cleaner.gradle

task deleteBuildDirs(type: Delete) {
  doLast {
    def buildDirs = []
    file(".").eachFileRecurse(groovy.io.FileType.DIRECTORIES) { File file ->
      if (file.name == "build") {
        buildDirs << file
      }
    }

    buildDirs.reverseEach {
      println "Removing ${it.path}"
      it.deleteDir()
    }
  }
}

task deleteEmptyDirs() {
  def emptyDirs = []
  project.fileTree(dir: '.')
      .matching { include { element -> element.directory } }
      .visit { element ->
        if (project.fileTree(element.file).filter { it.isFile() }.files.size() == 0) {
          emptyDirs << element.file
        }
      }
  emptyDirs.reverseEach { dir ->
    println "Removing $dir"
    project.delete(dir)
  }
}

task deleteIdeaFiles(type: Delete) {
  println "Removing ${rootProject.rootDir}/.idea"
  delete ".idea"
  file(".").eachFileRecurse(groovy.io.FileType.FILES) { File file ->
    //Delete all files *.iml
    if (file.name.endsWith('.iml')) {
      println "Removing ${file.path}"
      delete file
    }
  }
}

task cleanAll(type: Delete) {
  dependsOn deleteBuildDirs, deleteEmptyDirs, deleteIdeaFiles
}