Easy hashing. Generates all the .sha1 and .md5 files for all files recursively.

hash.groovy

#!/usr/bin/env groovy


File root;
if (args.length == 0)
    root = new File('.').getCanonicalFile()
else
    root = new File(args[0])

root.eachFileRecurse(FileType.FILES) { file ->
    def path = file.path

    if (path.endsWith(".sha1") || path.endsWith(".md5"))
        return; // skip hash files

    println "hashing $path"

    def hashes = hash file
    hashes.each { key, val ->
        new File(path + "." + key).write(val)
    }
}

import java.security.MessageDigest;
import groovy.io.FileType;

def hash(final file) {
   MessageDigest digestM = MessageDigest.getInstance("MD5")
   MessageDigest digestS = MessageDigest.getInstance("SHA1")

   byte[] bytes = file.bytes;
   digestM.update bytes
   digestS.update bytes

   def out = [:]
   out["md5"] = new BigInteger(1, digestM.digest()).toString(16).padLeft(32, '0')
   out["sha1"] = new BigInteger(1, digestS.digest()).toString(16).padLeft(32, '0')
   return out
}