Gradle union task, execute in order

01-gradle-union-task-order.md

Gradle: Union wrapper task to execute subtasks in order

This is how to create a union tasks to execute subtasks in order

task A { doLast { println 'A' }}
task B { doLast { println 'B' }}
task C { doLast { println 'C' }}
task D { doLast { println 'D' }}

task unionTask {
  def containedTasks = [A, B, C, D]
  dependsOn containedTasks
  placeTasksInOrder(containedTasks)
}

def placeTasksInOrder(List tasks) {
  for (int i=0; i < tasks.size() -1; i++) {
    def earlierTask = tasks.get(i)
    def laterTask   = tasks.get(i +1)
    laterTask.mustRunAfter(earlierTask)
  }
}

dependsOn causes the other tasks to run when unionTask is run and the helper function placeTasksInOrder places the tasks in order by calling mustRunAfter

See also Stackoverflow