ChroMATERIAL_RenameFiles.gradle

task ChroMATERIAL_RenameFiles(type: Copy) {

    String sourceDir = 'src/colors'

    String XML = '.xml'     // Extension to keep
    String ICLS = '.icls'   // Extension to remove

    // "Copy" files into the same directory.
    from sourceDir
    destinationDir file(sourceDir)

    String fileName

    rename { String file ->

        // Only delete the xml file of the associated icls files that are present in the directory
        if (file.contains(ICLS)) {

            fileName = file.replace(ICLS, '')
            delete fileName.concat(XML)

        }

        // Rename all icls file extensions to be xml files
        file.replace(ICLS, XML)
    }

    // Lastly, delete all remaining icls files from the directory
    doLast {
        delete fileTree(sourceDir) {
            include('**/*'.concat(ICLS))
        }
    }
}