Add bazel paths to ninja deps.

Test: m nothing
Test: m nothing --bazel-mode-dev
Change-Id: I120e62ac3f2aa066aedaecf2a5d16c79f7097c76

android/bazel_handler.go

@@ -172,12 +172,13 @@ type bazelRunner interface {
 }
 
 type bazelPaths struct {
-	homeDir      string
-	bazelPath    string
-	outputBase   string
-	workspaceDir string
-	soongOutDir  string
-	metricsDir   string
+	homeDir       string
+	bazelPath     string
+	outputBase    string
+	workspaceDir  string
+	soongOutDir   string
+	metricsDir    string
+	bazelDepsFile string
 }
 
 // A context object which tracks queued requests that need to be made to Bazel,
@@ -424,6 +425,11 @@ func bazelPathsFromConfig(c *config) (*bazelPaths, error) {
 	} else {
 		missingEnvVars = append(missingEnvVars, "BAZEL_METRICS_DIR")
 	}
+	if len(c.Getenv("BAZEL_DEPS_FILE")) > 1 {
+		p.bazelDepsFile = c.Getenv("BAZEL_DEPS_FILE")
+	} else {
+		missingEnvVars = append(missingEnvVars, "BAZEL_DEPS_FILE")
+	}
 	if len(missingEnvVars) > 0 {
 		return nil, errors.New(fmt.Sprintf("missing required env vars to use bazel: %s", missingEnvVars))
 	} else {

cmd/soong_build/main.go

@@ -167,10 +167,15 @@ func runMixedModeBuild(configuration android.Config, ctx *android.Context, extra
 		return configuration.BazelContext.InvokeBazel(configuration)
 	}
 	ctx.SetBeforePrepareBuildActionsHook(bazelHook)
-
 	ninjaDeps := bootstrap.RunBlueprint(cmdlineArgs, bootstrap.DoEverything, ctx.Context, configuration)
 	ninjaDeps = append(ninjaDeps, extraNinjaDeps...)
 
+	bazelPaths, err := readBazelPaths(configuration)
+	if err != nil {
+		panic("Bazel deps file not found: " + err.Error())
+	}
+	ninjaDeps = append(ninjaDeps, bazelPaths...)
+
 	globListFiles := writeBuildGlobsNinjaFile(ctx, configuration.SoongOutDir(), configuration)
 	ninjaDeps = append(ninjaDeps, globListFiles...)
 
@@ -699,3 +704,14 @@ func writeBp2BuildMetrics(codegenMetrics *bp2build.CodegenMetrics,
 	}
 	codegenMetrics.Write(metricsDir)
 }
+
+func readBazelPaths(configuration android.Config) ([]string, error) {
+	depsPath := configuration.Getenv("BAZEL_DEPS_FILE")
+
+	data, err := os.ReadFile(depsPath)
+	if err != nil {
+		return nil, err
+	}
+	paths := strings.Split(strings.TrimSpace(string(data)), "\n")
+	return paths, nil
+}

ui/build/soong.go

@@ -404,6 +404,7 @@ func runSoong(ctx Context, config Config) {
 	soongBuildEnv.Set("BAZEL_WORKSPACE", absPath(ctx, "."))
 	soongBuildEnv.Set("BAZEL_METRICS_DIR", config.BazelMetricsDir())
 	soongBuildEnv.Set("LOG_DIR", config.LogsDir())
+	soongBuildEnv.Set("BAZEL_DEPS_FILE", filepath.Join(os.Getenv("TOP"), config.OutDir(), "tools", "bazel.list"))
 
 	// For Soong bootstrapping tests
 	if os.Getenv("ALLOW_MISSING_DEPENDENCIES") == "true" {