| // 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" |
| ) |
| |
| 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) { |
| globPattern := filepath.Base(glob) |
| globDir := filepath.Dir(glob) |
| recursive := false |
| |
| if filepath.Base(globDir) == "**" { |
| recursive = true |
| globDir = filepath.Dir(globDir) |
| } |
| |
| var dirs []string |
| |
| err = filepath.Walk(globDir, |
| func(path string, info os.FileInfo, err error) error { |
| if err != nil { |
| return err |
| } |
| |
| if info.Mode().IsDir() { |
| dirs = append(dirs, path) |
| if !recursive && path != globDir { |
| return filepath.SkipDir |
| } |
| } else if info.Mode().IsRegular() { |
| match, err := filepath.Match(globPattern, info.Name()) |
| if err != nil { |
| return err |
| } |
| if match { |
| for _, e := range excludes { |
| var excludeMatch bool |
| if filepath.Base(e) == e { |
| excludeMatch, err = filepath.Match(e, info.Name()) |
| } else { |
| excludeMatch, err = filepath.Match(e, path) |
| } |
| if err != nil { |
| return err |
| } |
| if excludeMatch { |
| return nil |
| } |
| } |
| files = append(files, path) |
| } |
| } |
| |
| return nil |
| }) |
| |
| 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 |
| } |