Respect package boundaries in bp2build conversion of go modules

bp2build's codegen context does not implement
BazelPathConversionContext. To reuse the utility function
transformPackagePaths, update its signature

(Also make deps of go_library unique to make the conversion resilient)

Test: go test ./bp2build
Change-Id: I126b1057d2b26bc6c7d3be2780f1b62d28323cf0
diff --git a/bp2build/build_conversion.go b/bp2build/build_conversion.go
index 9921a7f..a817386 100644
--- a/bp2build/build_conversion.go
+++ b/bp2build/build_conversion.go
@@ -302,21 +302,25 @@
 
 // helper function to return labels for srcs used in bootstrap_go_package and bootstrap_go_binary
 // this function has the following limitations which make it unsuitable for widespread use
-// 1. wildcard patterns in srcs
-// 2. package boundary violations
-// (1) is ok for go since build/blueprint does not support it. (2) _might_ be ok too.
+// - wildcard patterns in srcs
+// This is ok for go since build/blueprint does not support it.
 //
 // Prefer to use `BazelLabelForModuleSrc` instead
-func goSrcLabels(srcs []string, linuxSrcs, darwinSrcs []string) bazel.LabelListAttribute {
+func goSrcLabels(cfg android.Config, moduleDir string, srcs []string, linuxSrcs, darwinSrcs []string) bazel.LabelListAttribute {
 	labels := func(srcs []string) bazel.LabelList {
 		ret := []bazel.Label{}
 		for _, src := range srcs {
 			srcLabel := bazel.Label{
-				Label: ":" + src, // TODO - b/284483729: Fix for possible package boundary violations
+				Label: src,
 			}
 			ret = append(ret, srcLabel)
 		}
-		return bazel.MakeLabelList(ret)
+		// Respect package boundaries
+		return android.TransformSubpackagePaths(
+			cfg,
+			moduleDir,
+			bazel.MakeLabelList(ret),
+		)
 	}
 
 	ret := bazel.LabelListAttribute{}
@@ -371,8 +375,11 @@
 		Importpath: bazel.StringAttribute{
 			Value: proptools.StringPtr(g.GoPkgPath()),
 		},
-		Srcs:                   goSrcLabels(g.Srcs(), g.LinuxSrcs(), g.DarwinSrcs()),
-		Deps:                   goDepLabels(transitiveDeps, goModulesMap),
+		Srcs: goSrcLabels(ctx.Config(), ctx.ModuleDir(g), g.Srcs(), g.LinuxSrcs(), g.DarwinSrcs()),
+		Deps: goDepLabels(
+			android.FirstUniqueStrings(transitiveDeps),
+			goModulesMap,
+		),
 		Target_compatible_with: targetNotCompatibleWithAndroid(),
 	}
 
@@ -444,7 +451,7 @@
 	transitiveDeps := transitiveGoDeps(g.Deps(), goModulesMap)
 
 	ga := goAttributes{
-		Srcs:                   goSrcLabels(g.Srcs(), g.LinuxSrcs(), g.DarwinSrcs()),
+		Srcs:                   goSrcLabels(ctx.Config(), ctx.ModuleDir(g), g.Srcs(), g.LinuxSrcs(), g.DarwinSrcs()),
 		Deps:                   goDepLabels(transitiveDeps, goModulesMap),
 		Target_compatible_with: targetNotCompatibleWithAndroid(),
 	}
diff --git a/bp2build/go_conversion_test.go b/bp2build/go_conversion_test.go
index a872fc7..507fbf0 100644
--- a/bp2build/go_conversion_test.go
+++ b/bp2build/go_conversion_test.go
@@ -75,11 +75,11 @@
 				"deps":       `["//bar:bar"]`,
 				"importpath": `"android/foo"`,
 				"srcs": `[
-        ":foo1.go",
-        ":foo2.go",
+        "foo1.go",
+        "foo2.go",
     ] + select({
-        "//build/bazel/platforms/os:darwin": [":foo_darwin.go"],
-        "//build/bazel/platforms/os:linux_glibc": [":foo_linux.go"],
+        "//build/bazel/platforms/os:darwin": ["foo_darwin.go"],
+        "//build/bazel/platforms/os:linux_glibc": ["foo_linux.go"],
         "//conditions:default": [],
     })`,
 			},
@@ -118,7 +118,31 @@
         "//bar:bar",
         "//bar:baz",
     ]`,
-				"srcs": `[":main.go"]`,
+				"srcs": `["main.go"]`,
+			},
+			android.HostSupported,
+		)},
+	})
+}
+
+func TestConvertGoBinaryWithSrcInDifferentPackage(t *testing.T) {
+	bp := `
+blueprint_go_binary {
+	name: "foo",
+	srcs: ["subdir/main.go"],
+}
+`
+	t.Parallel()
+	runGoTests(t, Bp2buildTestCase{
+		Description: "Convert blueprint_go_binary with src in different package",
+		Blueprint:   bp,
+		Filesystem: map[string]string{
+			"subdir/Android.bp": "",
+		},
+		ExpectedBazelTargets: []string{makeBazelTargetHostOrDevice("go_binary", "foo",
+			AttrNameToString{
+				"deps": `[]`,
+				"srcs": `["//subdir:main.go"]`,
 			},
 			android.HostSupported,
 		)},