build-logic: add android convention plugins

build-logic/android-plugins/build.gradle.kts

@@ -1,3 +1,11 @@
-plugins { `kotlin-dsl` }
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+plugins {
+  `kotlin-dsl`
+  `kotlin-dsl-precompiled-script-plugins`
+}
 
 dependencies { implementation(libs.build.agp) }

build-logic/android-plugins/src/main/kotlin/com.github.android-password-store.android-application.gradle.kts

@@ -0,0 +1,63 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+import com.android.build.gradle.internal.dsl.BaseAppModuleExtension
+import flavors.FlavorDimensions
+import flavors.ProductFlavors
+import flavors.configureSlimTests
+import org.gradle.kotlin.dsl.configure
+
+plugins {
+  id("com.android.application")
+  id("com.github.android-password-store.android-common")
+}
+
+fun Project.isSnapshot(): Boolean {
+  with(project.providers) {
+    val workflow = environmentVariable("GITHUB_WORKFLOW").forUseAtConfigurationTime()
+    val snapshot = environmentVariable("SNAPSHOT").forUseAtConfigurationTime()
+    return workflow.isPresent || snapshot.isPresent
+  }
+}
+
+extensions.configure<BaseAppModuleExtension> {
+  val minifySwitch =
+    project.providers.environmentVariable("DISABLE_MINIFY").forUseAtConfigurationTime()
+
+  adbOptions.installOptions("--user 0")
+
+  buildFeatures {
+    viewBinding = true
+    buildConfig = true
+  }
+
+  buildTypes {
+    named("release") {
+      isMinifyEnabled = !minifySwitch.isPresent
+      setProguardFiles(
+        listOf(
+          "proguard-android-optimize.txt",
+          "proguard-rules.pro",
+          "proguard-rules-missing-classes.pro",
+        )
+      )
+      buildConfigField("boolean", "ENABLE_DEBUG_FEATURES", "${project.isSnapshot()}")
+    }
+    named("debug") {
+      applicationIdSuffix = ".debug"
+      versionNameSuffix = "-debug"
+      isMinifyEnabled = false
+      buildConfigField("boolean", "ENABLE_DEBUG_FEATURES", "true")
+    }
+  }
+
+  flavorDimensions.add(FlavorDimensions.FREE)
+  productFlavors {
+    register(ProductFlavors.FREE) {}
+    register(ProductFlavors.NON_FREE) {}
+  }
+
+  project.configureSlimTests()
+}

build-logic/android-plugins/src/main/kotlin/com.github.android-password-store.android-common.gradle.kts

@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+import com.android.build.gradle.TestedExtension
+
+extensions.configure<TestedExtension> {
+  setCompileSdkVersion(31)
+  defaultConfig {
+    minSdk = 23
+    targetSdk = 29
+  }
+
+  sourceSets {
+    named("main") { java.srcDirs("src/main/kotlin") }
+    named("test") { java.srcDirs("src/test/kotlin") }
+    named("androidTest") { java.srcDirs("src/androidTest/kotlin") }
+  }
+
+  packagingOptions {
+    resources.excludes.add("**/*.version")
+    resources.excludes.add("**/*.txt")
+    resources.excludes.add("**/*.kotlin_module")
+    resources.excludes.add("**/plugin.properties")
+    resources.excludes.add("**/META-INF/AL2.0")
+    resources.excludes.add("**/META-INF/LGPL2.1")
+  }
+
+  compileOptions {
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
+  }
+
+  testOptions {
+    animationsDisabled = true
+    unitTests.isReturnDefaultValues = true
+  }
+}

build-logic/android-plugins/src/main/kotlin/com.github.android-password-store.android-library.gradle.kts

@@ -0,0 +1,13 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+import flavors.configureSlimTests
+
+plugins {
+  id("com.android.library")
+  id("com.github.android-password-store.android-common")
+}
+
+project.configureSlimTests()

build-logic/android-plugins/src/main/kotlin/flavors/ProductFlavors.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package flavors
+
+object FlavorDimensions {
+  const val FREE = "free"
+}
+
+object ProductFlavors {
+  const val FREE = "free"
+  const val NON_FREE = "nonFree"
+}

build-logic/android-plugins/src/main/kotlin/flavors/SlimTests.kt

@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package flavors
+
+import com.android.build.api.variant.ApplicationAndroidComponentsExtension
+import com.android.build.api.variant.LibraryAndroidComponentsExtension
+import org.gradle.api.Project
+import org.gradle.kotlin.dsl.findByType
+import org.gradle.language.nativeplatform.internal.BuildType
+
+/**
+ * When the "slimTests" project property is provided, disable the unit test tasks on `release` build
+ * type and `nonFree` product flavor to avoid running the same tests repeatedly in different build
+ * variants.
+ *
+ * Examples: `./gradlew test -PslimTests` will run unit tests for `nonFreeDebug` and `debug` build
+ * variants in Android App and Library projects, and all tests in JVM projects.
+ */
+internal fun Project.configureSlimTests() {
+  if (providers.gradleProperty(SLIM_TESTS_PROPERTY).forUseAtConfigurationTime().isPresent) {
+    // disable unit test tasks on the release build type for Android Library projects
+    extensions.findByType<LibraryAndroidComponentsExtension>()?.run {
+      beforeVariants(selector().withBuildType(BuildType.RELEASE.name)) {
+        it.enableUnitTest = false
+        it.enableAndroidTest = false
+      }
+    }
+
+    // disable unit test tasks on the release build type and free flavor for Android Application
+    // projects.
+    extensions.findByType<ApplicationAndroidComponentsExtension>()?.run {
+      beforeVariants(selector().withBuildType(BuildType.RELEASE.name)) { it.enableUnitTest = false }
+      beforeVariants(selector().withFlavor(FlavorDimensions.FREE to ProductFlavors.NON_FREE)) {
+        it.enableUnitTest = false
+        it.enableAndroidTest = false
+      }
+    }
+  }
+}
+
+private const val SLIM_TESTS_PROPERTY = "slimTests"