# Scan the tree passed as argv[0] for .rsrc files, skipping .rsrc.df.rsrc
# files, and open these. The effect of this is to create the .rsrc.df.rsrc
# cache files if needed.
# These are needed on OSX: the .rsrc files are in reality AppleSingle-encoded
# files. We decode the resources into a datafork-based resource file.

import macresource
import os
import sys
import getopt

class NoArgsError(Exception):
	pass
	
def handler((verbose, force), dirname, fnames):
	for fn in fnames:
		if fn[-5:] == '.rsrc' and fn[-13:] != '.rsrc.df.rsrc':
			if force:
				try:
					os.unlink(os.path.join(dirname, fn + '.df.rsrc'))
				except IOError:
					pass
			macresource.open_pathname(os.path.join(dirname, fn), verbose=verbose)
			
def main():
	try:
		opts, args = getopt.getopt(sys.argv[1:], 'vf')
		if not args:
			raise NoArgsError
	except (getopt.GetoptError, NoArgsError):
		sys.stderr.write('Usage: cachersrc.py dirname ...\n')
		sys.exit(1)
	verbose = 0
	force = 0
	for o, v in opts:
		if o == '-v':
			verbose = 1
		if o == '-f':
			force = 1
	for dir in sys.argv[1:]:
		os.path.walk(dir, handler, (verbose, force))
		
if __name__ == '__main__':
	main()