gradle/hacks/dummy-outputs.gradle

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

// LUCENE-9505: utility function that sets up dummy outputs for a task so that
// clean[TaskName] works and allows selective re-runs.

def setupDummyOutputs = { Task task ->
  File dummyOutput = file("${task.project.buildDir}/tasks/${task.name}/dummy-output.txt")
  task.outputs.file(dummyOutput)
  task.doLast {
    if (!dummyOutput.exists()) {
      dummyOutput.createNewFile()
    }
  }
}

allprojects {
  tasks.matching {
    it.name.startsWith("ecjLint") ||
    it.name in [
        "gradlewScriptsTweaked",
        "validateSourcePatterns"
    ] }.all { Task task ->
    task.logger.info("Setting up ${task.path} as no-output.")
    setupDummyOutputs(task)
  }
}