,23 @@ func main() {
         <li>Something else</li>
       </ul>
     </p>
-            </body>
-          </html>
-	`
 
-	text, err := html2text.FromString(inputHtml)
+    <table>
+      <thead>
+        <tr><th>Header 1</th><th>Header 2</th></tr>
+      </thead>
+      <tfoot>
+        <tr><td>Footer 1</td><td>Footer 2</td></tr>
+      </tfoot>
+      <tbody>
+        <tr><td>Row 1 Col 1</td><td>Row 1 Col 2</td></tr>
+        <tr><td>Row 2 Col 1</td><td>Row 2 Col 2</td></tr>
+      </tbody>
+    </table>
+  </body>
+</html>`
+
+	text, err := html2text.FromString(inputHTML, html2text.Options{PrettyTables: true})
 	if err != nil {
 		panic(err)
 	}
@@ -72,7 +88,7 @@ func main() {
 
 Output:
 ```
-Mega Service ( http://mymegaservice.com/ )
+Mega Service ( http://jaytaylor.com/ )
 
 ******************************************
 Welcome to your new account on my service!
@@ -83,6 +99,15 @@ Here is some more information:
 * Link 1: Example.com ( https://example.com )
 * Link 2: Example2.com ( https://example2.com )
 * Something else
+
++-------------+-------------+
+|  HEADER 1   |  HEADER 2   |
++-------------+-------------+
+| Row 1 Col 1 | Row 1 Col 2 |
+| Row 2 Col 1 | Row 2 Col 2 |
++-------------+-------------+
+|  FOOTER 1   |  FOOTER 2   |
++-------------+-------------+
 ```
 
 
@@ -110,3 +135,6 @@ Email: jay at (my github username).com
 
 Twitter: [@jtaylor](https://twitter.com/jtaylor)
 
+# Alternatives
+
+https://github.com/k3a/html2text - Lightweight

vendor/github.com/jaytaylor/html2text/html2text.go

@@ -7,57 +7,163 @@ import (
 	"strings"
 	"unicode"
 
+	"github.com/olekukonko/tablewriter"
+	"github.com/ssor/bom"
 	"golang.org/x/net/html"
 	"golang.org/x/net/html/atom"
 )
 
+// Options provide toggles and overrides to control specific rendering behaviors.
+type Options struct {
+	PrettyTables        bool                 // Turns on pretty ASCII rendering for table elements.
+	PrettyTablesOptions *PrettyTablesOptions // Configures pretty ASCII rendering for table elements.
+	OmitLinks           bool                 // Turns on omitting links
+}
+
+// PrettyTablesOptions overrides tablewriter behaviors
+type PrettyTablesOptions struct {
+	AutoFormatHeader     bool
+	AutoWrapText         bool
+	ReflowDuringAutoWrap bool
+	ColWidth             int
+	ColumnSeparator      string
+	RowSeparator         string
+	CenterSeparator      string
+	HeaderAlignment      int
+	FooterAlignment      int
+	Alignment            int
+	ColumnAlignment      []int
+	NewLine              string
+	HeaderLine           bool
+	RowLine              bool
+	AutoMergeCells       bool
+	Borders              tablewriter.Border
+}
+
+// NewPrettyTablesOptions creates PrettyTablesOptions with default settings
+func NewPrettyTablesOptions() *PrettyTablesOptions {
+	return &PrettyTablesOptions{
+		AutoFormatHeader:     true,
+		AutoWrapText:         true,
+		ReflowDuringAutoWrap: true,
+		ColWidth:             tablewriter.MAX_ROW_WIDTH,
+		ColumnSeparator:      tablewriter.COLUMN,
+		RowSeparator:         tablewriter.ROW,
+		CenterSeparator:      tablewriter.CENTER,
+		HeaderAlignment:      tablewriter.ALIGN_DEFAULT,
+		FooterAlignment:      tablewriter.ALIGN_DEFAULT,
+		Alignment:            tablewriter.ALIGN_DEFAULT,
+		ColumnAlignment:      []int{},
+		NewLine:              tablewriter.NEWLINE,
+		HeaderLine:           true,
+		RowLine:              false,
+		AutoMergeCells:       false,
+		Borders:              tablewriter.Border{Left: true, Right: true, Bottom: true, Top: true},
+	}
+}
+
+// FromHTMLNode renders text output from a pre-parsed HTML document.
+func FromHTMLNode(doc *html.Node, o ...Options) (string, error) {
+	var options Options
+	if len(o) > 0 {
+		options = o[0]
+	}
+
+	ctx := textifyTraverseContext{
+		buf:     bytes.Buffer{},
+		options: options,
+	}
+	if err := ctx.traverse(doc); err != nil {
+		return "", err
+	}
+
+	text := strings.TrimSpace(newlineRe.ReplaceAllString(
+		strings.Replace(ctx.buf.String(), "\n ", "\n", -1), "\n\n"),
+	)
+	return text, nil
+}
+
+// FromReader renders text output after parsing HTML for the specified
+// io.Reader.
+func FromReader(reader io.Reader, options ...Options) (string, error) {
+	newReader, err := bom.NewReaderWithoutBom(reader)
+	if err != nil {
+		return "", err
+	}
+	doc, err := html.Parse(newReader)
+	if err != nil {
+		return "", err
+	}
+	return FromHTMLNode(doc, options...)
+}
+
+// FromString parses HTML from the input string, then renders the text form.
+func FromString(input string, options ...Options) (string, error) {
+	bs := bom.CleanBom([]byte(input))
+	text, err := FromReader(bytes.NewReader(bs), options...)
+	if err != nil {
+		return "", err
+	}
+	return text, nil
+}
+
 var (
 	spacingRe = regexp.MustCompile(`[ \r\n\t]+`)
 	newlineRe = regexp.MustCompile(`\n\n+`)
 )
 
-type textifyTraverseCtx struct {
+// traverseTableCtx holds text-related context.
-	Buf bytes.Buffer
+type textifyTraverseContext struct {
+	buf bytes.Buffer
 
 	prefix          string
+	tableCtx        tableTraverseContext
+	options         Options
+	endsWithSpace   bool
+	justClosedDiv   bool
 	blockquoteLevel int
 	lineLength      int
-	endsWithSpace   bool
+	isPre           bool
-	endsWithNewline bool
-	justClosedDiv   bool
 }
 
-func (ctx *textifyTraverseCtx) traverse(node *html.Node) error {
+// tableTraverseContext holds table ASCII-form related context.
-	switch node.Type {
+type tableTraverseContext struct {
+	header     []string
+	body       [][]string
+	footer     []string
+	tmpRow     int
+	isInFooter bool
+}
 
-	default:
+func (tableCtx *tableTraverseContext) init() {
-		return ctx.traverseChildren(node)
+	tableCtx.body = [][]string{}
-
+	tableCtx.header = []string{}
-	case html.TextNode:
+	tableCtx.footer = []string{}
-		data := strings.Trim(spacingRe.ReplaceAllString(node.Data, " "), " ")
+	tableCtx.isInFooter = false
-		return ctx.emit(data)
+	tableCtx.tmpRow = 0
-
+}
-	case html.ElementNode:
 
+func (ctx *textifyTraverseContext) handleElement(node *html.Node) error {
 	ctx.justClosedDiv = false
+
 	switch node.DataAtom {
 	case atom.Br:
 		return ctx.emit("\n")
 
 	case atom.H1, atom.H2, atom.H3:
-			subCtx := textifyTraverseCtx{}
+		subCtx := textifyTraverseContext{}
 		if err := subCtx.traverseChildren(node); err != nil {
 			return err
 		}
 
-			str := subCtx.Buf.String()
+		str := subCtx.buf.String()
 		dividerLen := 0
 		for _, line := range strings.Split(str, "\n") {
 			if lineLen := len([]rune(line)); lineLen-1 > dividerLen {
 				dividerLen = lineLen - 1
 			}
 		}
-			divider := ""
+		var divider string
 		if node.DataAtom == atom.H1 {
 			divider = strings.Repeat("*", dividerLen)
 		} else {
@@ -100,7 +206,7 @@ func (ctx *textifyTraverseCtx) traverse(node *html.Node) error {
 			return err
 		}
 		var err error
-			if ctx.justClosedDiv == false {
+		if !ctx.justClosedDiv {
 			err = ctx.emit("\n")
 		}
 		ctx.justClosedDiv = true
@@ -118,19 +224,27 @@ func (ctx *textifyTraverseCtx) traverse(node *html.Node) error {
 		return ctx.emit("\n")
 
 	case atom.B, atom.Strong:
-			subCtx := textifyTraverseCtx{}
+		subCtx := textifyTraverseContext{}
 		subCtx.endsWithSpace = true
 		if err := subCtx.traverseChildren(node); err != nil {
 			return err
 		}
-			str := subCtx.Buf.String()
+		str := subCtx.buf.String()
 		return ctx.emit("*" + str + "*")
 
 	case atom.A:
-			// If image is the only child, take its alt text as the link text
+		linkText := ""
+		// For simple link element content with single text node only, peek at the link text.
+		if node.FirstChild != nil && node.FirstChild.NextSibling == nil && node.FirstChild.Type == html.TextNode {
+			linkText = node.FirstChild.Data
+		}
+
+		// If image is the only child, take its alt text as the link text.
 		if img := node.FirstChild; img != nil && node.LastChild == img && img.DataAtom == atom.Img {
 			if altText := getAttrVal(img, "alt"); altText != "" {
-					ctx.emit(altText)
+				if err := ctx.emit(altText); err != nil {
+					return err
+				}
 			}
 		} else if err := ctx.traverseChildren(node); err != nil {
 			return err
@@ -139,42 +253,162 @@ func (ctx *textifyTraverseCtx) traverse(node *html.Node) error {
 		hrefLink := ""
 		if attrVal := getAttrVal(node, "href"); attrVal != "" {
 			attrVal = ctx.normalizeHrefLink(attrVal)
-				if attrVal != "" {
+			// Don't print link href if it matches link element content or if the link is empty.
+			if !ctx.options.OmitLinks && attrVal != "" && linkText != attrVal {
 				hrefLink = "( " + attrVal + " )"
 			}
 		}
 
 		return ctx.emit(hrefLink)
 
-		case atom.P, atom.Ul, atom.Table:
+	case atom.P, atom.Ul:
-			if err := ctx.emit("\n\n"); err != nil {
+		return ctx.paragraphHandler(node)
-				return err
+
+	case atom.Table, atom.Tfoot, atom.Th, atom.Tr, atom.Td:
+		if ctx.options.PrettyTables {
+			return ctx.handleTableElement(node)
+		} else if node.DataAtom == atom.Table {
+			return ctx.paragraphHandler(node)
 		}
+		return ctx.traverseChildren(node)
 
-			if err := ctx.traverseChildren(node); err != nil {
+	case atom.Pre:
+		ctx.isPre = true
+		err := ctx.traverseChildren(node)
+		ctx.isPre = false
 		return err
-			}
-
-			return ctx.emit("\n\n")
-
-		case atom.Tr:
-			if err := ctx.traverseChildren(node); err != nil {
-				return err
-			}
-
-			return ctx.emit("\n")
 
 	case atom.Style, atom.Script, atom.Head:
-			// Ignore the subtree
+		// Ignore the subtree.
 		return nil
 
 	default:
 		return ctx.traverseChildren(node)
 	}
+}
+
+// paragraphHandler renders node children surrounded by double newlines.
+func (ctx *textifyTraverseContext) paragraphHandler(node *html.Node) error {
+	if err := ctx.emit("\n\n"); err != nil {
+		return err
+	}
+	if err := ctx.traverseChildren(node); err != nil {
+		return err
+	}
+	return ctx.emit("\n\n")
+}
+
+// handleTableElement is only to be invoked when options.PrettyTables is active.
+func (ctx *textifyTraverseContext) handleTableElement(node *html.Node) error {
+	if !ctx.options.PrettyTables {
+		panic("handleTableElement invoked when PrettyTables not active")
+	}
+
+	switch node.DataAtom {
+	case atom.Table:
+		if err := ctx.emit("\n\n"); err != nil {
+			return err
+		}
+
+		// Re-intialize all table context.
+		ctx.tableCtx.init()
+
+		// Browse children, enriching context with table data.
+		if err := ctx.traverseChildren(node); err != nil {
+			return err
+		}
+
+		buf := &bytes.Buffer{}
+		table := tablewriter.NewWriter(buf)
+		if ctx.options.PrettyTablesOptions != nil {
+			options := ctx.options.PrettyTablesOptions
+			table.SetAutoFormatHeaders(options.AutoFormatHeader)
+			table.SetAutoWrapText(options.AutoWrapText)
+			table.SetReflowDuringAutoWrap(options.ReflowDuringAutoWrap)
+			table.SetColWidth(options.ColWidth)
+			table.SetColumnSeparator(options.ColumnSeparator)
+			table.SetRowSeparator(options.RowSeparator)
+			table.SetCenterSeparator(options.CenterSeparator)
+			table.SetHeaderAlignment(options.HeaderAlignment)
+			table.SetFooterAlignment(options.FooterAlignment)
+			table.SetAlignment(options.Alignment)
+			table.SetColumnAlignment(options.ColumnAlignment)
+			table.SetNewLine(options.NewLine)
+			table.SetHeaderLine(options.HeaderLine)
+			table.SetRowLine(options.RowLine)
+			table.SetAutoMergeCells(options.AutoMergeCells)
+			table.SetBorders(options.Borders)
+		}
+		table.SetHeader(ctx.tableCtx.header)
+		table.SetFooter(ctx.tableCtx.footer)
+		table.AppendBulk(ctx.tableCtx.body)
+
+		// Render the table using ASCII.
+		table.Render()
+		if err := ctx.emit(buf.String()); err != nil {
+			return err
+		}
+
+		return ctx.emit("\n\n")
+
+	case atom.Tfoot:
+		ctx.tableCtx.isInFooter = true
+		if err := ctx.traverseChildren(node); err != nil {
+			return err
+		}
+		ctx.tableCtx.isInFooter = false
+
+	case atom.Tr:
+		ctx.tableCtx.body = append(ctx.tableCtx.body, []string{})
+		if err := ctx.traverseChildren(node); err != nil {
+			return err
+		}
+		ctx.tableCtx.tmpRow++
+
+	case atom.Th:
+		res, err := ctx.renderEachChild(node)
+		if err != nil {
+			return err
+		}
+
+		ctx.tableCtx.header = append(ctx.tableCtx.header, res)
+
+	case atom.Td:
+		res, err := ctx.renderEachChild(node)
+		if err != nil {
+			return err
+		}
+
+		if ctx.tableCtx.isInFooter {
+			ctx.tableCtx.footer = append(ctx.tableCtx.footer, res)
+		} else {
+			ctx.tableCtx.body[ctx.tableCtx.tmpRow] = append(ctx.tableCtx.body[ctx.tableCtx.tmpRow], res)
+		}
+
+	}
+	return nil
+}
+
+func (ctx *textifyTraverseContext) traverse(node *html.Node) error {
+	switch node.Type {
+	default:
+		return ctx.traverseChildren(node)
+
+	case html.TextNode:
+		var data string
+		if ctx.isPre {
+			data = node.Data
+		} else {
+			data = strings.TrimSpace(spacingRe.ReplaceAllString(node.Data, " "))
+		}
+		return ctx.emit(data)
+
+	case html.ElementNode:
+		return ctx.handleElement(node)
 	}
 }
 
-func (ctx *textifyTraverseCtx) traverseChildren(node *html.Node) error {
+func (ctx *textifyTraverseContext) traverseChildren(node *html.Node) error {
 	for c := node.FirstChild; c != nil; c = c.NextSibling {
 		if err := ctx.traverse(c); err != nil {
 			return err
@@ -184,31 +418,33 @@ func (ctx *textifyTraverseCtx) traverseChildren(node *html.Node) error {
 	return nil
 }
 
-func (ctx *textifyTraverseCtx) emit(data string) error {
+func (ctx *textifyTraverseContext) emit(data string) error {
-	if len(data) == 0 {
+	if data == "" {
 		return nil
 	}
-	lines := ctx.breakLongLines(data)
+	var (
-	var err error
+		lines = ctx.breakLongLines(data)
+		err   error
+	)
 	for _, line := range lines {
 		runes := []rune(line)
 		startsWithSpace := unicode.IsSpace(runes[0])
-		if !startsWithSpace && !ctx.endsWithSpace {
+		if !startsWithSpace && !ctx.endsWithSpace && !strings.HasPrefix(data, ".") {
-			ctx.Buf.WriteByte(' ')
+			if err = ctx.buf.WriteByte(' '); err != nil {
+				return err
+			}
 			ctx.lineLength++
 		}
 		ctx.endsWithSpace = unicode.IsSpace(runes[len(runes)-1])
 		for _, c := range line {
-			_, err = ctx.Buf.WriteString(string(c))
+			if _, err = ctx.buf.WriteString(string(c)); err != nil {
-			if err != nil {
 				return err
 			}
 			ctx.lineLength++
 			if c == '\n' {
 				ctx.lineLength = 0
 				if ctx.prefix != "" {
-					_, err = ctx.Buf.WriteString(ctx.prefix)
+					if _, err = ctx.buf.WriteString(ctx.prefix); err != nil {
-					if err != nil {
 						return err
 					}
 				}
@@ -218,27 +454,31 @@ func (ctx *textifyTraverseCtx) emit(data string) error {
 	return nil
 }
 
-func (ctx *textifyTraverseCtx) breakLongLines(data string) []string {
+const maxLineLen = 74
-	// only break lines when we are in blockquotes
+
+func (ctx *textifyTraverseContext) breakLongLines(data string) []string {
+	// Only break lines when in blockquotes.
 	if ctx.blockquoteLevel == 0 {
 		return []string{data}
 	}
-	var ret []string
+	var (
-	runes := []rune(data)
+		ret      = []string{}
-	l := len(runes)
+		runes    = []rune(data)
-	existing := ctx.lineLength
+		l        = len(runes)
-	if existing >= 74 {
+		existing = ctx.lineLength
+	)
+	if existing >= maxLineLen {
 		ret = append(ret, "\n")
 		existing = 0
 	}
-	for l+existing > 74 {
+	for l+existing > maxLineLen {
-		i := 74 - existing
+		i := maxLineLen - existing
 		for i >= 0 && !unicode.IsSpace(runes[i]) {
 			i--
 		}
 		if i == -1 {
-			// no spaces, so go the other way
+			// No spaces, so go the other way.
-			i = 74 - existing
+			i = maxLineLen - existing
 			for i < l && !unicode.IsSpace(runes[i]) {
 				i++
 			}
@@ -257,12 +497,33 @@ func (ctx *textifyTraverseCtx) breakLongLines(data string) []string {
 	return ret
 }
 
-func (ctx *textifyTraverseCtx) normalizeHrefLink(link string) string {
+func (ctx *textifyTraverseContext) normalizeHrefLink(link string) string {
 	link = strings.TrimSpace(link)
 	link = strings.TrimPrefix(link, "mailto:")
 	return link
 }
 
+// renderEachChild visits each direct child of a node and collects the sequence of
+// textuual representaitons separated by a single newline.
+func (ctx *textifyTraverseContext) renderEachChild(node *html.Node) (string, error) {
+	buf := &bytes.Buffer{}
+	for c := node.FirstChild; c != nil; c = c.NextSibling {
+		s, err := FromHTMLNode(c, ctx.options)
+		if err != nil {
+			return "", err
+		}
+		if _, err = buf.WriteString(s); err != nil {
+			return "", err
+		}
+		if c.NextSibling != nil {
+			if err = buf.WriteByte('\n'); err != nil {
+				return "", err
+			}
+		}
+	}
+	return buf.String(), nil
+}
+
 func getAttrVal(node *html.Node, attrName string) string {
 	for _, attr := range node.Attr {
 		if attr.Key == attrName {
@@ -272,29 +533,3 @@ func getAttrVal(node *html.Node, attrName string) string {
 
 	return ""
 }
-
-func FromReader(reader io.Reader) (string, error) {
-	doc, err := html.Parse(reader)
-	if err != nil {
-		return "", err
-	}
-
-	ctx := textifyTraverseCtx{
-		Buf: bytes.Buffer{},
-	}
-	if err = ctx.traverse(doc); err != nil {
-		return "", err
-	}
-
-	text := strings.TrimSpace(newlineRe.ReplaceAllString(
-		strings.Replace(ctx.Buf.String(), "\n ", "\n", -1), "\n\n"))
-	return text, nil
-}
-
-func FromString(input string) (string, error) {
-	text, err := FromReader(strings.NewReader(input))
-	if err != nil {
-		return "", err
-	}
-	return text, nil
-}

vendor/github.com/kballard/go-shellquote/unquote.go

@@ -40,6 +40,18 @@ func Split(input string) (words []string, err error) {
 		if strings.ContainsRune(splitChars, c) {
 			input = input[l:]
 			continue
+		} else if c == escapeChar {
+			// Look ahead for escaped newline so we can skip over it
+			next := input[l:]
+			if len(next) == 0 {
+				err = UnterminatedEscapeError
+				return
+			}
+			c2, l2 := utf8.DecodeRuneInString(next)
+			if c2 == '\n' {
+				input = next[l2:]
+				continue
+			}
 		}
 
 		var word string

vendor/github.com/mholt/archiver/v3/azure-pipelines.yml

@@ -83,6 +83,13 @@ steps:
     env
   displayName: Print Go version and environment
 
+- script: |
+    curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s v1.31.0
+    ./bin/golangci-lint run -E gofmt -E goimports -E misspell ./...
+  workingDirectory: '$(modulePath)'
+  condition: eq( variables['Agent.OS'], 'Linux' )
+  displayName: Run Lint
+
 - bash: |
     go mod tidy
     if [ ! -z "$(git status --porcelain go.mod)" ]; then
@@ -99,10 +106,6 @@ steps:
   displayName: Ensure that module definition and checksums are correct
 
 - script: |
-    go get -v -t d ./...
-    # ensure that the CORRECT golangci-list (as per go.mod) is run
-    go mod vendor
-    go run -mod=vendor github.com/golangci/golangci-lint/cmd/golangci-lint run -E gofmt -E goimports -E misspell
     go test -race ./...
   workingDirectory: '$(modulePath)'
   displayName: Run tests

vendor/github.com/mholt/archiver/v3/error.go

@@ -0,0 +1,27 @@
+package archiver
+
+import (
+	"fmt"
+	"strings"
+)
+
+// IllegalPathError is an error returned when an illegal
+// path is detected during the archival process.
+//
+// By default, only the Filename is showed on error, but you might
+// also get the absolute value of the invalid path on the AbsolutePath
+// field.
+type IllegalPathError struct {
+	AbsolutePath string
+	Filename     string
+}
+
+func (err *IllegalPathError) Error() string {
+	return fmt.Sprintf("illegal file path: %s", err.Filename)
+}
+
+// IsIllegalPathError returns true if the provided error is of
+// the type IllegalPathError.
+func IsIllegalPathError(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "illegal file path: ")
+}

vendor/github.com/mholt/archiver/v3/go.mod

@@ -1,17 +1,15 @@
 module github.com/mholt/archiver/v3
 
-go 1.12
+go 1.13
 
 require (
 	github.com/andybalholm/brotli v1.0.0
 	github.com/dsnet/compress v0.0.1
-	github.com/frankban/quicktest v1.10.0 // indirect
 	github.com/golang/snappy v0.0.1
-	github.com/golangci/golangci-lint v1.31.0
 	github.com/klauspost/compress v1.10.10
 	github.com/klauspost/pgzip v1.2.4
 	github.com/nwaples/rardecode v1.1.0
-	github.com/pierrec/lz4/v3 v3.3.2
+	github.com/pierrec/lz4/v4 v4.0.3
 	github.com/ulikunitz/xz v0.5.7
 	github.com/xi2/xz v0.0.0-20171230120015-48954b6210f8
 )

vendor/github.com/mholt/archiver/v3/go.sum

@@ -1,637 +1,24 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-code.cloudfoundry.org/bytefmt v0.0.0-20190710193110-1eb035ffe2b6/go.mod h1:wN/zk7mhREp/oviagqUXY3EwuHhWyOvAdsn5Y4CzOrc=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/Djarvur/go-err113 v0.0.0-20200511133814-5174e21577d5 h1:XTrzB+F8+SpRmbhAH8HLxhiiG6nYNwaBZjrFps1oWEk=
-github.com/Djarvur/go-err113 v0.0.0-20200511133814-5174e21577d5/go.mod h1:4UJr5HIiMZrwgkSPdsjy2uOQExX/WEILpIrO9UPGuXs=
-github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
-github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/OpenPeeDeeP/depguard v1.0.1 h1:VlW4R6jmBIv3/u1JNlawEvJMM4J+dPORPaZasQee8Us=
-github.com/OpenPeeDeeP/depguard v1.0.1/go.mod h1:xsIw86fROiiwelg+jB2uM9PiKihMMmUx/1V+TNhjQvM=
-github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/andybalholm/brotli v1.0.0 h1:7UCwP93aiSfvWpapti8g88vVVGp2qqtGyePsSuDafo4=
 github.com/andybalholm/brotli v1.0.0/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
-github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
-github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
-github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
-github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
-github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c/go.mod h1:MKsuJmJgSg28kpZDP6UIiPt0e0Oz0kqKNGyRaWEPv84=
-github.com/bombsimon/wsl/v3 v3.1.0 h1:E5SRssoBgtVFPcYWUOFJEcgaySgdtTNYzsSKDOY7ss8=
-github.com/bombsimon/wsl/v3 v3.1.0/go.mod h1:st10JtZYLE4D5sC7b8xV4zTKZwAQjCH/Hy2Pm1FNZIc=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
-github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
-github.com/coreos/etcd v3.3.13+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
-github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
-github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
-github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
-github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/daixiang0/gci v0.2.4 h1:BUCKk5nlK2m+kRIsoj+wb/5hazHvHeZieBKWd9Afa8Q=
-github.com/daixiang0/gci v0.2.4/go.mod h1:+AV8KmHTGxxwp/pY84TLQfFKp2vuKXXJVzF3kD/hfR4=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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vendor/github.com/mholt/archiver/v3/lz4.go

@@ -5,7 +5,7 @@ import (
 	"io"
 	"path/filepath"
 
-	"github.com/pierrec/lz4/v3"
+	"github.com/pierrec/lz4/v4"
 )
 
 // Lz4 facilitates LZ4 compression.
@@ -16,7 +16,14 @@ type Lz4 struct {
 // Compress reads in, compresses it, and writes it to out.
 func (lz *Lz4) Compress(in io.Reader, out io.Writer) error {
 	w := lz4.NewWriter(out)
-	w.Header.CompressionLevel = lz.CompressionLevel
+	// TODO archiver v4: use proper lz4.Fast
+	// bitshifting for backwards compatibility with lz4/v3
+	options := []lz4.Option{
+		lz4.CompressionLevelOption(lz4.CompressionLevel(1 << (8 + lz.CompressionLevel))),
+	}
+	if err := w.Apply(options...); err != nil {
+		return err
+	}
 	defer w.Close()
 	_, err := io.Copy(w, in)
 	return err

vendor/github.com/mholt/archiver/v3/rar.go

@@ -40,6 +40,10 @@ type Rar struct {
 	// especially on extraction.
 	ImplicitTopLevelFolder bool
 
+	// Strip number of leading paths. This feature is available
+	// only during unpacking of the entire archive.
+	StripComponents int
+
 	// If true, errors encountered during reading
 	// or writing a single file will be logged and
 	// the operation will continue on remaining files.
@@ -66,7 +70,7 @@ func (*Rar) CheckPath(to, filename string) error {
 	dest := filepath.Join(to, filename)
 	//prevent path traversal attacks
 	if !strings.HasPrefix(dest, to) {
-		return fmt.Errorf("illegal file path: %s", filename)
+		return &IllegalPathError{AbsolutePath: dest, Filename: filename}
 	}
 	return nil
 }
@@ -105,7 +109,7 @@ func (r *Rar) Unarchive(source, destination string) error {
 			break
 		}
 		if err != nil {
-			if r.ContinueOnError || strings.Contains(err.Error(), "illegal file path") {
+			if r.ContinueOnError || IsIllegalPathError(err) {
 				log.Printf("[ERROR] Reading file in rar archive: %v", err)
 				continue
 			}
@@ -168,6 +172,17 @@ func (r *Rar) unrarNext(to string) error {
 		return fmt.Errorf("checking path traversal attempt: %v", errPath)
 	}
 
+	if r.StripComponents > 0 {
+		if strings.Count(header.Name, "/") < r.StripComponents {
+			return nil // skip path with fewer components
+		}
+
+		for i := 0; i < r.StripComponents; i++ {
+			slash := strings.Index(header.Name, "/")
+			header.Name = header.Name[slash+1:]
+		}
+	}
+
 	return r.unrarFile(f, filepath.Join(to, header.Name))
 }
 

vendor/github.com/mholt/archiver/v3/tar.go

@@ -40,6 +40,10 @@ type Tar struct {
 	// especially on extraction.
 	ImplicitTopLevelFolder bool
 
+	// Strip number of leading paths. This feature is available
+	// only during unpacking of the entire archive.
+	StripComponents int
+
 	// If true, errors encountered during reading
 	// or writing a single file will be logged and
 	// the operation will continue on remaining files.
@@ -67,7 +71,7 @@ func (*Tar) CheckPath(to, filename string) error {
 	dest := filepath.Join(to, filename)
 	//prevent path traversal attacks
 	if !strings.HasPrefix(dest, to) {
-		return fmt.Errorf("illegal file path: %s", filename)
+		return &IllegalPathError{AbsolutePath: dest, Filename: filename}
 	}
 	return nil
 }
@@ -161,7 +165,7 @@ func (t *Tar) Unarchive(source, destination string) error {
 			break
 		}
 		if err != nil {
-			if t.ContinueOnError || strings.Contains(err.Error(), "illegal file path") {
+			if t.ContinueOnError || IsIllegalPathError(err) {
 				log.Printf("[ERROR] Reading file in tar archive: %v", err)
 				continue
 			}
@@ -233,6 +237,17 @@ func (t *Tar) untarNext(destination string) error {
 	if errPath != nil {
 		return fmt.Errorf("checking path traversal attempt: %v", errPath)
 	}
+
+	if t.StripComponents > 0 {
+		if strings.Count(header.Name, "/") < t.StripComponents {
+			return nil // skip path with fewer components
+		}
+
+		for i := 0; i < t.StripComponents; i++ {
+			slash := strings.Index(header.Name, "/")
+			header.Name = header.Name[slash+1:]
+		}
+	}
 	return t.untarFile(f, destination, header)
 }
 

vendor/github.com/mholt/archiver/v3/tarlz4.go

@@ -5,7 +5,7 @@ import (
 	"io"
 	"strings"
 
-	"github.com/pierrec/lz4/v3"
+	"github.com/pierrec/lz4/v4"
 )
 
 // TarLz4 facilitates lz4 compression
@@ -84,7 +84,14 @@ func (tlz4 *TarLz4) wrapWriter() {
 	var lz4w *lz4.Writer
 	tlz4.Tar.writerWrapFn = func(w io.Writer) (io.Writer, error) {
 		lz4w = lz4.NewWriter(w)
-		lz4w.Header.CompressionLevel = tlz4.CompressionLevel
+		// TODO archiver v4: use proper lz4.Fast
+		// bitshifting for backwards compatibility with lz4/v3
+		options := []lz4.Option{
+			lz4.CompressionLevelOption(lz4.CompressionLevel(1 << (8 + tlz4.CompressionLevel))),
+		}
+		if err := lz4w.Apply(options...); err != nil {
+			return lz4w, err
+		}
 		return lz4w, nil
 	}
 	tlz4.Tar.cleanupWrapFn = func() {

vendor/github.com/mholt/archiver/v3/zip.go

@@ -70,6 +70,10 @@ type Zip struct {
 	// especially on extraction.
 	ImplicitTopLevelFolder bool
 
+	// Strip number of leading paths. This feature is available
+	// only during unpacking of the entire archive.
+	StripComponents int
+
 	// If true, errors encountered during reading
 	// or writing a single file will be logged and
 	// the operation will continue on remaining files.
@@ -123,7 +127,7 @@ func (*Zip) CheckPath(to, filename string) error {
 	dest := filepath.Join(to, filename)
 	//prevent path traversal attacks
 	if !strings.HasPrefix(dest, to) {
-		return fmt.Errorf("illegal file path: %s", filename)
+		return &IllegalPathError{AbsolutePath: dest, Filename: filename}
 	}
 	return nil
 }
@@ -225,7 +229,7 @@ func (z *Zip) Unarchive(source, destination string) error {
 			break
 		}
 		if err != nil {
-			if z.ContinueOnError || strings.Contains(err.Error(), "illegal file path") {
+			if z.ContinueOnError || IsIllegalPathError(err) {
 				log.Printf("[ERROR] Reading file in zip archive: %v", err)
 				continue
 			}
@@ -243,19 +247,30 @@ func (z *Zip) extractNext(to string) error {
 	}
 	defer f.Close()
 
-	errPath := z.CheckPath(to, f.Header.(zip.FileHeader).Name)
-	if errPath != nil {
-		return fmt.Errorf("checking path traversal attempt: %v", errPath)
-	}
-	return z.extractFile(f, to)
-}
-
-func (z *Zip) extractFile(f File, to string) error {
 	header, ok := f.Header.(zip.FileHeader)
 	if !ok {
 		return fmt.Errorf("expected header to be zip.FileHeader but was %T", f.Header)
 	}
 
+	errPath := z.CheckPath(to, header.Name)
+	if errPath != nil {
+		return fmt.Errorf("checking path traversal attempt: %v", errPath)
+	}
+
+	if z.StripComponents > 0 {
+		if strings.Count(header.Name, "/") < z.StripComponents {
+			return nil // skip path with fewer components
+		}
+
+		for i := 0; i < z.StripComponents; i++ {
+			slash := strings.Index(header.Name, "/")
+			header.Name = header.Name[slash+1:]
+		}
+	}
+	return z.extractFile(f, to, &header)
+}
+
+func (z *Zip) extractFile(f File, to string, header *zip.FileHeader) error {
 	to = filepath.Join(to, header.Name)
 
 	// if a directory, no content; simply make the directory and return
@@ -583,7 +598,7 @@ func (z *Zip) Extract(source, target, destination string) error {
 			}
 			joined := filepath.Join(destination, end)
 
-			err = z.extractFile(f, joined)
+			err = z.extractFile(f, joined, &zfh)
 			if err != nil {
 				return fmt.Errorf("extracting file %s: %v", zfh.Name, err)
 			}

vendor/github.com/mholt/archiver/v3/zstd.go

@@ -10,11 +10,13 @@ import (
 
 // Zstd facilitates Zstandard compression.
 type Zstd struct {
+	EncoderOptions []zstd.EOption
+	DecoderOptions []zstd.DOption
 }
 
 // Compress reads in, compresses it, and writes it to out.
 func (zs *Zstd) Compress(in io.Reader, out io.Writer) error {
-	w, err := zstd.NewWriter(out)
+	w, err := zstd.NewWriter(out, zs.EncoderOptions...)
 	if err != nil {
 		return err
 	}
@@ -25,7 +27,7 @@ func (zs *Zstd) Compress(in io.Reader, out io.Writer) error {
 
 // Decompress reads in, decompresses it, and writes it to out.
 func (zs *Zstd) Decompress(in io.Reader, out io.Writer) error {
-	r, err := zstd.NewReader(in)
+	r, err := zstd.NewReader(in, zs.DecoderOptions...)
 	if err != nil {
 		return err
 	}

vendor/github.com/msteinert/pam/.travis.yml

@@ -1,8 +1,8 @@
 language: go
 
 go:
-  - 1.4
+  - 1.10.x
-  - 1.5
+  - 1.11.x
   - tip
 
 before_install:
@@ -15,4 +15,4 @@ before_install:
 
 script:
   - sudo GOROOT=$GOROOT GOPATH=$GOPATH $(which go) test -v -covermode=count -coverprofile=coverage.out .
-  - goveralls -coverprofile=coverage.out -service travis-ci -repotoken $REPO_TOKEN
+  - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then goveralls -coverprofile=coverage.out -service travis-ci -repotoken $REPO_TOKEN; fi

vendor/github.com/msteinert/pam/transaction.c

@@ -2,9 +2,15 @@
 #include <security/pam_appl.h>
 #include <string.h>
 
+#ifdef __sun
+#define PAM_CONST
+#else
+#define PAM_CONST const
+#endif
+
 int cb_pam_conv(
 	int num_msg,
-	const struct pam_message **msg,
+	PAM_CONST struct pam_message **msg,
 	struct pam_response **resp,
 	void *appdata_ptr)
 {

vendor/github.com/olivere/elastic/v7/CONTRIBUTORS

@@ -163,6 +163,7 @@ Pedro [@otherview](https://github.com/otherview)
 Pete C [@peteclark-ft](https://github.com/peteclark-ft)
 Peter Nagy [@nagypeterjob](https://github.com/nagypeterjob)
 Paolo [@ppiccolo](https://github.com/ppiccolo)
+Phillip Baker [@phillbaker](https://github.com/phillbaker)
 Igor Panychek [@panychek](https://github.com/panychek)
 Radoslaw Wesolowski [@r--w](https://github.com/r--w)
 Rafał Gałus [@rgalus](https://github.com/rgalus)

vendor/github.com/olivere/elastic/v7/client.go

@@ -25,7 +25,7 @@ import (
 
 const (
 	// Version is the current version of Elastic.
-	Version = "7.0.20"
+	Version = "7.0.21"
 
 	// DefaultURL is the default endpoint of Elasticsearch on the local machine.
 	// It is used e.g. when initializing a new Client without a specific URL.

vendor/github.com/olivere/elastic/v7/docker-compose.yml

@@ -2,7 +2,7 @@ version: '3'
 
 services:
   elasticsearch:
-    image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.9.0
+    image: docker.elastic.co/elasticsearch/elasticsearch-oss:7.9.2
     hostname: elasticsearch
     environment:
       - cluster.name=elasticsearch
@@ -28,7 +28,7 @@ services:
     ports:
       - 9200:9200
   platinum:
-    image: docker.elastic.co/elasticsearch/elasticsearch:7.9.0
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.9.2
     hostname: elasticsearch-platinum
     environment:
       - cluster.name=platinum

vendor/github.com/olivere/elastic/v7/inner_hit.go

@@ -41,6 +41,11 @@ func (hit *InnerHit) Query(query Query) *InnerHit {
 	return hit
 }
 
+func (hit *InnerHit) Collapse(collapse *CollapseBuilder) *InnerHit {
+	hit.source.Collapse(collapse)
+	return hit
+}
+
 func (hit *InnerHit) From(from int) *InnerHit {
 	hit.source.From(from)
 	return hit

vendor/github.com/olivere/elastic/v7/scroll.go

@@ -45,6 +45,7 @@ type ScrollService struct {
 	allowNoIndices     *bool
 	expandWildcards    string
 	maxResponseSize    int64
+	restTotalHitsAsInt *bool
 
 	mu       sync.RWMutex
 	scrollId string
@@ -249,6 +250,13 @@ func (s *ScrollService) TrackTotalHits(trackTotalHits interface{}) *ScrollServic
 	return s
 }
 
+// RestTotalHitsAsInt indicates whether hits.total should be rendered as an
+// integer or an object in the rest search response.
+func (s *ScrollService) RestTotalHitsAsInt(enabled bool) *ScrollService {
+	s.restTotalHitsAsInt = &enabled
+	return s
+}
+
 // Routing is a list of specific routing values to control the shards
 // the search will be executed on.
 func (s *ScrollService) Routing(routings ...string) *ScrollService {
@@ -507,6 +515,9 @@ func (s *ScrollService) buildFirstURL() (string, url.Values, error) {
 	if s.ignoreThrottled != nil {
 		params.Set("ignore_throttled", fmt.Sprintf("%v", *s.ignoreThrottled))
 	}
+	if v := s.restTotalHitsAsInt; v != nil {
+		params.Set("rest_total_hits_as_int", fmt.Sprint(*v))
+	}
 
 	return path, params, nil
 }
@@ -607,6 +618,9 @@ func (s *ScrollService) buildNextURL() (string, url.Values, error) {
 		}
 		params.Set("filter_path", strings.Join(s.filterPath, ","))
 	}
+	if v := s.restTotalHitsAsInt; v != nil {
+		params.Set("rest_total_hits_as_int", fmt.Sprint(*v))
+	}
 
 	return path, params, nil
 }

vendor/github.com/philhofer/fwd/reader.go

@@ -50,11 +50,24 @@ func NewReader(r io.Reader) *Reader {
 }
 
 // NewReaderSize returns a new *Reader that
-// reads from 'r' and has a buffer size 'n'
+// reads from 'r' and has a buffer size 'n'.
 func NewReaderSize(r io.Reader, n int) *Reader {
+	buf := make([]byte, 0, max(n, minReaderSize))
+	return NewReaderBuf(r, buf)
+}
+
+// NewReaderBuf returns a new *Reader that
+// reads from 'r' and uses 'buf' as a buffer.
+// 'buf' is not used when has smaller capacity than 16,
+// custom buffer is allocated instead.
+func NewReaderBuf(r io.Reader, buf []byte) *Reader {
+	if cap(buf) < minReaderSize {
+		buf = make([]byte, 0, minReaderSize)
+	}
+	buf = buf[:0]
 	rd := &Reader{
 		r:    r,
-		data: make([]byte, 0, max(minReaderSize, n)),
+		data: buf,
 	}
 	if s, ok := r.(io.Seeker); ok {
 		rd.rs = s

vendor/github.com/philhofer/fwd/writer.go

@@ -29,16 +29,28 @@ func NewWriter(w io.Writer) *Writer {
 	}
 }
 
-// NewWriterSize returns a new writer
+// NewWriterSize returns a new writer that
-// that writes to 'w' and has a buffer
+// writes to 'w' and has a buffer size 'n'.
-// that is 'size' bytes.
+func NewWriterSize(w io.Writer, n int) *Writer {
-func NewWriterSize(w io.Writer, size int) *Writer {
+	if wr, ok := w.(*Writer); ok && cap(wr.buf) >= n {
-	if wr, ok := w.(*Writer); ok && cap(wr.buf) >= size {
 		return wr
 	}
+	buf := make([]byte, 0, max(n, minWriterSize))
+	return NewWriterBuf(w, buf)
+}
+
+// NewWriterBuf returns a new writer
+// that writes to 'w' and has 'buf' as a buffer.
+// 'buf' is not used when has smaller capacity than 18,
+// custom buffer is allocated instead.
+func NewWriterBuf(w io.Writer, buf []byte) *Writer {
+	if cap(buf) < minWriterSize {
+		buf = make([]byte, 0, minWriterSize)
+	}
+	buf = buf[:0]
 	return &Writer{
 		w:   w,
-		buf: make([]byte, 0, max(size, minWriterSize)),
+		buf: buf,
 	}
 }
 

vendor/github.com/pierrec/lz4/v3/debug.go

@@ -1,23 +0,0 @@
-// +build lz4debug
-
-package lz4
-
-import (
-	"fmt"
-	"os"
-	"path/filepath"
-	"runtime"
-)
-
-const debugFlag = true
-
-func debug(args ...interface{}) {
-	_, file, line, _ := runtime.Caller(1)
-	file = filepath.Base(file)
-
-	f := fmt.Sprintf("LZ4: %s:%d %s", file, line, args[0])
-	if f[len(f)-1] != '\n' {
-		f += "\n"
-	}
-	fmt.Fprintf(os.Stderr, f, args[1:]...)
-}

vendor/github.com/pierrec/lz4/v3/debug_stub.go

@@ -1,7 +0,0 @@
-// +build !lz4debug
-
-package lz4
-
-const debugFlag = false
-
-func debug(args ...interface{}) {}

vendor/github.com/pierrec/lz4/v3/errors.go

@@ -1,30 +0,0 @@
-package lz4
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	rdebug "runtime/debug"
-)
-
-var (
-	// ErrInvalidSourceShortBuffer is returned by UncompressBlock or CompressBLock when a compressed
-	// block is corrupted or the destination buffer is not large enough for the uncompressed data.
-	ErrInvalidSourceShortBuffer = errors.New("lz4: invalid source or destination buffer too short")
-	// ErrInvalid is returned when reading an invalid LZ4 archive.
-	ErrInvalid = errors.New("lz4: bad magic number")
-	// ErrBlockDependency is returned when attempting to decompress an archive created with block dependency.
-	ErrBlockDependency = errors.New("lz4: block dependency not supported")
-	// ErrUnsupportedSeek is returned when attempting to Seek any way but forward from the current position.
-	ErrUnsupportedSeek = errors.New("lz4: can only seek forward from io.SeekCurrent")
-)
-
-func recoverBlock(e *error) {
-	if r := recover(); r != nil && *e == nil {
-		if debugFlag {
-			fmt.Fprintln(os.Stderr, r)
-			rdebug.PrintStack()
-		}
-		*e = ErrInvalidSourceShortBuffer
-	}
-}

vendor/github.com/pierrec/lz4/v3/go.mod

@@ -1,12 +0,0 @@
-module github.com/pierrec/lz4/v3
-
-go 1.12
-
-require (
-	code.cloudfoundry.org/bytefmt v0.0.0-20190710193110-1eb035ffe2b6
-	github.com/frankban/quicktest v1.4.0
-	github.com/onsi/ginkgo v1.8.0 // indirect
-	github.com/onsi/gomega v1.5.0 // indirect
-	github.com/pierrec/cmdflag v0.0.2
-	github.com/schollz/progressbar/v2 v2.13.2
-)

vendor/github.com/pierrec/lz4/v3/go.sum

@@ -1,52 +0,0 @@
-code.cloudfoundry.org/bytefmt v0.0.0-20190710193110-1eb035ffe2b6 h1:tW+ztA4A9UT9xnco5wUjW1oNi35k22eUEn9tNpPYVwE=
-code.cloudfoundry.org/bytefmt v0.0.0-20190710193110-1eb035ffe2b6/go.mod h1:wN/zk7mhREp/oviagqUXY3EwuHhWyOvAdsn5Y4CzOrc=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/frankban/quicktest v1.4.0 h1:rCSCih1FnSWJEel/eub9wclBSqpF2F/PuvxUWGWnbO8=
-github.com/frankban/quicktest v1.4.0/go.mod h1:36zfPVQyHxymz4cH7wlDmVwDrJuljRB60qkgn7rorfQ=
-github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db h1:62I3jR2EmQ4l5rM/4FEfDWcRD+abF5XlKShorW5LRoQ=
-github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db/go.mod h1:l0dey0ia/Uv7NcFFVbCLtqEBQbrT4OCwCSKTEv6enCw=
-github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/ginkgo v1.8.0 h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=
-github.com/onsi/ginkgo v1.8.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/gomega v1.5.0 h1:izbySO9zDPmjJ8rDjLvkA2zJHIo+HkYXHnf7eN7SSyo=
-github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/pierrec/cmdflag v0.0.2 h1:ybjGJnPr/aURn2IKWjO49znx9N0DL6YfGsIxN0PYuVY=
-github.com/pierrec/cmdflag v0.0.2/go.mod h1:a3zKGZ3cdQUfxjd0RGMLZr8xI3nvpJOB+m6o/1X5BmU=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/schollz/progressbar/v2 v2.13.2 h1:3L9bP5KQOGEnFP8P5V8dz+U0yo5I29iY5Oa9s9EAwn0=
-github.com/schollz/progressbar/v2 v2.13.2/go.mod h1:6YZjqdthH6SCZKv2rqGryrxPtfmRB/DWZxSMfCXPyD8=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
-golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
-golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

vendor/github.com/pierrec/lz4/v3/lz4.go

@@ -1,113 +0,0 @@
-// Package lz4 implements reading and writing lz4 compressed data (a frame),
-// as specified in http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html.
-//
-// Although the block level compression and decompression functions are exposed and are fully compatible
-// with the lz4 block format definition, they are low level and should not be used directly.
-// For a complete description of an lz4 compressed block, see:
-// http://fastcompression.blogspot.fr/2011/05/lz4-explained.html
-//
-// See https://github.com/Cyan4973/lz4 for the reference C implementation.
-//
-package lz4
-
-import "math/bits"
-
-import "sync"
-
-const (
-	// Extension is the LZ4 frame file name extension
-	Extension = ".lz4"
-	// Version is the LZ4 frame format version
-	Version = 1
-
-	frameMagic     uint32 = 0x184D2204
-	frameSkipMagic uint32 = 0x184D2A50
-
-	// The following constants are used to setup the compression algorithm.
-	minMatch            = 4  // the minimum size of the match sequence size (4 bytes)
-	winSizeLog          = 16 // LZ4 64Kb window size limit
-	winSize             = 1 << winSizeLog
-	winMask             = winSize - 1 // 64Kb window of previous data for dependent blocks
-	compressedBlockFlag = 1 << 31
-	compressedBlockMask = compressedBlockFlag - 1
-
-	// hashLog determines the size of the hash table used to quickly find a previous match position.
-	// Its value influences the compression speed and memory usage, the lower the faster,
-	// but at the expense of the compression ratio.
-	// 16 seems to be the best compromise for fast compression.
-	hashLog = 16
-	htSize  = 1 << hashLog
-
-	mfLimit = 10 + minMatch // The last match cannot start within the last 14 bytes.
-)
-
-// map the block max size id with its value in bytes: 64Kb, 256Kb, 1Mb and 4Mb.
-const (
-	blockSize64K = 1 << (16 + 2*iota)
-	blockSize256K
-	blockSize1M
-	blockSize4M
-)
-
-var (
-	// Keep a pool of buffers for each valid block sizes.
-	bsMapValue = [...]*sync.Pool{
-		newBufferPool(2 * blockSize64K),
-		newBufferPool(2 * blockSize256K),
-		newBufferPool(2 * blockSize1M),
-		newBufferPool(2 * blockSize4M),
-	}
-)
-
-// newBufferPool returns a pool for buffers of the given size.
-func newBufferPool(size int) *sync.Pool {
-	return &sync.Pool{
-		New: func() interface{} {
-			return make([]byte, size)
-		},
-	}
-}
-
-// getBuffer returns a buffer to its pool.
-func getBuffer(size int) []byte {
-	idx := blockSizeValueToIndex(size) - 4
-	return bsMapValue[idx].Get().([]byte)
-}
-
-// putBuffer returns a buffer to its pool.
-func putBuffer(size int, buf []byte) {
-	if cap(buf) > 0 {
-		idx := blockSizeValueToIndex(size) - 4
-		bsMapValue[idx].Put(buf[:cap(buf)])
-	}
-}
-func blockSizeIndexToValue(i byte) int {
-	return 1 << (16 + 2*uint(i))
-}
-func isValidBlockSize(size int) bool {
-	const blockSizeMask = blockSize64K | blockSize256K | blockSize1M | blockSize4M
-
-	return size&blockSizeMask > 0 && bits.OnesCount(uint(size)) == 1
-}
-func blockSizeValueToIndex(size int) byte {
-	return 4 + byte(bits.TrailingZeros(uint(size)>>16)/2)
-}
-
-// Header describes the various flags that can be set on a Writer or obtained from a Reader.
-// The default values match those of the LZ4 frame format definition
-// (http://fastcompression.blogspot.com/2013/04/lz4-streaming-format-final.html).
-//
-// NB. in a Reader, in case of concatenated frames, the Header values may change between Read() calls.
-// It is the caller's responsibility to check them if necessary.
-type Header struct {
-	BlockChecksum    bool   // Compressed blocks checksum flag.
-	NoChecksum       bool   // Frame checksum flag.
-	BlockMaxSize     int    // Size of the uncompressed data block (one of [64KB, 256KB, 1MB, 4MB]). Default=4MB.
-	Size             uint64 // Frame total size. It is _not_ computed by the Writer.
-	CompressionLevel int    // Compression level (higher is better, use 0 for fastest compression).
-	done             bool   // Header processed flag (Read or Write and checked).
-}
-
-func (h *Header) Reset() {
-	h.done = false
-}

vendor/github.com/pierrec/lz4/v3/lz4_go1.10.go

@@ -1,29 +0,0 @@
-//+build go1.10
-
-package lz4
-
-import (
-	"fmt"
-	"strings"
-)
-
-func (h Header) String() string {
-	var s strings.Builder
-
-	s.WriteString(fmt.Sprintf("%T{", h))
-	if h.BlockChecksum {
-		s.WriteString("BlockChecksum: true ")
-	}
-	if h.NoChecksum {
-		s.WriteString("NoChecksum: true ")
-	}
-	if bs := h.BlockMaxSize; bs != 0 && bs != 4<<20 {
-		s.WriteString(fmt.Sprintf("BlockMaxSize: %d ", bs))
-	}
-	if l := h.CompressionLevel; l != 0 {
-		s.WriteString(fmt.Sprintf("CompressionLevel: %d ", l))
-	}
-	s.WriteByte('}')
-
-	return s.String()
-}

vendor/github.com/pierrec/lz4/v3/lz4_notgo1.10.go

@@ -1,29 +0,0 @@
-//+build !go1.10
-
-package lz4
-
-import (
-	"bytes"
-	"fmt"
-)
-
-func (h Header) String() string {
-	var s bytes.Buffer
-
-	s.WriteString(fmt.Sprintf("%T{", h))
-	if h.BlockChecksum {
-		s.WriteString("BlockChecksum: true ")
-	}
-	if h.NoChecksum {
-		s.WriteString("NoChecksum: true ")
-	}
-	if bs := h.BlockMaxSize; bs != 0 && bs != 4<<20 {
-		s.WriteString(fmt.Sprintf("BlockMaxSize: %d ", bs))
-	}
-	if l := h.CompressionLevel; l != 0 {
-		s.WriteString(fmt.Sprintf("CompressionLevel: %d ", l))
-	}
-	s.WriteByte('}')
-
-	return s.String()
-}

vendor/github.com/pierrec/lz4/v3/reader.go

@@ -1,335 +0,0 @@
-package lz4
-
-import (
-	"encoding/binary"
-	"fmt"
-	"io"
-	"io/ioutil"
-
-	"github.com/pierrec/lz4/v3/internal/xxh32"
-)
-
-// Reader implements the LZ4 frame decoder.
-// The Header is set after the first call to Read().
-// The Header may change between Read() calls in case of concatenated frames.
-type Reader struct {
-	Header
-	// Handler called when a block has been successfully read.
-	// It provides the number of bytes read.
-	OnBlockDone func(size int)
-
-	buf      [8]byte       // Scrap buffer.
-	pos      int64         // Current position in src.
-	src      io.Reader     // Source.
-	zdata    []byte        // Compressed data.
-	data     []byte        // Uncompressed data.
-	idx      int           // Index of unread bytes into data.
-	checksum xxh32.XXHZero // Frame hash.
-	skip     int64         // Bytes to skip before next read.
-	dpos     int64         // Position in dest
-}
-
-// NewReader returns a new LZ4 frame decoder.
-// No access to the underlying io.Reader is performed.
-func NewReader(src io.Reader) *Reader {
-	r := &Reader{src: src}
-	return r
-}
-
-// readHeader checks the frame magic number and parses the frame descriptoz.
-// Skippable frames are supported even as a first frame although the LZ4
-// specifications recommends skippable frames not to be used as first frames.
-func (z *Reader) readHeader(first bool) error {
-	defer z.checksum.Reset()
-
-	buf := z.buf[:]
-	for {
-		magic, err := z.readUint32()
-		if err != nil {
-			z.pos += 4
-			if !first && err == io.ErrUnexpectedEOF {
-				return io.EOF
-			}
-			return err
-		}
-		if magic == frameMagic {
-			break
-		}
-		if magic>>8 != frameSkipMagic>>8 {
-			return ErrInvalid
-		}
-		skipSize, err := z.readUint32()
-		if err != nil {
-			return err
-		}
-		z.pos += 4
-		m, err := io.CopyN(ioutil.Discard, z.src, int64(skipSize))
-		if err != nil {
-			return err
-		}
-		z.pos += m
-	}
-
-	// Header.
-	if _, err := io.ReadFull(z.src, buf[:2]); err != nil {
-		return err
-	}
-	z.pos += 8
-
-	b := buf[0]
-	if v := b >> 6; v != Version {
-		return fmt.Errorf("lz4: invalid version: got %d; expected %d", v, Version)
-	}
-	if b>>5&1 == 0 {
-		return ErrBlockDependency
-	}
-	z.BlockChecksum = b>>4&1 > 0
-	frameSize := b>>3&1 > 0
-	z.NoChecksum = b>>2&1 == 0
-
-	bmsID := buf[1] >> 4 & 0x7
-	if bmsID < 4 || bmsID > 7 {
-		return fmt.Errorf("lz4: invalid block max size ID: %d", bmsID)
-	}
-	bSize := blockSizeIndexToValue(bmsID - 4)
-	z.BlockMaxSize = bSize
-
-	// Allocate the compressed/uncompressed buffers.
-	// The compressed buffer cannot exceed the uncompressed one.
-	if n := 2 * bSize; cap(z.zdata) < n {
-		z.zdata = make([]byte, n, n)
-	}
-	if debugFlag {
-		debug("header block max size id=%d size=%d", bmsID, bSize)
-	}
-	z.zdata = z.zdata[:bSize]
-	z.data = z.zdata[:cap(z.zdata)][bSize:]
-	z.idx = len(z.data)
-
-	_, _ = z.checksum.Write(buf[0:2])
-
-	if frameSize {
-		buf := buf[:8]
-		if _, err := io.ReadFull(z.src, buf); err != nil {
-			return err
-		}
-		z.Size = binary.LittleEndian.Uint64(buf)
-		z.pos += 8
-		_, _ = z.checksum.Write(buf)
-	}
-
-	// Header checksum.
-	if _, err := io.ReadFull(z.src, buf[:1]); err != nil {
-		return err
-	}
-	z.pos++
-	if h := byte(z.checksum.Sum32() >> 8 & 0xFF); h != buf[0] {
-		return fmt.Errorf("lz4: invalid header checksum: got %x; expected %x", buf[0], h)
-	}
-
-	z.Header.done = true
-	if debugFlag {
-		debug("header read: %v", z.Header)
-	}
-
-	return nil
-}
-
-// Read decompresses data from the underlying source into the supplied buffer.
-//
-// Since there can be multiple streams concatenated, Header values may
-// change between calls to Read(). If that is the case, no data is actually read from
-// the underlying io.Reader, to allow for potential input buffer resizing.
-func (z *Reader) Read(buf []byte) (int, error) {
-	if debugFlag {
-		debug("Read buf len=%d", len(buf))
-	}
-	if !z.Header.done {
-		if err := z.readHeader(true); err != nil {
-			return 0, err
-		}
-		if debugFlag {
-			debug("header read OK compressed buffer %d / %d uncompressed buffer %d : %d index=%d",
-				len(z.zdata), cap(z.zdata), len(z.data), cap(z.data), z.idx)
-		}
-	}
-
-	if len(buf) == 0 {
-		return 0, nil
-	}
-
-	if z.idx == len(z.data) {
-		// No data ready for reading, process the next block.
-		if debugFlag {
-			debug("reading block from writer")
-		}
-		// Reset uncompressed buffer
-		z.data = z.zdata[:cap(z.zdata)][len(z.zdata):]
-
-		// Block length: 0 = end of frame, highest bit set: uncompressed.
-		bLen, err := z.readUint32()
-		if err != nil {
-			return 0, err
-		}
-		z.pos += 4
-
-		if bLen == 0 {
-			// End of frame reached.
-			if !z.NoChecksum {
-				// Validate the frame checksum.
-				checksum, err := z.readUint32()
-				if err != nil {
-					return 0, err
-				}
-				if debugFlag {
-					debug("frame checksum got=%x / want=%x", z.checksum.Sum32(), checksum)
-				}
-				z.pos += 4
-				if h := z.checksum.Sum32(); checksum != h {
-					return 0, fmt.Errorf("lz4: invalid frame checksum: got %x; expected %x", h, checksum)
-				}
-			}
-
-			// Get ready for the next concatenated frame and keep the position.
-			pos := z.pos
-			z.Reset(z.src)
-			z.pos = pos
-
-			// Since multiple frames can be concatenated, check for more.
-			return 0, z.readHeader(false)
-		}
-
-		if debugFlag {
-			debug("raw block size %d", bLen)
-		}
-		if bLen&compressedBlockFlag > 0 {
-			// Uncompressed block.
-			bLen &= compressedBlockMask
-			if debugFlag {
-				debug("uncompressed block size %d", bLen)
-			}
-			if int(bLen) > cap(z.data) {
-				return 0, fmt.Errorf("lz4: invalid block size: %d", bLen)
-			}
-			z.data = z.data[:bLen]
-			if _, err := io.ReadFull(z.src, z.data); err != nil {
-				return 0, err
-			}
-			z.pos += int64(bLen)
-			if z.OnBlockDone != nil {
-				z.OnBlockDone(int(bLen))
-			}
-
-			if z.BlockChecksum {
-				checksum, err := z.readUint32()
-				if err != nil {
-					return 0, err
-				}
-				z.pos += 4
-
-				if h := xxh32.ChecksumZero(z.data); h != checksum {
-					return 0, fmt.Errorf("lz4: invalid block checksum: got %x; expected %x", h, checksum)
-				}
-			}
-
-		} else {
-			// Compressed block.
-			if debugFlag {
-				debug("compressed block size %d", bLen)
-			}
-			if int(bLen) > cap(z.data) {
-				return 0, fmt.Errorf("lz4: invalid block size: %d", bLen)
-			}
-			zdata := z.zdata[:bLen]
-			if _, err := io.ReadFull(z.src, zdata); err != nil {
-				return 0, err
-			}
-			z.pos += int64(bLen)
-
-			if z.BlockChecksum {
-				checksum, err := z.readUint32()
-				if err != nil {
-					return 0, err
-				}
-				z.pos += 4
-
-				if h := xxh32.ChecksumZero(zdata); h != checksum {
-					return 0, fmt.Errorf("lz4: invalid block checksum: got %x; expected %x", h, checksum)
-				}
-			}
-
-			n, err := UncompressBlock(zdata, z.data)
-			if err != nil {
-				return 0, err
-			}
-			z.data = z.data[:n]
-			if z.OnBlockDone != nil {
-				z.OnBlockDone(n)
-			}
-		}
-
-		if !z.NoChecksum {
-			_, _ = z.checksum.Write(z.data)
-			if debugFlag {
-				debug("current frame checksum %x", z.checksum.Sum32())
-			}
-		}
-		z.idx = 0
-	}
-
-	if z.skip > int64(len(z.data[z.idx:])) {
-		z.skip -= int64(len(z.data[z.idx:]))
-		z.dpos += int64(len(z.data[z.idx:]))
-		z.idx = len(z.data)
-		return 0, nil
-	}
-
-	z.idx += int(z.skip)
-	z.dpos += z.skip
-	z.skip = 0
-
-	n := copy(buf, z.data[z.idx:])
-	z.idx += n
-	z.dpos += int64(n)
-	if debugFlag {
-		debug("copied %d bytes to input", n)
-	}
-
-	return n, nil
-}
-
-// Seek implements io.Seeker, but supports seeking forward from the current
-// position only. Any other seek will return an error. Allows skipping output
-// bytes which aren't needed, which in some scenarios is faster than reading
-// and discarding them.
-// Note this may cause future calls to Read() to read 0 bytes if all of the
-// data they would have returned is skipped.
-func (z *Reader) Seek(offset int64, whence int) (int64, error) {
-	if offset < 0 || whence != io.SeekCurrent {
-		return z.dpos + z.skip, ErrUnsupportedSeek
-	}
-	z.skip += offset
-	return z.dpos + z.skip, nil
-}
-
-// Reset discards the Reader's state and makes it equivalent to the
-// result of its original state from NewReader, but reading from r instead.
-// This permits reusing a Reader rather than allocating a new one.
-func (z *Reader) Reset(r io.Reader) {
-	z.Header = Header{}
-	z.pos = 0
-	z.src = r
-	z.zdata = z.zdata[:0]
-	z.data = z.data[:0]
-	z.idx = 0
-	z.checksum.Reset()
-}
-
-// readUint32 reads an uint32 into the supplied buffer.
-// The idea is to make use of the already allocated buffers avoiding additional allocations.
-func (z *Reader) readUint32() (uint32, error) {
-	buf := z.buf[:4]
-	_, err := io.ReadFull(z.src, buf)
-	x := binary.LittleEndian.Uint32(buf)
-	return x, err
-}

vendor/github.com/pierrec/lz4/v3/writer.go

@@ -1,409 +0,0 @@
-package lz4
-
-import (
-	"encoding/binary"
-	"fmt"
-	"io"
-	"runtime"
-
-	"github.com/pierrec/lz4/v3/internal/xxh32"
-)
-
-// zResult contains the results of compressing a block.
-type zResult struct {
-	size     uint32 // Block header
-	data     []byte // Compressed data
-	checksum uint32 // Data checksum
-}
-
-// Writer implements the LZ4 frame encoder.
-type Writer struct {
-	Header
-	// Handler called when a block has been successfully written out.
-	// It provides the number of bytes written.
-	OnBlockDone func(size int)
-
-	buf       [19]byte      // magic number(4) + header(flags(2)+[Size(8)+DictID(4)]+checksum(1)) does not exceed 19 bytes
-	dst       io.Writer     // Destination.
-	checksum  xxh32.XXHZero // Frame checksum.
-	data      []byte        // Data to be compressed + buffer for compressed data.
-	idx       int           // Index into data.
-	hashtable [winSize]int  // Hash table used in CompressBlock().
-
-	// For concurrency.
-	c   chan chan zResult // Channel for block compression goroutines and writer goroutine.
-	err error             // Any error encountered while writing to the underlying destination.
-}
-
-// NewWriter returns a new LZ4 frame encoder.
-// No access to the underlying io.Writer is performed.
-// The supplied Header is checked at the first Write.
-// It is ok to change it before the first Write but then not until a Reset() is performed.
-func NewWriter(dst io.Writer) *Writer {
-	z := new(Writer)
-	z.Reset(dst)
-	return z
-}
-
-// WithConcurrency sets the number of concurrent go routines used for compression.
-// A negative value sets the concurrency to GOMAXPROCS.
-func (z *Writer) WithConcurrency(n int) *Writer {
-	switch {
-	case n == 0 || n == 1:
-		z.c = nil
-		return z
-	case n < 0:
-		n = runtime.GOMAXPROCS(0)
-	}
-	z.c = make(chan chan zResult, n)
-	// Writer goroutine managing concurrent block compression goroutines.
-	go func() {
-		// Process next block compression item.
-		for c := range z.c {
-			// Read the next compressed block result.
-			// Waiting here ensures that the blocks are output in the order they were sent.
-			// The incoming channel is always closed as it indicates to the caller that
-			// the block has been processed.
-			res := <-c
-			n := len(res.data)
-			if n == 0 {
-				// Notify the block compression routine that we are done with its result.
-				// This is used when a sentinel block is sent to terminate the compression.
-				close(c)
-				return
-			}
-			// Write the block.
-			if err := z.writeUint32(res.size); err != nil && z.err == nil {
-				z.err = err
-			}
-			if _, err := z.dst.Write(res.data); err != nil && z.err == nil {
-				z.err = err
-			}
-			if z.BlockChecksum {
-				if err := z.writeUint32(res.checksum); err != nil && z.err == nil {
-					z.err = err
-				}
-			}
-			if isCompressed := res.size&compressedBlockFlag == 0; isCompressed {
-				// It is now safe to release the buffer as no longer in use by any goroutine.
-				putBuffer(cap(res.data), res.data)
-			}
-			if h := z.OnBlockDone; h != nil {
-				h(n)
-			}
-			close(c)
-		}
-	}()
-	return z
-}
-
-// newBuffers instantiates new buffers which size matches the one in Header.
-// The returned buffers are for decompression and compression respectively.
-func (z *Writer) newBuffers() {
-	bSize := z.Header.BlockMaxSize
-	buf := getBuffer(bSize)
-	z.data = buf[:bSize] // Uncompressed buffer is the first half.
-}
-
-// freeBuffers puts the writer's buffers back to the pool.
-func (z *Writer) freeBuffers() {
-	// Put the buffer back into the pool, if any.
-	putBuffer(z.Header.BlockMaxSize, z.data)
-	z.data = nil
-}
-
-// writeHeader builds and writes the header (magic+header) to the underlying io.Writer.
-func (z *Writer) writeHeader() error {
-	// Default to 4Mb if BlockMaxSize is not set.
-	if z.Header.BlockMaxSize == 0 {
-		z.Header.BlockMaxSize = blockSize4M
-	}
-	// The only option that needs to be validated.
-	bSize := z.Header.BlockMaxSize
-	if !isValidBlockSize(z.Header.BlockMaxSize) {
-		return fmt.Errorf("lz4: invalid block max size: %d", bSize)
-	}
-	// Allocate the compressed/uncompressed buffers.
-	// The compressed buffer cannot exceed the uncompressed one.
-	z.newBuffers()
-	z.idx = 0
-
-	// Size is optional.
-	buf := z.buf[:]
-
-	// Set the fixed size data: magic number, block max size and flags.
-	binary.LittleEndian.PutUint32(buf[0:], frameMagic)
-	flg := byte(Version << 6)
-	flg |= 1 << 5 // No block dependency.
-	if z.Header.BlockChecksum {
-		flg |= 1 << 4
-	}
-	if z.Header.Size > 0 {
-		flg |= 1 << 3
-	}
-	if !z.Header.NoChecksum {
-		flg |= 1 << 2
-	}
-	buf[4] = flg
-	buf[5] = blockSizeValueToIndex(z.Header.BlockMaxSize) << 4
-
-	// Current buffer size: magic(4) + flags(1) + block max size (1).
-	n := 6
-	// Optional items.
-	if z.Header.Size > 0 {
-		binary.LittleEndian.PutUint64(buf[n:], z.Header.Size)
-		n += 8
-	}
-
-	// The header checksum includes the flags, block max size and optional Size.
-	buf[n] = byte(xxh32.ChecksumZero(buf[4:n]) >> 8 & 0xFF)
-	z.checksum.Reset()
-
-	// Header ready, write it out.
-	if _, err := z.dst.Write(buf[0 : n+1]); err != nil {
-		return err
-	}
-	z.Header.done = true
-	if debugFlag {
-		debug("wrote header %v", z.Header)
-	}
-
-	return nil
-}
-
-// Write compresses data from the supplied buffer into the underlying io.Writer.
-// Write does not return until the data has been written.
-func (z *Writer) Write(buf []byte) (int, error) {
-	if !z.Header.done {
-		if err := z.writeHeader(); err != nil {
-			return 0, err
-		}
-	}
-	if debugFlag {
-		debug("input buffer len=%d index=%d", len(buf), z.idx)
-	}
-
-	zn := len(z.data)
-	var n int
-	for len(buf) > 0 {
-		if z.idx == 0 && len(buf) >= zn {
-			// Avoid a copy as there is enough data for a block.
-			if err := z.compressBlock(buf[:zn]); err != nil {
-				return n, err
-			}
-			n += zn
-			buf = buf[zn:]
-			continue
-		}
-		// Accumulate the data to be compressed.
-		m := copy(z.data[z.idx:], buf)
-		n += m
-		z.idx += m
-		buf = buf[m:]
-		if debugFlag {
-			debug("%d bytes copied to buf, current index %d", n, z.idx)
-		}
-
-		if z.idx < len(z.data) {
-			// Buffer not filled.
-			if debugFlag {
-				debug("need more data for compression")
-			}
-			return n, nil
-		}
-
-		// Buffer full.
-		if err := z.compressBlock(z.data); err != nil {
-			return n, err
-		}
-		z.idx = 0
-	}
-
-	return n, nil
-}
-
-// compressBlock compresses a block.
-func (z *Writer) compressBlock(data []byte) error {
-	if !z.NoChecksum {
-		_, _ = z.checksum.Write(data)
-	}
-
-	if z.c != nil {
-		c := make(chan zResult)
-		z.c <- c // Send now to guarantee order
-		go writerCompressBlock(c, z.Header, data)
-		return nil
-	}
-
-	zdata := z.data[z.Header.BlockMaxSize:cap(z.data)]
-	// The compressed block size cannot exceed the input's.
-	var zn int
-
-	if level := z.Header.CompressionLevel; level != 0 {
-		zn, _ = CompressBlockHC(data, zdata, level)
-	} else {
-		zn, _ = CompressBlock(data, zdata, z.hashtable[:])
-	}
-
-	var bLen uint32
-	if debugFlag {
-		debug("block compression %d => %d", len(data), zn)
-	}
-	if zn > 0 && zn < len(data) {
-		// Compressible and compressed size smaller than uncompressed: ok!
-		bLen = uint32(zn)
-		zdata = zdata[:zn]
-	} else {
-		// Uncompressed block.
-		bLen = uint32(len(data)) | compressedBlockFlag
-		zdata = data
-	}
-	if debugFlag {
-		debug("block compression to be written len=%d data len=%d", bLen, len(zdata))
-	}
-
-	// Write the block.
-	if err := z.writeUint32(bLen); err != nil {
-		return err
-	}
-	written, err := z.dst.Write(zdata)
-	if err != nil {
-		return err
-	}
-	if h := z.OnBlockDone; h != nil {
-		h(written)
-	}
-
-	if !z.BlockChecksum {
-		if debugFlag {
-			debug("current frame checksum %x", z.checksum.Sum32())
-		}
-		return nil
-	}
-	checksum := xxh32.ChecksumZero(zdata)
-	if debugFlag {
-		debug("block checksum %x", checksum)
-		defer func() { debug("current frame checksum %x", z.checksum.Sum32()) }()
-	}
-	return z.writeUint32(checksum)
-}
-
-// Flush flushes any pending compressed data to the underlying writer.
-// Flush does not return until the data has been written.
-// If the underlying writer returns an error, Flush returns that error.
-func (z *Writer) Flush() error {
-	if debugFlag {
-		debug("flush with index %d", z.idx)
-	}
-	if z.idx == 0 {
-		return nil
-	}
-
-	data := z.data[:z.idx]
-	z.idx = 0
-	if z.c == nil {
-		return z.compressBlock(data)
-	}
-	if !z.NoChecksum {
-		_, _ = z.checksum.Write(data)
-	}
-	c := make(chan zResult)
-	z.c <- c
-	writerCompressBlock(c, z.Header, data)
-	return nil
-}
-
-func (z *Writer) close() error {
-	if z.c == nil {
-		return nil
-	}
-	// Send a sentinel block (no data to compress) to terminate the writer main goroutine.
-	c := make(chan zResult)
-	z.c <- c
-	c <- zResult{}
-	// Wait for the main goroutine to complete.
-	<-c
-	// At this point the main goroutine has shut down or is about to return.
-	z.c = nil
-	return z.err
-}
-
-// Close closes the Writer, flushing any unwritten data to the underlying io.Writer, but does not close the underlying io.Writer.
-func (z *Writer) Close() error {
-	if !z.Header.done {
-		if err := z.writeHeader(); err != nil {
-			return err
-		}
-	}
-	if err := z.Flush(); err != nil {
-		return err
-	}
-	if err := z.close(); err != nil {
-		return err
-	}
-	z.freeBuffers()
-
-	if debugFlag {
-		debug("writing last empty block")
-	}
-	if err := z.writeUint32(0); err != nil {
-		return err
-	}
-	if z.NoChecksum {
-		return nil
-	}
-	checksum := z.checksum.Sum32()
-	if debugFlag {
-		debug("stream checksum %x", checksum)
-	}
-	return z.writeUint32(checksum)
-}
-
-// Reset clears the state of the Writer z such that it is equivalent to its
-// initial state from NewWriter, but instead writing to w.
-// No access to the underlying io.Writer is performed.
-func (z *Writer) Reset(w io.Writer) {
-	n := cap(z.c)
-	_ = z.close()
-	z.freeBuffers()
-	z.Header.Reset()
-	z.dst = w
-	z.checksum.Reset()
-	z.idx = 0
-	z.err = nil
-	z.WithConcurrency(n)
-}
-
-// writeUint32 writes a uint32 to the underlying writer.
-func (z *Writer) writeUint32(x uint32) error {
-	buf := z.buf[:4]
-	binary.LittleEndian.PutUint32(buf, x)
-	_, err := z.dst.Write(buf)
-	return err
-}
-
-// writerCompressBlock compresses data into a pooled buffer and writes its result
-// out to the input channel.
-func writerCompressBlock(c chan zResult, header Header, data []byte) {
-	zdata := getBuffer(header.BlockMaxSize)
-	// The compressed block size cannot exceed the input's.
-	var zn int
-	if level := header.CompressionLevel; level != 0 {
-		zn, _ = CompressBlockHC(data, zdata, level)
-	} else {
-		var hashTable [winSize]int
-		zn, _ = CompressBlock(data, zdata, hashTable[:])
-	}
-	var res zResult
-	if zn > 0 && zn < len(data) {
-		res.size = uint32(zn)
-		res.data = zdata[:zn]
-	} else {
-		res.size = uint32(len(data)) | compressedBlockFlag
-		res.data = data
-	}
-	if header.BlockChecksum {
-		res.checksum = xxh32.ChecksumZero(res.data)
-	}
-	c <- res
-}

vendor/github.com/pierrec/lz4/v4/.travis.yml

@@ -1,19 +1,14 @@
 language: go
 
 env:
-  - GO111MODULE=on
+  - GO111MODULE=off
 
 go:
-  - 1.9.x
+  - 1.13.x
-  - 1.10.x
+  - 1.14.x
-  - 1.11.x
-  - 1.12.x
-  - master
 
 matrix:
  fast_finish: true
- allow_failures:
-   - go: master
 
 sudo: false
 

vendor/github.com/pierrec/lz4/v4/README.md

@@ -15,7 +15,7 @@ The implementation is based on the reference C [one](https://github.com/lz4/lz4)
 Assuming you have the go toolchain installed:
 
 ```
-go get github.com/pierrec/lz4/v3
+go get github.com/pierrec/lz4
 ```
 
 There is a command line interface tool to compress and decompress LZ4 files.

vendor/github.com/pierrec/lz4/v4/go.mod

@@ -0,0 +1,3 @@
+module github.com/pierrec/lz4/v4
+
+go 1.14

vendor/github.com/pierrec/lz4/v4/go.sum

@@ -0,0 +1,3 @@
+github.com/pierrec/lz4 v1.0.1 h1:w6GMGWSsCI04fTM8wQRdnW74MuJISakuUU0onU0TYB4=
+github.com/pierrec/lz4 v2.6.0+incompatible h1:Ix9yFKn1nSPBLFl/yZknTp8TU5G4Ps0JDmguYK6iH1A=
+github.com/pierrec/lz4 v2.6.0+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=

vendor/github.com/pierrec/lz4/v4/internal/lz4block/block.go

@@ -1,28 +1,46 @@
-package lz4
+package lz4block
 
 import (
 	"encoding/binary"
 	"math/bits"
 	"sync"
+
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
 )
 
+const (
+	// The following constants are used to setup the compression algorithm.
+	minMatch   = 4  // the minimum size of the match sequence size (4 bytes)
+	winSizeLog = 16 // LZ4 64Kb window size limit
+	winSize    = 1 << winSizeLog
+	winMask    = winSize - 1 // 64Kb window of previous data for dependent blocks
+
+	// hashLog determines the size of the hash table used to quickly find a previous match position.
+	// Its value influences the compression speed and memory usage, the lower the faster,
+	// but at the expense of the compression ratio.
+	// 16 seems to be the best compromise for fast compression.
+	hashLog = 16
+	htSize  = 1 << hashLog
+
+	mfLimit = 10 + minMatch // The last match cannot start within the last 14 bytes.
+)
+
+func recoverBlock(e *error) {
+	if r := recover(); r != nil && *e == nil {
+		*e = lz4errors.ErrInvalidSourceShortBuffer
+	}
+}
+
 // blockHash hashes the lower 6 bytes into a value < htSize.
 func blockHash(x uint64) uint32 {
 	const prime6bytes = 227718039650203
 	return uint32(((x << (64 - 48)) * prime6bytes) >> (64 - hashLog))
 }
 
-// CompressBlockBound returns the maximum size of a given buffer of size n, when not compressible.
 func CompressBlockBound(n int) int {
 	return n + n/255 + 16
 }
 
-// UncompressBlock uncompresses the source buffer into the destination one,
-// and returns the uncompressed size.
-//
-// The destination buffer must be sized appropriately.
-//
-// An error is returned if the source data is invalid or the destination buffer is too small.
 func UncompressBlock(src, dst []byte) (int, error) {
 	if len(src) == 0 {
 		return 0, nil
@@ -30,24 +48,57 @@ func UncompressBlock(src, dst []byte) (int, error) {
 	if di := decodeBlock(dst, src); di >= 0 {
 		return di, nil
 	}
-	return 0, ErrInvalidSourceShortBuffer
+	return 0, lz4errors.ErrInvalidSourceShortBuffer
 }
 
-// CompressBlock compresses the source buffer into the destination one.
+type Compressor struct {
-// This is the fast version of LZ4 compression and also the default one.
+	// Offsets are at most 64kiB, so we can store only the lower 16 bits of
-//
+	// match positions: effectively, an offset from some 64kiB block boundary.
-// The argument hashTable is scratch space for a hash table used by the
+	//
-// compressor. If provided, it should have length at least 1<<16. If it is
+	// When we retrieve such an offset, we interpret it as relative to the last
-// shorter (or nil), CompressBlock allocates its own hash table.
+	// block boundary si &^ 0xffff, or the one before, (si &^ 0xffff) - 0x10000,
-//
+	// depending on which of these is inside the current window. If a table
-// The size of the compressed data is returned.
+	// entry was generated more than 64kiB back in the input, we find out by
-//
+	// inspecting the input stream.
-// If the destination buffer size is lower than CompressBlockBound and
+	table [htSize]uint16
-// the compressed size is 0 and no error, then the data is incompressible.
+
-//
+	needsReset bool
-// An error is returned if the destination buffer is too small.
+}
-func CompressBlock(src, dst []byte, hashTable []int) (_ int, err error) {
+
-	defer recoverBlock(&err)
+// Get returns the position of a presumptive match for the hash h.
+// The match may be a false positive due to a hash collision or an old entry.
+// If si < winSize, the return value may be negative.
+func (c *Compressor) get(h uint32, si int) int {
+	h &= htSize - 1
+	i := int(c.table[h])
+	i += si &^ winMask
+	if i >= si {
+		// Try previous 64kiB block (negative when in first block).
+		i -= winSize
+	}
+	return i
+}
+
+func (c *Compressor) put(h uint32, si int) {
+	h &= htSize - 1
+	c.table[h] = uint16(si)
+}
+
+var compressorPool = sync.Pool{New: func() interface{} { return new(Compressor) }}
+
+func CompressBlock(src, dst []byte) (int, error) {
+	c := compressorPool.Get().(*Compressor)
+	n, err := c.CompressBlock(src, dst)
+	compressorPool.Put(c)
+	return n, err
+}
+
+func (c *Compressor) CompressBlock(src, dst []byte) (int, error) {
+	if c.needsReset {
+		// Zero out reused table to avoid non-deterministic output (issue #65).
+		c.table = [htSize]uint16{}
+	}
+	c.needsReset = true // Only false on first call.
 
 	// Return 0, nil only if the destination buffer size is < CompressBlockBound.
 	isNotCompressible := len(dst) < CompressBlockBound(len(src))
@@ -56,14 +107,6 @@ func CompressBlock(src, dst []byte, hashTable []int) (_ int, err error) {
 	// This significantly speeds up incompressible data and usually has very small impact on compression.
 	// bytes to skip =  1 + (bytes since last match >> adaptSkipLog)
 	const adaptSkipLog = 7
-	if len(hashTable) < htSize {
-		htIface := htPool.Get()
-		defer htPool.Put(htIface)
-		hashTable = (*(htIface).(*[htSize]int))[:]
-	}
-	// Prove to the compiler the table has at least htSize elements.
-	// The compiler can see that "uint32() >> hashShift" cannot be out of bounds.
-	hashTable = hashTable[:htSize]
 
 	// si: Current position of the search.
 	// anchor: Position of the current literals.
@@ -82,33 +125,30 @@ func CompressBlock(src, dst []byte, hashTable []int) (_ int, err error) {
 
 		// We check a match at s, s+1 and s+2 and pick the first one we get.
 		// Checking 3 only requires us to load the source one.
-		ref := hashTable[h]
+		ref := c.get(h, si)
-		ref2 := hashTable[h2]
+		ref2 := c.get(h2, si)
-		hashTable[h] = si
+		c.put(h, si)
-		hashTable[h2] = si + 1
+		c.put(h2, si+1)
+
 		offset := si - ref
 
-		// If offset <= 0 we got an old entry in the hash table.
+		if offset <= 0 || offset >= winSize || uint32(match) != binary.LittleEndian.Uint32(src[ref:]) {
-		if offset <= 0 || offset >= winSize || // Out of window.
-			uint32(match) != binary.LittleEndian.Uint32(src[ref:]) { // Hash collision on different matches.
 			// No match. Start calculating another hash.
 			// The processor can usually do this out-of-order.
 			h = blockHash(match >> 16)
-			ref = hashTable[h]
+			ref3 := c.get(h, si+2)
 
 			// Check the second match at si+1
 			si += 1
 			offset = si - ref2
 
-			if offset <= 0 || offset >= winSize ||
+			if offset <= 0 || offset >= winSize || uint32(match>>8) != binary.LittleEndian.Uint32(src[ref2:]) {
-				uint32(match>>8) != binary.LittleEndian.Uint32(src[ref2:]) {
 				// No match. Check the third match at si+2
 				si += 1
-				offset = si - ref
+				offset = si - ref3
-				hashTable[h] = si
+				c.put(h, si)
 
-				if offset <= 0 || offset >= winSize ||
+				if offset <= 0 || offset >= winSize || uint32(match>>16) != binary.LittleEndian.Uint32(src[ref3:]) {
-					uint32(match>>16) != binary.LittleEndian.Uint32(src[ref:]) {
 					// Skip one extra byte (at si+3) before we check 3 matches again.
 					si += 2 + (si-anchor)>>adaptSkipLog
 					continue
@@ -169,20 +209,28 @@ func CompressBlock(src, dst []byte, hashTable []int) (_ int, err error) {
 		di++
 
 		// Literals.
+		if di+lLen > len(dst) {
+			return 0, lz4errors.ErrInvalidSourceShortBuffer
+		}
 		copy(dst[di:di+lLen], src[anchor:anchor+lLen])
 		di += lLen + 2
 		anchor = si
 
 		// Encode offset.
-		_ = dst[di] // Bound check elimination.
+		if di > len(dst) {
+			return 0, lz4errors.ErrInvalidSourceShortBuffer
+		}
 		dst[di-2], dst[di-1] = byte(offset), byte(offset>>8)
 
 		// Encode match length part 2.
 		if mLen >= 0xF {
-			for mLen -= 0xF; mLen >= 0xFF; mLen -= 0xFF {
+			for mLen -= 0xF; mLen >= 0xFF && di < len(dst); mLen -= 0xFF {
 				dst[di] = 0xFF
 				di++
 			}
+			if di >= len(dst) {
+				return 0, lz4errors.ErrInvalidSourceShortBuffer
+			}
 			dst[di] = byte(mLen)
 			di++
 		}
@@ -192,7 +240,7 @@ func CompressBlock(src, dst []byte, hashTable []int) (_ int, err error) {
 		}
 		// Hash match end-2
 		h = blockHash(binary.LittleEndian.Uint64(src[si-2:]))
-		hashTable[h] = si - 2
+		c.put(h, si-2)
 	}
 
 lastLiterals:
@@ -202,16 +250,22 @@ lastLiterals:
 	}
 
 	// Last literals.
+	if di >= len(dst) {
+		return 0, lz4errors.ErrInvalidSourceShortBuffer
+	}
 	lLen := len(src) - anchor
 	if lLen < 0xF {
 		dst[di] = byte(lLen << 4)
 	} else {
 		dst[di] = 0xF0
 		di++
-		for lLen -= 0xF; lLen >= 0xFF; lLen -= 0xFF {
+		for lLen -= 0xF; lLen >= 0xFF && di < len(dst); lLen -= 0xFF {
 			dst[di] = 0xFF
 			di++
 		}
+		if di >= len(dst) {
+			return 0, lz4errors.ErrInvalidSourceShortBuffer
+		}
 		dst[di] = byte(lLen)
 	}
 	di++
@@ -221,35 +275,43 @@ lastLiterals:
 		// Incompressible.
 		return 0, nil
 	}
+	if di+len(src)-anchor > len(dst) {
+		return 0, lz4errors.ErrInvalidSourceShortBuffer
+	}
 	di += copy(dst[di:di+len(src)-anchor], src[anchor:])
 	return di, nil
 }
 
-// Pool of hash tables for CompressBlock.
-var htPool = sync.Pool{
-	New: func() interface{} {
-		return new([htSize]int)
-	},
-}
-
 // blockHash hashes 4 bytes into a value < winSize.
 func blockHashHC(x uint32) uint32 {
 	const hasher uint32 = 2654435761 // Knuth multiplicative hash.
 	return x * hasher >> (32 - winSizeLog)
 }
 
-// CompressBlockHC compresses the source buffer src into the destination dst
+type CompressorHC struct {
-// with max search depth (use 0 or negative value for no max).
+	// hashTable: stores the last position found for a given hash
-//
+	// chainTable: stores previous positions for a given hash
-// CompressBlockHC compression ratio is better than CompressBlock but it is also slower.
+	hashTable, chainTable [htSize]int
-//
+	needsReset            bool
-// The size of the compressed data is returned.
+}
-//
+
-// If the destination buffer size is lower than CompressBlockBound and
+var compressorHCPool = sync.Pool{New: func() interface{} { return new(CompressorHC) }}
-// the compressed size is 0 and no error, then the data is incompressible.
+
-//
+func CompressBlockHC(src, dst []byte, depth CompressionLevel) (int, error) {
-// An error is returned if the destination buffer is too small.
+	c := compressorHCPool.Get().(*CompressorHC)
-func CompressBlockHC(src, dst []byte, depth int) (_ int, err error) {
+	n, err := c.CompressBlock(src, dst, depth)
+	compressorHCPool.Put(c)
+	return n, err
+}
+
+func (c *CompressorHC) CompressBlock(src, dst []byte, depth CompressionLevel) (_ int, err error) {
+	if c.needsReset {
+		// Zero out reused table to avoid non-deterministic output (issue #65).
+		c.hashTable = [htSize]int{}
+		c.chainTable = [htSize]int{}
+	}
+	c.needsReset = true // Only false on first call.
+
 	defer recoverBlock(&err)
 
 	// Return 0, nil only if the destination buffer size is < CompressBlockBound.
@@ -261,20 +323,15 @@ func CompressBlockHC(src, dst []byte, depth int) (_ int, err error) {
 	const adaptSkipLog = 7
 
 	var si, di, anchor int
-
-	// hashTable: stores the last position found for a given hash
-	// chainTable: stores previous positions for a given hash
-	var hashTable, chainTable [winSize]int
-
-	if depth <= 0 {
-		depth = winSize
-	}
-
 	sn := len(src) - mfLimit
 	if sn <= 0 {
 		goto lastLiterals
 	}
 
+	if depth == 0 {
+		depth = winSize
+	}
+
 	for si < sn {
 		// Hash the next 4 bytes (sequence).
 		match := binary.LittleEndian.Uint32(src[si:])
@@ -283,7 +340,7 @@ func CompressBlockHC(src, dst []byte, depth int) (_ int, err error) {
 		// Follow the chain until out of window and give the longest match.
 		mLen := 0
 		offset := 0
-		for next, try := hashTable[h], depth; try > 0 && next > 0 && si-next < winSize; next = chainTable[next&winMask] {
+		for next, try := c.hashTable[h], depth; try > 0 && next > 0 && si-next < winSize; next, try = c.chainTable[next&winMask], try-1 {
 			// The first (mLen==0) or next byte (mLen>=minMatch) at current match length
 			// must match to improve on the match length.
 			if src[next+mLen] != src[si+mLen] {
@@ -309,10 +366,9 @@ func CompressBlockHC(src, dst []byte, depth int) (_ int, err error) {
 			mLen = ml
 			offset = si - next
 			// Try another previous position with the same hash.
-			try--
 		}
-		chainTable[si&winMask] = hashTable[h]
+		c.chainTable[si&winMask] = c.hashTable[h]
-		hashTable[h] = si
+		c.hashTable[h] = si
 
 		// No match found.
 		if mLen == 0 {
@@ -331,8 +387,8 @@ func CompressBlockHC(src, dst []byte, depth int) (_ int, err error) {
 			match >>= 8
 			match |= uint32(src[si+3]) << 24
 			h := blockHashHC(match)
-			chainTable[si&winMask] = hashTable[h]
+			c.chainTable[si&winMask] = c.hashTable[h]
-			hashTable[h] = si
+			c.hashTable[h] = si
 			si++
 		}
 

vendor/github.com/pierrec/lz4/v4/internal/lz4block/blocks.go

@@ -0,0 +1,88 @@
+// Package lz4block provides LZ4 BlockSize types and pools of buffers.
+package lz4block
+
+import "sync"
+
+const (
+	Block64Kb uint32 = 1 << (16 + iota*2)
+	Block256Kb
+	Block1Mb
+	Block4Mb
+	Block8Mb        = 2 * Block4Mb
+	legacyBlockSize = Block8Mb + Block8Mb/255 + 16 // CompressBound(Block8Mb)
+)
+
+var (
+	BlockPool64K  = sync.Pool{New: func() interface{} { return make([]byte, Block64Kb) }}
+	BlockPool256K = sync.Pool{New: func() interface{} { return make([]byte, Block256Kb) }}
+	BlockPool1M   = sync.Pool{New: func() interface{} { return make([]byte, Block1Mb) }}
+	BlockPool4M   = sync.Pool{New: func() interface{} { return make([]byte, Block4Mb) }}
+	BlockPool8M   = sync.Pool{New: func() interface{} { return make([]byte, legacyBlockSize) }}
+)
+
+func Index(b uint32) BlockSizeIndex {
+	switch b {
+	case Block64Kb:
+		return 4
+	case Block256Kb:
+		return 5
+	case Block1Mb:
+		return 6
+	case Block4Mb:
+		return 7
+	case Block8Mb: // only valid in legacy mode
+		return 3
+	}
+	return 0
+}
+
+func IsValid(b uint32) bool {
+	return Index(b) > 0
+}
+
+type BlockSizeIndex uint8
+
+func (b BlockSizeIndex) IsValid() bool {
+	switch b {
+	case 4, 5, 6, 7:
+		return true
+	}
+	return false
+}
+
+func (b BlockSizeIndex) Get() []byte {
+	var buf interface{}
+	switch b {
+	case 4:
+		buf = BlockPool64K.Get()
+	case 5:
+		buf = BlockPool256K.Get()
+	case 6:
+		buf = BlockPool1M.Get()
+	case 7:
+		buf = BlockPool4M.Get()
+	case 3:
+		buf = BlockPool8M.Get()
+	}
+	return buf.([]byte)
+}
+
+func Put(buf []byte) {
+	// Safeguard: do not allow invalid buffers.
+	switch c := cap(buf); uint32(c) {
+	case Block64Kb:
+		BlockPool64K.Put(buf[:c])
+	case Block256Kb:
+		BlockPool256K.Put(buf[:c])
+	case Block1Mb:
+		BlockPool1M.Put(buf[:c])
+	case Block4Mb:
+		BlockPool4M.Put(buf[:c])
+	case legacyBlockSize:
+		BlockPool8M.Put(buf[:c])
+	}
+}
+
+type CompressionLevel uint32
+
+const Fast CompressionLevel = 0

vendor/github.com/pierrec/lz4/v4/internal/lz4block/decode_amd64.s

@@ -26,6 +26,8 @@ TEXT ·decodeBlock(SB), NOSPLIT, $64-56
 
 	MOVQ src_base+24(FP), SI
 	MOVQ src_len+32(FP), R9
+	CMPQ R9, $0
+	JE   err_corrupt
 	ADDQ SI, R9
 
 	// shortcut ends
@@ -109,8 +111,7 @@ loop:
 	MOVW 16(AX), BX
 	MOVW BX, 16(DI)
 
-	ADDQ $4, DI // minmatch
+	LEAQ 4(DI)(CX*1), DI // minmatch
-	ADDQ CX, DI
 
 	// shortcut complete, load next token
 	JMP loop
@@ -128,8 +129,7 @@ lit_len_loop:
 	JNE lit_len_finalise
 
 	// bounds check src[si+1]
-	MOVQ SI, AX
+	LEAQ 1(SI), AX
-	ADDQ $1, AX
 	CMPQ AX, R9
 	JGT err_short_buf
 
@@ -147,13 +147,11 @@ lit_len_finalise:
 
 copy_literal:
 	// bounds check src and dst
-	MOVQ SI, AX
+	LEAQ (SI)(CX*1), AX
-	ADDQ CX, AX
 	CMPQ AX, R9
 	JGT err_short_buf
 
-	MOVQ DI, AX
+	LEAQ (DI)(CX*1), AX
-	ADDQ CX, AX
 	CMPQ AX, R8
 	JGT err_short_buf
 
@@ -219,8 +217,7 @@ offset:
 	// free up DX to use for offset
 	MOVQ DX, CX
 
-	MOVQ SI, AX
+	LEAQ 2(SI), AX
-	ADDQ $2, AX
 	CMPQ AX, R9
 	JGT err_short_buf
 
@@ -247,8 +244,7 @@ match_len_loop:
 	JNE match_len_finalise
 
 	// bounds check src[si+1]
-	MOVQ SI, AX
+	LEAQ 1(SI), AX
-	ADDQ $1, AX
 	CMPQ AX, R9
 	JGT err_short_buf
 
@@ -269,8 +265,7 @@ copy_match:
 
 	// check we have match_len bytes left in dst
 	// di+match_len < len(dst)
-	MOVQ DI, AX
+	LEAQ (DI)(CX*1), AX
-	ADDQ CX, AX
 	CMPQ AX, R8
 	JGT err_short_buf
 
@@ -286,8 +281,7 @@ copy_match:
 	JLT err_short_buf
 
 	// if offset + match_len < di
-	MOVQ BX, AX
+	LEAQ (BX)(CX*1), AX
-	ADDQ CX, AX
 	CMPQ DI, AX
 	JGT copy_interior_match
 

vendor/github.com/pierrec/lz4/v4/internal/lz4block/decode_arm.s

@@ -0,0 +1,201 @@
+// +build gc
+// +build !noasm
+
+#include "textflag.h"
+
+// Register allocation.
+#define dst	R0
+#define dstorig	R1
+#define src	R2
+#define dstend	R3
+#define srcend	R4
+#define match	R5	// Match address.
+#define token	R6
+#define len	R7	// Literal and match lengths.
+#define offset	R6	// Match offset; overlaps with token.
+#define tmp1	R8
+#define tmp2	R9
+#define tmp3	R12
+
+#define minMatch	$4
+
+// func decodeBlock(dst, src []byte) int
+TEXT ·decodeBlock(SB), NOFRAME|NOSPLIT, $-4-28
+	MOVW dst_base +0(FP), dst
+	MOVW dst_len  +4(FP), dstend
+	MOVW src_base+12(FP), src
+	MOVW src_len +16(FP), srcend
+
+	CMP $0, srcend
+	BEQ shortSrc
+
+	ADD dst, dstend
+	ADD src, srcend
+
+	MOVW dst, dstorig
+
+loop:
+	// Read token. Extract literal length.
+	MOVBU.P 1(src), token
+	MOVW    token >> 4, len
+	CMP     $15, len
+	BNE     readLitlenDone
+
+readLitlenLoop:
+	CMP     src, srcend
+	BEQ     shortSrc
+	MOVBU.P 1(src), tmp1
+	ADD     tmp1, len
+	CMP     $255, tmp1
+	BEQ     readLitlenLoop
+
+readLitlenDone:
+	CMP $0, len
+	BEQ copyLiteralDone
+
+	// Bounds check dst+len and src+len.
+	ADD    dst, len, tmp1
+	CMP    dstend, tmp1
+	//BHI  shortDst	// Uncomment for distinct error codes.
+	ADD    src, len, tmp2
+	CMP.LS srcend, tmp2
+	BHI    shortSrc
+
+	// Copy literal.
+	CMP $4, len
+	BLO copyLiteralFinish
+
+	// Copy 0-3 bytes until src is aligned.
+	TST        $1, src
+	MOVBU.NE.P 1(src), tmp1
+	MOVB.NE.P  tmp1, 1(dst)
+	SUB.NE     $1, len
+
+	TST        $2, src
+	MOVHU.NE.P 2(src), tmp2
+	MOVB.NE.P  tmp2, 1(dst)
+	MOVW.NE    tmp2 >> 8, tmp1
+	MOVB.NE.P  tmp1, 1(dst)
+	SUB.NE     $2, len
+
+	B copyLiteralLoopCond
+
+copyLiteralLoop:
+	// Aligned load, unaligned write.
+	MOVW.P 4(src), tmp1
+	MOVW   tmp1 >>  8, tmp2
+	MOVB   tmp2, 1(dst)
+	MOVW   tmp1 >> 16, tmp3
+	MOVB   tmp3, 2(dst)
+	MOVW   tmp1 >> 24, tmp2
+	MOVB   tmp2, 3(dst)
+	MOVB.P tmp1, 4(dst)
+copyLiteralLoopCond:
+	// Loop until len-4 < 0.
+	SUB.S  $4, len
+	BPL    copyLiteralLoop
+
+	// Restore len, which is now negative.
+	ADD $4, len
+
+copyLiteralFinish:
+	// Copy remaining 0-3 bytes.
+	TST        $2, len
+	MOVHU.NE.P 2(src), tmp2
+	MOVB.NE.P  tmp2, 1(dst)
+	MOVW.NE    tmp2 >> 8, tmp1
+	MOVB.NE.P  tmp1, 1(dst)
+	TST        $1, len
+	MOVBU.NE.P 1(src), tmp1
+	MOVB.NE.P  tmp1, 1(dst)
+
+copyLiteralDone:
+	CMP src, srcend
+	BEQ end
+
+	// Initial part of match length.
+	// This frees up the token register for reuse as offset.
+	AND $15, token, len
+
+	// Read offset.
+	ADD   $2, src
+	CMP   srcend, src
+	BHI   shortSrc
+	MOVBU -2(src), offset
+	MOVBU -1(src), tmp1
+	ORR   tmp1 << 8, offset
+	CMP   $0, offset
+	BEQ   corrupt
+
+	// Read rest of match length.
+	CMP $15, len
+	BNE readMatchlenDone
+
+readMatchlenLoop:
+	CMP     src, srcend
+	BEQ     shortSrc
+	MOVBU.P 1(src), tmp1
+	ADD     tmp1, len
+	CMP     $255, tmp1
+	BEQ     readMatchlenLoop
+
+readMatchlenDone:
+	ADD minMatch, len
+
+	// Bounds check dst+len and match = dst-offset.
+	ADD    dst, len, tmp1
+	CMP    dstend, tmp1
+	//BHI  shortDst	// Uncomment for distinct error codes.
+	SUB    offset, dst, match
+	CMP.LS match, dstorig
+	BHI    corrupt
+
+	// If the offset is at least four (len is, because of minMatch),
+	// do a four-way unrolled byte copy loop. Using MOVD instead of four
+	// byte loads is much faster, but to remain portable we'd have to
+	// align match first, which in turn is too expensive.
+	CMP $4, offset
+	BLO copyMatch
+
+	SUB $4, len
+copyMatch4:
+	MOVBU.P 4(match), tmp1
+	MOVB.P  tmp1, 4(dst)
+	MOVBU   -3(match), tmp2
+	MOVB    tmp2, -3(dst)
+	MOVBU   -2(match), tmp3
+	MOVB    tmp3, -2(dst)
+	MOVBU   -1(match), tmp1
+	MOVB    tmp1, -1(dst)
+	SUB.S   $4, len
+	BPL     copyMatch4
+
+	// Restore len, which is now negative.
+	ADD.S $4, len
+	BEQ   copyMatchDone
+
+copyMatch:
+	// Simple byte-at-a-time copy.
+	SUB.S   $1, len
+	MOVBU.P 1(match), tmp2
+	MOVB.P  tmp2, 1(dst)
+	BNE     copyMatch
+
+copyMatchDone:
+	CMP src, srcend
+	BNE loop
+
+end:
+	SUB  dstorig, dst, tmp1
+	MOVW tmp1, ret+24(FP)
+	RET
+
+	// The three error cases have distinct labels so we can put different
+	// return codes here when debugging, or if the error returns need to
+	// be changed.
+shortDst:
+shortSrc:
+corrupt:
+	MOVW $-1, tmp1
+	MOVW tmp1, ret+24(FP)
+	RET

vendor/github.com/pierrec/lz4/v4/internal/lz4block/decode_asm.go

@@ -1,8 +1,9 @@
+// +build amd64 arm
 // +build !appengine
 // +build gc
 // +build !noasm
 
-package lz4
+package lz4block
 
 //go:noescape
 func decodeBlock(dst, src []byte) int

vendor/github.com/pierrec/lz4/v4/internal/lz4block/decode_other.go

@@ -1,6 +1,6 @@
-// +build !amd64 appengine !gc noasm
+// +build !amd64,!arm appengine !gc noasm
 
-package lz4
+package lz4block
 
 func decodeBlock(dst, src []byte) (ret int) {
 	const hasError = -2
@@ -10,16 +10,16 @@ func decodeBlock(dst, src []byte) (ret int) {
 		}
 	}()
 
-	var si, di int
+	var si, di uint
 	for {
 		// Literals and match lengths (token).
-		b := int(src[si])
+		b := uint(src[si])
 		si++
 
 		// Literals.
 		if lLen := b >> 4; lLen > 0 {
 			switch {
-			case lLen < 0xF && si+16 < len(src):
+			case lLen < 0xF && si+16 < uint(len(src)):
 				// Shortcut 1
 				// if we have enough room in src and dst, and the literals length
 				// is small enough (0..14) then copy all 16 bytes, even if not all
@@ -32,13 +32,13 @@ func decodeBlock(dst, src []byte) (ret int) {
 					// if the match length (4..18) fits within the literals, then copy
 					// all 18 bytes, even if not all are part of the literals.
 					mLen += 4
-					if offset := int(src[si]) | int(src[si+1])<<8; mLen <= offset {
+					if offset := uint(src[si]) | uint(src[si+1])<<8; mLen <= offset {
 						i := di - offset
 						end := i + 18
-						if end > len(dst) {
+						if end > uint(len(dst)) {
 							// The remaining buffer may not hold 18 bytes.
 							// See https://github.com/pierrec/lz4/issues/51.
-							end = len(dst)
+							end = uint(len(dst))
 						}
 						copy(dst[di:], dst[i:end])
 						si += 2
@@ -51,7 +51,7 @@ func decodeBlock(dst, src []byte) (ret int) {
 					lLen += 0xFF
 					si++
 				}
-				lLen += int(src[si])
+				lLen += uint(src[si])
 				si++
 				fallthrough
 			default:
@@ -60,11 +60,13 @@ func decodeBlock(dst, src []byte) (ret int) {
 				di += lLen
 			}
 		}
-		if si >= len(src) {
+		if si == uint(len(src)) {
-			return di
+			return int(di)
+		} else if si > uint(len(src)) {
+			return hasError
 		}
 
-		offset := int(src[si]) | int(src[si+1])<<8
+		offset := uint(src[si]) | uint(src[si+1])<<8
 		if offset == 0 {
 			return hasError
 		}
@@ -77,7 +79,7 @@ func decodeBlock(dst, src []byte) (ret int) {
 				mLen += 0xFF
 				si++
 			}
-			mLen += int(src[si])
+			mLen += uint(src[si])
 			si++
 		}
 		mLen += minMatch
@@ -93,6 +95,6 @@ func decodeBlock(dst, src []byte) (ret int) {
 			di += bytesToCopy
 			mLen -= bytesToCopy
 		}
-		di += copy(dst[di:di+mLen], expanded[:mLen])
+		di += uint(copy(dst[di:di+mLen], expanded[:mLen]))
 	}
 }

vendor/github.com/pierrec/lz4/v4/internal/lz4errors/errors.go

@@ -0,0 +1,19 @@
+package lz4errors
+
+type Error string
+
+func (e Error) Error() string { return string(e) }
+
+const (
+	ErrInvalidSourceShortBuffer      Error = "lz4: invalid source or destination buffer too short"
+	ErrInvalidFrame                  Error = "lz4: bad magic number"
+	ErrInternalUnhandledState        Error = "lz4: unhandled state"
+	ErrInvalidHeaderChecksum         Error = "lz4: invalid header checksum"
+	ErrInvalidBlockChecksum          Error = "lz4: invalid block checksum"
+	ErrInvalidFrameChecksum          Error = "lz4: invalid frame checksum"
+	ErrOptionInvalidCompressionLevel Error = "lz4: invalid compression level"
+	ErrOptionClosedOrError           Error = "lz4: cannot apply options on closed or in error object"
+	ErrOptionInvalidBlockSize        Error = "lz4: invalid block size"
+	ErrOptionNotApplicable           Error = "lz4: option not applicable"
+	ErrWriterNotClosed               Error = "lz4: writer not closed"
+)

vendor/github.com/pierrec/lz4/v4/internal/lz4stream/block.go

@@ -0,0 +1,331 @@
+package lz4stream
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+	"sync"
+
+	"github.com/pierrec/lz4/v4/internal/lz4block"
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+	"github.com/pierrec/lz4/v4/internal/xxh32"
+)
+
+type Blocks struct {
+	Block  *FrameDataBlock
+	Blocks chan chan *FrameDataBlock
+	mu     sync.Mutex
+	err    error
+}
+
+func (b *Blocks) initW(f *Frame, dst io.Writer, num int) {
+	if num == 1 {
+		b.Blocks = nil
+		b.Block = NewFrameDataBlock(f)
+		return
+	}
+	b.Block = nil
+	if cap(b.Blocks) != num {
+		b.Blocks = make(chan chan *FrameDataBlock, num)
+	}
+	// goroutine managing concurrent block compression goroutines.
+	go func() {
+		// Process next block compression item.
+		for c := range b.Blocks {
+			// Read the next compressed block result.
+			// Waiting here ensures that the blocks are output in the order they were sent.
+			// The incoming channel is always closed as it indicates to the caller that
+			// the block has been processed.
+			block := <-c
+			if block == nil {
+				// Notify the block compression routine that we are done with its result.
+				// This is used when a sentinel block is sent to terminate the compression.
+				close(c)
+				return
+			}
+			// Do not attempt to write the block upon any previous failure.
+			if b.err == nil {
+				// Write the block.
+				if err := block.Write(f, dst); err != nil {
+					// Keep the first error.
+					b.err = err
+					// All pending compression goroutines need to shut down, so we need to keep going.
+				}
+			}
+			close(c)
+		}
+	}()
+}
+
+func (b *Blocks) close(f *Frame, num int) error {
+	if num == 1 {
+		if b.Block != nil {
+			b.Block.Close(f)
+		}
+		err := b.err
+		b.err = nil
+		return err
+	}
+	if b.Blocks == nil {
+		// Not initialized yet.
+		return nil
+	}
+	c := make(chan *FrameDataBlock)
+	b.Blocks <- c
+	c <- nil
+	<-c
+	err := b.err
+	b.err = nil
+	return err
+}
+
+// ErrorR returns any error set while uncompressing a stream.
+func (b *Blocks) ErrorR() error {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	return b.err
+}
+
+// initR returns a channel that streams the uncompressed blocks if in concurrent
+// mode and no error. When the channel is closed, check for any error with b.ErrorR.
+//
+// If not in concurrent mode, the uncompressed block is b.Block and the returned error
+// needs to be checked.
+func (b *Blocks) initR(f *Frame, num int, src io.Reader) (chan []byte, error) {
+	size := f.Descriptor.Flags.BlockSizeIndex()
+	if num == 1 {
+		b.Blocks = nil
+		b.Block = NewFrameDataBlock(f)
+		return nil, nil
+	}
+	b.Block = nil
+	blocks := make(chan chan []byte, num)
+	// data receives the uncompressed blocks.
+	data := make(chan []byte)
+	// Read blocks from the source sequentially
+	// and uncompress them concurrently.
+
+	// In legacy mode, accrue the uncompress sizes in cum.
+	var cum uint32
+	go func() {
+		var cumx uint32
+		var err error
+		for b.ErrorR() == nil {
+			block := NewFrameDataBlock(f)
+			cumx, err = block.Read(f, src, 0)
+			if err != nil {
+				break
+			}
+			// Recheck for an error as reading may be slow and uncompressing is expensive.
+			if b.ErrorR() != nil {
+				break
+			}
+			c := make(chan []byte)
+			blocks <- c
+			go func() {
+				data, err := block.Uncompress(f, size.Get(), false)
+				if err != nil {
+					b.closeR(err)
+				} else {
+					c <- data
+				}
+			}()
+		}
+		// End the collection loop and the data channel.
+		c := make(chan []byte)
+		blocks <- c
+		c <- nil // signal the collection loop that we are done
+		<-c      // wait for the collect loop to complete
+		if f.isLegacy() && cum == cumx {
+			err = io.EOF
+		}
+		b.closeR(err)
+		close(data)
+	}()
+	// Collect the uncompressed blocks and make them available
+	// on the returned channel.
+	go func(leg bool) {
+		defer close(blocks)
+		for c := range blocks {
+			buf := <-c
+			if buf == nil {
+				// Signal to end the loop.
+				close(c)
+				return
+			}
+			// Perform checksum now as the blocks are received in order.
+			if f.Descriptor.Flags.ContentChecksum() {
+				_, _ = f.checksum.Write(buf)
+			}
+			if leg {
+				cum += uint32(len(buf))
+			}
+			data <- buf
+			close(c)
+		}
+	}(f.isLegacy())
+	return data, nil
+}
+
+// closeR safely sets the error on b if not already set.
+func (b *Blocks) closeR(err error) {
+	b.mu.Lock()
+	if b.err == nil {
+		b.err = err
+	}
+	b.mu.Unlock()
+}
+
+func NewFrameDataBlock(f *Frame) *FrameDataBlock {
+	buf := f.Descriptor.Flags.BlockSizeIndex().Get()
+	return &FrameDataBlock{Data: buf, data: buf}
+}
+
+type FrameDataBlock struct {
+	Size     DataBlockSize
+	Data     []byte // compressed or uncompressed data (.data or .src)
+	Checksum uint32
+	data     []byte // buffer for compressed data
+	src      []byte // uncompressed data
+	err      error  // used in concurrent mode
+}
+
+func (b *FrameDataBlock) Close(f *Frame) {
+	b.Size = 0
+	b.Checksum = 0
+	b.err = nil
+	if b.data != nil {
+		// Block was not already closed.
+		lz4block.Put(b.data)
+		b.Data = nil
+		b.data = nil
+		b.src = nil
+	}
+}
+
+// Block compression errors are ignored since the buffer is sized appropriately.
+func (b *FrameDataBlock) Compress(f *Frame, src []byte, level lz4block.CompressionLevel) *FrameDataBlock {
+	data := b.data
+	if f.isLegacy() {
+		data = data[:cap(data)]
+	} else {
+		data = data[:len(src)] // trigger the incompressible flag in CompressBlock
+	}
+	var n int
+	switch level {
+	case lz4block.Fast:
+		n, _ = lz4block.CompressBlock(src, data)
+	default:
+		n, _ = lz4block.CompressBlockHC(src, data, level)
+	}
+	if n == 0 {
+		b.Size.UncompressedSet(true)
+		b.Data = src
+	} else {
+		b.Size.UncompressedSet(false)
+		b.Data = data[:n]
+	}
+	b.Size.sizeSet(len(b.Data))
+	b.src = src // keep track of the source for content checksum
+
+	if f.Descriptor.Flags.BlockChecksum() {
+		b.Checksum = xxh32.ChecksumZero(src)
+	}
+	return b
+}
+
+func (b *FrameDataBlock) Write(f *Frame, dst io.Writer) error {
+	// Write is called in the same order as blocks are compressed,
+	// so content checksum must be done here.
+	if f.Descriptor.Flags.ContentChecksum() {
+		_, _ = f.checksum.Write(b.src)
+	}
+	buf := f.buf[:]
+	binary.LittleEndian.PutUint32(buf, uint32(b.Size))
+	if _, err := dst.Write(buf[:4]); err != nil {
+		return err
+	}
+
+	if _, err := dst.Write(b.Data); err != nil {
+		return err
+	}
+
+	if b.Checksum == 0 {
+		return nil
+	}
+	binary.LittleEndian.PutUint32(buf, b.Checksum)
+	_, err := dst.Write(buf[:4])
+	return err
+}
+
+// Read updates b with the next block data, size and checksum if available.
+func (b *FrameDataBlock) Read(f *Frame, src io.Reader, cum uint32) (uint32, error) {
+	x, err := f.readUint32(src)
+	if err != nil {
+		return 0, err
+	}
+	if f.isLegacy() {
+		switch x {
+		case frameMagicLegacy:
+			// Concatenated legacy frame.
+			return b.Read(f, src, cum)
+		case cum:
+			// Only works in non concurrent mode, for concurrent mode
+			// it is handled separately.
+			// Linux kernel format appends the total uncompressed size at the end.
+			return 0, io.EOF
+		}
+	} else if x == 0 {
+		// Marker for end of stream.
+		return 0, io.EOF
+	}
+	b.Size = DataBlockSize(x)
+
+	size := b.Size.size()
+	if size > cap(b.data) {
+		return x, lz4errors.ErrOptionInvalidBlockSize
+	}
+	b.data = b.data[:size]
+	if _, err := io.ReadFull(src, b.data); err != nil {
+		return x, err
+	}
+	if f.Descriptor.Flags.BlockChecksum() {
+		sum, err := f.readUint32(src)
+		if err != nil {
+			return 0, err
+		}
+		b.Checksum = sum
+	}
+	return x, nil
+}
+
+func (b *FrameDataBlock) Uncompress(f *Frame, dst []byte, sum bool) ([]byte, error) {
+	if b.Size.Uncompressed() {
+		n := copy(dst, b.data)
+		dst = dst[:n]
+	} else {
+		n, err := lz4block.UncompressBlock(b.data, dst)
+		if err != nil {
+			return nil, err
+		}
+		dst = dst[:n]
+	}
+	if f.Descriptor.Flags.BlockChecksum() {
+		if c := xxh32.ChecksumZero(dst); c != b.Checksum {
+			err := fmt.Errorf("%w: got %x; expected %x", lz4errors.ErrInvalidBlockChecksum, c, b.Checksum)
+			return nil, err
+		}
+	}
+	if sum && f.Descriptor.Flags.ContentChecksum() {
+		_, _ = f.checksum.Write(dst)
+	}
+	return dst, nil
+}
+
+func (f *Frame) readUint32(r io.Reader) (x uint32, err error) {
+	if _, err = io.ReadFull(r, f.buf[:4]); err != nil {
+		return
+	}
+	x = binary.LittleEndian.Uint32(f.buf[:4])
+	return
+}

vendor/github.com/pierrec/lz4/v4/internal/lz4stream/frame.go

@@ -0,0 +1,200 @@
+// Package lz4stream provides the types that support reading and writing LZ4 data streams.
+package lz4stream
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+	"io/ioutil"
+
+	"github.com/pierrec/lz4/v4/internal/lz4block"
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+	"github.com/pierrec/lz4/v4/internal/xxh32"
+)
+
+//go:generate go run gen.go
+
+const (
+	frameMagic       uint32 = 0x184D2204
+	frameSkipMagic   uint32 = 0x184D2A50
+	frameMagicLegacy uint32 = 0x184C2102
+)
+
+func NewFrame() *Frame {
+	return &Frame{}
+}
+
+type Frame struct {
+	buf        [15]byte // frame descriptor needs at most 4(magic)+4+8+1=11 bytes
+	Magic      uint32
+	Descriptor FrameDescriptor
+	Blocks     Blocks
+	Checksum   uint32
+	checksum   xxh32.XXHZero
+}
+
+// Reset allows reusing the Frame.
+// The Descriptor configuration is not modified.
+func (f *Frame) Reset(num int) {
+	f.Magic = 0
+	f.Descriptor.Checksum = 0
+	f.Descriptor.ContentSize = 0
+	_ = f.Blocks.close(f, num)
+	f.Checksum = 0
+}
+
+func (f *Frame) InitW(dst io.Writer, num int, legacy bool) {
+	if legacy {
+		f.Magic = frameMagicLegacy
+		idx := lz4block.Index(lz4block.Block8Mb)
+		f.Descriptor.Flags.BlockSizeIndexSet(idx)
+	} else {
+		f.Magic = frameMagic
+		f.Descriptor.initW()
+	}
+	f.Blocks.initW(f, dst, num)
+	f.checksum.Reset()
+}
+
+func (f *Frame) CloseW(dst io.Writer, num int) error {
+	if err := f.Blocks.close(f, num); err != nil {
+		return err
+	}
+	if f.isLegacy() {
+		return nil
+	}
+	buf := f.buf[:0]
+	// End mark (data block size of uint32(0)).
+	buf = append(buf, 0, 0, 0, 0)
+	if f.Descriptor.Flags.ContentChecksum() {
+		buf = f.checksum.Sum(buf)
+	}
+	_, err := dst.Write(buf)
+	return err
+}
+
+func (f *Frame) isLegacy() bool {
+	return f.Magic == frameMagicLegacy
+}
+
+func (f *Frame) InitR(src io.Reader, num int) (chan []byte, error) {
+	if f.Magic > 0 {
+		// Header already read.
+		return nil, nil
+	}
+
+newFrame:
+	var err error
+	if f.Magic, err = f.readUint32(src); err != nil {
+		return nil, err
+	}
+	switch m := f.Magic; {
+	case m == frameMagic || m == frameMagicLegacy:
+	// All 16 values of frameSkipMagic are valid.
+	case m>>8 == frameSkipMagic>>8:
+		skip, err := f.readUint32(src)
+		if err != nil {
+			return nil, err
+		}
+		if _, err := io.CopyN(ioutil.Discard, src, int64(skip)); err != nil {
+			return nil, err
+		}
+		goto newFrame
+	default:
+		return nil, lz4errors.ErrInvalidFrame
+	}
+	if err := f.Descriptor.initR(f, src); err != nil {
+		return nil, err
+	}
+	f.checksum.Reset()
+	return f.Blocks.initR(f, num, src)
+}
+
+func (f *Frame) CloseR(src io.Reader) (err error) {
+	if f.isLegacy() {
+		return nil
+	}
+	if !f.Descriptor.Flags.ContentChecksum() {
+		return nil
+	}
+	if f.Checksum, err = f.readUint32(src); err != nil {
+		return err
+	}
+	if c := f.checksum.Sum32(); c != f.Checksum {
+		return fmt.Errorf("%w: got %x; expected %x", lz4errors.ErrInvalidFrameChecksum, c, f.Checksum)
+	}
+	return nil
+}
+
+type FrameDescriptor struct {
+	Flags       DescriptorFlags
+	ContentSize uint64
+	Checksum    uint8
+}
+
+func (fd *FrameDescriptor) initW() {
+	fd.Flags.VersionSet(1)
+	fd.Flags.BlockIndependenceSet(true)
+}
+
+func (fd *FrameDescriptor) Write(f *Frame, dst io.Writer) error {
+	if fd.Checksum > 0 {
+		// Header already written.
+		return nil
+	}
+
+	buf := f.buf[:4]
+	// Write the magic number here even though it belongs to the Frame.
+	binary.LittleEndian.PutUint32(buf, f.Magic)
+	if !f.isLegacy() {
+		buf = buf[:4+2]
+		binary.LittleEndian.PutUint16(buf[4:], uint16(fd.Flags))
+
+		if fd.Flags.Size() {
+			buf = buf[:4+2+8]
+			binary.LittleEndian.PutUint64(buf[4+2:], fd.ContentSize)
+		}
+		fd.Checksum = descriptorChecksum(buf[4:])
+		buf = append(buf, fd.Checksum)
+	}
+
+	_, err := dst.Write(buf)
+	return err
+}
+
+func (fd *FrameDescriptor) initR(f *Frame, src io.Reader) error {
+	if f.isLegacy() {
+		idx := lz4block.Index(lz4block.Block8Mb)
+		f.Descriptor.Flags.BlockSizeIndexSet(idx)
+		return nil
+	}
+	// Read the flags and the checksum, hoping that there is not content size.
+	buf := f.buf[:3]
+	if _, err := io.ReadFull(src, buf); err != nil {
+		return err
+	}
+	descr := binary.LittleEndian.Uint16(buf)
+	fd.Flags = DescriptorFlags(descr)
+	if fd.Flags.Size() {
+		// Append the 8 missing bytes.
+		buf = buf[:3+8]
+		if _, err := io.ReadFull(src, buf[3:]); err != nil {
+			return err
+		}
+		fd.ContentSize = binary.LittleEndian.Uint64(buf[2:])
+	}
+	fd.Checksum = buf[len(buf)-1] // the checksum is the last byte
+	buf = buf[:len(buf)-1]        // all descriptor fields except checksum
+	if c := descriptorChecksum(buf); fd.Checksum != c {
+		return fmt.Errorf("%w: got %x; expected %x", lz4errors.ErrInvalidHeaderChecksum, c, fd.Checksum)
+	}
+	// Validate the elements that can be.
+	if idx := fd.Flags.BlockSizeIndex(); !idx.IsValid() {
+		return lz4errors.ErrOptionInvalidBlockSize
+	}
+	return nil
+}
+
+func descriptorChecksum(buf []byte) byte {
+	return byte(xxh32.ChecksumZero(buf) >> 8)
+}

vendor/github.com/pierrec/lz4/v4/internal/lz4stream/frame_gen.go

@@ -0,0 +1,103 @@
+// Code generated by `gen.exe`. DO NOT EDIT.
+
+package lz4stream
+
+import "github.com/pierrec/lz4/v4/internal/lz4block"
+
+// DescriptorFlags is defined as follow:
+//   field              bits
+//   -----              ----
+//   _                  2
+//   ContentChecksum    1
+//   Size               1
+//   BlockChecksum      1
+//   BlockIndependence  1
+//   Version            2
+//   _                  4
+//   BlockSizeIndex     3
+//   _                  1
+type DescriptorFlags uint16
+
+// Getters.
+func (x DescriptorFlags) ContentChecksum() bool   { return x>>2&1 != 0 }
+func (x DescriptorFlags) Size() bool              { return x>>3&1 != 0 }
+func (x DescriptorFlags) BlockChecksum() bool     { return x>>4&1 != 0 }
+func (x DescriptorFlags) BlockIndependence() bool { return x>>5&1 != 0 }
+func (x DescriptorFlags) Version() uint16         { return uint16(x >> 6 & 0x3) }
+func (x DescriptorFlags) BlockSizeIndex() lz4block.BlockSizeIndex {
+	return lz4block.BlockSizeIndex(x >> 12 & 0x7)
+}
+
+// Setters.
+func (x *DescriptorFlags) ContentChecksumSet(v bool) *DescriptorFlags {
+	const b = 1 << 2
+	if v {
+		*x = *x&^b | b
+	} else {
+		*x &^= b
+	}
+	return x
+}
+func (x *DescriptorFlags) SizeSet(v bool) *DescriptorFlags {
+	const b = 1 << 3
+	if v {
+		*x = *x&^b | b
+	} else {
+		*x &^= b
+	}
+	return x
+}
+func (x *DescriptorFlags) BlockChecksumSet(v bool) *DescriptorFlags {
+	const b = 1 << 4
+	if v {
+		*x = *x&^b | b
+	} else {
+		*x &^= b
+	}
+	return x
+}
+func (x *DescriptorFlags) BlockIndependenceSet(v bool) *DescriptorFlags {
+	const b = 1 << 5
+	if v {
+		*x = *x&^b | b
+	} else {
+		*x &^= b
+	}
+	return x
+}
+func (x *DescriptorFlags) VersionSet(v uint16) *DescriptorFlags {
+	*x = *x&^(0x3<<6) | (DescriptorFlags(v) & 0x3 << 6)
+	return x
+}
+func (x *DescriptorFlags) BlockSizeIndexSet(v lz4block.BlockSizeIndex) *DescriptorFlags {
+	*x = *x&^(0x7<<12) | (DescriptorFlags(v) & 0x7 << 12)
+	return x
+}
+
+// Code generated by `gen.exe`. DO NOT EDIT.
+
+// DataBlockSize is defined as follow:
+//   field         bits
+//   -----         ----
+//   size          31
+//   Uncompressed  1
+type DataBlockSize uint32
+
+// Getters.
+func (x DataBlockSize) size() int          { return int(x & 0x7FFFFFFF) }
+func (x DataBlockSize) Uncompressed() bool { return x>>31&1 != 0 }
+
+// Setters.
+func (x *DataBlockSize) sizeSet(v int) *DataBlockSize {
+	*x = *x&^0x7FFFFFFF | DataBlockSize(v)&0x7FFFFFFF
+	return x
+}
+func (x *DataBlockSize) UncompressedSet(v bool) *DataBlockSize {
+	const b = 1 << 31
+	if v {
+		*x = *x&^b | b
+	} else {
+		*x &^= b
+	}
+	return x
+}

vendor/github.com/pierrec/lz4/v4/internal/xxh32/xxh32zero.go

@@ -20,10 +20,7 @@ const (
 
 // XXHZero represents an xxhash32 object with seed 0.
 type XXHZero struct {
-	v1       uint32
+	v        [4]uint32
-	v2       uint32
-	v3       uint32
-	v4       uint32
 	totalLen uint64
 	buf      [16]byte
 	bufused  int
@@ -38,10 +35,10 @@ func (xxh XXHZero) Sum(b []byte) []byte {
 
 // Reset resets the Hash to its initial state.
 func (xxh *XXHZero) Reset() {
-	xxh.v1 = prime1plus2
+	xxh.v[0] = prime1plus2
-	xxh.v2 = prime2
+	xxh.v[1] = prime2
-	xxh.v3 = 0
+	xxh.v[2] = 0
-	xxh.v4 = prime1minus
+	xxh.v[3] = prime1minus
 	xxh.totalLen = 0
 	xxh.bufused = 0
 }
@@ -51,7 +48,7 @@ func (xxh *XXHZero) Size() int {
 	return 4
 }
 
-// BlockSize gives the minimum number of bytes accepted by Write().
+// BlockSizeIndex gives the minimum number of bytes accepted by Write().
 func (xxh *XXHZero) BlockSize() int {
 	return 1
 }
@@ -74,44 +71,48 @@ func (xxh *XXHZero) Write(input []byte) (int, error) {
 		return n, nil
 	}
 
-	p := 0
+	var buf *[16]byte
-	// Causes compiler to work directly from registers instead of stack:
+	if m != 0 {
-	v1, v2, v3, v4 := xxh.v1, xxh.v2, xxh.v3, xxh.v4
-	if m > 0 {
 		// some data left from previous update
-		copy(xxh.buf[xxh.bufused:], input[:r])
+		buf = &xxh.buf
-		xxh.bufused += len(input) - r
+		c := copy(buf[m:], input)
+		n -= c
+		input = input[c:]
+	}
+	update(&xxh.v, buf, input)
+	xxh.bufused = copy(xxh.buf[:], input[n-n%16:])
 
-		// fast rotl(13)
+	return n, nil
-		buf := xxh.buf[:16] // BCE hint.
+}
+
+// Portable version of update. This updates v by processing all of buf
+// (if not nil) and all full 16-byte blocks of input.
+func updateGo(v *[4]uint32, buf *[16]byte, input []byte) {
+	// Causes compiler to work directly from registers instead of stack:
+	v1, v2, v3, v4 := v[0], v[1], v[2], v[3]
+
+	if buf != nil {
 		v1 = rol13(v1+binary.LittleEndian.Uint32(buf[:])*prime2) * prime1
 		v2 = rol13(v2+binary.LittleEndian.Uint32(buf[4:])*prime2) * prime1
 		v3 = rol13(v3+binary.LittleEndian.Uint32(buf[8:])*prime2) * prime1
 		v4 = rol13(v4+binary.LittleEndian.Uint32(buf[12:])*prime2) * prime1
-		p = r
-		xxh.bufused = 0
 	}
 
-	for n := n - 16; p <= n; p += 16 {
+	for ; len(input) >= 16; input = input[16:] {
-		sub := input[p:][:16] //BCE hint for compiler
+		sub := input[:16] //BCE hint for compiler
 		v1 = rol13(v1+binary.LittleEndian.Uint32(sub[:])*prime2) * prime1
 		v2 = rol13(v2+binary.LittleEndian.Uint32(sub[4:])*prime2) * prime1
 		v3 = rol13(v3+binary.LittleEndian.Uint32(sub[8:])*prime2) * prime1
 		v4 = rol13(v4+binary.LittleEndian.Uint32(sub[12:])*prime2) * prime1
 	}
-	xxh.v1, xxh.v2, xxh.v3, xxh.v4 = v1, v2, v3, v4
+	v[0], v[1], v[2], v[3] = v1, v2, v3, v4
-
-	copy(xxh.buf[xxh.bufused:], input[p:])
-	xxh.bufused += len(input) - p
-
-	return n, nil
 }
 
 // Sum32 returns the 32 bits Hash value.
 func (xxh *XXHZero) Sum32() uint32 {
 	h32 := uint32(xxh.totalLen)
 	if h32 >= 16 {
-		h32 += rol1(xxh.v1) + rol7(xxh.v2) + rol12(xxh.v3) + rol18(xxh.v4)
+		h32 += rol1(xxh.v[0]) + rol7(xxh.v[1]) + rol12(xxh.v[2]) + rol18(xxh.v[3])
 	} else {
 		h32 += prime5
 	}
@@ -137,8 +138,8 @@ func (xxh *XXHZero) Sum32() uint32 {
 	return h32
 }
 
-// ChecksumZero returns the 32bits Hash value.
+// Portable version of ChecksumZero.
-func ChecksumZero(input []byte) uint32 {
+func checksumZeroGo(input []byte) uint32 {
 	n := len(input)
 	h32 := uint32(n)
 
@@ -182,18 +183,6 @@ func ChecksumZero(input []byte) uint32 {
 	return h32
 }
 
-// Uint32Zero hashes x with seed 0.
-func Uint32Zero(x uint32) uint32 {
-	h := prime5 + 4 + x*prime3
-	h = rol17(h) * prime4
-	h ^= h >> 15
-	h *= prime2
-	h ^= h >> 13
-	h *= prime3
-	h ^= h >> 16
-	return h
-}
-
 func rol1(u uint32) uint32 {
 	return u<<1 | u>>31
 }

vendor/github.com/pierrec/lz4/v4/internal/xxh32/xxh32zero_arm.go

@@ -0,0 +1,11 @@
+// +build !noasm
+
+package xxh32
+
+// ChecksumZero returns the 32-bit hash of input.
+//
+//go:noescape
+func ChecksumZero(input []byte) uint32
+
+//go:noescape
+func update(v *[4]uint32, buf *[16]byte, input []byte)

vendor/github.com/pierrec/lz4/v4/internal/xxh32/xxh32zero_arm.s

@@ -0,0 +1,259 @@
+// +build !noasm
+
+#include "textflag.h"
+
+#define prime1		$2654435761
+#define prime2		$2246822519
+#define prime3		$3266489917
+#define prime4		$668265263
+#define prime5		$374761393
+
+#define prime1plus2	$606290984
+#define prime1minus	$1640531535
+
+// Register allocation.
+#define p	R0
+#define n	R1
+#define h	R2
+#define v1	R2	// Alias for h.
+#define v2	R3
+#define v3	R4
+#define v4	R5
+#define x1	R6
+#define x2	R7
+#define x3	R8
+#define x4	R9
+
+// We need the primes in registers. The 16-byte loop only uses prime{1,2}.
+#define prime1r	R11
+#define prime2r	R12
+#define prime3r	R3	// The rest can alias v{2-4}.
+#define prime4r	R4
+#define prime5r	R5
+
+// Update round macros. These read from and increment p.
+
+#define round16aligned			\
+	MOVM.IA.W (p), [x1, x2, x3, x4]	\
+					\
+	MULA x1, prime2r, v1, v1	\
+	MULA x2, prime2r, v2, v2	\
+	MULA x3, prime2r, v3, v3	\
+	MULA x4, prime2r, v4, v4	\
+					\
+	MOVW v1 @> 19, v1		\
+	MOVW v2 @> 19, v2		\
+	MOVW v3 @> 19, v3		\
+	MOVW v4 @> 19, v4		\
+					\
+	MUL prime1r, v1			\
+	MUL prime1r, v2			\
+	MUL prime1r, v3			\
+	MUL prime1r, v4			\
+
+#define round16unaligned 		\
+	MOVBU.P  16(p), x1		\
+	MOVBU   -15(p), x2		\
+	ORR     x2 <<  8, x1		\
+	MOVBU   -14(p), x3		\
+	MOVBU   -13(p), x4		\
+	ORR     x4 <<  8, x3		\
+	ORR     x3 << 16, x1		\
+					\
+	MULA x1, prime2r, v1, v1	\
+	MOVW v1 @> 19, v1		\
+	MUL prime1r, v1			\
+					\
+	MOVBU -12(p), x1		\
+	MOVBU -11(p), x2		\
+	ORR   x2 <<  8, x1		\
+	MOVBU -10(p), x3		\
+	MOVBU  -9(p), x4		\
+	ORR   x4 <<  8, x3		\
+	ORR   x3 << 16, x1		\
+					\
+	MULA x1, prime2r, v2, v2	\
+	MOVW v2 @> 19, v2		\
+	MUL prime1r, v2			\
+					\
+	MOVBU -8(p), x1			\
+	MOVBU -7(p), x2			\
+	ORR   x2 <<  8, x1		\
+	MOVBU -6(p), x3			\
+	MOVBU -5(p), x4			\
+	ORR   x4 <<  8, x3		\
+	ORR   x3 << 16, x1		\
+					\
+	MULA x1, prime2r, v3, v3	\
+	MOVW v3 @> 19, v3		\
+	MUL prime1r, v3			\
+					\
+	MOVBU -4(p), x1			\
+	MOVBU -3(p), x2			\
+	ORR   x2 <<  8, x1		\
+	MOVBU -2(p), x3			\
+	MOVBU -1(p), x4			\
+	ORR   x4 <<  8, x3		\
+	ORR   x3 << 16, x1		\
+					\
+	MULA x1, prime2r, v4, v4	\
+	MOVW v4 @> 19, v4		\
+	MUL prime1r, v4			\
+
+
+// func ChecksumZero([]byte) uint32
+TEXT ·ChecksumZero(SB), NOFRAME|NOSPLIT, $-4-16
+	MOVW input_base+0(FP), p
+	MOVW input_len+4(FP),  n
+
+	MOVW prime1, prime1r
+	MOVW prime2, prime2r
+
+	// Set up h for n < 16. It's tempting to say {ADD prime5, n, h}
+	// here, but that's a pseudo-op that generates a load through R11.
+	MOVW prime5, prime5r
+	ADD  prime5r, n, h
+	CMP  $0, n
+	BEQ  end
+
+	// We let n go negative so we can do comparisons with SUB.S
+	// instead of separate CMP.
+	SUB.S $16, n
+	BMI   loop16done
+
+	MOVW prime1plus2, v1
+	MOVW prime2,      v2
+	MOVW $0,          v3
+	MOVW prime1minus, v4
+
+	TST $3, p
+	BNE loop16unaligned
+
+loop16aligned:
+	SUB.S $16, n
+	round16aligned
+	BPL loop16aligned
+	B   loop16finish
+
+loop16unaligned:
+	SUB.S $16, n
+	round16unaligned
+	BPL loop16unaligned
+
+loop16finish:
+	MOVW v1 @> 31, h
+	ADD  v2 @> 25, h
+	ADD  v3 @> 20, h
+	ADD  v4 @> 14, h
+
+	// h += len(input) with v2 as temporary.
+	MOVW input_len+4(FP), v2
+	ADD  v2, h
+
+loop16done:
+	ADD $16, n	// Restore number of bytes left.
+
+	SUB.S $4, n
+	MOVW  prime3, prime3r
+	BMI   loop4done
+	MOVW  prime4, prime4r
+
+	TST $3, p
+	BNE loop4unaligned
+
+loop4aligned:
+	SUB.S $4, n
+
+	MOVW.P 4(p), x1
+	MULA   prime3r, x1, h, h
+	MOVW   h @> 15, h
+	MUL    prime4r, h
+
+	BPL loop4aligned
+	B   loop4done
+
+loop4unaligned:
+	SUB.S $4, n
+
+	MOVBU.P  4(p), x1
+	MOVBU   -3(p), x2
+	ORR     x2 <<  8, x1
+	MOVBU   -2(p), x3
+	ORR     x3 << 16, x1
+	MOVBU   -1(p), x4
+	ORR     x4 << 24, x1
+
+	MULA prime3r, x1, h, h
+	MOVW h @> 15, h
+	MUL  prime4r, h
+
+	BPL loop4unaligned
+
+loop4done:
+	ADD.S $4, n	// Restore number of bytes left.
+	BEQ   end
+
+	MOVW prime5, prime5r
+
+loop1:
+	SUB.S $1, n
+
+	MOVBU.P 1(p), x1
+	MULA    prime5r, x1, h, h
+	MOVW    h @> 21, h
+	MUL     prime1r, h
+
+	BNE loop1
+
+end:
+	MOVW prime3, prime3r
+	EOR  h >> 15, h
+	MUL  prime2r, h
+	EOR  h >> 13, h
+	MUL  prime3r, h
+	EOR  h >> 16, h
+
+	MOVW h, ret+12(FP)
+	RET
+
+
+// func update(v *[4]uint64, buf *[16]byte, p []byte)
+TEXT ·update(SB), NOFRAME|NOSPLIT, $-4-20
+	MOVW    v+0(FP), p
+	MOVM.IA (p), [v1, v2, v3, v4]
+
+	MOVW prime1, prime1r
+	MOVW prime2, prime2r
+
+	// Process buf, if not nil.
+	MOVW buf+4(FP), p
+	CMP  $0, p
+	BEQ  noBuffered
+
+	round16aligned
+
+noBuffered:
+	MOVW input_base +8(FP), p
+	MOVW input_len +12(FP), n
+
+	SUB.S $16, n
+	BMI   end
+
+	TST $3, p
+	BNE loop16unaligned
+
+loop16aligned:
+	SUB.S $16, n
+	round16aligned
+	BPL loop16aligned
+	B   end
+
+loop16unaligned:
+	SUB.S $16, n
+	round16unaligned
+	BPL loop16unaligned
+
+end:
+	MOVW    v+0(FP), p
+	MOVM.IA [v1, v2, v3, v4], (p)
+	RET

vendor/github.com/pierrec/lz4/v4/internal/xxh32/xxh32zero_other.go

@@ -0,0 +1,10 @@
+// +build !arm noasm
+
+package xxh32
+
+// ChecksumZero returns the 32-bit hash of input.
+func ChecksumZero(input []byte) uint32 { return checksumZeroGo(input) }
+
+func update(v *[4]uint32, buf *[16]byte, input []byte) {
+	updateGo(v, buf, input)
+}

vendor/github.com/pierrec/lz4/v4/lz4.go

@@ -0,0 +1,147 @@
+// Package lz4 implements reading and writing lz4 compressed data.
+//
+// The package supports both the LZ4 stream format,
+// as specified in http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html,
+// and the LZ4 block format, defined at
+// http://fastcompression.blogspot.fr/2011/05/lz4-explained.html.
+//
+// See https://github.com/lz4/lz4 for the reference C implementation.
+package lz4
+
+import (
+	"github.com/pierrec/lz4/v4/internal/lz4block"
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+)
+
+func _() {
+	// Safety checks for duplicated elements.
+	var x [1]struct{}
+	_ = x[lz4block.CompressionLevel(Fast)-lz4block.Fast]
+	_ = x[Block64Kb-BlockSize(lz4block.Block64Kb)]
+	_ = x[Block256Kb-BlockSize(lz4block.Block256Kb)]
+	_ = x[Block1Mb-BlockSize(lz4block.Block1Mb)]
+	_ = x[Block4Mb-BlockSize(lz4block.Block4Mb)]
+}
+
+// CompressBlockBound returns the maximum size of a given buffer of size n, when not compressible.
+func CompressBlockBound(n int) int {
+	return lz4block.CompressBlockBound(n)
+}
+
+// UncompressBlock uncompresses the source buffer into the destination one,
+// and returns the uncompressed size.
+//
+// The destination buffer must be sized appropriately.
+//
+// An error is returned if the source data is invalid or the destination buffer is too small.
+func UncompressBlock(src, dst []byte) (int, error) {
+	return lz4block.UncompressBlock(src, dst)
+}
+
+// A Compressor compresses data into the LZ4 block format.
+// It uses a fast compression algorithm.
+//
+// A Compressor is not safe for concurrent use by multiple goroutines.
+//
+// Use a Writer to compress into the LZ4 stream format.
+type Compressor struct{ c lz4block.Compressor }
+
+// CompressBlock compresses the source buffer src into the destination dst.
+//
+// If compression is successful, the first return value is the size of the
+// compressed data, which is always >0.
+//
+// If dst has length at least CompressBlockBound(len(src)), compression always
+// succeeds. Otherwise, the first return value is zero. The error return is
+// non-nil if the compressed data does not fit in dst, but it might fit in a
+// larger buffer that is still smaller than CompressBlockBound(len(src)). The
+// return value (0, nil) means the data is likely incompressible and a buffer
+// of length CompressBlockBound(len(src)) should be passed in.
+func (c *Compressor) CompressBlock(src, dst []byte) (int, error) {
+	return c.c.CompressBlock(src, dst)
+}
+
+// CompressBlock compresses the source buffer into the destination one.
+// This is the fast version of LZ4 compression and also the default one.
+//
+// The argument hashTable is scratch space for a hash table used by the
+// compressor. If provided, it should have length at least 1<<16. If it is
+// shorter (or nil), CompressBlock allocates its own hash table.
+//
+// The size of the compressed data is returned.
+//
+// If the destination buffer size is lower than CompressBlockBound and
+// the compressed size is 0 and no error, then the data is incompressible.
+//
+// An error is returned if the destination buffer is too small.
+
+// CompressBlock is equivalent to Compressor.CompressBlock.
+// The final argument is ignored and should be set to nil.
+//
+// This function is deprecated. Use a Compressor instead.
+func CompressBlock(src, dst []byte, _ []int) (int, error) {
+	return lz4block.CompressBlock(src, dst)
+}
+
+// A CompressorHC compresses data into the LZ4 block format.
+// Its compression ratio is potentially better than that of a Compressor,
+// but it is also slower and requires more memory.
+//
+// A Compressor is not safe for concurrent use by multiple goroutines.
+//
+// Use a Writer to compress into the LZ4 stream format.
+type CompressorHC struct {
+	// Level is the maximum search depth for compression.
+	// Values <= 0 mean no maximum.
+	Level CompressionLevel
+	c     lz4block.CompressorHC
+}
+
+// CompressBlock compresses the source buffer src into the destination dst.
+//
+// If compression is successful, the first return value is the size of the
+// compressed data, which is always >0.
+//
+// If dst has length at least CompressBlockBound(len(src)), compression always
+// succeeds. Otherwise, the first return value is zero. The error return is
+// non-nil if the compressed data does not fit in dst, but it might fit in a
+// larger buffer that is still smaller than CompressBlockBound(len(src)). The
+// return value (0, nil) means the data is likely incompressible and a buffer
+// of length CompressBlockBound(len(src)) should be passed in.
+func (c *CompressorHC) CompressBlock(src, dst []byte) (int, error) {
+	return c.c.CompressBlock(src, dst, lz4block.CompressionLevel(c.Level))
+}
+
+// CompressBlockHC is equivalent to CompressorHC.CompressBlock.
+// The final two arguments are ignored and should be set to nil.
+//
+// This function is deprecated. Use a CompressorHC instead.
+func CompressBlockHC(src, dst []byte, depth CompressionLevel, _, _ []int) (int, error) {
+	return lz4block.CompressBlockHC(src, dst, lz4block.CompressionLevel(depth))
+}
+
+const (
+	// ErrInvalidSourceShortBuffer is returned by UncompressBlock or CompressBLock when a compressed
+	// block is corrupted or the destination buffer is not large enough for the uncompressed data.
+	ErrInvalidSourceShortBuffer = lz4errors.ErrInvalidSourceShortBuffer
+	// ErrInvalidFrame is returned when reading an invalid LZ4 archive.
+	ErrInvalidFrame = lz4errors.ErrInvalidFrame
+	// ErrInternalUnhandledState is an internal error.
+	ErrInternalUnhandledState = lz4errors.ErrInternalUnhandledState
+	// ErrInvalidHeaderChecksum is returned when reading a frame.
+	ErrInvalidHeaderChecksum = lz4errors.ErrInvalidHeaderChecksum
+	// ErrInvalidBlockChecksum is returned when reading a frame.
+	ErrInvalidBlockChecksum = lz4errors.ErrInvalidBlockChecksum
+	// ErrInvalidFrameChecksum is returned when reading a frame.
+	ErrInvalidFrameChecksum = lz4errors.ErrInvalidFrameChecksum
+	// ErrOptionInvalidCompressionLevel is returned when the supplied compression level is invalid.
+	ErrOptionInvalidCompressionLevel = lz4errors.ErrOptionInvalidCompressionLevel
+	// ErrOptionClosedOrError is returned when an option is applied to a closed or in error object.
+	ErrOptionClosedOrError = lz4errors.ErrOptionClosedOrError
+	// ErrOptionInvalidBlockSize is returned when
+	ErrOptionInvalidBlockSize = lz4errors.ErrOptionInvalidBlockSize
+	// ErrOptionNotApplicable is returned when trying to apply an option to an object not supporting it.
+	ErrOptionNotApplicable = lz4errors.ErrOptionNotApplicable
+	// ErrWriterNotClosed is returned when attempting to reset an unclosed writer.
+	ErrWriterNotClosed = lz4errors.ErrWriterNotClosed
+)

vendor/github.com/pierrec/lz4/v4/options.go

@@ -0,0 +1,213 @@
+package lz4
+
+import (
+	"fmt"
+	"github.com/pierrec/lz4/v4/internal/lz4block"
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+	"reflect"
+	"runtime"
+)
+
+//go:generate go run golang.org/x/tools/cmd/stringer -type=BlockSize,CompressionLevel -output options_gen.go
+
+type (
+	applier interface {
+		Apply(...Option) error
+		private()
+	}
+	// Option defines the parameters to setup an LZ4 Writer or Reader.
+	Option func(applier) error
+)
+
+// String returns a string representation of the option with its parameter(s).
+func (o Option) String() string {
+	return o(nil).Error()
+}
+
+// Default options.
+var (
+	DefaultBlockSizeOption = BlockSizeOption(Block4Mb)
+	DefaultChecksumOption  = ChecksumOption(true)
+	DefaultConcurrency     = ConcurrencyOption(1)
+	defaultOnBlockDone     = OnBlockDoneOption(nil)
+)
+
+const (
+	Block64Kb BlockSize = 1 << (16 + iota*2)
+	Block256Kb
+	Block1Mb
+	Block4Mb
+)
+
+// BlockSizeIndex defines the size of the blocks to be compressed.
+type BlockSize uint32
+
+// BlockSizeOption defines the maximum size of compressed blocks (default=Block4Mb).
+func BlockSizeOption(size BlockSize) Option {
+	return func(a applier) error {
+		switch w := a.(type) {
+		case nil:
+			s := fmt.Sprintf("BlockSizeOption(%s)", size)
+			return lz4errors.Error(s)
+		case *Writer:
+			size := uint32(size)
+			if !lz4block.IsValid(size) {
+				return fmt.Errorf("%w: %d", lz4errors.ErrOptionInvalidBlockSize, size)
+			}
+			w.frame.Descriptor.Flags.BlockSizeIndexSet(lz4block.Index(size))
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+// BlockChecksumOption enables or disables block checksum (default=false).
+func BlockChecksumOption(flag bool) Option {
+	return func(a applier) error {
+		switch w := a.(type) {
+		case nil:
+			s := fmt.Sprintf("BlockChecksumOption(%v)", flag)
+			return lz4errors.Error(s)
+		case *Writer:
+			w.frame.Descriptor.Flags.BlockChecksumSet(flag)
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+// ChecksumOption enables/disables all blocks or content checksum (default=true).
+func ChecksumOption(flag bool) Option {
+	return func(a applier) error {
+		switch w := a.(type) {
+		case nil:
+			s := fmt.Sprintf("ChecksumOption(%v)", flag)
+			return lz4errors.Error(s)
+		case *Writer:
+			w.frame.Descriptor.Flags.ContentChecksumSet(flag)
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+// SizeOption sets the size of the original uncompressed data (default=0). It is useful to know the size of the
+// whole uncompressed data stream.
+func SizeOption(size uint64) Option {
+	return func(a applier) error {
+		switch w := a.(type) {
+		case nil:
+			s := fmt.Sprintf("SizeOption(%d)", size)
+			return lz4errors.Error(s)
+		case *Writer:
+			w.frame.Descriptor.Flags.SizeSet(size > 0)
+			w.frame.Descriptor.ContentSize = size
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+// ConcurrencyOption sets the number of go routines used for compression.
+// If n <= 0, then the output of runtime.GOMAXPROCS(0) is used.
+func ConcurrencyOption(n int) Option {
+	if n <= 0 {
+		n = runtime.GOMAXPROCS(0)
+	}
+	return func(a applier) error {
+		switch rw := a.(type) {
+		case nil:
+			s := fmt.Sprintf("ConcurrencyOption(%d)", n)
+			return lz4errors.Error(s)
+		case *Writer:
+			rw.num = n
+			return nil
+		case *Reader:
+			rw.num = n
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+// CompressionLevel defines the level of compression to use. The higher the better, but slower, compression.
+type CompressionLevel uint32
+
+const (
+	Fast   CompressionLevel = 0
+	Level1 CompressionLevel = 1 << (8 + iota)
+	Level2
+	Level3
+	Level4
+	Level5
+	Level6
+	Level7
+	Level8
+	Level9
+)
+
+// CompressionLevelOption defines the compression level (default=Fast).
+func CompressionLevelOption(level CompressionLevel) Option {
+	return func(a applier) error {
+		switch w := a.(type) {
+		case nil:
+			s := fmt.Sprintf("CompressionLevelOption(%s)", level)
+			return lz4errors.Error(s)
+		case *Writer:
+			switch level {
+			case Fast, Level1, Level2, Level3, Level4, Level5, Level6, Level7, Level8, Level9:
+			default:
+				return fmt.Errorf("%w: %d", lz4errors.ErrOptionInvalidCompressionLevel, level)
+			}
+			w.level = lz4block.CompressionLevel(level)
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+func onBlockDone(int) {}
+
+// OnBlockDoneOption is triggered when a block has been processed. For a Writer, it is when is has been compressed,
+// for a Reader, it is when it has been uncompressed.
+func OnBlockDoneOption(handler func(size int)) Option {
+	if handler == nil {
+		handler = onBlockDone
+	}
+	return func(a applier) error {
+		switch rw := a.(type) {
+		case nil:
+			s := fmt.Sprintf("OnBlockDoneOption(%s)", reflect.TypeOf(handler).String())
+			return lz4errors.Error(s)
+		case *Writer:
+			rw.handler = handler
+			return nil
+		case *Reader:
+			rw.handler = handler
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}
+
+// LegacyOption provides support for writing LZ4 frames in the legacy format.
+//
+// See https://github.com/lz4/lz4/blob/dev/doc/lz4_Frame_format.md#legacy-frame.
+//
+// NB. compressed Linux kernel images use a tweaked LZ4 legacy format where
+// the compressed stream is followed by the original (uncompressed) size of
+// the kernel (https://events.static.linuxfound.org/sites/events/files/lcjpcojp13_klee.pdf).
+// This is also supported as a special case.
+func LegacyOption(legacy bool) Option {
+	return func(a applier) error {
+		switch rw := a.(type) {
+		case nil:
+			s := fmt.Sprintf("LegacyOption(%v)", legacy)
+			return lz4errors.Error(s)
+		case *Writer:
+			rw.legacy = legacy
+			return nil
+		}
+		return lz4errors.ErrOptionNotApplicable
+	}
+}

vendor/github.com/pierrec/lz4/v4/options_gen.go

@@ -0,0 +1,92 @@
+// Code generated by "stringer -type=BlockSize,CompressionLevel -output options_gen.go"; DO NOT EDIT.
+
+package lz4
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[Block64Kb-65536]
+	_ = x[Block256Kb-262144]
+	_ = x[Block1Mb-1048576]
+	_ = x[Block4Mb-4194304]
+}
+
+const (
+	_BlockSize_name_0 = "Block64Kb"
+	_BlockSize_name_1 = "Block256Kb"
+	_BlockSize_name_2 = "Block1Mb"
+	_BlockSize_name_3 = "Block4Mb"
+)
+
+func (i BlockSize) String() string {
+	switch {
+	case i == 65536:
+		return _BlockSize_name_0
+	case i == 262144:
+		return _BlockSize_name_1
+	case i == 1048576:
+		return _BlockSize_name_2
+	case i == 4194304:
+		return _BlockSize_name_3
+	default:
+		return "BlockSize(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+}
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[Fast-0]
+	_ = x[Level1-512]
+	_ = x[Level2-1024]
+	_ = x[Level3-2048]
+	_ = x[Level4-4096]
+	_ = x[Level5-8192]
+	_ = x[Level6-16384]
+	_ = x[Level7-32768]
+	_ = x[Level8-65536]
+	_ = x[Level9-131072]
+}
+
+const (
+	_CompressionLevel_name_0 = "Fast"
+	_CompressionLevel_name_1 = "Level1"
+	_CompressionLevel_name_2 = "Level2"
+	_CompressionLevel_name_3 = "Level3"
+	_CompressionLevel_name_4 = "Level4"
+	_CompressionLevel_name_5 = "Level5"
+	_CompressionLevel_name_6 = "Level6"
+	_CompressionLevel_name_7 = "Level7"
+	_CompressionLevel_name_8 = "Level8"
+	_CompressionLevel_name_9 = "Level9"
+)
+
+func (i CompressionLevel) String() string {
+	switch {
+	case i == 0:
+		return _CompressionLevel_name_0
+	case i == 512:
+		return _CompressionLevel_name_1
+	case i == 1024:
+		return _CompressionLevel_name_2
+	case i == 2048:
+		return _CompressionLevel_name_3
+	case i == 4096:
+		return _CompressionLevel_name_4
+	case i == 8192:
+		return _CompressionLevel_name_5
+	case i == 16384:
+		return _CompressionLevel_name_6
+	case i == 32768:
+		return _CompressionLevel_name_7
+	case i == 65536:
+		return _CompressionLevel_name_8
+	case i == 131072:
+		return _CompressionLevel_name_9
+	default:
+		return "CompressionLevel(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+}

vendor/github.com/pierrec/lz4/v4/reader.go

@@ -0,0 +1,243 @@
+package lz4
+
+import (
+	"io"
+
+	"github.com/pierrec/lz4/v4/internal/lz4block"
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+	"github.com/pierrec/lz4/v4/internal/lz4stream"
+)
+
+var readerStates = []aState{
+	noState:     newState,
+	errorState:  newState,
+	newState:    readState,
+	readState:   closedState,
+	closedState: newState,
+}
+
+// NewReader returns a new LZ4 frame decoder.
+func NewReader(r io.Reader) *Reader {
+	return newReader(r, false)
+}
+
+func newReader(r io.Reader, legacy bool) *Reader {
+	zr := &Reader{frame: lz4stream.NewFrame()}
+	zr.state.init(readerStates)
+	_ = zr.Apply(DefaultConcurrency, defaultOnBlockDone)
+	zr.Reset(r)
+	return zr
+}
+
+// Reader allows reading an LZ4 stream.
+type Reader struct {
+	state   _State
+	src     io.Reader        // source reader
+	num     int              // concurrency level
+	frame   *lz4stream.Frame // frame being read
+	data    []byte           // block buffer allocated in non concurrent mode
+	reads   chan []byte      // pending data
+	idx     int              // size of pending data
+	handler func(int)
+	cum     uint32
+}
+
+func (*Reader) private() {}
+
+func (r *Reader) Apply(options ...Option) (err error) {
+	defer r.state.check(&err)
+	switch r.state.state {
+	case newState:
+	case errorState:
+		return r.state.err
+	default:
+		return lz4errors.ErrOptionClosedOrError
+	}
+	for _, o := range options {
+		if err = o(r); err != nil {
+			return
+		}
+	}
+	return
+}
+
+// Size returns the size of the underlying uncompressed data, if set in the stream.
+func (r *Reader) Size() int {
+	switch r.state.state {
+	case readState, closedState:
+		if r.frame.Descriptor.Flags.Size() {
+			return int(r.frame.Descriptor.ContentSize)
+		}
+	}
+	return 0
+}
+
+func (r *Reader) isNotConcurrent() bool {
+	return r.num == 1
+}
+
+func (r *Reader) init() error {
+	data, err := r.frame.InitR(r.src, r.num)
+	if err != nil {
+		return err
+	}
+	r.reads = data
+	r.idx = 0
+	size := r.frame.Descriptor.Flags.BlockSizeIndex()
+	r.data = size.Get()
+	r.cum = 0
+	return nil
+}
+
+func (r *Reader) Read(buf []byte) (n int, err error) {
+	defer r.state.check(&err)
+	switch r.state.state {
+	case readState:
+	case closedState, errorState:
+		return 0, r.state.err
+	case newState:
+		// First initialization.
+		if err = r.init(); r.state.next(err) {
+			return
+		}
+	default:
+		return 0, r.state.fail()
+	}
+	for len(buf) > 0 {
+		var bn int
+		if r.idx == 0 {
+			if r.isNotConcurrent() {
+				bn, err = r.read(buf)
+			} else {
+				lz4block.Put(r.data)
+				r.data = <-r.reads
+				if len(r.data) == 0 {
+					// No uncompressed data: something went wrong or we are done.
+					err = r.frame.Blocks.ErrorR()
+				}
+			}
+			switch err {
+			case nil:
+			case io.EOF:
+				if er := r.frame.CloseR(r.src); er != nil {
+					err = er
+				}
+				lz4block.Put(r.data)
+				r.data = nil
+				return
+			default:
+				return
+			}
+		}
+		if bn == 0 {
+			// Fill buf with buffered data.
+			bn = copy(buf, r.data[r.idx:])
+			r.idx += bn
+			if r.idx == len(r.data) {
+				// All data read, get ready for the next Read.
+				r.idx = 0
+			}
+		}
+		buf = buf[bn:]
+		n += bn
+		r.handler(bn)
+	}
+	return
+}
+
+// read uncompresses the next block as follow:
+// - if buf has enough room, the block is uncompressed into it directly
+//   and the lenght of used space is returned
+// - else, the uncompress data is stored in r.data and 0 is returned
+func (r *Reader) read(buf []byte) (int, error) {
+	block := r.frame.Blocks.Block
+	_, err := block.Read(r.frame, r.src, r.cum)
+	if err != nil {
+		return 0, err
+	}
+	var direct bool
+	dst := r.data[:cap(r.data)]
+	if len(buf) >= len(dst) {
+		// Uncompress directly into buf.
+		direct = true
+		dst = buf
+	}
+	dst, err = block.Uncompress(r.frame, dst, true)
+	if err != nil {
+		return 0, err
+	}
+	r.cum += uint32(len(dst))
+	if direct {
+		return len(dst), nil
+	}
+	r.data = dst
+	return 0, nil
+}
+
+// Reset clears the state of the Reader r such that it is equivalent to its
+// initial state from NewReader, but instead writing to writer.
+// No access to reader is performed.
+//
+// w.Close must be called before Reset.
+func (r *Reader) Reset(reader io.Reader) {
+	if r.data != nil {
+		lz4block.Put(r.data)
+		r.data = nil
+	}
+	r.frame.Reset(r.num)
+	r.state.reset()
+	r.src = reader
+	r.reads = nil
+}
+
+// WriteTo efficiently uncompresses the data from the Reader underlying source to w.
+func (r *Reader) WriteTo(w io.Writer) (n int64, err error) {
+	switch r.state.state {
+	case closedState, errorState:
+		return 0, r.state.err
+	case newState:
+		if err = r.init(); r.state.next(err) {
+			return
+		}
+	default:
+		return 0, r.state.fail()
+	}
+	defer r.state.nextd(&err)
+
+	var data []byte
+	if r.isNotConcurrent() {
+		size := r.frame.Descriptor.Flags.BlockSizeIndex()
+		data = size.Get()
+		defer lz4block.Put(data)
+	}
+	for {
+		var bn int
+		var dst []byte
+		if r.isNotConcurrent() {
+			bn, err = r.read(data)
+			dst = data[:bn]
+		} else {
+			lz4block.Put(dst)
+			dst = <-r.reads
+			bn = len(dst)
+			if bn == 0 {
+				// No uncompressed data: something went wrong or we are done.
+				err = r.frame.Blocks.ErrorR()
+			}
+		}
+		switch err {
+		case nil:
+		case io.EOF:
+			err = r.frame.CloseR(r.src)
+			return
+		default:
+			return
+		}
+		r.handler(bn)
+		bn, err = w.Write(dst)
+		n += int64(bn)
+		if err != nil {
+			return
+		}
+	}
+}

vendor/github.com/pierrec/lz4/v4/state.go

@@ -0,0 +1,75 @@
+package lz4
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+)
+
+//go:generate go run golang.org/x/tools/cmd/stringer -type=aState -output state_gen.go
+
+const (
+	noState     aState = iota // uninitialized reader
+	errorState                // unrecoverable error encountered
+	newState                  // instantiated object
+	readState                 // reading data
+	writeState                // writing data
+	closedState               // all done
+)
+
+type (
+	aState uint8
+	_State struct {
+		states []aState
+		state  aState
+		err    error
+	}
+)
+
+func (s *_State) init(states []aState) {
+	s.states = states
+	s.state = states[0]
+}
+
+func (s *_State) reset() {
+	s.state = s.states[0]
+	s.err = nil
+}
+
+// next sets the state to the next one unless it is passed a non nil error.
+// It returns whether or not it is in error.
+func (s *_State) next(err error) bool {
+	if err != nil {
+		s.err = fmt.Errorf("%s: %w", s.state, err)
+		s.state = errorState
+		return true
+	}
+	s.state = s.states[s.state]
+	return false
+}
+
+// nextd is like next but for defers.
+func (s *_State) nextd(errp *error) bool {
+	return errp != nil && s.next(*errp)
+}
+
+// check sets s in error if not already in error and if the error is not nil or io.EOF,
+func (s *_State) check(errp *error) {
+	if s.state == errorState || errp == nil {
+		return
+	}
+	if err := *errp; err != nil {
+		s.err = fmt.Errorf("%w[%s]", err, s.state)
+		if !errors.Is(err, io.EOF) {
+			s.state = errorState
+		}
+	}
+}
+
+func (s *_State) fail() error {
+	s.state = errorState
+	s.err = fmt.Errorf("%w[%s]", lz4errors.ErrInternalUnhandledState, s.state)
+	return s.err
+}

vendor/github.com/pierrec/lz4/v4/state_gen.go

@@ -0,0 +1,28 @@
+// Code generated by "stringer -type=aState -output state_gen.go"; DO NOT EDIT.
+
+package lz4
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[noState-0]
+	_ = x[errorState-1]
+	_ = x[newState-2]
+	_ = x[readState-3]
+	_ = x[writeState-4]
+	_ = x[closedState-5]
+}
+
+const _aState_name = "noStateerrorStatenewStatereadStatewriteStateclosedState"
+
+var _aState_index = [...]uint8{0, 7, 17, 25, 34, 44, 55}
+
+func (i aState) String() string {
+	if i >= aState(len(_aState_index)-1) {
+		return "aState(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _aState_name[_aState_index[i]:_aState_index[i+1]]
+}

vendor/github.com/pierrec/lz4/v4/writer.go

@@ -0,0 +1,233 @@
+package lz4
+
+import (
+	"io"
+
+	"github.com/pierrec/lz4/v4/internal/lz4block"
+	"github.com/pierrec/lz4/v4/internal/lz4errors"
+	"github.com/pierrec/lz4/v4/internal/lz4stream"
+)
+
+var writerStates = []aState{
+	noState:     newState,
+	newState:    writeState,
+	writeState:  closedState,
+	closedState: newState,
+	errorState:  newState,
+}
+
+// NewWriter returns a new LZ4 frame encoder.
+func NewWriter(w io.Writer) *Writer {
+	zw := &Writer{frame: lz4stream.NewFrame()}
+	zw.state.init(writerStates)
+	_ = zw.Apply(DefaultBlockSizeOption, DefaultChecksumOption, DefaultConcurrency, defaultOnBlockDone)
+	zw.Reset(w)
+	return zw
+}
+
+// Writer allows writing an LZ4 stream.
+type Writer struct {
+	state   _State
+	src     io.Writer                 // destination writer
+	level   lz4block.CompressionLevel // how hard to try
+	num     int                       // concurrency level
+	frame   *lz4stream.Frame          // frame being built
+	data    []byte                    // pending data
+	idx     int                       // size of pending data
+	handler func(int)
+	legacy  bool
+}
+
+func (*Writer) private() {}
+
+func (w *Writer) Apply(options ...Option) (err error) {
+	defer w.state.check(&err)
+	switch w.state.state {
+	case newState:
+	case errorState:
+		return w.state.err
+	default:
+		return lz4errors.ErrOptionClosedOrError
+	}
+	for _, o := range options {
+		if err = o(w); err != nil {
+			return
+		}
+	}
+	w.Reset(w.src)
+	return
+}
+
+func (w *Writer) isNotConcurrent() bool {
+	return w.num == 1
+}
+
+// init sets up the Writer when in newState. It does not change the Writer state.
+func (w *Writer) init() error {
+	w.frame.InitW(w.src, w.num, w.legacy)
+	if true || !w.isNotConcurrent() {
+		size := w.frame.Descriptor.Flags.BlockSizeIndex()
+		w.data = size.Get()
+	}
+	w.idx = 0
+	return w.frame.Descriptor.Write(w.frame, w.src)
+}
+
+func (w *Writer) Write(buf []byte) (n int, err error) {
+	defer w.state.check(&err)
+	switch w.state.state {
+	case writeState:
+	case closedState, errorState:
+		return 0, w.state.err
+	case newState:
+		if err = w.init(); w.state.next(err) {
+			return
+		}
+	default:
+		return 0, w.state.fail()
+	}
+
+	zn := len(w.data)
+	for len(buf) > 0 {
+		if w.idx == 0 && len(buf) >= zn {
+			// Avoid a copy as there is enough data for a block.
+			if err = w.write(buf[:zn], false); err != nil {
+				return
+			}
+			n += zn
+			buf = buf[zn:]
+			continue
+		}
+		// Accumulate the data to be compressed.
+		m := copy(w.data[w.idx:], buf)
+		n += m
+		w.idx += m
+		buf = buf[m:]
+
+		if w.idx < len(w.data) {
+			// Buffer not filled.
+			return
+		}
+
+		// Buffer full.
+		if err = w.write(w.data, true); err != nil {
+			return
+		}
+		if !w.isNotConcurrent() {
+			size := w.frame.Descriptor.Flags.BlockSizeIndex()
+			w.data = size.Get()
+		}
+		w.idx = 0
+	}
+	return
+}
+
+func (w *Writer) write(data []byte, safe bool) error {
+	if w.isNotConcurrent() {
+		block := w.frame.Blocks.Block
+		err := block.Compress(w.frame, data, w.level).Write(w.frame, w.src)
+		w.handler(len(block.Data))
+		return err
+	}
+	c := make(chan *lz4stream.FrameDataBlock)
+	w.frame.Blocks.Blocks <- c
+	go func(c chan *lz4stream.FrameDataBlock, data []byte, safe bool) {
+		b := lz4stream.NewFrameDataBlock(w.frame)
+		c <- b.Compress(w.frame, data, w.level)
+		<-c
+		w.handler(len(b.Data))
+		b.Close(w.frame)
+		if safe {
+			// safe to put it back as the last usage of it was FrameDataBlock.Write() called before c is closed
+			lz4block.Put(data)
+		}
+	}(c, data, safe)
+
+	return nil
+}
+
+// Close closes the Writer, flushing any unwritten data to the underlying io.Writer,
+// but does not close the underlying io.Writer.
+func (w *Writer) Close() (err error) {
+	switch w.state.state {
+	case writeState:
+	case errorState:
+		return w.state.err
+	default:
+		return nil
+	}
+	defer w.state.nextd(&err)
+	if w.idx > 0 {
+		// Flush pending data, disable w.data freeing as it is done later on.
+		if err = w.write(w.data[:w.idx], false); err != nil {
+			return err
+		}
+		w.idx = 0
+	}
+	err = w.frame.CloseW(w.src, w.num)
+	// It is now safe to free the buffer.
+	if w.data != nil {
+		lz4block.Put(w.data)
+		w.data = nil
+	}
+	return
+}
+
+// Reset clears the state of the Writer w such that it is equivalent to its
+// initial state from NewWriter, but instead writing to writer.
+// Reset keeps the previous options unless overwritten by the supplied ones.
+// No access to writer is performed.
+//
+// w.Close must be called before Reset or pending data may be dropped.
+func (w *Writer) Reset(writer io.Writer) {
+	w.frame.Reset(w.num)
+	w.state.reset()
+	w.src = writer
+}
+
+// ReadFrom efficiently reads from r and compressed into the Writer destination.
+func (w *Writer) ReadFrom(r io.Reader) (n int64, err error) {
+	switch w.state.state {
+	case closedState, errorState:
+		return 0, w.state.err
+	case newState:
+		if err = w.init(); w.state.next(err) {
+			return
+		}
+	default:
+		return 0, w.state.fail()
+	}
+	defer w.state.check(&err)
+
+	size := w.frame.Descriptor.Flags.BlockSizeIndex()
+	var done bool
+	var rn int
+	data := size.Get()
+	if w.isNotConcurrent() {
+		// Keep the same buffer for the whole process.
+		defer lz4block.Put(data)
+	}
+	for !done {
+		rn, err = io.ReadFull(r, data)
+		switch err {
+		case nil:
+		case io.EOF, io.ErrUnexpectedEOF: // read may be partial
+			done = true
+		default:
+			return
+		}
+		n += int64(rn)
+		err = w.write(data[:rn], true)
+		if err != nil {
+			return
+		}
+		w.handler(rn)
+		if !done && !w.isNotConcurrent() {
+			// The buffer will be returned automatically by go routines (safe=true)
+			// so get a new one fo the next round.
+			data = size.Get()
+		}
+	}
+	err = w.Close()
+	return
+}

vendor/github.com/ssor/bom/.travis.yml

@@ -0,0 +1,14 @@
+language: go
+go:
+  - tip
+  - 1.8
+  - 1.7
+  - 1.6
+  - 1.5
+  - 1.4
+  - 1.3
+  - 1.2
+notifications:
+  email:
+    on_success: change
+    on_failure: always

vendor/github.com/ssor/bom/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Asher
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/ssor/bom/README.md

@@ -0,0 +1,23 @@
+# bom
+small tools for cleaning bom from byte array or reader
+
+
+## Installation
+
+```sh
+$ go get github.com/ssor/bom
+```
+
+## How to Use
+
+
+```
+	bs := []byte{bom0, bom1, bom2, 0x11}
+	result := CleanBom(bs)
+```
+
+```
+	bs := []byte{bom0, bom1, bom2, 0x11}
+	result := NewReaderWithoutBom(bytes.NewReader(bs))
+
+```

vendor/github.com/ssor/bom/bom.go

@@ -0,0 +1,34 @@
+package bom
+
+import (
+	"bytes"
+	"io"
+	"io/ioutil"
+)
+
+const (
+	bom0 = 0xef
+	bom1 = 0xbb
+	bom2 = 0xbf
+)
+
+// CleanBom returns b with the 3 byte BOM stripped off the front if it is present.
+// If the BOM is not present, then b is returned.
+func CleanBom(b []byte) []byte {
+	if len(b) >= 3 &&
+		b[0] == bom0 &&
+		b[1] == bom1 &&
+		b[2] == bom2 {
+		return b[3:]
+	}
+	return b
+}
+
+// NewReaderWithoutBom returns an io.Reader that will skip over initial UTF-8 byte order marks.
+func NewReaderWithoutBom(r io.Reader) (io.Reader, error) {
+	bs, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+	return bytes.NewReader(CleanBom(bs)), nil
+}

vendor/github.com/unknwon/paginater/Makefile

@@ -0,0 +1,9 @@
+.PHONY: build test vet
+
+build: vet
+
+test:
+	go test -v -cover -race
+
+vet:
+	go vet

vendor/github.com/unknwon/paginater/README.md

@@ -1,5 +1,9 @@
-Paginater [![Build Status](https://drone.io/github.com/Unknwon/paginater/status.png)](https://drone.io/github.com/Unknwon/paginater/latest) [![](http://gocover.io/_badge/github.com/Unknwon/paginater)](http://gocover.io/github.com/Unknwon/paginater)
+# Paginater
-=========
+
+[![GitHub Workflow Status](https://img.shields.io/github/workflow/status/unknwon/paginater/Go?logo=github&style=for-the-badge)](https://github.com/unknwon/paginater/actions?query=workflow%3AGo)
+[![codecov](https://img.shields.io/codecov/c/github/unknwon/paginater/master?logo=codecov&style=for-the-badge)](https://codecov.io/gh/unknwon/paginater)
+[![GoDoc](https://img.shields.io/badge/GoDoc-Reference-blue?style=for-the-badge&logo=go)](https://pkg.go.dev/github.com/unknwon/paginater?tab=doc)
+[![Sourcegraph](https://img.shields.io/badge/view%20on-Sourcegraph-brightgreen.svg?style=for-the-badge&logo=sourcegraph)](https://sourcegraph.com/github.com/unknwon/paginater)
 
 Package paginater is a helper module for custom pagination calculation.
 
@@ -21,7 +25,7 @@ func main() {
 	// - Total number of rows
 	// - Number of rows in one page
 	// - Current page number 
-	// - Number of page links
+	// - Number of page links to be displayed
 	p := paginater.New(45, 10, 3, 3)
 	
 	// Then use p as a template object named "Page" in "demo.html"

vendor/github.com/unknwon/paginater/go.mod

@@ -0,0 +1,5 @@
+module github.com/unknwon/paginater
+
+go 1.14
+
+require github.com/smartystreets/goconvey v1.6.4

vendor/github.com/unknwon/paginater/go.sum

@@ -0,0 +1,12 @@
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
+github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
+github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=

vendor/github.com/unknwon/paginater/paginater.go

@@ -96,6 +96,11 @@ func (p *Paginater) Current() int {
 	return p.current
 }
 
+// PagingNum returns number of page size.
+func (p *Paginater) PagingNum() int {
+	return p.pagingNum
+}
+
 // Page presents a page in the paginater.
 type Page struct {
 	num       int
@@ -137,7 +142,6 @@ func (p *Paginater) Pages() []*Page {
 	}
 
 	numPages := p.numPages
-	maxIdx := numPages - 1
 	offsetIdx := 0
 	hasMoreNext := false
 
@@ -156,7 +160,6 @@ func (p *Paginater) Pages() []*Page {
 	offsetVal := p.current - previousNum
 	if offsetVal > 1 {
 		numPages++
-		maxIdx++
 		offsetIdx = 1
 	}