78 lines
2.5 KiB
Go
78 lines
2.5 KiB
Go
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// Copyright 2020 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 bp2build
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import (
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"android/soong/android"
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"os"
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)
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// The Bazel bp2build singleton is responsible for writing .bzl files that are equivalent to
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// Android.bp files that are capable of being built with Bazel.
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func init() {
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android.RegisterBazelConverterPreSingletonType("androidbp_to_build", AndroidBpToBuildSingleton)
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}
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func AndroidBpToBuildSingleton() android.Singleton {
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return &androidBpToBuildSingleton{
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name: "bp2build",
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}
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}
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type androidBpToBuildSingleton struct {
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name string
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outputDir android.OutputPath
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}
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func (s *androidBpToBuildSingleton) GenerateBuildActions(ctx android.SingletonContext) {
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s.outputDir = android.PathForOutput(ctx, s.name)
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android.RemoveAllOutputDir(s.outputDir)
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if !ctx.Config().IsEnvTrue("CONVERT_TO_BAZEL") {
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return
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}
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ruleShims := CreateRuleShims(android.ModuleTypeFactories())
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buildToTargets := GenerateSoongModuleTargets(ctx)
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filesToWrite := CreateBazelFiles(ruleShims, buildToTargets)
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for _, f := range filesToWrite {
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if err := s.writeFile(ctx, f); err != nil {
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ctx.Errorf("Failed to write %q (dir %q) due to %q", f.Basename, f.Dir, err)
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}
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}
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}
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func (s *androidBpToBuildSingleton) getOutputPath(ctx android.PathContext, dir string) android.OutputPath {
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return s.outputDir.Join(ctx, dir)
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}
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func (s *androidBpToBuildSingleton) writeFile(ctx android.PathContext, f BazelFile) error {
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return writeReadOnlyFile(ctx, s.getOutputPath(ctx, f.Dir), f.Basename, f.Contents)
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}
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// The auto-conversion directory should be read-only, sufficient for bazel query. The files
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// are not intended to be edited by end users.
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func writeReadOnlyFile(ctx android.PathContext, dir android.OutputPath, baseName, content string) error {
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android.CreateOutputDirIfNonexistent(dir, os.ModePerm)
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pathToFile := dir.Join(ctx, baseName)
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// 0444 is read-only
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err := android.WriteFileToOutputDir(pathToFile, []byte(content), 0444)
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return err
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}
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