Rename build.ninja with product name

Current build.ninja does not contain any product name, while other ninja
files (such as combined ninja) do. This change adds product name to the
build.ninja so it can be separated over multiple lunch targets

Bug: 277029044
Test: build succeeded and checked if out/soong/build.ninja has been
renamed

Change-Id: I16dc71f829fd76f01b98da0d509a8e0ef6f62fa9

android/config.go

@@ -83,6 +83,7 @@ type CmdArgs struct {
 	RunGoTests     bool
 	OutDir         string
 	SoongOutDir    string
+	SoongVariables string
 
 	SymlinkForestMarker string
 	Bp2buildMarker      string
@@ -491,7 +492,7 @@ func NullConfig(outDir, soongOutDir string) Config {
 func NewConfig(cmdArgs CmdArgs, availableEnv map[string]string) (Config, error) {
 	// Make a config with default options.
 	config := &config{
-		ProductVariablesFileName: filepath.Join(cmdArgs.SoongOutDir, productVariablesFileName),
+		ProductVariablesFileName: cmdArgs.SoongVariables,
 
 		env: availableEnv,
 

cmd/soong_build/main.go

@@ -78,6 +78,7 @@ func init() {
 	flag.StringVar(&cmdlineArgs.Bp2buildMarker, "bp2build_marker", "", "If set, run bp2build, touch the specified marker file then exit")
 	flag.StringVar(&cmdlineArgs.SymlinkForestMarker, "symlink_forest_marker", "", "If set, create the bp2build symlink forest, touch the specified marker file, then exit")
 	flag.StringVar(&cmdlineArgs.OutFile, "o", "build.ninja", "the Ninja file to output")
+	flag.StringVar(&cmdlineArgs.SoongVariables, "soong_variables", "soong.variables", "the file contains all build variables")
 	flag.StringVar(&cmdlineArgs.BazelForceEnabledModules, "bazel-force-enabled-modules", "", "additional modules to build with Bazel. Comma-delimited")
 	flag.BoolVar(&cmdlineArgs.EmptyNinjaFile, "empty-ninja-file", false, "write out a 0-byte ninja file")
 	flag.BoolVar(&cmdlineArgs.MultitreeBuild, "multitree-build", false, "this is a multitree build")
@@ -517,6 +518,8 @@ func main() {
 
 	var finalOutputFile string
 
+	writeSymlink := false
+
 	// Run Soong for a specific activity, like bp2build, queryview
 	// or the actual Soong build for the build.ninja file.
 	switch configuration.BuildMode {
@@ -539,8 +542,13 @@ func main() {
 					maybeQuit(err, "")
 				}
 			}
+			writeSymlink = true
 		} else {
 			finalOutputFile = runSoongOnlyBuild(ctx, extraNinjaDeps)
+
+			if configuration.BuildMode == android.AnalysisNoBazel {
+				writeSymlink = true
+			}
 		}
 		writeMetrics(configuration, ctx.EventHandler, metricsDir)
 	}
@@ -551,6 +559,24 @@ func main() {
 	// are ninja inputs to the main output file, then ninja would superfluously
 	// rebuild this output file on the next build invocation.
 	touch(shared.JoinPath(topDir, finalOutputFile))
+
+	// TODO(b/277029044): Remove this function once build.<product>.ninja lands
+	if writeSymlink {
+		writeBuildNinjaSymlink(configuration, finalOutputFile)
+	}
+}
+
+// TODO(b/277029044): Remove this function once build.<product>.ninja lands
+func writeBuildNinjaSymlink(config android.Config, source string) {
+	targetPath := shared.JoinPath(topDir, config.SoongOutDir(), "build.ninja")
+	sourcePath := shared.JoinPath(topDir, source)
+
+	if targetPath == sourcePath {
+		return
+	}
+
+	os.Remove(targetPath)
+	os.Symlink(sourcePath, targetPath)
 }
 
 func writeUsedEnvironmentFile(configuration android.Config) {

ui/build/config.go

@@ -1229,6 +1229,13 @@ func (c *configImpl) TargetProduct() string {
 	panic("TARGET_PRODUCT is not defined")
 }
 
+func (c *configImpl) TargetProductOrErr() (string, error) {
+	if v, ok := c.environ.Get("TARGET_PRODUCT"); ok {
+		return v, nil
+	}
+	return "", fmt.Errorf("TARGET_PRODUCT is not defined")
+}
+
 func (c *configImpl) TargetDevice() string {
 	return c.targetDevice
 }
@@ -1554,11 +1561,21 @@ func (c *configImpl) KatiPackageNinjaFile() string {
 }
 
 func (c *configImpl) SoongVarsFile() string {
+	targetProduct, err := c.TargetProductOrErr()
+	if err != nil {
 		return filepath.Join(c.SoongOutDir(), "soong.variables")
+	} else {
+		return filepath.Join(c.SoongOutDir(), "soong."+targetProduct+".variables")
+	}
 }
 
 func (c *configImpl) SoongNinjaFile() string {
+	targetProduct, err := c.TargetProductOrErr()
+	if err != nil {
 		return filepath.Join(c.SoongOutDir(), "build.ninja")
+	} else {
+		return filepath.Join(c.SoongOutDir(), "build."+targetProduct+".ninja")
+	}
 }
 
 func (c *configImpl) CombinedNinjaFile() string {

ui/build/soong.go

@@ -235,7 +235,7 @@ func bootstrapEpochCleanup(ctx Context, config Config) {
 	} else if !exists {
 		// The tree is out of date for the current epoch, delete files used by bootstrap
 		// and force the primary builder to rerun.
-		os.Remove(filepath.Join(config.SoongOutDir(), "build.ninja"))
+		os.Remove(config.SoongNinjaFile())
 		for _, globFile := range bootstrapGlobFileList(config) {
 			os.Remove(globFile)
 		}
@@ -263,7 +263,9 @@ func bootstrapBlueprint(ctx Context, config Config) {
 	// Clean up some files for incremental builds across incompatible changes.
 	bootstrapEpochCleanup(ctx, config)
 
-	mainSoongBuildExtraArgs := []string{"-o", config.SoongNinjaFile()}
+	baseArgs := []string{"--soong_variables", config.SoongVarsFile()}
+
+	mainSoongBuildExtraArgs := append(baseArgs, "-o", config.SoongNinjaFile())
 	if config.EmptyNinjaFile() {
 		mainSoongBuildExtraArgs = append(mainSoongBuildExtraArgs, "--empty-ninja-file")
 	}
@@ -310,45 +312,55 @@ func bootstrapBlueprint(ctx Context, config Config) {
 			description: fmt.Sprintf("converting Android.bp files to BUILD files at %s/bp2build", config.SoongOutDir()),
 			config:      config,
 			output:      config.Bp2BuildFilesMarkerFile(),
-			specificArgs: []string{"--bp2build_marker", config.Bp2BuildFilesMarkerFile()},
+			specificArgs: append(baseArgs,
+				"--bp2build_marker", config.Bp2BuildFilesMarkerFile(),
+			),
 		},
 		{
 			name:        bp2buildWorkspaceTag,
 			description: "Creating Bazel symlink forest",
 			config:      config,
 			output:      config.Bp2BuildWorkspaceMarkerFile(),
-			specificArgs: []string{"--symlink_forest_marker", config.Bp2BuildWorkspaceMarkerFile()},
+			specificArgs: append(baseArgs,
+				"--symlink_forest_marker", config.Bp2BuildWorkspaceMarkerFile(),
+			),
 		},
 		{
 			name:        jsonModuleGraphTag,
 			description: fmt.Sprintf("generating the Soong module graph at %s", config.ModuleGraphFile()),
 			config:      config,
 			output:      config.ModuleGraphFile(),
-			specificArgs: []string{
+			specificArgs: append(baseArgs,
 				"--module_graph_file", config.ModuleGraphFile(),
 				"--module_actions_file", config.ModuleActionsFile(),
-			},
+			),
 		},
 		{
 			name:        queryviewTag,
 			description: fmt.Sprintf("generating the Soong module graph as a Bazel workspace at %s", queryviewDir),
 			config:      config,
 			output:      config.QueryviewMarkerFile(),
-			specificArgs: []string{"--bazel_queryview_dir", queryviewDir},
+			specificArgs: append(baseArgs,
+				"--bazel_queryview_dir", queryviewDir,
+			),
 		},
 		{
 			name:        apiBp2buildTag,
 			description: fmt.Sprintf("generating BUILD files for API contributions at %s", apiBp2buildDir),
 			config:      config,
 			output:      config.ApiBp2buildMarkerFile(),
-			specificArgs: []string{"--bazel_api_bp2build_dir", apiBp2buildDir},
+			specificArgs: append(baseArgs,
+				"--bazel_api_bp2build_dir", apiBp2buildDir,
+			),
 		},
 		{
 			name:        soongDocsTag,
 			description: fmt.Sprintf("generating Soong docs at %s", config.SoongDocsHtml()),
 			config:      config,
 			output:      config.SoongDocsHtml(),
-			specificArgs: []string{"--soong_docs", config.SoongDocsHtml()},
+			specificArgs: append(baseArgs,
+				"--soong_docs", config.SoongDocsHtml(),
+			),
 		},
 	}