Support tagged module references

There are cases where a module needs to refer to an intermediate
output of another module instead of its final output.  For example,
a module may want to use the .jar containing .class files from
another module whose final output is a .jar containing classes.dex
files.  Support a new ":module{.tag}" format in any property that
is annotated with `android:"path"`, which will query the target
module for its ".tag" output(s).

Test: path_properties_test.go, paths_test.go
Test: no unexpected changes in build.ninja
Change-Id: Icd3c9b0d83ff125771767c04046fcffb9fc3f65a

1 files changed, 6 insertions, 2 deletions

diff --git a/java/app_test.go b/java/app_test.go
index 559afcc7d..9aedebd76 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -130,8 +130,12 @@ func TestAppSplits(t *testing.T) {
 		foo.Output(expectedOutput)
 	}
 
-	if g, w := foo.Module().(*AndroidApp).Srcs().Strings(), expectedOutputs; !reflect.DeepEqual(g, w) {
-		t.Errorf("want Srcs() = %q, got %q", w, g)
+	outputFiles, err := foo.Module().(*AndroidApp).OutputFiles("")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if g, w := outputFiles.Strings(), expectedOutputs; !reflect.DeepEqual(g, w) {
+		t.Errorf(`want OutputFiles("") = %q, got %q`, w, g)
 	}
 }