buildSrc/src/main/kotlin/com/android/tools/metalava/MetalavaModelProviderPlugin.kt

/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * 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.
 */

package com.android.tools.metalava

import org.gradle.api.Plugin
import org.gradle.api.Project
import org.gradle.api.tasks.testing.Test
import org.gradle.kotlin.dsl.named

/**
 * Plugin that must be applied by a project that provides an implementation of the `metalava-model`
 * API.
 */
class MetalavaModelProviderPlugin : Plugin<Project> {

    override fun apply(target: Project) {
        with(target) {
            // Add a special non-transitive configuration for the metalava-model-test-suite,
            val modelTestSuite =
                configurations.register("modelTestSuite") { it.setTransitive(false) }

            // For every jar in the modelTestSuite configuration unzip it and add the tree to the
            // test.testClassesDirs list which is what is searched to find the tests to run.
            tasks.named<Test>("test").configure { test ->
                modelTestSuite.get().forEach { test.testClassesDirs += zipTree(it) }
            }

            val modelProject = project(":metalava-model")
            val reporterProject = project(":metalava-reporter")
            val testSuiteProject = project(":metalava-model-testsuite")

            // Add a dependency onto the metalava-model and metalava-reporter projects.
            dependencies.add("implementation", modelProject)
            dependencies.add("implementation", reporterProject)

            // Add dependencies to the metalava-model-testsuite project in the testImplementation
            // and modelTestSuite configurations. The first is needed for compilation, the second is
            // needed to add the testsuite classes to the list of test classes to run.
            dependencies.add(modelTestSuite.name, testSuiteProject)
            dependencies.add("testImplementation", testSuiteProject)
        }
    }
}