Integrate gen_notice with Make for dist.

Most exempt module types have no output. Support exempt module types
with output by requiring they must be 0p and have no license metadata.

Disallow `licenses: []` property on gen_notice.

Test: m cts dist

Change-Id: Ic992bd6420fa6898495866eac43495002ef4b6c8
Merged-in: Ic992bd6420fa6898495866eac43495002ef4b6c8

android/androidmk.go

@@ -366,7 +366,9 @@ func (a *AndroidMkEntries) getDistContributions(mod blueprint.Module) *distContr
 	// Collate the contributions this module makes to the dist.
 	distContributions := &distContributions{}
 
-	distContributions.licenseMetadataFile = amod.licenseMetadataFile
+	if !exemptFromRequiredApplicableLicensesProperty(mod.(Module)) {
+		distContributions.licenseMetadataFile = amod.licenseMetadataFile
+	}
 
 	// Iterate over this module's dist structs, merged from the dist and dists properties.
 	for _, dist := range amod.Dists() {
@@ -458,10 +460,12 @@ func generateDistContributionsForMake(distContributions *distContributions) []st
 		ret = append(ret, fmt.Sprintf(".PHONY: %s\n", d.goals))
 		// Create dist-for-goals calls for each of the copy instructions.
 		for _, c := range d.copies {
-			ret = append(
-				ret,
-				fmt.Sprintf("$(if $(strip $(ALL_TARGETS.%s.META_LIC)),,$(eval ALL_TARGETS.%s.META_LIC := %s))\n",
-					c.from.String(), c.from.String(), distContributions.licenseMetadataFile.String()))
+			if distContributions.licenseMetadataFile != nil {
+				ret = append(
+					ret,
+					fmt.Sprintf("$(if $(strip $(ALL_TARGETS.%s.META_LIC)),,$(eval ALL_TARGETS.%s.META_LIC := %s))\n",
+						c.from.String(), c.from.String(), distContributions.licenseMetadataFile.String()))
+			}
 			ret = append(
 				ret,
 				fmt.Sprintf("$(call dist-for-goals,%s,%s:%s)\n", d.goals, c.from.String(), c.dest))

android/gen_notice.go

@@ -111,6 +111,9 @@ type genNoticeModule struct {
 }
 
 func (m *genNoticeModule) DepsMutator(ctx BottomUpMutatorContext) {
+	if ctx.ContainsProperty("licenses") {
+		ctx.PropertyErrorf("licenses", "not supported on \"gen_notice\" modules")
+	}
 	if proptools.Bool(m.properties.Html) && proptools.Bool(m.properties.Xml) {
 		ctx.ModuleErrorf("can be html or xml but not both")
 	}
@@ -195,6 +198,16 @@ func (m *genNoticeModule) OutputFiles(tag string) (Paths, error) {
 	return nil, fmt.Errorf("unrecognized tag %q", tag)
 }
 
+var _ AndroidMkEntriesProvider = (*genNoticeModule)(nil)
+
+// Implements AndroidMkEntriesProvider
+func (m *genNoticeModule) AndroidMkEntries() []AndroidMkEntries {
+	return []AndroidMkEntries{AndroidMkEntries{
+		Class:      "ETC",
+		OutputFile: OptionalPathForPath(m.output),
+	}}
+}
+
 // missingReferencesRule emits an ErrorRule for missing module references.
 func missingReferencesRule(ctx BuilderContext, m *genNoticeModule) {
 	if len(m.missing) < 1 {

android/gen_notice_test.go

@@ -11,6 +11,19 @@ var genNoticeTests = []struct {
 	fs             MockFS
 	expectedErrors []string
 }{
+	{
+		name: "gen_notice must not accept licenses property",
+		fs: map[string][]byte{
+			"top/Android.bp": []byte(`
+				gen_notice {
+					name: "top_license",
+					licenses: ["other_license"],
+				}`),
+		},
+		expectedErrors: []string{
+			`not supported on "gen_notice" modules`,
+		},
+	},
 	{
 		name: "bad gen_notice",
 		fs: map[string][]byte{