Fix excluding resource directories

Using a glob as a path failed the existence check.  Append the
glob after converting the path to a string.

Test: TestExcludeResources in java_test.go
Change-Id: Ic1fd40aa283f3b0d59c1c589dbeec411583eddf1

java/java_test.go

@@ -96,6 +96,8 @@ func testJava(t *testing.T, bp string) *android.TestContext {
 		"b.jar":      nil,
 		"res/a":      nil,
 		"res/b":      nil,
+		"res2/a":     nil,
+
 		"prebuilts/sdk/14/android.jar":    nil,
 		"prebuilts/sdk/14/framework.aidl": nil,
 	})
@@ -434,6 +436,42 @@ func TestResources(t *testing.T) {
 	}
 }
 
+func TestExcludeResources(t *testing.T) {
+	ctx := testJava(t, `
+		java_library {
+			name: "foo",
+			srcs: ["a.java"],
+			java_resource_dirs: ["res", "res2"],
+			exclude_java_resource_dirs: ["res2"],
+		}
+
+		java_library {
+			name: "bar",
+			srcs: ["a.java"],
+			java_resources: ["res/*"],
+			exclude_java_resources: ["res/b"],
+		}
+	`)
+
+	fooRes := ctx.ModuleForTests("foo", "android_common").Output("res.jar")
+
+	expected := "-C res -l " + fooRes.Implicits[0].String()
+	if fooRes.Args["jarArgs"] != expected {
+		t.Errorf("foo resource jar args %q is not %q",
+			fooRes.Args["jarArgs"], expected)
+
+	}
+
+	barRes := ctx.ModuleForTests("bar", "android_common").Output("res.jar")
+
+	expected = "-C . -f res/a"
+	if barRes.Args["jarArgs"] != expected {
+		t.Errorf("bar resource jar args %q is not %q",
+			barRes.Args["jarArgs"], expected)
+
+	}
+}
+
 func fail(t *testing.T, errs []error) {
 	if len(errs) > 0 {
 		for _, err := range errs {

java/resources.go

@@ -47,7 +47,8 @@ func ResourceDirsToJarArgs(ctx android.ModuleContext,
 	var excludes []string
 
 	for _, exclude := range excludeDirs {
-		excludes = append(excludes, android.PathForModuleSrc(ctx, exclude, "**/*").String())
+		excludes = append(excludes,
+			filepath.Join(android.PathForModuleSrc(ctx, exclude).String(), "**/*"))
 	}
 
 	excludes = append(excludes, resourceExcludes...)