AAPT2: Add a APK filtering.

Allow resource files to be removed from the final artifact based on the
density and locale configuration in the config file. The APK is split
along the density, locale and ABI axis. Each split is generated from the
original APK without modifying the original. The new resource table is
written back to the file system with unneeded assets etc removed.

Test: Unit tests
Test: Manually run optimize command against an APK and inspect results
Test: Installed split searchlite APK (after resigning) and ran on N6

Change-Id: If73597dcfd88c02d2616518585d0e25a5c6a84d1
diff --git a/tools/aapt2/configuration/ConfigurationParser_test.cpp b/tools/aapt2/configuration/ConfigurationParser_test.cpp
index ab3b7ec..5bd0831 100644
--- a/tools/aapt2/configuration/ConfigurationParser_test.cpp
+++ b/tools/aapt2/configuration/ConfigurationParser_test.cpp
@@ -67,18 +67,15 @@
       <screen-density>xxxhdpi</screen-density>
     </screen-density-group>
     <locale-group label="europe">
-      <locale lang="en"/>
-      <locale lang="es"/>
-      <locale lang="fr"/>
-      <locale lang="de"/>
+      <locale>en</locale>
+      <locale>es</locale>
+      <locale>fr</locale>
+      <locale>de</locale>
     </locale-group>
     <locale-group label="north-america">
-      <locale lang="en"/>
-      <locale lang="es" region="MX"/>
-      <locale lang="fr" region="CA"/>
-    </locale-group>
-    <locale-group label="all">
-      <locale/>
+      <locale>en</locale>
+      <locale>es-rMX</locale>
+      <locale>fr-rCA</locale>
     </locale-group>
     <android-sdk-group label="19">
       <android-sdk
@@ -156,10 +153,9 @@
   EXPECT_EQ(3ul, value.screen_density_groups["large"].size());
   EXPECT_EQ(6ul, value.screen_density_groups["alldpi"].size());
 
-  EXPECT_EQ(3ul, value.locale_groups.size());
+  EXPECT_EQ(2ul, value.locale_groups.size());
   EXPECT_EQ(4ul, value.locale_groups["europe"].size());
   EXPECT_EQ(3ul, value.locale_groups["north-america"].size());
-  EXPECT_EQ(1ul, value.locale_groups["all"].size());
 
   EXPECT_EQ(1ul, value.android_sdk_groups.size());
   EXPECT_EQ(1ul, value.android_sdk_groups["19"].size());
@@ -198,7 +194,7 @@
   EXPECT_EQ(1ul, config.artifacts.size());
 
   auto& artifact = config.artifacts.front();
-  EXPECT_EQ("", artifact.name); // TODO: make this fail.
+  EXPECT_FALSE(artifact.name);  // TODO: make this fail.
   EXPECT_EQ("arm", artifact.abi_group.value());
   EXPECT_EQ("large", artifact.screen_density_group.value());
   EXPECT_EQ("europe", artifact.locale_group.value());
@@ -298,10 +294,10 @@
 TEST_F(ConfigurationParserTest, LocaleGroupAction) {
   static constexpr const char* xml = R"xml(
     <locale-group label="europe">
-      <locale lang="en"/>
-      <locale lang="es"/>
-      <locale lang="fr"/>
-      <locale lang="de"/>
+      <locale>en</locale>
+      <locale>es</locale>
+      <locale>fr</locale>
+      <locale>de</locale>
     </locale-group>)xml";
 
   auto doc = test::BuildXmlDom(xml);
@@ -313,16 +309,12 @@
   ASSERT_EQ(1ul, config.locale_groups.size());
   ASSERT_EQ(1u, config.locale_groups.count("europe"));
 
-  auto& out = config.locale_groups["europe"];
+  const auto& out = config.locale_groups["europe"];
 
-  Locale en;
-  en.lang = std::string("en");
-  Locale es;
-  es.lang = std::string("es");
-  Locale fr;
-  fr.lang = std::string("fr");
-  Locale de;
-  de.lang = std::string("de");
+  ConfigDescription en = test::ParseConfigOrDie("en");
+  ConfigDescription es = test::ParseConfigOrDie("es");
+  ConfigDescription fr = test::ParseConfigOrDie("fr");
+  ConfigDescription de = test::ParseConfigOrDie("de");
 
   ASSERT_THAT(out, ElementsAre(en, es, fr, de));
 }
@@ -425,14 +417,14 @@
   Artifact x86;
   x86.abi_group = {"x86"};
 
-  auto x86_result = x86.ToArtifactName("something.{abi}.apk", &diag);
+  auto x86_result = x86.ToArtifactName("something.${abi}.apk", &diag);
   ASSERT_TRUE(x86_result);
   EXPECT_EQ(x86_result.value(), "something.x86.apk");
 
   Artifact arm;
   arm.abi_group = {"armeabi-v7a"};
 
-  auto arm_result = arm.ToArtifactName("app.{abi}.apk", &diag);
+  auto arm_result = arm.ToArtifactName("app.${abi}.apk", &diag);
   ASSERT_TRUE(arm_result);
   EXPECT_EQ(arm_result.value(), "app.armeabi-v7a.apk");
 }
@@ -447,8 +439,8 @@
   artifact.locale_group = {"en-AU"};
   artifact.android_sdk_group = {"26"};
 
-  auto result =
-      artifact.ToArtifactName("app.{density}_{locale}_{feature}_{gl}.sdk{sdk}.{abi}.apk", &diag);
+  auto result = artifact.ToArtifactName(
+      "app.${density}_${locale}_${feature}_${gl}.sdk${sdk}.${abi}.apk", &diag);
   ASSERT_TRUE(result);
   EXPECT_EQ(result.value(), "app.ldpi_en-AU_df1_glx1.sdk26.mips64.apk");
 }
@@ -458,7 +450,7 @@
   Artifact x86;
   x86.abi_group = {"x86"};
 
-  EXPECT_FALSE(x86.ToArtifactName("something.{density}.apk", &diag));
+  EXPECT_FALSE(x86.ToArtifactName("something.${density}.apk", &diag));
   EXPECT_FALSE(x86.ToArtifactName("something.apk", &diag));
 }
 
@@ -466,7 +458,7 @@
   StdErrDiagnostics diag;
   Artifact artifact;
 
-  EXPECT_FALSE(artifact.ToArtifactName("something.{density}.apk", &diag));
+  EXPECT_FALSE(artifact.ToArtifactName("something.${density}.apk", &diag));
   EXPECT_TRUE(artifact.ToArtifactName("something.apk", &diag));
 }
 
@@ -475,8 +467,8 @@
   Artifact artifact;
   artifact.screen_density_group = {"mdpi"};
 
-  EXPECT_TRUE(artifact.ToArtifactName("something.{density}.apk", &diag));
-  EXPECT_FALSE(artifact.ToArtifactName("something.{density}.{density}.apk", &diag));
+  ASSERT_TRUE(artifact.ToArtifactName("something.${density}.apk", &diag));
+  EXPECT_FALSE(artifact.ToArtifactName("something.${density}.${density}.apk", &diag));
 }
 
 TEST(ArtifactTest, Nesting) {
@@ -484,36 +476,36 @@
   Artifact x86;
   x86.abi_group = {"x86"};
 
-  EXPECT_FALSE(x86.ToArtifactName("something.{abi{density}}.apk", &diag));
+  EXPECT_FALSE(x86.ToArtifactName("something.${abi${density}}.apk", &diag));
 
-  const Maybe<std::string>& name = x86.ToArtifactName("something.{abi{abi}}.apk", &diag);
-  EXPECT_TRUE(name);
-  EXPECT_EQ(name.value(), "something.{abix86}.apk");
+  const Maybe<std::string>& name = x86.ToArtifactName("something.${abi${abi}}.apk", &diag);
+  ASSERT_TRUE(name);
+  EXPECT_EQ(name.value(), "something.${abix86}.apk");
 }
 
 TEST(ArtifactTest, Recursive) {
   StdErrDiagnostics diag;
   Artifact artifact;
-  artifact.device_feature_group = {"{gl}"};
+  artifact.device_feature_group = {"${gl}"};
   artifact.gl_texture_group = {"glx1"};
 
-  EXPECT_FALSE(artifact.ToArtifactName("app.{feature}.{gl}.apk", &diag));
+  EXPECT_FALSE(artifact.ToArtifactName("app.${feature}.${gl}.apk", &diag));
 
   artifact.device_feature_group = {"df1"};
-  artifact.gl_texture_group = {"{feature}"};
+  artifact.gl_texture_group = {"${feature}"};
   {
-    const auto& result = artifact.ToArtifactName("app.{feature}.{gl}.apk", &diag);
-    EXPECT_TRUE(result);
-    EXPECT_EQ(result.value(), "app.df1.{feature}.apk");
+    const auto& result = artifact.ToArtifactName("app.${feature}.${gl}.apk", &diag);
+    ASSERT_TRUE(result);
+    EXPECT_EQ(result.value(), "app.df1.${feature}.apk");
   }
 
   // This is an invalid case, but should be the only possible case due to the ordering of
   // replacement.
-  artifact.device_feature_group = {"{gl}"};
+  artifact.device_feature_group = {"${gl}"};
   artifact.gl_texture_group = {"glx1"};
   {
-    const auto& result = artifact.ToArtifactName("app.{feature}.apk", &diag);
-    EXPECT_TRUE(result);
+    const auto& result = artifact.ToArtifactName("app.${feature}.apk", &diag);
+    ASSERT_TRUE(result);
     EXPECT_EQ(result.value(), "app.glx1.apk");
   }
 }