Use kotlin script for buildSrc gradle file. (#3999)

* Use kotlin script for buildSrc gradle file.

* Fix build-src workflow

* address review comment.

* address review comments.

* cleanup

Author: vkryachko

.github/workflows/build-src-check.yml

@@ -31,7 +31,7 @@ jobs:
         env:
           FIREBASE_CI: 1
         run: |
-          ./gradlew -b buildSrc/build.gradle -PenablePluginTests=true check
+          ./gradlew -b buildSrc/build.gradle.kts -PenablePluginTests=true check
       - name: Publish Test Results
         uses: EnricoMi/publish-unit-test-result-action@v1
         with:

buildSrc/build.gradle

@@ -0,0 +1,107 @@
+// Copyright 2018 Google LLC
+//
+// 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.
+
+plugins {
+    id("org.jlleitschuh.gradle.ktlint") version "9.2.1"
+    id("com.github.sherter.google-java-format") version "0.9"
+    `kotlin-dsl`
+}
+
+repositories {
+    mavenLocal()
+    maven(url = "https://maven.google.com/")
+    mavenCentral()
+    maven(url = "https://storage.googleapis.com/android-ci/mvn/")
+    maven(url = "https://plugins.gradle.org/m2/")
+}
+
+// Refer latest "perf-plugin" released version on https://maven.google.com/web/index.html?q=perf-plugin#com.google.firebase:perf-plugin
+// The System property allows us to integrate with an unreleased version from https://bityl.co/3oYt.
+// Refer go/fireperf-plugin-test-on-head for more details.
+val perfPluginVersion = System.getenv("FIREBASE_PERF_PLUGIN_VERSION") ?: "1.4.1"
+
+googleJavaFormat {
+    toolVersion = "1.10.0"
+}
+
+dependencies {
+    // Firebase performance plugin, it should be added here because of how gradle dependency
+    // resolution works, otherwise it breaks Fireperf Test Apps.
+    // See https://github.com/gradle/gradle/issues/12286
+    implementation("com.google.firebase:perf-plugin:$perfPluginVersion")
+
+    implementation("com.google.auto.value:auto-value-annotations:1.8.1")
+    annotationProcessor("com.google.auto.value:auto-value:1.6.5")
+    implementation("digital.wup:android-maven-publish:3.6.3")
+    implementation(kotlin("gradle-plugin", "1.4.32"))
+    implementation("org.json:json:20210307")
+
+    implementation("org.eclipse.aether:aether-api:1.0.0.v20140518")
+    implementation("org.eclipse.aether:aether-util:1.0.0.v20140518")
+    implementation("org.eclipse.aether:aether-impl:1.0.0.v20140518")
+    implementation("org.eclipse.aether:aether-connector-basic:1.0.0.v20140518")
+    implementation("org.eclipse.aether:aether-transport-file:1.0.0.v20140518")
+    implementation("org.eclipse.aether:aether-transport-http:1.0.0.v20140518")
+    implementation("org.eclipse.aether:aether-transport-wagon:1.0.0.v20140518")
+    implementation("org.apache.maven:maven-aether-provider:3.1.0")
+
+    implementation("com.google.code.gson:gson:2.8.9")
+    implementation("org.jetbrains.dokka:dokka-android-gradle-plugin:0.9.17-g013-9b8280a")
+    implementation("com.android.tools.build:gradle:3.4.3")
+    implementation("gradle.plugin.com.github.sherter.google-java-format:google-java-format-gradle-plugin:0.9")
+
+    testImplementation("junit:junit:4.13.2")
+    testImplementation("com.google.truth:truth:1.1.2")
+    testImplementation("commons-io:commons-io:2.6")
+}
+
+gradlePlugin {
+    plugins {
+        register("licensePlugin") {
+            id = "LicenseResolverPlugin"
+            implementationClass = "com.google.firebase.gradle.plugins.license.LicenseResolverPlugin"
+        }
+        register("multiProjectReleasePlugin") {
+            id = "MultiProjectReleasePlugin"
+            implementationClass = "com.google.firebase.gradle.MultiProjectReleasePlugin"
+        }
+        register("publishingPlugin") {
+            id = "PublishingPlugin"
+            implementationClass = "com.google.firebase.gradle.plugins.publish.PublishingPlugin"
+        }
+        register("firebaseLibraryPlugin") {
+            id = "firebase-library"
+            implementationClass = "com.google.firebase.gradle.plugins.FirebaseLibraryPlugin"
+        }
+
+        register("firebaseJavaLibraryPlugin") {
+            id = "firebase-java-library"
+            implementationClass = "com.google.firebase.gradle.plugins.FirebaseJavaLibraryPlugin"
+        }
+
+        register("firebaseVendorPlugin") {
+            id = "firebase-vendor"
+            implementationClass = "com.google.firebase.gradle.plugins.VendorPlugin"
+        }
+    }
+}
+
+tasks.withType<Test> {
+    testLogging {
+        // Make sure output from standard out or error is shown in Gradle output.
+        showStandardStreams = true
+    }
+    val enablePluginTests: String? by rootProject
+    enabled = enablePluginTests == "true"
+}

buildSrc/build.gradle.kts

@@ -11,4 +11,3 @@
 // 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.
-