#! /usr/bin/python

#+
# NAME:
#	www_help_sync
# PROCEDURE:
#	Compare ascii files
# CALLING SEQUENCE:
#	www_help_sync.py ext=ext new_dir old_dir
# INPUTS:
#	new_dir		directory containing new help files
#	old_dir		directory containing old help files
# CALLS:
#	tiny.args, tiny.start
# PROCEDURE:
#	HTML files in directory 'new_dir' are compared with files
#	in directory 'old_dir' with the same base name
#	(file name, plus extension).
#	HTML files in old_dir not present in new_dir are deleted.
#	HTML files in new_dir not present or different from the
#	corresponding file in old_dir is moved to new_dir.
#	The remaining HTML files in new_dir are deleted.
# MODIFICATION HISTORY:
#	FEB-2003, Paul Hick (UCSD/CASS; pphick@ucsd.edu)
#-
	
import sys, os
from tiny import args, start, hide_env

args = args( sys.argv )

extension = start( '-ext=', sys.argv )
if extension == '':
	extension = '.html'

if len(args) == 3:
	new_dir = args[1]
	old_dir = args[2]
else:
	new_dir = raw_input('New directory : ')
	old_dir = raw_input('Old directory : ')

if not os.path.isdir(new_dir):
	print 'Not a directory: ', hide_env(new_dir)
	sys.exit(1)

if not os.path.isdir(old_dir):
	print 'Not a directory: ', hide_env(old_dir)
	sys.exit(1)


# Loop over old files. Delete files not present in new_dir.

for base_file in os.listdir(old_dir):

	new_file = os.path.join(new_dir,base_file)
	old_file = os.path.join(old_dir,base_file)

	if (os.path.splitext(old_file))[1] == extension:

		if not os.path.isfile(new_file):
			os.remove(old_file)
			print 'removing ', hide_env(old_file)

# Loop over new files. Only move different files to old_dir.
# Delete the rest.

for base_file in os.listdir(new_dir):

	new_file = os.path.join(new_dir,base_file)
	old_file = os.path.join(old_dir,base_file)

	if (os.path.splitext(base_file))[1] == extension:

		keep_old = os.path.isfile(old_file)

		if keep_old:
			new_lines = (open(new_file, 'r')).read()
			old_lines = (open(old_file, 'r')).read()
			keep_old = len(new_lines) == len(old_lines) and new_lines == old_lines

		if keep_old:
			os.remove(new_file)
		else:
			os.rename(new_file,old_file)
			print 'updating', hide_env(old_file)

sys.exit(1)