android/makefile: add tv-specific build variant (#445)

android/makefile: add tv-specific build

 updates tailscale/corp#21644

This will build a second tailscale-release-tv.aab with the leanback flag set
suitable for submission for android-tv.

Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>

.gitignore

@@ -19,12 +19,8 @@ android/local.properties
 .idea
 
 # Output files from the Makefile:
-tailscale-debug.apk
-tailscale-release.aab
-tailscale-fdroid.apk
-tailscale-new-fdroid.apk
-tailscale-new-debug.apk
-tailscale-test.apk
+*.apk
+*.aab
 
 # Signing key
 tailscale.jks

Makefile

@@ -8,10 +8,11 @@
 # The docker image to use for the build environment.  Changing this
 # will force a rebuild of the docker image.  If there is an existing image
 # with this name, it will be used.
-DOCKER_IMAGE=tailscale-android-build-amd64-1
+DOCKER_IMAGE=tailscale-android-build-amd64-2
 
 DEBUG_APK=tailscale-debug.apk
 RELEASE_AAB=tailscale-release.aab
+RELEASE_TV_AAB=tailscale-tv-release.aab
 LIBTAILSCALE=android/libs/libtailscale.aar
 TAILSCALE_VERSION=$(shell ./version/tailscale-version.sh 200)
 OUR_VERSION=$(shell git describe --dirty --exclude "*" --always --abbrev=200)
@@ -88,10 +89,16 @@ apk: $(DEBUG_APK) ## Build the debug APK
 .PHONY: tailscale-debug
 tailscale-debug: $(DEBUG_APK) ## Build the debug APK
 
+# Builds the release AAB and signs it (phone/tablet/chromeOS variant)
 .PHONY: release
 release: jarsign-env $(RELEASE_AAB) ## Build the release AAB
 	@jarsigner -sigalg SHA256withRSA -digestalg SHA-256 -keystore $(JKS_PATH) -storepass $(JKS_PASSWORD) $(RELEASE_AAB) tailscale
 
+# Builds the release AAB and signs it (androidTV variant)
+.PHONY: release-tv
+release-tv: jarsign-env $(RELEASE_TV_AAB) ## Build the release AAB
+	@jarsigner -sigalg SHA256withRSA -digestalg SHA-256 -keystore $(JKS_PATH) -storepass $(JKS_PASSWORD) $(RELEASE_TV_AAB) tailscale
+
 # gradle-dependencies groups together the android sources and libtailscale needed to assemble tests/debug/release builds.
 .PHONY: gradle-dependencies
 gradle-dependencies: $(shell find android -type f -not -path "android/build/*" -not -path '*/.*') $(LIBTAILSCALE)
@@ -104,6 +111,10 @@ $(RELEASE_AAB): gradle-dependencies
 	(cd android && ./gradlew test bundleRelease)
 	install -C ./android/build/outputs/bundle/release/android-release.aab $@
 
+$(RELEASE_TV_AAB): gradle-dependencies
+	(cd android && ./gradlew test bundleRelease_tv)
+	install -C ./android/build/outputs/bundle/release_tv/android-release_tv.aab $@
+
 tailscale-test.apk: gradle-dependencies
 	(cd android && ./gradlew assembleApplicationTestAndroidTest)
 	install -C ./android/build/outputs/apk/androidTest/applicationTest/android-applicationTest-androidTest.apk $@
@@ -166,9 +177,16 @@ androidpath:
 	@echo "export ANDROID_SDK_ROOT=$(ANDROID_SDK_ROOT)"
 	@echo 'export PATH=$(ANDROID_HOME)/cmdline-tools/latest/bin:$(ANDROID_HOME)/platform-tools:$$PATH'
 
-.PHONY: tag_release
-tag_release: ## Tag a release
+.PHONY: bump_version_code
+bump_version_code: ## Bump the version code in the android build.gradle
+	@echo "Current Version Code:"
+	@grep "versionCode" android/build.gradle
 	sed -i'.bak' 's/versionCode $(VERSIONCODE)/versionCode $(VERSIONCODE_PLUSONE)/' android/build.gradle && rm android/build.gradle.bak
+	@echo "New Version Code:"
+	@grep "versionCode" android/build.gradle
+
+.PHONY: tag_release
+tag_release: bump_version_code ## Increment the playstore version code by 1
 	sed -i'.bak' 's/versionName .*/versionName "$(VERSION_LONG)"/' android/build.gradle && rm android/build.gradle.bak
 	git commit -sm "android: bump version code" android/build.gradle
 	git tag -a "$(VERSION_LONG)"
@@ -249,7 +267,7 @@ docker-remove-shell-image: ## Removes all docker shell image
 
 .PHONY: clean
 clean: ## Remove build artifacts.  Does not purge docker build envs.  Use dockerRemoveEnv for that.
-	-rm -rf android/build $(DEBUG_APK) $(RELEASE_AAB) $(LIBTAILSCALE) android/libs *.apk *.aab
+	-rm -rf android/build $(DEBUG_APK) $(RELEASE_AAB) $(RELEASE_TV_AAB) $(LIBTAILSCALE) android/libs *.apk *.aab
 	-pkill -f gradle
 
 .PHONY: help

android/build.gradle

@@ -65,11 +65,27 @@ android {
     buildTypes {
         applicationTest {
             initWith debug
+            manifestPlaceholders.leanbackRequired = false
             buildConfigField "String", "GITHUB_USERNAME", "\"" + getLocalProperty("githubUsername")+"\""
             buildConfigField "String", "GITHUB_PASSWORD", "\"" + getLocalProperty("githubPassword")+"\""
             buildConfigField "String", "GITHUB_2FA_SECRET", "\"" + getLocalProperty("github2FASecret")+"\""
         }
+        debug {
+            manifestPlaceholders.leanbackRequired = false
+        }
         release {
+            manifestPlaceholders.leanbackRequired = false
+            minifyEnabled true
+
+            shrinkResources true
+
+            proguardFiles getDefaultProguardFile(
+                    'proguard-android-optimize.txt'),
+                    'proguard-rules.pro'
+        }
+        release_tv {
+            manifestPlaceholders.leanbackRequired = true
+
             minifyEnabled true
 
             shrinkResources true

android/src/main/AndroidManifest.xml

@@ -24,7 +24,7 @@
     <!-- Signal support for Android TV -->
     <uses-feature
         android:name="android.software.leanback"
-        android:required="false" />
+        android:required="${leanbackRequired}" />
     <uses-feature
         android:name="android.hardware.touchscreen"
         android:required="false" />

docker/DockerFile.amd64-build

@@ -44,4 +44,8 @@ RUN ./android/gradlew
 # Build the android app
 CMD make clean
 CMD make release
+# Build the android tv app.  We need to bump the version code by 1
+# so the AAB is unique.
+CMD make bump_version_code
+CMD make release-tv