build: convert to Gradle Kotlin DSL

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

buildSrc/src/main/java/BaseProjectConfig.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+import com.android.build.gradle.TestedExtension
+import com.android.build.gradle.internal.dsl.BaseAppModuleExtension
+import org.gradle.api.JavaVersion
+import org.gradle.api.Project
+import org.gradle.api.tasks.Delete
+import org.gradle.api.tasks.testing.Test
+import org.gradle.api.tasks.testing.logging.TestLogEvent
+import org.gradle.api.tasks.wrapper.Wrapper
+import org.gradle.kotlin.dsl.repositories
+import org.gradle.kotlin.dsl.withType
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+/**
+ * Configure root project.
+ * Note that classpath dependencies still need to be defined in the `buildscript` block in the top-level build.gradle.kts file.
+ */
+internal fun Project.configureForRootProject() {
+  // register task for cleaning the build directory in the root project
+  tasks.register("clean", Delete::class.java) {
+    delete(rootProject.buildDir)
+  }
+  tasks.withType<Wrapper> {
+    gradleVersion = "6.7"
+    distributionType = Wrapper.DistributionType.ALL
+    distributionSha256Sum = "0080de8491f0918e4f529a6db6820fa0b9e818ee2386117f4394f95feb1d5583"
+  }
+}
+
+/**
+ * Configure all projects including the root project
+ */
+internal fun Project.configureForAllProjects() {
+  repositories {
+    google()
+    jcenter()
+    maven { setUrl("https://jitpack.io") }
+  }
+  tasks.withType<KotlinCompile> {
+    kotlinOptions {
+      jvmTarget = JavaVersion.VERSION_1_8.toString()
+      freeCompilerArgs = freeCompilerArgs + additionalCompilerArgs
+      languageVersion = "1.4"
+    }
+  }
+  tasks.withType<Test> {
+    maxParallelForks = Runtime.getRuntime().availableProcessors() * 2
+    testLogging {
+      events(TestLogEvent.PASSED, TestLogEvent.SKIPPED, TestLogEvent.FAILED)
+    }
+  }
+}
+/**
+ * Apply configuration options for Android Application projects.
+ */
+@Suppress("UnstableApiUsage")
+internal fun BaseAppModuleExtension.configureAndroidApplicationOptions(project: Project) {
+  project.tasks.withType<KotlinCompile> {
+    kotlinOptions {
+      freeCompilerArgs = freeCompilerArgs + listOf(
+        "-Xopt-in=kotlin.RequiresOptIn",
+        "-Xopt-in=kotlinx.coroutines.ExperimentalCoroutinesApi",
+        "-Xopt-in=androidx.compose.material.ExperimentalMaterialApi"
+      )
+    }
+  }
+}
+
+/**
+ * Apply baseline configurations for all Android projects (Application and Library).
+ */
+@Suppress("UnstableApiUsage")
+internal fun TestedExtension.configureCommonAndroidOptions() {
+  compileSdkVersion(30)
+
+  defaultConfig {
+    minSdkVersion(23)
+    targetSdkVersion(30)
+  }
+
+  packagingOptions {
+    exclude("**/*.version")
+    exclude("**/*.txt")
+    exclude("**/*.kotlin_module")
+    exclude("**/plugin.properties")
+  }
+
+  compileOptions {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+  }
+
+  testOptions.animationsDisabled = true
+}