Merge "Allow //visibility:public to override other visibility rules."
diff --git a/README.md b/README.md
index 2658e0d..8fdce4b 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,8 @@
 Maps may values of any type, including nested maps.  Lists and maps may have
 trailing commas after the last value.
 
+Strings can contain double quotes using `\"`, for example `"cat \"a b\""`.
+
 ### Operators
 
 Strings, lists of strings, and maps can be appended using the `+` operator.
diff --git a/androidmk/cmd/androidmk/android.go b/androidmk/cmd/androidmk/android.go
index a23879f..cb71725 100644
--- a/androidmk/cmd/androidmk/android.go
+++ b/androidmk/cmd/androidmk/android.go
@@ -123,6 +123,7 @@
 			"LOCAL_SYSTEM_SHARED_LIBRARIES":       "system_shared_libs",
 			"LOCAL_ASFLAGS":                       "asflags",
 			"LOCAL_CLANG_ASFLAGS":                 "clang_asflags",
+			"LOCAL_COMPATIBILITY_SUPPORT_FILES":   "data",
 			"LOCAL_CONLYFLAGS":                    "conlyflags",
 			"LOCAL_CPPFLAGS":                      "cppflags",
 			"LOCAL_REQUIRED_MODULES":              "required",
diff --git a/androidmk/cmd/androidmk/androidmk_test.go b/androidmk/cmd/androidmk/androidmk_test.go
index b3b1ce0..2eab0cc 100644
--- a/androidmk/cmd/androidmk/androidmk_test.go
+++ b/androidmk/cmd/androidmk/androidmk_test.go
@@ -809,6 +809,7 @@
 LOCAL_PACKAGE_NAME := FooTest
 LOCAL_COMPATIBILITY_SUITE := cts
 LOCAL_CTS_TEST_PACKAGE := foo.bar
+LOCAL_COMPATIBILITY_SUPPORT_FILES := file1
 include $(BUILD_CTS_PACKAGE)
 `,
 		expected: `
@@ -817,6 +818,7 @@
     defaults: ["cts_defaults"],
     test_suites: ["cts"],
 
+    data: ["file1"],
 }
 `,
 	},
diff --git a/cc/androidmk.go b/cc/androidmk.go
index ae34e3d..32ccf4c 100644
--- a/cc/androidmk.go
+++ b/cc/androidmk.go
@@ -90,6 +90,9 @@
 				fmt.Fprintln(w, "LOCAL_SOONG_LINK_TYPE :=", c.makeLinkType)
 				if c.useVndk() {
 					fmt.Fprintln(w, "LOCAL_USE_VNDK := true")
+					if c.isVndk() && !c.static() {
+						fmt.Fprintln(w, "LOCAL_SOONG_VNDK_VERSION := "+c.vndkVersion())
+					}
 				}
 			},
 		},
diff --git a/cc/cc.go b/cc/cc.go
index 2e551e1..4600a15 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -534,6 +534,13 @@
 	return false
 }
 
+func (c *Module) vndkVersion() string {
+	if vndkdep := c.vndkdep; vndkdep != nil {
+		return vndkdep.Properties.Vndk.Version
+	}
+	return ""
+}
+
 func (c *Module) isPgoCompile() bool {
 	if pgo := c.pgo; pgo != nil {
 		return pgo.Properties.PgoCompile
diff --git a/cc/config/clang.go b/cc/config/clang.go
index 94a8257..47b60e7 100644
--- a/cc/config/clang.go
+++ b/cc/config/clang.go
@@ -108,6 +108,9 @@
 		// Help catch common 32/64-bit errors.
 		"-Werror=int-conversion",
 
+		// Enable the new pass manager.
+		"-fexperimental-new-pass-manager",
+
 		// Disable overly aggressive warning for macros defined with a leading underscore
 		// This happens in AndroidConfig.h, which is included nearly everywhere.
 		// TODO: can we remove this now?
diff --git a/cc/vndk.go b/cc/vndk.go
index a1d67af..60a3d78 100644
--- a/cc/vndk.go
+++ b/cc/vndk.go
@@ -49,6 +49,10 @@
 
 		// Extending another module
 		Extends *string
+
+		// for vndk_prebuilt_shared, this is set by "version" property.
+		// Otherwise, this is set as PLATFORM_VNDK_VERSION.
+		Version string `blueprint:"mutated"`
 	}
 }
 
@@ -325,6 +329,14 @@
 		return
 	}
 
+	if m.isVndk() {
+		if lib, ok := m.linker.(*vndkPrebuiltLibraryDecorator); ok {
+			m.vndkdep.Properties.Vndk.Version = lib.version()
+		} else {
+			m.vndkdep.Properties.Vndk.Version = mctx.DeviceConfig().PlatformVndkVersion()
+		}
+	}
+
 	if _, ok := m.linker.(*llndkStubDecorator); ok {
 		processLlndkLibrary(mctx, m)
 		return
diff --git a/java/aar.go b/java/aar.go
index 7332e76..65a7c2a 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -84,6 +84,7 @@
 	useEmbeddedNativeLibs   bool
 	useEmbeddedDex          bool
 	usesNonSdkApis          bool
+	sdkLibraries            []string
 
 	splitNames []string
 	splits     []split
@@ -194,13 +195,15 @@
 }
 
 func (a *aapt) buildActions(ctx android.ModuleContext, sdkContext sdkContext, extraLinkFlags ...string) {
-	transitiveStaticLibs, transitiveStaticLibManifests, staticRRODirs, libDeps, libFlags := aaptLibs(ctx, sdkContext)
+
+	transitiveStaticLibs, transitiveStaticLibManifests, staticRRODirs, libDeps, libFlags, sdkLibraries :=
+		aaptLibs(ctx, sdkContext)
 
 	// App manifest file
 	manifestFile := proptools.StringDefault(a.aaptProperties.Manifest, "AndroidManifest.xml")
 	manifestSrcPath := android.PathForModuleSrc(ctx, manifestFile)
 
-	manifestPath := manifestFixer(ctx, manifestSrcPath, sdkContext,
+	manifestPath := manifestFixer(ctx, manifestSrcPath, sdkContext, sdkLibraries,
 		a.isLibrary, a.useEmbeddedNativeLibs, a.usesNonSdkApis, a.useEmbeddedDex)
 
 	a.transitiveManifestPaths = append(android.Paths{manifestPath}, transitiveStaticLibManifests...)
@@ -303,7 +306,7 @@
 
 // aaptLibs collects libraries from dependencies and sdk_version and converts them into paths
 func aaptLibs(ctx android.ModuleContext, sdkContext sdkContext) (transitiveStaticLibs, transitiveStaticLibManifests android.Paths,
-	staticRRODirs []rroDir, deps android.Paths, flags []string) {
+	staticRRODirs []rroDir, deps android.Paths, flags []string, sdkLibraries []string) {
 
 	var sharedLibs android.Paths
 
@@ -322,7 +325,16 @@
 		switch ctx.OtherModuleDependencyTag(module) {
 		case instrumentationForTag:
 			// Nothing, instrumentationForTag is treated as libTag for javac but not for aapt2.
-		case libTag, frameworkResTag:
+		case libTag:
+			if exportPackage != nil {
+				sharedLibs = append(sharedLibs, exportPackage)
+			}
+
+			if _, ok := module.(SdkLibraryDependency); ok {
+				sdkLibraries = append(sdkLibraries, ctx.OtherModuleName(module))
+			}
+
+		case frameworkResTag:
 			if exportPackage != nil {
 				sharedLibs = append(sharedLibs, exportPackage)
 			}
@@ -331,6 +343,7 @@
 				transitiveStaticLibs = append(transitiveStaticLibs, aarDep.ExportedStaticPackages()...)
 				transitiveStaticLibs = append(transitiveStaticLibs, exportPackage)
 				transitiveStaticLibManifests = append(transitiveStaticLibManifests, aarDep.ExportedManifests()...)
+				sdkLibraries = append(sdkLibraries, aarDep.ExportedSdkLibs()...)
 
 			outer:
 				for _, d := range aarDep.ExportedRRODirs() {
@@ -358,8 +371,9 @@
 
 	transitiveStaticLibs = android.FirstUniquePaths(transitiveStaticLibs)
 	transitiveStaticLibManifests = android.FirstUniquePaths(transitiveStaticLibManifests)
+	sdkLibraries = android.FirstUniqueStrings(sdkLibraries)
 
-	return transitiveStaticLibs, transitiveStaticLibManifests, staticRRODirs, deps, flags
+	return transitiveStaticLibs, transitiveStaticLibManifests, staticRRODirs, deps, flags, sdkLibraries
 }
 
 type AndroidLibrary struct {
@@ -393,6 +407,7 @@
 
 func (a *AndroidLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext) {
 	a.aapt.isLibrary = true
+	a.aapt.sdkLibraries = a.exportedSdkLibs
 	a.aapt.buildActions(ctx, sdkContext(a))
 
 	ctx.CheckbuildFile(a.proguardOptionsFile)
@@ -603,10 +618,12 @@
 	linkFlags = append(linkFlags, "--manifest "+a.manifest.String())
 	linkDeps = append(linkDeps, a.manifest)
 
-	transitiveStaticLibs, staticLibManifests, staticRRODirs, libDeps, libFlags := aaptLibs(ctx, sdkContext(a))
+	transitiveStaticLibs, staticLibManifests, staticRRODirs, libDeps, libFlags, sdkLibraries :=
+		aaptLibs(ctx, sdkContext(a))
 
 	_ = staticLibManifests
 	_ = staticRRODirs
+	_ = sdkLibraries
 
 	linkDeps = append(linkDeps, libDeps...)
 	linkFlags = append(linkFlags, libFlags...)
diff --git a/java/android_manifest.go b/java/android_manifest.go
index 5d3cfa5..b5921be 100644
--- a/java/android_manifest.go
+++ b/java/android_manifest.go
@@ -41,8 +41,18 @@
 	},
 	"args", "libs")
 
+// These two libs are added as optional dependencies (<uses-library> with
+// android:required set to false). This is because they haven't existed in pre-P
+// devices, but classes in them were in bootclasspath jars, etc. So making them
+// hard dependencies (android:required=true) would prevent apps from being
+// installed to such legacy devices.
+var optionalUsesLibs = []string{
+	"android.test.base",
+	"android.test.mock",
+}
+
 // Uses manifest_fixer.py to inject minSdkVersion, etc. into an AndroidManifest.xml
-func manifestFixer(ctx android.ModuleContext, manifest android.Path, sdkContext sdkContext,
+func manifestFixer(ctx android.ModuleContext, manifest android.Path, sdkContext sdkContext, sdkLibraries []string,
 	isLibrary, useEmbeddedNativeLibs, usesNonSdkApis, useEmbeddedDex bool) android.Path {
 
 	var args []string
@@ -69,6 +79,14 @@
 		args = append(args, "--use-embedded-dex")
 	}
 
+	for _, usesLib := range sdkLibraries {
+		if inList(usesLib, optionalUsesLibs) {
+			args = append(args, "--optional-uses-library", usesLib)
+		} else {
+			args = append(args, "--uses-library", usesLib)
+		}
+	}
+
 	var deps android.Paths
 	targetSdkVersion := sdkVersionOrDefault(ctx, sdkContext.targetSdkVersion())
 	if targetSdkVersion == ctx.Config().PlatformSdkCodename() &&
diff --git a/java/config/config.go b/java/config/config.go
index 46cd361..f9552d5 100644
--- a/java/config/config.go
+++ b/java/config/config.go
@@ -142,7 +142,8 @@
 
 	hostBinToolVariableWithPrebuilt("Aapt2Cmd", "prebuilts/sdk/tools", "aapt2")
 
-	pctx.SourcePathVariable("ManifestFixerCmd", "build/soong/scripts/manifest_fixer.py")
+	pctx.HostBinToolVariable("ManifestCheckCmd", "manifest_check")
+	pctx.HostBinToolVariable("ManifestFixerCmd", "manifest_fixer")
 
 	pctx.HostBinToolVariable("ManifestMergerCmd", "manifest-merger")
 
diff --git a/java/config/makevars.go b/java/config/makevars.go
index 6881caf..9c78511 100644
--- a/java/config/makevars.go
+++ b/java/config/makevars.go
@@ -73,6 +73,7 @@
 
 	ctx.Strict("EXTRACT_JAR_PACKAGES", "${ExtractJarPackagesCmd}")
 
+	ctx.Strict("MANIFEST_CHECK", "${ManifestCheckCmd}")
 	ctx.Strict("MANIFEST_FIXER", "${ManifestFixerCmd}")
 
 	ctx.Strict("ANDROID_MANIFEST_MERGER", "${ManifestMergerCmd}")
diff --git a/java/droiddoc.go b/java/droiddoc.go
index fd7e2a4..57da6b6 100644
--- a/java/droiddoc.go
+++ b/java/droiddoc.go
@@ -211,6 +211,7 @@
 	// Available variables for substitution:
 	//
 	//  $(location <label>): the path to the arg_files with name <label>
+	//  $$: a literal $
 	Args *string
 
 	// names of the output files used in args that will be generated
diff --git a/java/hiddenapi_singleton.go b/java/hiddenapi_singleton.go
index 9627dc6..b1ddab4 100644
--- a/java/hiddenapi_singleton.go
+++ b/java/hiddenapi_singleton.go
@@ -61,7 +61,7 @@
 	stubFlagsRule(ctx)
 
 	// These rules depend on files located in frameworks/base, skip them if running in a tree that doesn't have them.
-	if ctx.Config().FrameworksBaseDirExists(ctx) {
+	if ctx.Config().FrameworksBaseDirExists(ctx) && !ctx.Config().UnbundledBuild() {
 		h.flags = flagsRule(ctx)
 		h.metadata = metadataRule(ctx)
 	} else {
diff --git a/java/java.go b/java/java.go
index 4483083..8dbdfb6 100644
--- a/java/java.go
+++ b/java/java.go
@@ -1301,9 +1301,11 @@
 			return
 		}
 
-		// Hidden API CSV generation and dex encoding
-		dexOutputFile = j.hiddenAPI.hiddenAPI(ctx, dexOutputFile, j.implementationJarFile,
-			j.deviceProperties.UncompressDex)
+		if !ctx.Config().UnbundledBuild() {
+			// Hidden API CSV generation and dex encoding
+			dexOutputFile = j.hiddenAPI.hiddenAPI(ctx, dexOutputFile, j.implementationJarFile,
+				j.deviceProperties.UncompressDex)
+		}
 
 		// merge dex jar with resources if necessary
 		if j.resourceJar != nil {
diff --git a/java/system_modules.go b/java/system_modules.go
index 9ee0307..8005360 100644
--- a/java/system_modules.go
+++ b/java/system_modules.go
@@ -87,11 +87,13 @@
 	module := &SystemModules{}
 	module.AddProperties(&module.properties)
 	android.InitAndroidArchModule(module, android.HostAndDeviceSupported, android.MultilibCommon)
+	android.InitDefaultableModule(module)
 	return module
 }
 
 type SystemModules struct {
 	android.ModuleBase
+	android.DefaultableModuleBase
 
 	properties SystemModulesProperties
 
diff --git a/scripts/Android.bp b/scripts/Android.bp
new file mode 100644
index 0000000..31f5922
--- /dev/null
+++ b/scripts/Android.bp
@@ -0,0 +1,71 @@
+python_binary_host {
+    name: "manifest_fixer",
+    main: "manifest_fixer.py",
+    srcs: [
+        "manifest_fixer.py",
+        "manifest.py",
+    ],
+    version: {
+        py2: {
+            enabled: true,
+        },
+        py3: {
+            enabled: false,
+        },
+    },
+}
+
+python_test_host {
+    name: "manifest_fixer_test",
+    main: "manifest_fixer_test.py",
+    srcs: [
+        "manifest_fixer_test.py",
+        "manifest_fixer.py",
+        "manifest.py",
+    ],
+    version: {
+        py2: {
+            enabled: true,
+        },
+        py3: {
+            enabled: false,
+        },
+    },
+    test_suites: ["general-tests"],
+}
+
+python_binary_host {
+    name: "manifest_check",
+    main: "manifest_check.py",
+    srcs: [
+        "manifest_check.py",
+        "manifest.py",
+    ],
+    version: {
+        py2: {
+            enabled: true,
+        },
+        py3: {
+            enabled: false,
+        },
+    },
+}
+
+python_test_host {
+    name: "manifest_check_test",
+    main: "manifest_check_test.py",
+    srcs: [
+        "manifest_check_test.py",
+        "manifest_check.py",
+        "manifest.py",
+    ],
+    version: {
+        py2: {
+            enabled: true,
+        },
+        py3: {
+            enabled: false,
+        },
+    },
+    test_suites: ["general-tests"],
+}
diff --git a/scripts/TEST_MAPPING b/scripts/TEST_MAPPING
new file mode 100644
index 0000000..1b0a229
--- /dev/null
+++ b/scripts/TEST_MAPPING
@@ -0,0 +1,12 @@
+{
+  "presubmit" : [
+    {
+      "name": "manifest_check_test",
+      "host": true
+    },
+    {
+      "name": "manifest_fixer_test",
+      "host": true
+    }    
+  ]
+}
diff --git a/scripts/build_broken_logs.go b/scripts/build_broken_logs.go
index 4f3e0de..8021e55 100644
--- a/scripts/build_broken_logs.go
+++ b/scripts/build_broken_logs.go
@@ -65,18 +65,6 @@
 		warnings: []string{"overriding commands for target"},
 	},
 	{
-		name:     "BUILD_BROKEN_ANDROIDMK_EXPORTS",
-		behavior: DefaultDeprecated,
-		warnings: []string{"export_keyword"},
-	},
-	{
-		name:     "BUILD_BROKEN_ENG_DEBUG_TAGS",
-		behavior: DefaultDeprecated,
-		warnings: []string{
-			"Changes.md#LOCAL_MODULE_TAGS",
-		},
-	},
-	{
 		name:     "BUILD_BROKEN_USES_NETWORK",
 		behavior: DefaultDeprecated,
 	},
diff --git a/scripts/manifest.py b/scripts/manifest.py
new file mode 100755
index 0000000..4c75f8b
--- /dev/null
+++ b/scripts/manifest.py
@@ -0,0 +1,117 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""A tool for inserting values from the build system into a manifest."""
+
+from __future__ import print_function
+from xml.dom import minidom
+
+
+android_ns = 'http://schemas.android.com/apk/res/android'
+
+
+def get_children_with_tag(parent, tag_name):
+  children = []
+  for child in  parent.childNodes:
+    if child.nodeType == minidom.Node.ELEMENT_NODE and \
+       child.tagName == tag_name:
+      children.append(child)
+  return children
+
+
+def find_child_with_attribute(element, tag_name, namespace_uri,
+                              attr_name, value):
+  for child in get_children_with_tag(element, tag_name):
+    attr = child.getAttributeNodeNS(namespace_uri, attr_name)
+    if attr is not None and attr.value == value:
+      return child
+  return None
+
+
+def parse_manifest(doc):
+  """Get the manifest element."""
+
+  manifest = doc.documentElement
+  if manifest.tagName != 'manifest':
+    raise RuntimeError('expected manifest tag at root')
+  return manifest
+
+
+def ensure_manifest_android_ns(doc):
+  """Make sure the manifest tag defines the android namespace."""
+
+  manifest = parse_manifest(doc)
+
+  ns = manifest.getAttributeNodeNS(minidom.XMLNS_NAMESPACE, 'android')
+  if ns is None:
+    attr = doc.createAttributeNS(minidom.XMLNS_NAMESPACE, 'xmlns:android')
+    attr.value = android_ns
+    manifest.setAttributeNode(attr)
+  elif ns.value != android_ns:
+    raise RuntimeError('manifest tag has incorrect android namespace ' +
+                       ns.value)
+
+
+def as_int(s):
+  try:
+    i = int(s)
+  except ValueError:
+    return s, False
+  return i, True
+
+
+def compare_version_gt(a, b):
+  """Compare two SDK versions.
+
+  Compares a and b, treating codenames like 'Q' as higher
+  than numerical versions like '28'.
+
+  Returns True if a > b
+
+  Args:
+    a: value to compare
+    b: value to compare
+  Returns:
+    True if a is a higher version than b
+  """
+
+  a, a_is_int = as_int(a.upper())
+  b, b_is_int = as_int(b.upper())
+
+  if a_is_int == b_is_int:
+    # Both are codenames or both are versions, compare directly
+    return a > b
+  else:
+    # One is a codename, the other is not.  Return true if
+    # b is an integer version
+    return b_is_int
+
+
+def get_indent(element, default_level):
+  indent = ''
+  if element is not None and element.nodeType == minidom.Node.TEXT_NODE:
+    text = element.nodeValue
+    indent = text[:len(text)-len(text.lstrip())]
+  if not indent or indent == '\n':
+    # 1 indent = 4 space
+    indent = '\n' + (' ' * default_level * 4)
+  return indent
+
+
+def write_xml(f, doc):
+  f.write('<?xml version="1.0" encoding="utf-8"?>\n')
+  for node in doc.childNodes:
+    f.write(node.toxml(encoding='utf-8') + '\n')
diff --git a/scripts/manifest_check.py b/scripts/manifest_check.py
new file mode 100755
index 0000000..9122da1
--- /dev/null
+++ b/scripts/manifest_check.py
@@ -0,0 +1,215 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""A tool for checking that a manifest agrees with the build system."""
+
+from __future__ import print_function
+
+import argparse
+import sys
+from xml.dom import minidom
+
+
+from manifest import android_ns
+from manifest import get_children_with_tag
+from manifest import parse_manifest
+from manifest import write_xml
+
+
+class ManifestMismatchError(Exception):
+  pass
+
+
+def parse_args():
+  """Parse commandline arguments."""
+
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--uses-library', dest='uses_libraries',
+                      action='append',
+                      help='specify uses-library entries known to the build system')
+  parser.add_argument('--optional-uses-library',
+                      dest='optional_uses_libraries',
+                      action='append',
+                      help='specify uses-library entries known to the build system with required:false')
+  parser.add_argument('--enforce-uses-libraries',
+                      dest='enforce_uses_libraries',
+                      action='store_true',
+                      help='check the uses-library entries known to the build system against the manifest')
+  parser.add_argument('--extract-target-sdk-version',
+                      dest='extract_target_sdk_version',
+                      action='store_true',
+                      help='print the targetSdkVersion from the manifest')
+  parser.add_argument('--output', '-o', dest='output', help='output AndroidManifest.xml file')
+  parser.add_argument('input', help='input AndroidManifest.xml file')
+  return parser.parse_args()
+
+
+def enforce_uses_libraries(doc, uses_libraries, optional_uses_libraries):
+  """Verify that the <uses-library> tags in the manifest match those provided by the build system.
+
+  Args:
+    doc: The XML document.
+    uses_libraries: The names of <uses-library> tags known to the build system
+    optional_uses_libraries: The names of <uses-library> tags with required:fals
+      known to the build system
+  Raises:
+    RuntimeError: Invalid manifest
+    ManifestMismatchError: Manifest does not match
+  """
+
+  manifest = parse_manifest(doc)
+  elems = get_children_with_tag(manifest, 'application')
+  application = elems[0] if len(elems) == 1 else None
+  if len(elems) > 1:
+    raise RuntimeError('found multiple <application> tags')
+  elif not elems:
+    if uses_libraries or optional_uses_libraries:
+      raise ManifestMismatchError('no <application> tag found')
+    return
+
+  verify_uses_library(application, uses_libraries, optional_uses_libraries)
+
+
+def verify_uses_library(application, uses_libraries, optional_uses_libraries):
+  """Verify that the uses-library values known to the build system match the manifest.
+
+  Args:
+    application: the <application> tag in the manifest.
+    uses_libraries: the names of expected <uses-library> tags.
+    optional_uses_libraries: the names of expected <uses-library> tags with required="false".
+  Raises:
+    ManifestMismatchError: Manifest does not match
+  """
+
+  if uses_libraries is None:
+    uses_libraries = []
+
+  if optional_uses_libraries is None:
+    optional_uses_libraries = []
+
+  manifest_uses_libraries, manifest_optional_uses_libraries = parse_uses_library(application)
+
+  err = []
+  if manifest_uses_libraries != uses_libraries:
+    err.append('Expected required <uses-library> tags "%s", got "%s"' %
+               (', '.join(uses_libraries), ', '.join(manifest_uses_libraries)))
+
+  if manifest_optional_uses_libraries != optional_uses_libraries:
+    err.append('Expected optional <uses-library> tags "%s", got "%s"' %
+               (', '.join(optional_uses_libraries), ', '.join(manifest_optional_uses_libraries)))
+
+  if err:
+    raise ManifestMismatchError('\n'.join(err))
+
+
+def parse_uses_library(application):
+  """Extract uses-library tags from the manifest.
+
+  Args:
+    application: the <application> tag in the manifest.
+  """
+
+  libs = get_children_with_tag(application, 'uses-library')
+
+  uses_libraries = [uses_library_name(x) for x in libs if uses_library_required(x)]
+  optional_uses_libraries = [uses_library_name(x) for x in libs if not uses_library_required(x)]
+
+  return first_unique_elements(uses_libraries), first_unique_elements(optional_uses_libraries)
+
+
+def first_unique_elements(l):
+  result = []
+  [result.append(x) for x in l if x not in result]
+  return result
+
+
+def uses_library_name(lib):
+  """Extract the name attribute of a uses-library tag.
+
+  Args:
+    lib: a <uses-library> tag.
+  """
+  name = lib.getAttributeNodeNS(android_ns, 'name')
+  return name.value if name is not None else ""
+
+
+def uses_library_required(lib):
+  """Extract the required attribute of a uses-library tag.
+
+  Args:
+    lib: a <uses-library> tag.
+  """
+  required = lib.getAttributeNodeNS(android_ns, 'required')
+  return (required.value == 'true') if required is not None else True
+
+
+def extract_target_sdk_version(doc):
+  """Returns the targetSdkVersion from the manifest.
+
+  Args:
+    doc: The XML document.
+  Raises:
+    RuntimeError: invalid manifest
+  """
+
+  manifest = parse_manifest(doc)
+
+  # Get or insert the uses-sdk element
+  uses_sdk = get_children_with_tag(manifest, 'uses-sdk')
+  if len(uses_sdk) > 1:
+    raise RuntimeError('found multiple uses-sdk elements')
+  elif len(uses_sdk) == 0:
+    raise RuntimeError('missing uses-sdk element')
+
+  uses_sdk = uses_sdk[0]
+
+  min_attr = uses_sdk.getAttributeNodeNS(android_ns, 'minSdkVersion')
+  if min_attr is None:
+    raise RuntimeError('minSdkVersion is not specified')
+
+  target_attr = uses_sdk.getAttributeNodeNS(android_ns, 'targetSdkVersion')
+  if target_attr is None:
+    target_attr = min_attr
+
+  return target_attr.value
+
+
+def main():
+  """Program entry point."""
+  try:
+    args = parse_args()
+
+    doc = minidom.parse(args.input)
+
+    if args.enforce_uses_libraries:
+      enforce_uses_libraries(doc,
+                             args.uses_libraries,
+                             args.optional_uses_libraries)
+
+    if args.extract_target_sdk_version:
+      print(extract_target_sdk_version(doc))
+
+    if args.output:
+      with open(args.output, 'wb') as f:
+        write_xml(f, doc)
+
+  # pylint: disable=broad-except
+  except Exception as err:
+    print('error: ' + str(err), file=sys.stderr)
+    sys.exit(-1)
+
+if __name__ == '__main__':
+  main()
diff --git a/scripts/manifest_check_test.py b/scripts/manifest_check_test.py
new file mode 100755
index 0000000..7baad5d
--- /dev/null
+++ b/scripts/manifest_check_test.py
@@ -0,0 +1,166 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2018 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+"""Unit tests for manifest_fixer.py."""
+
+import sys
+import unittest
+from xml.dom import minidom
+
+import manifest_check
+
+sys.dont_write_bytecode = True
+
+
+def uses_library(name, attr=''):
+  return '<uses-library android:name="%s"%s />' % (name, attr)
+
+
+def required(value):
+  return ' android:required="%s"' % ('true' if value else 'false')
+
+
+class EnforceUsesLibrariesTest(unittest.TestCase):
+  """Unit tests for add_extract_native_libs function."""
+
+  def run_test(self, input_manifest, uses_libraries=None, optional_uses_libraries=None):
+    doc = minidom.parseString(input_manifest)
+    try:
+      manifest_check.enforce_uses_libraries(doc, uses_libraries, optional_uses_libraries)
+      return True
+    except manifest_check.ManifestMismatchError:
+      return False
+
+  manifest_tmpl = (
+      '<?xml version="1.0" encoding="utf-8"?>\n'
+      '<manifest xmlns:android="http://schemas.android.com/apk/res/android">\n'
+      '    <application>\n'
+      '    %s\n'
+      '    </application>\n'
+      '</manifest>\n')
+
+  def test_uses_library(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo'))
+    matches = self.run_test(manifest_input, uses_libraries=['foo'])
+    self.assertTrue(matches)
+
+  def test_uses_library_required(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo', required(True)))
+    matches = self.run_test(manifest_input, uses_libraries=['foo'])
+    self.assertTrue(matches)
+
+  def test_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo', required(False)))
+    matches = self.run_test(manifest_input, optional_uses_libraries=['foo'])
+    self.assertTrue(matches)
+
+  def test_expected_uses_library(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo', required(False)))
+    matches = self.run_test(manifest_input, uses_libraries=['foo'])
+    self.assertFalse(matches)
+
+  def test_expected_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo'))
+    matches = self.run_test(manifest_input, optional_uses_libraries=['foo'])
+    self.assertFalse(matches)
+
+  def test_missing_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('')
+    matches = self.run_test(manifest_input, uses_libraries=['foo'])
+    self.assertFalse(matches)
+
+  def test_missing_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('')
+    matches = self.run_test(manifest_input, optional_uses_libraries=['foo'])
+    self.assertFalse(matches)
+
+  def test_extra_uses_library(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo'))
+    matches = self.run_test(manifest_input)
+    self.assertFalse(matches)
+
+  def test_extra_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % (uses_library('foo', required(False)))
+    matches = self.run_test(manifest_input)
+    self.assertFalse(matches)
+
+  def test_multiple_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo'),
+                                                      uses_library('bar')]))
+    matches = self.run_test(manifest_input, uses_libraries=['foo', 'bar'])
+    self.assertTrue(matches)
+
+  def test_multiple_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo', required(False)),
+                                                      uses_library('bar', required(False))]))
+    matches = self.run_test(manifest_input, optional_uses_libraries=['foo', 'bar'])
+    self.assertTrue(matches)
+
+  def test_order_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo'),
+                                                      uses_library('bar')]))
+    matches = self.run_test(manifest_input, uses_libraries=['bar', 'foo'])
+    self.assertFalse(matches)
+
+  def test_order_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo', required(False)),
+                                                      uses_library('bar', required(False))]))
+    matches = self.run_test(manifest_input, optional_uses_libraries=['bar', 'foo'])
+    self.assertFalse(matches)
+
+  def test_duplicate_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo'),
+                                                      uses_library('foo')]))
+    matches = self.run_test(manifest_input, uses_libraries=['foo'])
+    self.assertTrue(matches)
+
+  def test_duplicate_optional_uses_library(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo', required(False)),
+                                                      uses_library('foo', required(False))]))
+    matches = self.run_test(manifest_input, optional_uses_libraries=['foo'])
+    self.assertTrue(matches)
+
+  def test_mixed(self):
+    manifest_input = self.manifest_tmpl % ('\n'.join([uses_library('foo'),
+                                                      uses_library('bar', required(False))]))
+    matches = self.run_test(manifest_input, uses_libraries=['foo'],
+                            optional_uses_libraries=['bar'])
+    self.assertTrue(matches)
+
+
+class ExtractTargetSdkVersionTest(unittest.TestCase):
+  def test_target_sdk_version(self):
+    manifest = (
+      '<?xml version="1.0" encoding="utf-8"?>\n'
+      '<manifest xmlns:android="http://schemas.android.com/apk/res/android">\n'
+      '    <uses-sdk android:minSdkVersion="28" android:targetSdkVersion="29" />\n'
+      '</manifest>\n')
+    doc = minidom.parseString(manifest)
+    target_sdk_version = manifest_check.extract_target_sdk_version(doc)
+    self.assertEqual(target_sdk_version, '29')
+
+  def test_min_sdk_version(self):
+    manifest = (
+      '<?xml version="1.0" encoding="utf-8"?>\n'
+      '<manifest xmlns:android="http://schemas.android.com/apk/res/android">\n'
+      '    <uses-sdk android:minSdkVersion="28" />\n'
+      '</manifest>\n')
+    doc = minidom.parseString(manifest)
+    target_sdk_version = manifest_check.extract_target_sdk_version(doc)
+    self.assertEqual(target_sdk_version, '28')
+
+if __name__ == '__main__':
+  unittest.main(verbosity=2)
diff --git a/scripts/manifest_fixer.py b/scripts/manifest_fixer.py
index 83868e6..bb14851 100755
--- a/scripts/manifest_fixer.py
+++ b/scripts/manifest_fixer.py
@@ -17,30 +17,20 @@
 """A tool for inserting values from the build system into a manifest."""
 
 from __future__ import print_function
+
 import argparse
 import sys
 from xml.dom import minidom
 
 
-android_ns = 'http://schemas.android.com/apk/res/android'
-
-
-def get_children_with_tag(parent, tag_name):
-  children = []
-  for child in  parent.childNodes:
-    if child.nodeType == minidom.Node.ELEMENT_NODE and \
-       child.tagName == tag_name:
-      children.append(child)
-  return children
-
-
-def find_child_with_attribute(element, tag_name, namespace_uri,
-                              attr_name, value):
-  for child in get_children_with_tag(element, tag_name):
-    attr = child.getAttributeNodeNS(namespace_uri, attr_name)
-    if attr is not None and attr.value == value:
-      return child
-  return None
+from manifest import android_ns
+from manifest import compare_version_gt
+from manifest import ensure_manifest_android_ns
+from manifest import find_child_with_attribute
+from manifest import get_children_with_tag
+from manifest import get_indent
+from manifest import parse_manifest
+from manifest import write_xml
 
 
 def parse_args():
@@ -74,76 +64,6 @@
   return parser.parse_args()
 
 
-def parse_manifest(doc):
-  """Get the manifest element."""
-
-  manifest = doc.documentElement
-  if manifest.tagName != 'manifest':
-    raise RuntimeError('expected manifest tag at root')
-  return manifest
-
-
-def ensure_manifest_android_ns(doc):
-  """Make sure the manifest tag defines the android namespace."""
-
-  manifest = parse_manifest(doc)
-
-  ns = manifest.getAttributeNodeNS(minidom.XMLNS_NAMESPACE, 'android')
-  if ns is None:
-    attr = doc.createAttributeNS(minidom.XMLNS_NAMESPACE, 'xmlns:android')
-    attr.value = android_ns
-    manifest.setAttributeNode(attr)
-  elif ns.value != android_ns:
-    raise RuntimeError('manifest tag has incorrect android namespace ' +
-                       ns.value)
-
-
-def as_int(s):
-  try:
-    i = int(s)
-  except ValueError:
-    return s, False
-  return i, True
-
-
-def compare_version_gt(a, b):
-  """Compare two SDK versions.
-
-  Compares a and b, treating codenames like 'Q' as higher
-  than numerical versions like '28'.
-
-  Returns True if a > b
-
-  Args:
-    a: value to compare
-    b: value to compare
-  Returns:
-    True if a is a higher version than b
-  """
-
-  a, a_is_int = as_int(a.upper())
-  b, b_is_int = as_int(b.upper())
-
-  if a_is_int == b_is_int:
-    # Both are codenames or both are versions, compare directly
-    return a > b
-  else:
-    # One is a codename, the other is not.  Return true if
-    # b is an integer version
-    return b_is_int
-
-
-def get_indent(element, default_level):
-  indent = ''
-  if element is not None and element.nodeType == minidom.Node.TEXT_NODE:
-    text = element.nodeValue
-    indent = text[:len(text)-len(text.lstrip())]
-  if not indent or indent == '\n':
-    # 1 indent = 4 space
-    indent = '\n' + (' ' * default_level * 4)
-  return indent
-
-
 def raise_min_sdk_version(doc, min_sdk_version, target_sdk_version, library):
   """Ensure the manifest contains a <uses-sdk> tag with a minSdkVersion.
 
@@ -151,6 +71,7 @@
     doc: The XML document.  May be modified by this function.
     min_sdk_version: The requested minSdkVersion attribute.
     target_sdk_version: The requested targetSdkVersion attribute.
+    library: True if the manifest is for a library.
   Raises:
     RuntimeError: invalid manifest
   """
@@ -249,6 +170,7 @@
     indent = get_indent(application.previousSibling, 1)
     application.appendChild(doc.createTextNode(indent))
 
+
 def add_uses_non_sdk_api(doc):
   """Add android:usesNonSdkApi=true attribute to <application>.
 
@@ -323,12 +245,6 @@
                        (attr.value, value))
 
 
-def write_xml(f, doc):
-  f.write('<?xml version="1.0" encoding="utf-8"?>\n')
-  for node in doc.childNodes:
-    f.write(node.toxml(encoding='utf-8') + '\n')
-
-
 def main():
   """Program entry point."""
   try:
diff --git a/scripts/manifest_fixer_test.py b/scripts/manifest_fixer_test.py
index 7ec8999..2035421 100755
--- a/scripts/manifest_fixer_test.py
+++ b/scripts/manifest_fixer_test.py
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-"""Unit tests for manifest_fixer_test.py."""
+"""Unit tests for manifest_fixer.py."""
 
 import StringIO
 import sys
@@ -393,10 +393,10 @@
     return output.getvalue()
 
   manifest_tmpl = (
-    '<?xml version="1.0" encoding="utf-8"?>\n'
-    '<manifest xmlns:android="http://schemas.android.com/apk/res/android">\n'
-    '    <application%s/>\n'
-    '</manifest>\n')
+      '<?xml version="1.0" encoding="utf-8"?>\n'
+      '<manifest xmlns:android="http://schemas.android.com/apk/res/android">\n'
+      '    <application%s/>\n'
+      '</manifest>\n')
 
   def extract_native_libs(self, value):
     return ' android:extractNativeLibs="%s"' % value
@@ -425,4 +425,4 @@
 
 
 if __name__ == '__main__':
-  unittest.main()
+  unittest.main(verbosity=2)
diff --git a/ui/build/dumpvars.go b/ui/build/dumpvars.go
index c6e5ddc..4335667 100644
--- a/ui/build/dumpvars.go
+++ b/ui/build/dumpvars.go
@@ -205,8 +205,6 @@
 
 		// Not used, but useful to be in the soong.log
 		"BOARD_VNDK_VERSION",
-		"BUILD_BROKEN_ANDROIDMK_EXPORTS",
-		"BUILD_BROKEN_ENG_DEBUG_TAGS",
 
 		"DEFAULT_WARNING_BUILD_MODULE_TYPES",
 		"DEFAULT_ERROR_BUILD_MODULE_TYPES",
diff --git a/ui/build/proc_sync.go b/ui/build/proc_sync.go
index 857786d..0cfe798 100644
--- a/ui/build/proc_sync.go
+++ b/ui/build/proc_sync.go
@@ -34,6 +34,14 @@
 	if err != nil {
 		ctx.Logger.Fatal(err)
 	}
+	lockfilePollDuration := time.Second
+	lockfileTimeout := time.Second * 10
+	if envTimeout := os.Getenv("SOONG_LOCK_TIMEOUT"); envTimeout != "" {
+		lockfileTimeout, err = time.ParseDuration(envTimeout)
+		if err != nil {
+			ctx.Logger.Fatalf("failure parsing SOONG_LOCK_TIMEOUT %q: %s", envTimeout, err)
+		}
+	}
 	err = lockSynchronous(*lockingInfo, newSleepWaiter(lockfilePollDuration, lockfileTimeout), ctx.Logger)
 	if err != nil {
 		ctx.Logger.Fatal(err)
@@ -41,9 +49,6 @@
 	return lockingInfo
 }
 
-var lockfileTimeout = time.Second * 10
-var lockfilePollDuration = time.Second
-
 type lockable interface {
 	tryLock() error
 	Unlock() error
@@ -80,15 +85,18 @@
 			return nil
 		}
 
-		waited = true
-
 		done, description := waiter.checkDeadline()
 
+		if !waited {
+			logger.Printf("Waiting up to %s to lock %v to ensure no other Soong process is running in the same output directory\n", description, lock.description())
+		}
+
+		waited = true
+
 		if done {
 			return fmt.Errorf("Tried to lock %s, but timed out %s . Make sure no other Soong process is using it",
 				lock.description(), waiter.summarize())
 		} else {
-			logger.Printf("Waiting up to %s to lock %v to ensure no other Soong process is running in the same output directory\n", description, lock.description())
 			waiter.wait()
 		}
 	}