Track allowed transitive deps in any updatable module.

Instead of tracking per module and per module variant, track allowed
list of dependecies for all modules combined. This avoids issues with
different products and different downstream branches having different
build graphs.

To compare allowed_deps.txt vs head, run:
:; m -j out/soong/apex/depsinfo/new-allowed-deps.txt.check

To update source allowed_deps.txt, run:
:; build/soong/scripts/update-apex-allowed-deps.sh

Bug: 149622332
Test: m
Change-Id: I56771ba3fea748de8e9c58c80758670572f7af53
Merged-In: Ic518fbd9ebfe1b46aaf9a58df731780a7e5a676b
diff --git a/android/apex.go b/android/apex.go
index 47f07ca..3437fed 100644
--- a/android/apex.go
+++ b/android/apex.go
@@ -450,15 +450,15 @@
 	var fullContent strings.Builder
 	var flatContent strings.Builder
 
-	fmt.Fprintf(&flatContent, "%s(minSdkVersion:%s):\\n", ctx.ModuleName(), minSdkVersion)
+	fmt.Fprintf(&fullContent, "%s(minSdkVersion:%s):\\n", ctx.ModuleName(), minSdkVersion)
 	for _, key := range FirstUniqueStrings(SortedStringKeys(depInfos)) {
 		info := depInfos[key]
 		toName := fmt.Sprintf("%s(minSdkVersion:%s)", info.To, info.MinSdkVersion)
 		if info.IsExternal {
 			toName = toName + " (external)"
 		}
-		fmt.Fprintf(&fullContent, "%s <- %s\\n", toName, strings.Join(SortedUniqueStrings(info.From), ", "))
-		fmt.Fprintf(&flatContent, "  %s\\n", toName)
+		fmt.Fprintf(&fullContent, "  %s <- %s\\n", toName, strings.Join(SortedUniqueStrings(info.From), ", "))
+		fmt.Fprintf(&flatContent, "%s\\n", toName)
 	}
 
 	d.fullListPath = PathForModuleOut(ctx, "depsinfo", "fulllist.txt").OutputPath
diff --git a/apex/OWNERS b/apex/OWNERS
index a382ae8..793f3ed 100644
--- a/apex/OWNERS
+++ b/apex/OWNERS
@@ -1 +1,4 @@
-per-file * = jiyong@google.com
\ No newline at end of file
+per-file * = jiyong@google.com
+
+per-file allowed_deps.txt = set noparent
+per-file allowed_deps.txt = dariofreni@google.com,hansson@google.com,harpin@google.com,jiyong@google.com,narayan@google.com,omakoto@google.com,jham@google.com
diff --git a/apex/allowed_deps.txt b/apex/allowed_deps.txt
new file mode 100644
index 0000000..87a4bc6
--- /dev/null
+++ b/apex/allowed_deps.txt
@@ -0,0 +1,244 @@
+# A list of allowed dependencies for all updatable modules.
+#
+# The list tracks all direct and transitive dependencies that end up within any
+# of the updatable binaries; specifically excluding external dependencies
+# required to compile those binaries. This prevents potential regressions in
+# case a new dependency is not aware of the different functional and
+# non-functional requirements being part of an updatable module, for example
+# setting correct min_sdk_version.
+#
+# To update the list, run:
+# repo-root$ build/soong/scripts/update-apex-allowed-deps.sh
+#
+# See go/apex-allowed-deps-error for more details.
+# TODO(b/157465465): introduce automated quality signals and remove this list.
+
+adbd(minSdkVersion:(no version))
+android.hardware.neuralnetworks@1.0(minSdkVersion:30)
+android.hardware.neuralnetworks@1.1(minSdkVersion:30)
+android.hardware.neuralnetworks@1.2(minSdkVersion:30)
+android.hardware.neuralnetworks@1.3(minSdkVersion:30)
+android.hardware.tetheroffload.config-V1.0-java(minSdkVersion:current)
+android.hardware.tetheroffload.control-V1.0-java(minSdkVersion:current)
+android.hidl.allocator@1.0(minSdkVersion:29)
+android.hidl.base-V1.0-java(minSdkVersion:current)
+android.hidl.memory.token@1.0(minSdkVersion:29)
+android.hidl.memory@1.0(minSdkVersion:29)
+android.hidl.safe_union@1.0(minSdkVersion:29)
+android.net.ipsec.ike(minSdkVersion:current)
+android.net.ipsec.ike.xml(minSdkVersion:(no version))
+androidx.activity_activity(minSdkVersion:14)
+androidx.annotation_annotation(minSdkVersion:current)
+androidx.arch.core_core-common(minSdkVersion:current)
+androidx.arch.core_core-runtime(minSdkVersion:14)
+androidx.asynclayoutinflater_asynclayoutinflater(minSdkVersion:14)
+androidx.collection_collection(minSdkVersion:current)
+androidx.coordinatorlayout_coordinatorlayout(minSdkVersion:14)
+androidx.core_core(minSdkVersion:14)
+androidx.cursoradapter_cursoradapter(minSdkVersion:14)
+androidx.customview_customview(minSdkVersion:14)
+androidx.documentfile_documentfile(minSdkVersion:14)
+androidx.drawerlayout_drawerlayout(minSdkVersion:14)
+androidx.fragment_fragment(minSdkVersion:14)
+androidx.interpolator_interpolator(minSdkVersion:14)
+androidx.legacy_legacy-support-core-ui(minSdkVersion:14)
+androidx.legacy_legacy-support-core-utils(minSdkVersion:14)
+androidx.legacy_legacy-support-v4(minSdkVersion:14)
+androidx.lifecycle_lifecycle-common(minSdkVersion:current)
+androidx.lifecycle_lifecycle-livedata-core(minSdkVersion:14)
+androidx.lifecycle_lifecycle-runtime(minSdkVersion:14)
+androidx.lifecycle_lifecycle-viewmodel(minSdkVersion:14)
+androidx.lifecycle_lifecycle-viewmodel-savedstate(minSdkVersion:14)
+androidx.loader_loader(minSdkVersion:14)
+androidx.localbroadcastmanager_localbroadcastmanager(minSdkVersion:14)
+androidx.media_media(minSdkVersion:14)
+androidx.print_print(minSdkVersion:14)
+androidx.savedstate_savedstate(minSdkVersion:14)
+androidx.slidingpanelayout_slidingpanelayout(minSdkVersion:14)
+androidx.swiperefreshlayout_swiperefreshlayout(minSdkVersion:14)
+androidx.versionedparcelable_versionedparcelable(minSdkVersion:14)
+androidx.viewpager_viewpager(minSdkVersion:14)
+art.module.public.api.stubs(minSdkVersion:(no version))
+bcm_object(minSdkVersion:29)
+boringssl_self_test(minSdkVersion:29)
+bouncycastle_ike_digests(minSdkVersion:current)
+captiveportal-lib(minSdkVersion:29)
+conscrypt(minSdkVersion:29)
+conscrypt.module.platform.api.stubs(minSdkVersion:(no version))
+conscrypt.module.public.api.stubs(minSdkVersion:(no version))
+core-lambda-stubs(minSdkVersion:(no version))
+core.current.stubs(minSdkVersion:(no version))
+crtbegin_dynamic(minSdkVersion:apex_inherit)
+crtbegin_dynamic1(minSdkVersion:apex_inherit)
+crtbegin_so(minSdkVersion:apex_inherit)
+crtbegin_so1(minSdkVersion:apex_inherit)
+crtbrand(minSdkVersion:apex_inherit)
+crtend_android(minSdkVersion:apex_inherit)
+crtend_so(minSdkVersion:apex_inherit)
+datastallprotosnano(minSdkVersion:29)
+derive_sdk(minSdkVersion:current)
+derive_sdk_prefer32(minSdkVersion:current)
+dnsresolver_aidl_interface-unstable-ndk_platform(minSdkVersion:29)
+flatbuffer_headers(minSdkVersion:(no version))
+fmtlib(minSdkVersion:29)
+framework-sdkextensions(minSdkVersion:current)
+framework-tethering(minSdkVersion:current)
+gemmlowp_headers(minSdkVersion:(no version))
+gwp_asan_headers(minSdkVersion:(no version))
+i18n.module.public.api.stubs(minSdkVersion:(no version))
+ike-internals(minSdkVersion:current)
+InProcessTethering(minSdkVersion:current)
+ipmemorystore-aidl-interfaces-java(minSdkVersion:29)
+ipmemorystore-aidl-interfaces-unstable-java(minSdkVersion:29)
+jni_headers(minSdkVersion:29)
+legacy.art.module.platform.api.stubs(minSdkVersion:(no version))
+legacy.core.platform.api.stubs(minSdkVersion:(no version))
+legacy.i18n.module.platform.api.stubs(minSdkVersion:(no version))
+libadb_crypto(minSdkVersion:(no version))
+libadb_pairing_auth(minSdkVersion:(no version))
+libadb_pairing_connection(minSdkVersion:(no version))
+libadb_pairing_server(minSdkVersion:(no version))
+libadb_protos(minSdkVersion:(no version))
+libadb_tls_connection(minSdkVersion:(no version))
+libadbconnection_client(minSdkVersion:(no version))
+libadbconnection_server(minSdkVersion:(no version))
+libadbd(minSdkVersion:(no version))
+libadbd_core(minSdkVersion:(no version))
+libadbd_services(minSdkVersion:(no version))
+libapp_processes_protos_lite(minSdkVersion:(no version))
+libarect(minSdkVersion:29)
+libasyncio(minSdkVersion:(no version))
+libatomic(minSdkVersion:(no version))
+libbacktrace_headers(minSdkVersion:apex_inherit)
+libbase(minSdkVersion:29)
+libbase_headers(minSdkVersion:29)
+libbrotli(minSdkVersion:(no version))
+libbuildversion(minSdkVersion:(no version))
+libc(minSdkVersion:(no version))
+libc++(minSdkVersion:apex_inherit)
+libc++_static(minSdkVersion:apex_inherit)
+libc++abi(minSdkVersion:apex_inherit)
+libc++demangle(minSdkVersion:apex_inherit)
+libc_headers(minSdkVersion:apex_inherit)
+libc_headers_arch(minSdkVersion:apex_inherit)
+libcap(minSdkVersion:29)
+libcrypto(minSdkVersion:29)
+libcrypto_static(minSdkVersion:(no version))
+libcrypto_utils(minSdkVersion:(no version))
+libcutils(minSdkVersion:29)
+libcutils_headers(minSdkVersion:29)
+libcutils_sockets(minSdkVersion:29)
+libdiagnose_usb(minSdkVersion:(no version))
+libdl(minSdkVersion:(no version))
+libeigen(minSdkVersion:(no version))
+libfmq(minSdkVersion:29)
+libgcc_stripped(minSdkVersion:(no version))
+libgtest_prod(minSdkVersion:apex_inherit)
+libhidlbase(minSdkVersion:29)
+libhidlmemory(minSdkVersion:29)
+libhwbinder-impl-internal(minSdkVersion:29)
+libjavacrypto(minSdkVersion:29)
+libjsoncpp(minSdkVersion:29)
+liblog(minSdkVersion:(no version))
+liblog_headers(minSdkVersion:29)
+liblz4(minSdkVersion:(no version))
+libm(minSdkVersion:(no version))
+libmath(minSdkVersion:29)
+libmdnssd(minSdkVersion:(no version))
+libminijail(minSdkVersion:29)
+libminijail_gen_constants(minSdkVersion:(no version))
+libminijail_gen_constants_obj(minSdkVersion:29)
+libminijail_gen_syscall(minSdkVersion:(no version))
+libminijail_gen_syscall_obj(minSdkVersion:29)
+libminijail_generated(minSdkVersion:29)
+libnativehelper_compat_libc++(minSdkVersion:(no version))
+libnativehelper_header_only(minSdkVersion:29)
+libnetd_resolv(minSdkVersion:29)
+libnetdbinder_utils_headers(minSdkVersion:29)
+libnetdutils(minSdkVersion:29)
+libnetworkstackutilsjni(minSdkVersion:29)
+libneuralnetworks(minSdkVersion:(no version))
+libneuralnetworks_common(minSdkVersion:(no version))
+libneuralnetworks_headers(minSdkVersion:(no version))
+libprocessgroup(minSdkVersion:29)
+libprocessgroup_headers(minSdkVersion:29)
+libprocpartition(minSdkVersion:(no version))
+libprotobuf-cpp-lite(minSdkVersion:29)
+libprotobuf-java-lite(minSdkVersion:current)
+libprotobuf-java-nano(minSdkVersion:9)
+libqemu_pipe(minSdkVersion:(no version))
+libssl(minSdkVersion:29)
+libstatslog_resolv(minSdkVersion:29)
+libstatspush_compat(minSdkVersion:29)
+libstatssocket_headers(minSdkVersion:29)
+libsystem_headers(minSdkVersion:apex_inherit)
+libsysutils(minSdkVersion:apex_inherit)
+libtetherutilsjni(minSdkVersion:current)
+libtextclassifier_hash_headers(minSdkVersion:(no version))
+libtextclassifier_hash_static(minSdkVersion:(no version))
+libtflite_kernel_utils(minSdkVersion:(no version))
+libunwind_llvm(minSdkVersion:apex_inherit)
+libutils(minSdkVersion:apex_inherit)
+libutils_headers(minSdkVersion:apex_inherit)
+libzstd(minSdkVersion:(no version))
+metrics-constants-protos(minSdkVersion:29)
+ndk_crtbegin_so.19(minSdkVersion:(no version))
+ndk_crtbegin_so.21(minSdkVersion:(no version))
+ndk_crtbegin_so.27(minSdkVersion:(no version))
+ndk_crtend_so.19(minSdkVersion:(no version))
+ndk_crtend_so.21(minSdkVersion:(no version))
+ndk_crtend_so.27(minSdkVersion:(no version))
+ndk_libc++_static(minSdkVersion:(no version))
+ndk_libc++abi(minSdkVersion:(no version))
+net-utils-framework-common(minSdkVersion:current)
+netd_aidl_interface-unstable-java(minSdkVersion:29)
+netd_event_listener_interface-ndk_platform(minSdkVersion:29)
+netlink-client(minSdkVersion:29)
+networkstack-aidl-interfaces-unstable-java(minSdkVersion:29)
+networkstack-client(minSdkVersion:29)
+NetworkStackApiStableDependencies(minSdkVersion:29)
+NetworkStackApiStableLib(minSdkVersion:29)
+networkstackprotos(minSdkVersion:29)
+philox_random(minSdkVersion:(no version))
+philox_random_headers(minSdkVersion:(no version))
+prebuilt_androidx.activity_activity-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.annotation_annotation-nodeps(minSdkVersion:current)
+prebuilt_androidx.arch.core_core-common-nodeps(minSdkVersion:current)
+prebuilt_androidx.arch.core_core-runtime-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.asynclayoutinflater_asynclayoutinflater-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.collection_collection-nodeps(minSdkVersion:current)
+prebuilt_androidx.coordinatorlayout_coordinatorlayout-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.core_core-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.cursoradapter_cursoradapter-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.customview_customview-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.documentfile_documentfile-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.drawerlayout_drawerlayout-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.fragment_fragment-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.interpolator_interpolator-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.legacy_legacy-support-core-ui-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.legacy_legacy-support-core-utils-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.lifecycle_lifecycle-common-nodeps(minSdkVersion:current)
+prebuilt_androidx.lifecycle_lifecycle-livedata-core-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.lifecycle_lifecycle-runtime-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.lifecycle_lifecycle-viewmodel-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.lifecycle_lifecycle-viewmodel-savedstate-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.loader_loader-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.localbroadcastmanager_localbroadcastmanager-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.media_media-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.print_print-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.savedstate_savedstate-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.slidingpanelayout_slidingpanelayout-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.swiperefreshlayout_swiperefreshlayout-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.versionedparcelable_versionedparcelable-nodeps(minSdkVersion:(no version))
+prebuilt_androidx.viewpager_viewpager-nodeps(minSdkVersion:(no version))
+prebuilt_libclang_rt.builtins-aarch64-android(minSdkVersion:(no version))
+prebuilt_libclang_rt.builtins-arm-android(minSdkVersion:(no version))
+prebuilt_libclang_rt.builtins-i686-android(minSdkVersion:(no version))
+prebuilt_libclang_rt.builtins-x86_64-android(minSdkVersion:(no version))
+prebuilt_test_framework-sdkextensions(minSdkVersion:(no version))
+server_configurable_flags(minSdkVersion:29)
+stats_proto(minSdkVersion:29)
+statsprotos(minSdkVersion:29)
+tensorflow_headers(minSdkVersion:(no version))
+Tethering(minSdkVersion:current)
+TetheringApiCurrentLib(minSdkVersion:current)
diff --git a/apex/apex_singleton.go b/apex/apex_singleton.go
index 83a56a2..afb739c 100644
--- a/apex/apex_singleton.go
+++ b/apex/apex_singleton.go
@@ -17,9 +17,9 @@
 package apex
 
 import (
-	"github.com/google/blueprint"
-
 	"android/soong/android"
+
+	"github.com/google/blueprint"
 )
 
 func init() {
@@ -27,39 +27,79 @@
 }
 
 type apexDepsInfoSingleton struct {
-	// Output file with all flatlists from updatable modules' deps-info combined
-	updatableFlatListsPath android.OutputPath
+	allowedApexDepsInfoCheckResult android.OutputPath
 }
 
 func apexDepsInfoSingletonFactory() android.Singleton {
 	return &apexDepsInfoSingleton{}
 }
 
-var combineFilesRule = pctx.AndroidStaticRule("combineFilesRule",
-	blueprint.RuleParams{
-		Command:        "cat $out.rsp | xargs cat > $out",
+var (
+	// Generate new apex allowed_deps.txt by merging all internal dependencies.
+	generateApexDepsInfoFilesRule = pctx.AndroidStaticRule("generateApexDepsInfoFilesRule", blueprint.RuleParams{
+		Command: "cat $out.rsp | xargs cat" +
+			// Only track non-external dependencies, i.e. those that end up in the binary
+			" | grep -v '(external)'" +
+			// Ignore comments in any of the files
+			" | grep -v '^#'" +
+			" | sort -u -f >$out",
 		Rspfile:        "$out.rsp",
 		RspfileContent: "$in",
-	},
+	})
+
+	// Diff two given lists while ignoring comments in the allowed deps file.
+	diffAllowedApexDepsInfoRule = pctx.AndroidStaticRule("diffAllowedApexDepsInfoRule", blueprint.RuleParams{
+		Description: "Diff ${allowed_deps} and ${new_allowed_deps}",
+		Command: `
+			if grep -v '^#' ${allowed_deps} | diff -B - ${new_allowed_deps}; then
+			   touch ${out};
+			else
+				echo -e "\n******************************";
+				echo "ERROR: go/apex-allowed-deps-error";
+				echo "******************************";
+				echo "Detected changes to allowed dependencies in updatable modules.";
+				echo "To fix and update build/soong/apex/allowed_deps.txt, please run:";
+				echo "$$ (croot && build/soong/scripts/update-apex-allowed-deps.sh)";
+				echo "Members of mainline-modularization@google.com will review the changes.";
+				echo -e "******************************\n";
+				exit 1;
+			fi;
+		`,
+	}, "allowed_deps", "new_allowed_deps")
 )
 
 func (s *apexDepsInfoSingleton) GenerateBuildActions(ctx android.SingletonContext) {
 	updatableFlatLists := android.Paths{}
 	ctx.VisitAllModules(func(module android.Module) {
 		if binaryInfo, ok := module.(android.ApexBundleDepsInfoIntf); ok {
-			if path := binaryInfo.FlatListPath(); path != nil {
-				if binaryInfo.Updatable() {
-					updatableFlatLists = append(updatableFlatLists, path)
-				}
+			if path := binaryInfo.FlatListPath(); path != nil && binaryInfo.Updatable() {
+				updatableFlatLists = append(updatableFlatLists, path)
 			}
 		}
 	})
 
-	s.updatableFlatListsPath = android.PathForOutput(ctx, "apex", "depsinfo", "updatable-flatlists.txt")
+	allowedDeps := android.ExistentPathForSource(ctx, "build/soong/apex/allowed_deps.txt").Path()
+
+	newAllowedDeps := android.PathForOutput(ctx, "apex", "depsinfo", "new-allowed-deps.txt")
 	ctx.Build(pctx, android.BuildParams{
-		Rule:        combineFilesRule,
-		Description: "Generate " + s.updatableFlatListsPath.String(),
-		Inputs:      updatableFlatLists,
-		Output:      s.updatableFlatListsPath,
+		Rule:   generateApexDepsInfoFilesRule,
+		Inputs: append(updatableFlatLists, allowedDeps),
+		Output: newAllowedDeps,
 	})
+
+	s.allowedApexDepsInfoCheckResult = android.PathForOutput(ctx, newAllowedDeps.Rel()+".check")
+	ctx.Build(pctx, android.BuildParams{
+		Rule:   diffAllowedApexDepsInfoRule,
+		Input:  newAllowedDeps,
+		Output: s.allowedApexDepsInfoCheckResult,
+		Args: map[string]string{
+			"allowed_deps":     allowedDeps.String(),
+			"new_allowed_deps": newAllowedDeps.String(),
+		},
+	})
+}
+
+func (s *apexDepsInfoSingleton) MakeVars(ctx android.MakeVarsContext) {
+	// Export check result to Make. The path is added to droidcore.
+	ctx.Strict("APEX_ALLOWED_DEPS_CHECK", s.allowedApexDepsInfoCheckResult.String())
 }
diff --git a/apex/apex_test.go b/apex/apex_test.go
index f064338..500bb20 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -573,18 +573,18 @@
 	ensureListContains(t, noticeInputs, "custom_notice_for_static_lib")
 
 	fullDepsInfo := strings.Split(ctx.ModuleForTests("myapex", "android_common_myapex_image").Output("depsinfo/fulllist.txt").Args["content"], "\\n")
-	ensureListContains(t, fullDepsInfo, "myjar(minSdkVersion:(no version)) <- myapex")
-	ensureListContains(t, fullDepsInfo, "mylib(minSdkVersion:(no version)) <- myapex")
-	ensureListContains(t, fullDepsInfo, "mylib2(minSdkVersion:(no version)) <- mylib")
-	ensureListContains(t, fullDepsInfo, "myotherjar(minSdkVersion:(no version)) <- myjar")
-	ensureListContains(t, fullDepsInfo, "mysharedjar(minSdkVersion:(no version)) (external) <- myjar")
+	ensureListContains(t, fullDepsInfo, "  myjar(minSdkVersion:(no version)) <- myapex")
+	ensureListContains(t, fullDepsInfo, "  mylib(minSdkVersion:(no version)) <- myapex")
+	ensureListContains(t, fullDepsInfo, "  mylib2(minSdkVersion:(no version)) <- mylib")
+	ensureListContains(t, fullDepsInfo, "  myotherjar(minSdkVersion:(no version)) <- myjar")
+	ensureListContains(t, fullDepsInfo, "  mysharedjar(minSdkVersion:(no version)) (external) <- myjar")
 
 	flatDepsInfo := strings.Split(ctx.ModuleForTests("myapex", "android_common_myapex_image").Output("depsinfo/flatlist.txt").Args["content"], "\\n")
-	ensureListContains(t, flatDepsInfo, "  myjar(minSdkVersion:(no version))")
-	ensureListContains(t, flatDepsInfo, "  mylib(minSdkVersion:(no version))")
-	ensureListContains(t, flatDepsInfo, "  mylib2(minSdkVersion:(no version))")
-	ensureListContains(t, flatDepsInfo, "  myotherjar(minSdkVersion:(no version))")
-	ensureListContains(t, flatDepsInfo, "  mysharedjar(minSdkVersion:(no version)) (external)")
+	ensureListContains(t, flatDepsInfo, "myjar(minSdkVersion:(no version))")
+	ensureListContains(t, flatDepsInfo, "mylib(minSdkVersion:(no version))")
+	ensureListContains(t, flatDepsInfo, "mylib2(minSdkVersion:(no version))")
+	ensureListContains(t, flatDepsInfo, "myotherjar(minSdkVersion:(no version))")
+	ensureListContains(t, flatDepsInfo, "mysharedjar(minSdkVersion:(no version)) (external)")
 }
 
 func TestDefaults(t *testing.T) {
@@ -894,14 +894,14 @@
 	ensureNotContains(t, libFooStubsLdFlags, "libbar.so")
 
 	fullDepsInfo := strings.Split(ctx.ModuleForTests("myapex2", "android_common_myapex2_image").Output("depsinfo/fulllist.txt").Args["content"], "\\n")
-	ensureListContains(t, fullDepsInfo, "mylib(minSdkVersion:(no version)) <- myapex2")
-	ensureListContains(t, fullDepsInfo, "libbaz(minSdkVersion:(no version)) <- mylib")
-	ensureListContains(t, fullDepsInfo, "libfoo(minSdkVersion:(no version)) (external) <- mylib")
+	ensureListContains(t, fullDepsInfo, "  mylib(minSdkVersion:(no version)) <- myapex2")
+	ensureListContains(t, fullDepsInfo, "  libbaz(minSdkVersion:(no version)) <- mylib")
+	ensureListContains(t, fullDepsInfo, "  libfoo(minSdkVersion:(no version)) (external) <- mylib")
 
 	flatDepsInfo := strings.Split(ctx.ModuleForTests("myapex2", "android_common_myapex2_image").Output("depsinfo/flatlist.txt").Args["content"], "\\n")
-	ensureListContains(t, flatDepsInfo, "  mylib(minSdkVersion:(no version))")
-	ensureListContains(t, flatDepsInfo, "  libbaz(minSdkVersion:(no version))")
-	ensureListContains(t, flatDepsInfo, "  libfoo(minSdkVersion:(no version)) (external)")
+	ensureListContains(t, flatDepsInfo, "mylib(minSdkVersion:(no version))")
+	ensureListContains(t, flatDepsInfo, "libbaz(minSdkVersion:(no version))")
+	ensureListContains(t, flatDepsInfo, "libfoo(minSdkVersion:(no version)) (external)")
 }
 
 func TestApexWithRuntimeLibsDependency(t *testing.T) {
diff --git a/scripts/update-apex-allowed-deps.sh b/scripts/update-apex-allowed-deps.sh
new file mode 100755
index 0000000..872d746
--- /dev/null
+++ b/scripts/update-apex-allowed-deps.sh
@@ -0,0 +1,39 @@
+#!/bin/bash -e
+#
+# The script to run locally to re-generate global allowed list of dependencies
+# for updatable modules.
+
+if [ ! -e "build/envsetup.sh" ]; then
+  echo "ERROR: $0 must be run from the top of the tree"
+  exit 1
+fi
+
+source build/envsetup.sh > /dev/null || exit 1
+
+readonly OUT_DIR=$(get_build_var OUT_DIR)
+
+readonly ALLOWED_DEPS_FILE="build/soong/apex/allowed_deps.txt"
+readonly NEW_ALLOWED_DEPS_FILE="${OUT_DIR}/soong/apex/depsinfo/new-allowed-deps.txt"
+
+# If the script is run after droidcore failure, ${NEW_ALLOWED_DEPS_FILE}
+# should already be built. If running the script manually, make sure it exists.
+m "${NEW_ALLOWED_DEPS_FILE}" -j
+
+cat > "${ALLOWED_DEPS_FILE}" << EndOfFileComment
+# A list of allowed dependencies for all updatable modules.
+#
+# The list tracks all direct and transitive dependencies that end up within any
+# of the updatable binaries; specifically excluding external dependencies
+# required to compile those binaries. This prevents potential regressions in
+# case a new dependency is not aware of the different functional and
+# non-functional requirements being part of an updatable module, for example
+# setting correct min_sdk_version.
+#
+# To update the list, run:
+# repo-root$ build/soong/scripts/update-apex-allowed-deps.sh
+#
+# See go/apex-allowed-deps-error for more details.
+# TODO(b/157465465): introduce automated quality signals and remove this list.
+EndOfFileComment
+
+cat "${NEW_ALLOWED_DEPS_FILE}" >> "${ALLOWED_DEPS_FILE}"