3f40fa460d
Initial build logic for building android with soong. It can build a variety of C and C++ files for arm/arm64 and host. Change-Id: I10eb37c2c2a50be6af1bb5fd568c0962b9476bf0
130 lines
2.9 KiB
Go
130 lines
2.9 KiB
Go
// Copyright 2015 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package glob
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"blueprint/deptools"
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)
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func IsGlob(glob string) bool {
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return strings.IndexAny(glob, "*?[") >= 0
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}
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// GlobWithDepFile finds all files that match glob. It compares the list of files
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// against the contents of fileListFile, and rewrites fileListFile if it has changed. It also
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// writes all of the the directories it traversed as a depenencies on fileListFile to depFile.
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//
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// The format of glob is either path/*.ext for a single directory glob, or path/**/*.ext
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// for a recursive glob.
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//
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// Returns a list of file paths, and an error.
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func GlobWithDepFile(glob, fileListFile, depFile string) (files []string, err error) {
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globPattern := filepath.Base(glob)
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globDir := filepath.Dir(glob)
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recursive := false
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if filepath.Base(globDir) == "**" {
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recursive = true
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globDir = filepath.Dir(globDir)
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}
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var dirs []string
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err = filepath.Walk(globDir,
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func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.Mode().IsDir() {
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dirs = append(dirs, path)
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if !recursive && path != globDir {
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return filepath.SkipDir
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}
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} else if info.Mode().IsRegular() {
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match, err := filepath.Match(globPattern, info.Name())
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if err != nil {
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return err
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}
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if match {
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files = append(files, path)
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}
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}
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return nil
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})
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fileList := strings.Join(files, "\n")
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writeFileIfChanged(fileListFile, []byte(fileList), 0666)
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deptools.WriteDepFile(depFile, fileListFile, dirs)
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return
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}
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func writeFileIfChanged(filename string, data []byte, perm os.FileMode) error {
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var isChanged bool
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dir := filepath.Dir(filename)
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err := os.MkdirAll(dir, 0777)
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if err != nil {
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return err
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}
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info, err := os.Stat(filename)
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if err != nil {
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if os.IsNotExist(err) {
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// The file does not exist yet.
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isChanged = true
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} else {
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return err
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}
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} else {
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if info.Size() != int64(len(data)) {
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isChanged = true
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} else {
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oldData, err := ioutil.ReadFile(filename)
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if err != nil {
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return err
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}
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if len(oldData) != len(data) {
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isChanged = true
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} else {
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for i := range data {
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if oldData[i] != data[i] {
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isChanged = true
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break
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}
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}
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}
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}
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}
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if isChanged {
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err = ioutil.WriteFile(filename, data, perm)
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if err != nil {
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return err
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}
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}
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return nil
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}
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