Handle product vars *flags props in cc* modules

Test: build/bazel/ci/bp2build.sh
Bug: 188497994
Change-Id: Ifb379e370075d6a7bc55b82d79c210c31ef377e9

bazel/properties.go

@@ -993,6 +993,6 @@ func TryVariableSubstitutions(slice []string, productVariable string) ([]string,
 // TryVariableSubstitution, replace string substitution formatting within s with Starlark
 // string.format compatible tag for productVariable.
 func TryVariableSubstitution(s string, productVariable string) (string, bool) {
-	sub := productVariableSubstitutionPattern.ReplaceAllString(s, "{"+productVariable+"}")
+	sub := productVariableSubstitutionPattern.ReplaceAllString(s, "$("+productVariable+")")
 	return sub, s != sub
 }

bp2build/cc_library_static_conversion_test.go

@@ -1412,3 +1412,37 @@ cc_library_static {
 )`},
 	})
 }
+
+func TestCcLibraryStaticProductVariableStringReplacement(t *testing.T) {
+	runCcLibraryStaticTestCase(t, bp2buildTestCase{
+		description:                        "cc_library_static product variable selects",
+		moduleTypeUnderTest:                "cc_library_static",
+		moduleTypeUnderTestFactory:         cc.LibraryStaticFactory,
+		moduleTypeUnderTestBp2BuildMutator: cc.CcLibraryStaticBp2Build,
+		depsMutators:                       []android.RegisterMutatorFunc{cc.RegisterDepsBp2Build},
+		filesystem:                         map[string]string{},
+		blueprint: soongCcLibraryStaticPreamble + `
+cc_library_static {
+    name: "foo_static",
+    srcs: ["common.c"],
+    product_variables: {
+      platform_sdk_version: {
+          asflags: ["-DPLATFORM_SDK_VERSION=%d"],
+      },
+    },
+} `,
+		expectedBazelTargets: []string{`cc_library_static(
+    name = "foo_static",
+    asflags = select({
+        "//build/bazel/product_variables:platform_sdk_version": ["-DPLATFORM_SDK_VERSION=$(Platform_sdk_version)"],
+        "//conditions:default": [],
+    }),
+    copts = [
+        "-I.",
+        "-I$(BINDIR)/.",
+    ],
+    linkstatic = True,
+    srcs_c = ["common.c"],
+)`},
+	})
+}

bp2build/cc_object_conversion_test.go

@@ -210,7 +210,7 @@ func TestCcObjectProductVariable(t *testing.T) {
 		expectedBazelTargets: []string{`cc_object(
     name = "foo",
     asflags = select({
-        "//build/bazel/product_variables:platform_sdk_version": ["-DPLATFORM_SDK_VERSION={Platform_sdk_version}"],
+        "//build/bazel/product_variables:platform_sdk_version": ["-DPLATFORM_SDK_VERSION=$(Platform_sdk_version)"],
         "//conditions:default": [],
     }),
     copts = ["-fno-addrsig"],

cc/bp2build.go

@@ -19,6 +19,8 @@ import (
 
 	"android/soong/android"
 	"android/soong/bazel"
+
+	"github.com/google/blueprint/proptools"
 )
 
 // bp2build functions and helpers for converting cc_* modules to Bazel.
@@ -444,18 +446,25 @@ func bp2BuildParseCompilerProps(ctx android.TopDownMutatorContext, module *Modul
 		}
 	}
 
+	productVarPropNameToAttribute := map[string]*bazel.StringListAttribute{
+		"Cflags":   &copts,
+		"Asflags":  &asFlags,
+		"CppFlags": &cppFlags,
+	}
 	productVariableProps := android.ProductVariableProperties(ctx)
-	if props, exists := productVariableProps["Cflags"]; exists {
-		for _, prop := range props {
-			flags, ok := prop.Property.([]string)
-			if !ok {
-				ctx.ModuleErrorf("Could not convert product variable cflag property")
+	for propName, attr := range productVarPropNameToAttribute {
+		if props, exists := productVariableProps[propName]; exists {
+			for _, prop := range props {
+				flags, ok := prop.Property.([]string)
+				if !ok {
+					ctx.ModuleErrorf("Could not convert product variable %s property", proptools.PropertyNameForField(propName))
+				}
+				newFlags, _ := bazel.TryVariableSubstitutions(flags, prop.ProductConfigVariable)
+				attr.ProductValues = append(attr.ProductValues, bazel.ProductVariableValues{
+					ProductVariable: prop.ProductConfigVariable,
+					Values:          newFlags,
+				})
 			}
-			newFlags, _ := bazel.TryVariableSubstitutions(flags, prop.ProductConfigVariable)
-			copts.ProductValues = append(copts.ProductValues, bazel.ProductVariableValues{
-				ProductVariable: prop.ProductConfigVariable,
-				Values:          newFlags,
-			})
 		}
 	}
 

cc/object.go

@@ -157,8 +157,6 @@ func ObjectBp2Build(ctx android.TopDownMutatorContext) {
 
 	// Set arch-specific configurable attributes
 	compilerAttrs := bp2BuildParseCompilerProps(ctx, m)
-	var asFlags bazel.StringListAttribute
-
 	var deps bazel.LabelListAttribute
 	for _, props := range m.linker.linkerProps() {
 		if objectLinkerProps, ok := props.(*ObjectLinkerProperties); ok {
@@ -167,24 +165,6 @@ func ObjectBp2Build(ctx android.TopDownMutatorContext) {
 		}
 	}
 
-	productVariableProps := android.ProductVariableProperties(ctx)
-	if props, exists := productVariableProps["Asflags"]; exists {
-		// TODO(b/183595873): consider deduplicating handling of product variable properties
-		for _, prop := range props {
-			flags, ok := prop.Property.([]string)
-			if !ok {
-				ctx.ModuleErrorf("Could not convert product variable asflag property")
-				return
-			}
-			newFlags, _ := bazel.TryVariableSubstitutions(flags, prop.ProductConfigVariable)
-			asFlags.ProductValues = append(asFlags.ProductValues, bazel.ProductVariableValues{
-				ProductVariable: prop.ProductConfigVariable,
-				Values:          newFlags,
-			})
-		}
-	}
-	// TODO(b/183595872) warn/error if we're not handling product variables
-
 	// Don't split cc_object srcs across languages. Doing so would add complexity,
 	// and this isn't typically done for cc_object.
 	srcs := compilerAttrs.srcs
@@ -195,7 +175,7 @@ func ObjectBp2Build(ctx android.TopDownMutatorContext) {
 		Srcs:    srcs,
 		Deps:    deps,
 		Copts:   compilerAttrs.copts,
-		Asflags: asFlags,
+		Asflags: compilerAttrs.asFlags,
 	}
 
 	props := bazel.BazelTargetModuleProperties{