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Reduce calls to git cat-file -s (#14682) 

* Reduce calls to git cat-file -s

There are multiple places where there are repeated calls to git cat-file
-s due to the blobs not being created with their size.

Through judicious use of git ls-tree -l and slight adjustments to the
indexer code we can avoid a lot of these calls.

* simplify by always expecting the long format

* Also always set the sized field and tell the indexer the update is sized
This commit is contained in:
zeripath 2021-02-17 21:32:25 +00:00 committed by GitHub
parent 7ba158183a
commit ae7e6cd474
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 141 additions and 28 deletions
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16
modules/git/parse_gogit.go
View File

@ -10,12 +10,13 @@ import (
"bytes"
"fmt"
"strconv"
"strings"
"github.com/go-git/go-git/v5/plumbing/filemode"
"github.com/go-git/go-git/v5/plumbing/object"
)
// ParseTreeEntries parses the output of a `git ls-tree` command.
// ParseTreeEntries parses the output of a `git ls-tree -l` command.
func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
return parseTreeEntries(data, nil)
}
@ -23,7 +24,7 @@ func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
entries := make([]*TreeEntry, 0, 10)
for pos := 0; pos < len(data); {
// expect line to be of the form "<mode> <type> <sha>\t<filename>"
// expect line to be of the form "<mode> <type> <sha> <space-padded-size>\t<filename>"
entry := new(TreeEntry)
entry.gogitTreeEntry = &object.TreeEntry{}
entry.ptree = ptree
@ -61,7 +62,16 @@ func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
entry.gogitTreeEntry.Hash = id
pos += 41 // skip over sha and trailing space
end := pos + bytes.IndexByte(data[pos:], '\n')
end := pos + bytes.IndexByte(data[pos:], '\t')
if end < pos {
return nil, fmt.Errorf("Invalid ls-tree -l output: %s", string(data))
}
entry.size, _ = strconv.ParseInt(strings.TrimSpace(string(data[pos:end])), 10, 64)
entry.sized = true
pos = end + 1
end = pos + bytes.IndexByte(data[pos:], '\n')
if end < pos {
return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
}

13
modules/git/parse_gogit_test.go
View File

@ -24,7 +24,7 @@ func TestParseTreeEntries(t *testing.T) {
Expected: []*TreeEntry{},
},
{
Input: "100644 blob 61ab7345a1a3bbc590068ccae37b8515cfc5843c\texample/file2.txt\n",
Input: "100644 blob 61ab7345a1a3bbc590068ccae37b8515cfc5843c 1022\texample/file2.txt\n",
Expected: []*TreeEntry{
{
ID: MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
@ -33,12 +33,14 @@ func TestParseTreeEntries(t *testing.T) {
Name: "example/file2.txt",
Mode: filemode.Regular,
},
size: 1022,
sized: true,
},
},
},
{
Input: "120000 blob 61ab7345a1a3bbc590068ccae37b8515cfc5843c\t\"example/\\n.txt\"\n" +
"040000 tree 1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8\texample\n",
Input: "120000 blob 61ab7345a1a3bbc590068ccae37b8515cfc5843c 234131\t\"example/\\n.txt\"\n" +
"040000 tree 1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8 -\texample\n",
Expected: []*TreeEntry{
{
ID: MustIDFromString("61ab7345a1a3bbc590068ccae37b8515cfc5843c"),
@ -47,9 +49,12 @@ func TestParseTreeEntries(t *testing.T) {
Name: "example/\n.txt",
Mode: filemode.Symlink,
},
size: 234131,
sized: true,
},
{
ID: MustIDFromString("1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8"),
ID: MustIDFromString("1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8"),
sized: true,
gogitTreeEntry: &object.TreeEntry{
Hash: MustIDFromString("1d01fb729fb0db5881daaa6030f9f2d3cd3d5ae8"),
Name: "example",

16
modules/git/parse_nogogit.go
View File

@ -10,9 +10,10 @@ import (
"bytes"
"fmt"
"strconv"
"strings"
)
// ParseTreeEntries parses the output of a `git ls-tree` command.
// ParseTreeEntries parses the output of a `git ls-tree -l` command.
func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
return parseTreeEntries(data, nil)
}
@ -20,7 +21,7 @@ func ParseTreeEntries(data []byte) ([]*TreeEntry, error) {
func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
entries := make([]*TreeEntry, 0, 10)
for pos := 0; pos < len(data); {
// expect line to be of the form "<mode> <type> <sha>\t<filename>"
// expect line to be of the form "<mode> <type> <sha> <space-padded-size>\t<filename>"
entry := new(TreeEntry)
entry.ptree = ptree
if pos+6 > len(data) {
@ -56,7 +57,16 @@ func parseTreeEntries(data []byte, ptree *Tree) ([]*TreeEntry, error) {
entry.ID = id
pos += 41 // skip over sha and trailing space
end := pos + bytes.IndexByte(data[pos:], '\n')
end := pos + bytes.IndexByte(data[pos:], '\t')
if end < pos {
return nil, fmt.Errorf("Invalid ls-tree -l output: %s", string(data))
}
entry.size, _ = strconv.ParseInt(strings.TrimSpace(string(data[pos:end])), 10, 64)
entry.sized = true
pos = end + 1
end = pos + bytes.IndexByte(data[pos:], '\n')
if end < pos {
return nil, fmt.Errorf("Invalid ls-tree output: %s", string(data))
}

70
modules/git/parse_nogogit_test.go Normal file
View File

@ -0,0 +1,70 @@
// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// +build !gogit
package git
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestParseTreeEntries(t *testing.T) {
testCases := []struct {
Input string
Expected []*TreeEntry
}{
{
Input: `100644 blob ea0d83c9081af9500ac9f804101b3fd0a5c293af 8218 README.md
100644 blob 037f27dc9d353ae4fd50f0474b2194c593914e35 4681 README_ZH.md
100644 blob 9846a94f7e8350a916632929d0fda38c90dd2ca8 429 SECURITY.md
040000 tree 84b90550547016f73c5dd3f50dea662389e67b6d - assets
`,
Expected: []*TreeEntry{
{
ID: MustIDFromString("ea0d83c9081af9500ac9f804101b3fd0a5c293af"),
name: "README.md",
entryMode: EntryModeBlob,
size: 8218,
sized: true,
},
{
ID: MustIDFromString("037f27dc9d353ae4fd50f0474b2194c593914e35"),
name: "README_ZH.md",
entryMode: EntryModeBlob,
size: 4681,
sized: true,
},
{
ID: MustIDFromString("9846a94f7e8350a916632929d0fda38c90dd2ca8"),
name: "SECURITY.md",
entryMode: EntryModeBlob,
size: 429,
sized: true,
},
{
ID: MustIDFromString("84b90550547016f73c5dd3f50dea662389e67b6d"),
name: "assets",
entryMode: EntryModeTree,
sized: true,
},
},
},
}
for _, testCase := range testCases {
entries, err := ParseTreeEntries([]byte(testCase.Input))
assert.NoError(t, err)
assert.EqualValues(t, len(testCase.Expected), len(entries))
for i, entry := range entries {
assert.EqualValues(t, testCase.Expected[i].ID, entry.ID)
assert.EqualValues(t, testCase.Expected[i].name, entry.name)
assert.EqualValues(t, testCase.Expected[i].entryMode, entry.entryMode)
assert.EqualValues(t, testCase.Expected[i].sized, entry.sized)
assert.EqualValues(t, testCase.Expected[i].size, entry.size)
}
}
}

2
modules/git/tree_entry_nogogit.go
View File

@ -87,5 +87,7 @@ func (te *TreeEntry) Blob() *Blob {
ID: te.ID,
repoPath: te.ptree.repo.Path,
name: te.Name(),
size: te.size,
gotSize: te.sized,
}
}

4
modules/git/tree_nogogit.go
View File

@ -32,7 +32,7 @@ func (t *Tree) ListEntries() (Entries, error) {
return t.entries, nil
}
stdout, err := NewCommand("ls-tree", t.ID.String()).RunInDirBytes(t.repo.Path)
stdout, err := NewCommand("ls-tree", "-l", t.ID.String()).RunInDirBytes(t.repo.Path)
if err != nil {
if strings.Contains(err.Error(), "fatal: Not a valid object name") || strings.Contains(err.Error(), "fatal: not a tree object") {
return nil, ErrNotExist{
@ -55,7 +55,7 @@ func (t *Tree) ListEntriesRecursive() (Entries, error) {
if t.entriesRecursiveParsed {
return t.entriesRecursive, nil
}
stdout, err := NewCommand("ls-tree", "-t", "-r", t.ID.String()).RunInDirBytes(t.repo.Path)
stdout, err := NewCommand("ls-tree", "-t", "-l", "-r", t.ID.String()).RunInDirBytes(t.repo.Path)
if err != nil {
return nil, err
}

20
modules/indexer/code/bleve.go
View File

@ -179,14 +179,20 @@ func (b *BleveIndexer) addUpdate(commitSha string, update fileUpdate, repo *mode
return nil
}
stdout, err := git.NewCommand("cat-file", "-s", update.BlobSha).
RunInDir(repo.RepoPath())
if err != nil {
return err
size := update.Size
if !update.Sized {
stdout, err := git.NewCommand("cat-file", "-s", update.BlobSha).
RunInDir(repo.RepoPath())
if err != nil {
return err
}
if size, err = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64); err != nil {
return fmt.Errorf("Misformatted git cat-file output: %v", err)
}
}
if size, err := strconv.Atoi(strings.TrimSpace(stdout)); err != nil {
return fmt.Errorf("Misformatted git cat-file output: %v", err)
} else if int64(size) > setting.Indexer.MaxIndexerFileSize {
if size > setting.Indexer.MaxIndexerFileSize {
return b.addDelete(update.Filename, repo, batch)
}

20
modules/indexer/code/elastic_search.go
View File

@ -178,14 +178,20 @@ func (b *ElasticSearchIndexer) addUpdate(sha string, update fileUpdate, repo *mo
return nil, nil
}
stdout, err := git.NewCommand("cat-file", "-s", update.BlobSha).
RunInDir(repo.RepoPath())
if err != nil {
return nil, err
size := update.Size
if !update.Sized {
stdout, err := git.NewCommand("cat-file", "-s", update.BlobSha).
RunInDir(repo.RepoPath())
if err != nil {
return nil, err
}
if size, err = strconv.ParseInt(strings.TrimSpace(stdout), 10, 64); err != nil {
return nil, fmt.Errorf("Misformatted git cat-file output: %v", err)
}
}
if size, err := strconv.Atoi(strings.TrimSpace(stdout)); err != nil {
return nil, fmt.Errorf("Misformatted git cat-file output: %v", err)
} else if int64(size) > setting.Indexer.MaxIndexerFileSize {
if size > setting.Indexer.MaxIndexerFileSize {
return []elastic.BulkableRequest{b.addDelete(update.Filename, repo)}, nil
}

8
modules/indexer/code/git.go
View File

@ -17,6 +17,8 @@ import (
type fileUpdate struct {
Filename string
BlobSha string
Size int64
Sized bool
}
// repoChanges changes (file additions/updates/removals) to a repo
@ -77,6 +79,8 @@ func parseGitLsTreeOutput(stdout []byte) ([]fileUpdate, error) {
updates[idxCount] = fileUpdate{
Filename: entry.Name(),
BlobSha: entry.ID.String(),
Size: entry.Size(),
Sized: true,
}
idxCount++
}
@ -87,7 +91,7 @@ func parseGitLsTreeOutput(stdout []byte) ([]fileUpdate, error) {
// genesisChanges get changes to add repo to the indexer for the first time
func genesisChanges(repo *models.Repository, revision string) (*repoChanges, error) {
var changes repoChanges
stdout, err := git.NewCommand("ls-tree", "--full-tree", "-r", revision).
stdout, err := git.NewCommand("ls-tree", "--full-tree", "-l", "-r", revision).
RunInDirBytes(repo.RepoPath())
if err != nil {
return nil, err
@ -162,7 +166,7 @@ func nonGenesisChanges(repo *models.Repository, revision string) (*repoChanges,
}
}
cmd := git.NewCommand("ls-tree", "--full-tree", revision, "--")
cmd := git.NewCommand("ls-tree", "--full-tree", "-l", revision, "--")
cmd.AddArguments(updatedFilenames...)
lsTreeStdout, err := cmd.RunInDirBytes(repo.RepoPath())
if err != nil {