Gradle - Delete files with certain extension

Question

I am using Gradle and would like to delete all files with a certain extension. Is that something Gradle can do?

Answer 1

There are several ways to delete files with certain extension.In general,you must select some files;then filter some of them and finally delete reminding file.For example try this :

def tree = fileTree('${SOME_DIR}') 
tree.include '**/*.${SOME_EXT}'
tree.each { it.delete() }

Answer 2

You may customize default clean task to include other directories and files for deletion like:

clean{
  delete 'buildDir', 'generated'
}

If you want use glob, you may use fileTree for example, or any other convenient methods to list files:

clean{
  delete 'build', 'target', fileTree(dockerBuildDir) { include '**/*.rpm' }
}

Answer 3

clean {
  delete xxxx
}

The above clean is not so correct. Because it actually calls a method named clean by task name. The kind of method is normally used to configure the task and it happened in the configuration time not in the task-execute time.

The following is a more reasonable way if you need modify the default clean. It's my example to delete all files except one excludes. The delete action in clean task really happen in task-execute time now.

    clean {

    Task self = delegate
    self.deleteAllActions()
    self << {

        project.delete(fileTree(dir: buildDir).exclude("**/tmp/expandedArchives/org.jacoco.agent*/**"))

        def emptyDirs = []

        project.fileTree(dir: buildDir).visit {
            File f = it.file

            if (f.isDirectory() ) {
                def children = project.fileTree(f).filter { it.isFile() }.files
                if (children.size() == 0) {
                    emptyDirs << f
                }
            }
        }

        // reverse so that we do the deepest folders first
        emptyDirs.reverseEach {
            println "delete file: " + it + ", " + project.delete(it) //it.delete()
        }
    }
}

Answer 4

Use the Gradle Delete task.

task deleteFiles(type: Delete) {
    delete fileTree('dir/foo') {
        include '**/*.ext'
    }
}