62 lines
2.1 KiB
Go
62 lines
2.1 KiB
Go
// 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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"fmt"
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"os"
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)
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// The Bazel bp2build code generator 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 Codegen(ctx *CodegenContext) CodegenMetrics {
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outputDir := android.PathForOutput(ctx, "bp2build")
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android.RemoveAllOutputDir(outputDir)
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ruleShims := CreateRuleShims(android.ModuleTypeFactories())
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buildToTargets, metrics := GenerateBazelTargets(ctx)
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filesToWrite := CreateBazelFiles(ruleShims, buildToTargets, ctx.mode)
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for _, f := range filesToWrite {
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if err := writeFile(outputDir, ctx, f); err != nil {
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fmt.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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return metrics
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}
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func writeFile(outputDir android.OutputPath, ctx android.PathContext, f BazelFile) error {
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return writeReadOnlyFile(ctx, getOutputPath(outputDir, ctx, f.Dir), f.Basename, f.Contents)
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}
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func getOutputPath(outputDir android.OutputPath, ctx android.PathContext, dir string) android.OutputPath {
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return outputDir.Join(ctx, dir)
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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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