Remove the dependency on a number of env vars.

This is so that the way soong_build is invoked is simpler, which is in
turn useful so that it can be invoked multiple times within a single
build, which in turn will be used to invoke bp2build routinely (as
opposed to manually when needed)

Test: Presubmits.
Change-Id: Iddaebb05ff7bcedc0db8273192bb31284b739920

cmd/soong_build/main.go

@@ -75,8 +75,8 @@ func newContext(configuration android.Config, prepareBuildActions bool) *android
 	return ctx
 }
 
-func newConfig(srcDir string) android.Config {
+func newConfig(srcDir, outDir string) android.Config {
-	configuration, err := android.NewConfig(srcDir, bootstrap.CmdlineBuildDir(), bootstrap.CmdlineModuleListFile())
+	configuration, err := android.NewConfig(srcDir, outDir, bootstrap.CmdlineModuleListFile())
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "%s", err)
 		os.Exit(1)
@@ -127,7 +127,7 @@ func runSoongDocs(configuration android.Config, extraNinjaDeps []string) {
 }
 
 func writeMetrics(configuration android.Config) {
-	metricsFile := filepath.Join(bootstrap.CmdlineBuildDir(), "soong_build_metrics.pb")
+	metricsFile := filepath.Join(configuration.BuildDir(), "soong_build_metrics.pb")
 	err := android.WriteMetrics(configuration, metricsFile)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error writing soong_build metrics %s: %s", metricsFile, err)
@@ -193,7 +193,7 @@ func main() {
 	usedVariablesFile := shared.JoinPath(outDir, "soong.environment.used")
 	// The top-level Blueprints file is passed as the first argument.
 	srcDir := filepath.Dir(flag.Arg(0))
-	configuration := newConfig(srcDir)
+	configuration := newConfig(srcDir, outDir)
 	extraNinjaDeps := []string{
 		configuration.ProductVariablesFileName,
 		shared.JoinPath(outDir, "soong.environment.used"),
@@ -203,10 +203,6 @@ func main() {
 		configuration.SetAllowMissingDependencies()
 	}
 
-	// These two are here so that we restart a non-debugged soong_build when the
-	// user sets SOONG_DELVE the first time.
-	configuration.Getenv("SOONG_DELVE")
-	configuration.Getenv("SOONG_DELVE_PATH")
 	if shared.IsDebugging() {
 		// Add a non-existent file to the dependencies so that soong_build will rerun when the debugger is
 		// enabled even if it completed successfully.

ui/build/soong.go

@@ -104,6 +104,11 @@ func bootstrapBlueprint(ctx Context, config Config) {
 	args.GlobFile = shared.JoinPath(config.SoongOutDir(), ".bootstrap/soong-build-globs.ninja")
 	args.GeneratingPrimaryBuilder = true
 
+	args.DelveListen = os.Getenv("SOONG_DELVE")
+	if args.DelveListen != "" {
+		args.DelvePath = shared.ResolveDelveBinary()
+	}
+
 	blueprintCtx := blueprint.NewContext()
 	blueprintCtx.SetIgnoreUnknownModuleTypes(true)
 	blueprintConfig := BlueprintConfig{
@@ -138,11 +143,6 @@ func runSoong(ctx Context, config Config) {
 
 	soongBuildEnv := config.Environment().Copy()
 	soongBuildEnv.Set("TOP", os.Getenv("TOP"))
-	// These two dependencies are read from bootstrap.go, but also need to be here
-	// so that soong_build can declare a dependency on them
-	soongBuildEnv.Set("SOONG_DELVE", os.Getenv("SOONG_DELVE"))
-	soongBuildEnv.Set("SOONG_DELVE_PATH", os.Getenv("SOONG_DELVE_PATH"))
-	soongBuildEnv.Set("SOONG_OUTDIR", config.SoongOutDir())
 	// For Bazel mixed builds.
 	soongBuildEnv.Set("BAZEL_PATH", "./tools/bazel")
 	soongBuildEnv.Set("BAZEL_HOME", filepath.Join(config.BazelOutDir(), "bazelhome"))
@@ -215,13 +215,6 @@ func runSoong(ctx Context, config Config) {
 		// This is currently how the command line to invoke soong_build finds the
 		// root of the source tree and the output root
 		ninjaEnv.Set("TOP", os.Getenv("TOP"))
-		ninjaEnv.Set("SOONG_OUTDIR", config.SoongOutDir())
-
-		// For debugging
-		if os.Getenv("SOONG_DELVE") != "" {
-			ninjaEnv.Set("SOONG_DELVE", os.Getenv("SOONG_DELVE"))
-			ninjaEnv.Set("SOONG_DELVE_PATH", shared.ResolveDelveBinary())
-		}
 
 		cmd.Environment = &ninjaEnv
 		cmd.Sandbox = soongSandbox