#!/usr/bin/env python
# Convert filenames in the given directories recursively between character
# sets. Usage:
#   transcode-filenames [-f FROM-CHARSET] [-t TO-CHARSET] [-n] dir [dir ...]
# The default is ISO-8859-1 to UTF-8.
# -n shows the renames it would perform rather than doing them.

import os, os.path, stat, sys, getopt

def transcode_dir(d, from_set, to_set, dummy):
	fs = os.listdir(d)
	for f in fs:
		old_name = os.path.join(d, f)
		st = os.stat(old_name)
		if stat.S_ISDIR(st.st_mode):
			transcode_dir(old_name, from_set, to_set, dummy)
		nf = f.decode(from_set).encode(to_set)
		new_name = os.path.join(d, nf)
		if dummy:
			print repr(old_name), "->", repr(new_name)
		else:
			os.rename(old_name, new_name)

if __name__ == "__main__":
	from_set = "ISO-8859-1"
	to_set = "UTF-8"
	dummy = False

	try:
		opts, args = getopt.getopt(sys.argv[1:], "f:t:n")
	except getopt.GetoptError, s:
		print s
		sys.exit(1)

	for o, a in opts:
		if o == "-f":
			from_set = a
		elif o == "-t":
			to_set = a
		elif o == "-n":
			dummy = True

	for d in args:
		transcode_dir(d, from_set, to_set, dummy)