Merge "Always drop deps from android_library with no srcs" into main am: 2201343fce am: 50225c86b6 am: 965367f3e0 am: 489210e8c4

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2765453

Change-Id: I03e16ea56aceede13bf7ae0199e5602b552c59ea
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

bp2build/aar_conversion_test.go

@@ -86,7 +86,7 @@ android_library {
 func TestConvertAndroidLibraryWithNoSources(t *testing.T) {
 	t.Helper()
 	RunBp2BuildTestCase(t, func(ctx android.RegistrationContext) {}, Bp2buildTestCase{
-		Description:                "Android Library - modules with deps must have sources",
+		Description:                "Android Library - modules will deps when there are no sources",
 		ModuleTypeUnderTest:        "android_library",
 		ModuleTypeUnderTestFactory: java.AndroidLibraryFactory,
 		Filesystem: map[string]string{
@@ -102,7 +102,18 @@ android_library {
 	sdk_version: "current",
 }
 `,
-		ExpectedBazelTargets: []string{},
+		ExpectedBazelTargets: []string{
+			MakeBazelTarget(
+				"android_library",
+				"TestLib",
+				AttrNameToString{
+					"manifest":       `"AndroidManifest.xml"`,
+					"resource_files": `["res/res.png"]`,
+					"sdk_version":    `"current"`, // use as default
+				},
+			),
+			MakeNeverlinkDuplicateTarget("android_library", "TestLib"),
+		},
 	})
 }
 

java/aar.go

@@ -1356,10 +1356,12 @@ func (a *AndroidLibrary) ConvertWithBp2build(ctx android.Bp2buildMutatorContext)
 	if !commonAttrs.Srcs.IsEmpty() {
 		deps.Append(depLabels.StaticDeps) // we should only append these if there are sources to use them
 	} else if !depLabels.Deps.IsEmpty() {
-		ctx.MarkBp2buildUnconvertible(
-			bp2build_metrics_proto.UnconvertedReasonType_UNSUPPORTED,
-			"Module has direct dependencies but no sources. Bazel will not allow this.")
-		return
+		// android_library does not accept deps when there are no srcs because
+		// there is no compilation happening, but it accepts exports.
+		// The non-empty deps here are unnecessary as deps on the android_library
+		// since they aren't being propagated to any dependencies.
+		// So we can drop deps here.
+		deps = bazel.LabelListAttribute{}
 	}
 	name := a.Name()
 	props := AndroidLibraryBazelTargetModuleProperties()