| // Copyright (C) 2015 The Android Open Source Project |
| // |
| // 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 maker |
| |
| import ( |
| "io/ioutil" |
| "log" |
| "os" |
| "time" |
| ) |
| |
| // File returns an Entity that represents a file. The entities name will be the |
| // absolute path of the file. The entity map will be checked for a matching file |
| // entry and if one is not found, a new one will be added and returned. |
| func File(path ...string) *file { |
| abs, err := OSPath(path...) |
| if err != nil { |
| log.Fatalf("%s", err) |
| } |
| e := FindEntity(abs) |
| if e != nil { |
| f, is := e.(*file) |
| if !is { |
| log.Fatalf("%s is not a file entity (%T)", abs, e) |
| } |
| return f |
| } |
| f := &file{abs: abs} |
| f.stat, _ = os.Stat(f.abs) |
| AddEntity(f) |
| return f |
| } |
| |
| // Dir returns an Entity that represents a directory. The entities name will be |
| // the absolute path of the directory. The entity map will be checked for a |
| // matching directory entry and if one is not found, a new one will be added and |
| // returned. |
| // It also adds the rules to create the directory if needed. |
| func Dir(path ...string) *file { |
| d := File(path...) |
| if Creator(d) == nil { |
| NewStep(makeDir).Creates(d) |
| } |
| return d |
| } |
| |
| // DirOf attempts to make a Dir for the parent of the specified File. |
| func DirOf(path interface{}) *file { |
| switch path := path.(type) { |
| case string: |
| return dirOf(path) |
| case *file: |
| return dirOf(path.Name()) |
| default: |
| log.Fatalf("cannot get parent dir from %T", path) |
| return nil |
| } |
| } |
| |
| // FilesOf reads the list of files in path, filters them with the supplied |
| // filter and returns the set of file entities that matched. |
| func FilesOf(path string, filter func(os.FileInfo) bool) []*file { |
| dir := Dir(path) |
| infos, _ := ioutil.ReadDir(dir.Name()) |
| files := []*file{} |
| for _, i := range infos { |
| if filter(i) { |
| files = append(files, File(dir.Name(), i.Name())) |
| } |
| } |
| return files |
| } |
| |
| // IsFile returns true if the supplied entity is of file type. |
| func IsFile(e Entity) bool { |
| _, is := e.(*file) |
| return is |
| } |
| |
| type file struct { |
| abs string |
| stat os.FileInfo |
| } |
| |
| // Name returns the full absolute path to the file. |
| func (f *file) Name() string { return f.abs } |
| |
| // String returns the Name of the file. |
| func (f *file) String() string { return f.abs } |
| |
| // Exists returns true if the file could be statted. |
| func (f *file) Exists() bool { return f.stat != nil } |
| |
| // Timestamp returns the last modified time reported by the file system. |
| func (f *file) Timestamp() time.Time { |
| if f.stat == nil { |
| return time.Time{} |
| } |
| return f.stat.ModTime() |
| } |
| |
| // NeedsUpdate returns true if the file does not exist, or is older than the |
| // supplied timestamp. |
| func (f *file) NeedsUpdate(t time.Time) bool { |
| if f.stat == nil { |
| return true |
| } |
| return f.stat.ModTime().Before(t) |
| } |
| |
| // Updated refreshes the exists and timestamp information for the file. |
| func (f *file) Updated() { f.stat, _ = os.Stat(f.abs) } |
| |
| func dirOf(name string) *file { |
| path, _ := PathSplit(name) |
| if len(path) == 0 { |
| return nil |
| } |
| return Dir(path) |
| } |
| |
| func makeDir(s *Step) error { |
| for _, out := range s.outputs { |
| if err := os.MkdirAll(out.Name(), os.ModePerm); err != nil { |
| return err |
| } |
| } |
| return nil |
| } |