CheckMergedManifestTask.kt

/*
 * Copyright (C) 2024 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.
 */

import org.gradle.api.DefaultTask
import org.gradle.api.file.DirectoryProperty
import org.gradle.api.file.RegularFileProperty
import org.gradle.api.provider.Property
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.InputFile
import org.gradle.api.tasks.OutputDirectory
import org.gradle.api.tasks.TaskAction
import org.gradle.api.tasks.PathSensitive
import org.gradle.api.tasks.PathSensitivity
import java.lang.RuntimeException

abstract class CheckMergedManifestTask : DefaultTask() {

    // In order for the task to be up-to-date when the inputs have not changed,
    // the task must declare an output, even if it's not used. Tasks with no
    // output are always run regardless of whether the inputs changed
    @get:OutputDirectory
    abstract val output: DirectoryProperty

    @get:Input
    abstract val variantName: Property<String>

    @get:InputFile
    @get:PathSensitive(PathSensitivity.NONE)
    abstract val mergedManifest: RegularFileProperty

    @TaskAction
    fun taskAction() {
        if (!mergedManifest.isPresent || !mergedManifest.get().asFile.exists()) {
            throw RuntimeException("Merged manifest does not exist.")
        }

        val mergedManifestContents = mergedManifest.get().asFile.readText()
        if (variantName.get() == "flavor1Debug" &&
            !mergedManifestContents.contains("android:versionName=\"updatedFlavor1DebugVersionName\"")) {
            throw RuntimeException("Merged manifest does not contain updated versionName.")
        }
        if (variantName.get() == "flavor2Release" &&
            !mergedManifestContents.contains("android:versionCode=\"2\"")) {
            throw RuntimeException("Merged manifest does not contain updated versionCode.")
        }
    }
}