101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package glob
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"github.com/google/blueprint/deptools"
|
|
"github.com/google/blueprint/pathtools"
|
|
)
|
|
|
|
func IsGlob(glob string) bool {
|
|
return strings.IndexAny(glob, "*?[") >= 0
|
|
}
|
|
|
|
// GlobWithDepFile finds all files that match glob. It compares the list of files
|
|
// against the contents of fileListFile, and rewrites fileListFile if it has changed. It also
|
|
// writes all of the the directories it traversed as a depenencies on fileListFile to depFile.
|
|
//
|
|
// The format of glob is either path/*.ext for a single directory glob, or path/**/*.ext
|
|
// for a recursive glob.
|
|
//
|
|
// Returns a list of file paths, and an error.
|
|
func GlobWithDepFile(glob, fileListFile, depFile string, excludes []string) (files []string, err error) {
|
|
files, dirs, err := pathtools.GlobWithExcludes(glob, excludes)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
fileList := strings.Join(files, "\n") + "\n"
|
|
|
|
writeFileIfChanged(fileListFile, []byte(fileList), 0666)
|
|
deptools.WriteDepFile(depFile, fileListFile, dirs)
|
|
|
|
return
|
|
}
|
|
|
|
func writeFileIfChanged(filename string, data []byte, perm os.FileMode) error {
|
|
var isChanged bool
|
|
|
|
dir := filepath.Dir(filename)
|
|
err := os.MkdirAll(dir, 0777)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
info, err := os.Stat(filename)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
// The file does not exist yet.
|
|
isChanged = true
|
|
} else {
|
|
return err
|
|
}
|
|
} else {
|
|
if info.Size() != int64(len(data)) {
|
|
isChanged = true
|
|
} else {
|
|
oldData, err := ioutil.ReadFile(filename)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(oldData) != len(data) {
|
|
isChanged = true
|
|
} else {
|
|
for i := range data {
|
|
if oldData[i] != data[i] {
|
|
isChanged = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if isChanged {
|
|
err = ioutil.WriteFile(filename, data, perm)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|