rename_images.sc

/**
 * Ammonite script to rename images.
 *
 * This script will lower case the file names and replace all the spaces and dots by `_`.
 *
 * Source dir and destination dir have to be different because some file systems don't consider the cases.
 * So a file name `ABC.png` will not be renamed `abc.png` if the source and destination are the same...s
 */

import $ivy.`com.github.pathikrit::better-files:3.8.0`
import better.files._
import java.nio.file.Files


val sourceDir: File = file"path/to/files/"
val destDir: File = file"renamed/files/destination/path/must/be/different/than/source"

sourceDir.entries.zipWithIndex.foreach { case (file, i) =>
  val extension = file.extension.get
  val newName = file
                  .name
                  .split("\\.png")
                  .head
                  .toLowerCase
                  .replaceAll("\\.", "_")
                  .replaceAll(" ", "_")

  println(i + ": " + file.name + " - " + newName)

  Files.move(file.path, (destDir / s"$newName$extension").path, File.CopyOptions(overwrite = true): _*)
}

println("Hello world")