GitVersionTask.kt

/*
 * Copyright 2022 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
 *
 *       https://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.RegularFileProperty
import org.gradle.api.tasks.OutputFile
import org.gradle.api.tasks.TaskAction

abstract class GitVersionTask: DefaultTask() {
    @get:OutputFile
    abstract val gitVersionOutputFile: RegularFileProperty

    @TaskAction
    fun taskAction() {
        // this would be the code to get the tip of tree version,
        // val firstProcess = ProcessBuilder("git","rev-parse --short HEAD").start()
        // val error = firstProcess.errorStream.readBytes().decodeToString()
        // if (error.isNotBlank()) {
        //      System.err.println("Git error : $error")
        // }
        // var gitVersion = firstProcess.inputStream.readBytes().decodeToString()
        // but here, we are just hardcoding :
        gitVersionOutputFile.get().asFile.writeText("1234")
    }
}