Merge "Reorganize soong_build/main.go ."
This commit is contained in:
Lukács T. Berki
Gerrit Code Review
commit
c5b3a1722c
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@ -24,7 +24,6 @@ import (
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"time"
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"android/soong/shared"
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"github.com/google/blueprint/bootstrap"
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"android/soong/android"
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@ -65,16 +64,10 @@ func newNameResolver(config android.Config) *android.NameResolver {
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return android.NewNameResolver(exportFilter)
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}
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// bazelConversionRequested checks that the user is intending to convert
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// Blueprint to Bazel BUILD files.
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func bazelConversionRequested(configuration android.Config) bool {
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return configuration.IsEnvTrue("GENERATE_BAZEL_FILES")
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}
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func newContext(configuration android.Config) *android.Context {
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func newContext(configuration android.Config, prepareBuildActions bool) *android.Context {
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ctx := android.NewContext(configuration)
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ctx.Register()
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if !shouldPrepareBuildActions(configuration) {
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if !prepareBuildActions {
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configuration.SetStopBefore(bootstrap.StopBeforePrepareBuildActions)
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}
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ctx.SetNameInterface(newNameResolver(configuration))
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@ -91,6 +84,84 @@ func newConfig(srcDir string) android.Config {
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return configuration
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}
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// Bazel-enabled mode. Soong runs in two passes.
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// First pass: Analyze the build tree, but only store all bazel commands
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// needed to correctly evaluate the tree in the second pass.
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// TODO(cparsons): Don't output any ninja file, as the second pass will overwrite
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// the incorrect results from the first pass, and file I/O is expensive.
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func runMixedModeBuild(configuration android.Config, firstCtx *android.Context, extraNinjaDeps []string) {
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configuration.SetStopBefore(bootstrap.StopBeforeWriteNinja)
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bootstrap.Main(firstCtx.Context, configuration, false, extraNinjaDeps...)
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// Invoke bazel commands and save results for second pass.
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if err := configuration.BazelContext.InvokeBazel(); err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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// Second pass: Full analysis, using the bazel command results. Output ninja file.
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secondPassConfig, err := android.ConfigForAdditionalRun(configuration)
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if err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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secondCtx := newContext(secondPassConfig, true)
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bootstrap.Main(secondCtx.Context, secondPassConfig, false, extraNinjaDeps...)
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}
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// Run the code-generation phase to convert BazelTargetModules to BUILD files.
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func runQueryView(configuration android.Config, ctx *android.Context) {
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codegenContext := bp2build.NewCodegenContext(configuration, *ctx, bp2build.QueryView)
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absoluteQueryViewDir := shared.JoinPath(topDir, bazelQueryViewDir)
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if err := createBazelQueryView(codegenContext, absoluteQueryViewDir); err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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}
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func runSoongDocs(configuration android.Config, extraNinjaDeps []string) {
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ctx := newContext(configuration, false)
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bootstrap.Main(ctx.Context, configuration, false, extraNinjaDeps...)
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if err := writeDocs(ctx, configuration, docFile); err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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}
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func writeMetrics(configuration android.Config) {
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metricsFile := filepath.Join(bootstrap.CmdlineBuildDir(), "soong_build_metrics.pb")
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err := android.WriteMetrics(configuration, metricsFile)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error writing soong_build metrics %s: %s", metricsFile, err)
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os.Exit(1)
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}
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}
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func doChosenActivity(configuration android.Config, extraNinjaDeps []string) {
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bazelConversionRequested := configuration.IsEnvTrue("GENERATE_BAZEL_FILES")
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mixedModeBuild := configuration.BazelContext.BazelEnabled()
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generateQueryView := bazelQueryViewDir != ""
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if bazelConversionRequested {
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// Run the alternate pipeline of bp2build mutators and singleton to convert
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// Blueprint to BUILD files before everything else.
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runBp2Build(configuration, extraNinjaDeps)
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return
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}
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ctx := newContext(configuration, !generateQueryView)
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if mixedModeBuild {
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runMixedModeBuild(configuration, ctx, extraNinjaDeps)
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} else {
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bootstrap.Main(ctx.Context, configuration, false, extraNinjaDeps...)
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}
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// Convert the Soong module graph into Bazel BUILD files.
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if generateQueryView {
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runQueryView(configuration, ctx)
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return
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}
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writeMetrics(configuration)
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}
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func main() {
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flag.Parse()
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@ -101,7 +172,6 @@ func main() {
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usedVariablesFile := shared.JoinPath(outDir, "soong.environment.used")
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// The top-level Blueprints file is passed as the first argument.
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srcDir := filepath.Dir(flag.Arg(0))
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var ctx *android.Context
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configuration := newConfig(srcDir)
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extraNinjaDeps := []string{
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configuration.ProductVariablesFileName,
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@ -122,72 +192,17 @@ func main() {
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extraNinjaDeps = append(extraNinjaDeps, filepath.Join(configuration.BuildDir(), "always_rerun_for_delve"))
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}
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bazelConversionRequested := bazelConversionRequested(configuration)
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if bazelConversionRequested {
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// Run the alternate pipeline of bp2build mutators and singleton to convert Blueprint to BUILD files
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// before everything else.
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runBp2Build(srcDir, configuration, extraNinjaDeps)
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} else if configuration.BazelContext.BazelEnabled() {
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// Bazel-enabled mode. Soong runs in two passes.
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// First pass: Analyze the build tree, but only store all bazel commands
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// needed to correctly evaluate the tree in the second pass.
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// TODO(cparsons): Don't output any ninja file, as the second pass will overwrite
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// the incorrect results from the first pass, and file I/O is expensive.
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firstCtx := newContext(configuration)
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configuration.SetStopBefore(bootstrap.StopBeforeWriteNinja)
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bootstrap.Main(firstCtx.Context, configuration, false, extraNinjaDeps...)
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// Invoke bazel commands and save results for second pass.
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if err := configuration.BazelContext.InvokeBazel(); err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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// Second pass: Full analysis, using the bazel command results. Output ninja file.
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secondPassConfig, err := android.ConfigForAdditionalRun(configuration)
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if err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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ctx = newContext(secondPassConfig)
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bootstrap.Main(ctx.Context, secondPassConfig, false, extraNinjaDeps...)
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} else {
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ctx = newContext(configuration)
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bootstrap.Main(ctx.Context, configuration, false, extraNinjaDeps...)
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if docFile != "" {
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// We don't write an used variables file when generating documentation
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// because that is done from within the actual builds as a Ninja action and
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// thus it would overwrite the actual used variables file so this is
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// special-cased.
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runSoongDocs(configuration, extraNinjaDeps)
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return
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}
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// Convert the Soong module graph into Bazel BUILD files.
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if !bazelConversionRequested && bazelQueryViewDir != "" {
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// Run the code-generation phase to convert BazelTargetModules to BUILD files.
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codegenContext := bp2build.NewCodegenContext(configuration, *ctx, bp2build.QueryView)
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absoluteQueryViewDir := shared.JoinPath(topDir, bazelQueryViewDir)
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if err := createBazelQueryView(codegenContext, absoluteQueryViewDir); err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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}
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if !bazelConversionRequested && docFile != "" {
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if err := writeDocs(ctx, configuration, docFile); err != nil {
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fmt.Fprintf(os.Stderr, "%s", err)
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os.Exit(1)
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}
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}
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// TODO(ccross): make this a command line argument. Requires plumbing through blueprint
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// to affect the command line of the primary builder.
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if !bazelConversionRequested && shouldPrepareBuildActions(configuration) {
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metricsFile := filepath.Join(bootstrap.CmdlineBuildDir(), "soong_build_metrics.pb")
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err := android.WriteMetrics(configuration, metricsFile)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error writing soong_build metrics %s: %s", metricsFile, err)
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os.Exit(1)
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}
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}
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if docFile == "" {
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// Let's not overwrite the used variables file when generating
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// documentation
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writeUsedVariablesFile(shared.JoinPath(topDir, usedVariablesFile), configuration)
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}
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doChosenActivity(configuration, extraNinjaDeps)
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writeUsedVariablesFile(shared.JoinPath(topDir, usedVariablesFile), configuration)
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}
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func writeUsedVariablesFile(path string, configuration android.Config) {
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@ -218,7 +233,7 @@ func writeUsedVariablesFile(path string, configuration android.Config) {
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// Run Soong in the bp2build mode. This creates a standalone context that registers
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// an alternate pipeline of mutators and singletons specifically for generating
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// Bazel BUILD files instead of Ninja files.
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func runBp2Build(srcDir string, configuration android.Config, extraNinjaDeps []string) {
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func runBp2Build(configuration android.Config, extraNinjaDeps []string) {
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// Register an alternate set of singletons and mutators for bazel
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// conversion for Bazel conversion.
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bp2buildCtx := android.NewContext(configuration)
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@ -233,7 +248,7 @@ func runBp2Build(srcDir string, configuration android.Config, extraNinjaDeps []s
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// configurations or variables, since those will generate different BUILD
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// files based on how the user has configured their tree.
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bp2buildCtx.SetModuleListFile(bootstrap.CmdlineModuleListFile())
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modulePaths, err := bp2buildCtx.ListModulePaths(srcDir)
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modulePaths, err := bp2buildCtx.ListModulePaths(configuration.SrcDir())
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if err != nil {
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panic(err)
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}
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@ -283,20 +298,3 @@ func runBp2Build(srcDir string, configuration android.Config, extraNinjaDeps []s
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[]byte(fmt.Sprintf("%s: \\\n %s\n", ninjaFileName, extraNinjaDepsString)),
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0666)
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}
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// shouldPrepareBuildActions reads configuration and flags if build actions
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// should be generated.
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func shouldPrepareBuildActions(configuration android.Config) bool {
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// Generating Soong docs
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if docFile != "" {
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return false
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}
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// Generating a directory for Soong query (queryview)
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if bazelQueryViewDir != "" {
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return false
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}
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// Generating a directory for converted Bazel BUILD files
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return !bazelConversionRequested(configuration)
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}
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