buildSrc/src/main/kotlin/androidx/build/SdkResourceGenerator.kt

/*
 * Copyright 2019 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 androidx.build

import androidx.build.dependencies.AGP_LATEST
import androidx.build.dependencies.KOTLIN_STDLIB
import org.gradle.api.DefaultTask
import org.gradle.api.Project
import org.gradle.api.file.RegularFileProperty
import org.gradle.api.plugins.JavaPluginConvention
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.InputFile
import org.gradle.api.tasks.OutputFile
import org.gradle.api.tasks.TaskAction
import org.gradle.kotlin.dsl.getPlugin
import java.io.File
import java.io.PrintWriter

abstract class SdkResourceGenerator : DefaultTask() {
    @get:Input
    lateinit var prebuiltsRoot: String

    @get:Input
    lateinit var localSupportRepo: String

    @get:InputFile
    abstract val debugKeystore: RegularFileProperty

    @get:Input
    val compileSdkVersion: Int = SupportConfig.TARGET_SDK_VERSION

    @get:Input
    val buildToolsVersion: String = SupportConfig.BUILD_TOOLS_VERSION

    @get:Input
    val minSdkVersion: Int = SupportConfig.DEFAULT_MIN_SDK_VERSION

    @get:Input
    val agpDependency: String = AGP_LATEST

    @get:Input
    val navigationCommon: String = "androidx.navigation:navigation-common:2.0.0"

    @get:Input
    val kotlinStdlib: String = KOTLIN_STDLIB

    @get:Input
    val rootProjectPath: String = project.rootProject.rootDir.absolutePath

    @get:Input
    lateinit var gradleVersion: String

    @get:OutputFile
    abstract val outputFile: RegularFileProperty

    @TaskAction
    fun generateFile() {
        val writer = PrintWriter(outputFile.get().asFile)
        writer.write("prebuiltsRoot=$prebuiltsRoot\n")
        writer.write("localSupportRepo=$localSupportRepo\n")
        writer.write("compileSdkVersion=$compileSdkVersion\n")
        writer.write("buildToolsVersion=$buildToolsVersion\n")
        writer.write("minSdkVersion=$minSdkVersion\n")
        writer.write("debugKeystore=${debugKeystore.get().asFile.canonicalPath}\n")
        writer.write("agpDependency=$agpDependency\n")
        writer.write("navigationCommon=$navigationCommon\n")
        writer.write("kotlinStdlib=$kotlinStdlib\n")
        writer.write("gradleVersion=$gradleVersion\n")
        writer.write("rootProjectPath=$rootProjectPath\n")
        writer.close()
    }

    companion object {
        @JvmStatic
        fun generateForHostTest(project: Project) {
            val generatedDirectory = File(project.buildDir, "generated/resources")
            val provider = project.tasks.register(
                "generateSdkResource",
                SdkResourceGenerator::class.java
            ) {
                it.prebuiltsRoot = project.getPrebuiltsRoot().canonicalPath
                it.debugKeystore.set(project.getKeystore())
                it.localSupportRepo = project.getRepositoryDirectory().canonicalPath
                it.gradleVersion = project.gradle.gradleVersion
                it.outputFile.set(File(generatedDirectory, "sdk.prop"))
            }
            project.tasks.named("compileTestJava").configure { it.dependsOn(provider) }

            val convention = project.convention.getPlugin<JavaPluginConvention>()
            val resources = convention.sourceSets.getByName("test").resources
            resources.srcDirs(setOf(resources.srcDirs, generatedDirectory))
        }
    }
}