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#!/usr/bin/python
###############
# cmpcss
# Compress a CSS file in prepration for production use.
#
# AUTHOR
# Michael Crute (mcrute@gmail.com)
# DATE
# 16 June 2006
# VERSION
# 1.0
# PURPOSE
# An implementation of a CSS compressor in Python. Written to
# prepare development CSS to production ready CSS. Does the
# following:
# * Removes spaces intelligently
# * Removes charset declarations
# * Removes extra semicolons
# * Flattens the file (tabs and line breaks)
# USAGE
# cmpcss site_dev.css > site_prod.css
# LICENSE
# You may copy and redistribute this program as you see fit, with no
# restrictions.
# WARRANTY
# This program comes with NO warranty, real or implied. If it eats
# your CSS, it's not my problem, you should have kept a backup.
###############
import sys
import re
#import string
# The chewy caramel center of the program
# Don't bitch about the short variable names, it makes it easy to read
def cleanline(theLine):
# Kills line breaks, tabs, and double spaces
p = re.compile('(\n|\r|\t|\f|\v)+')
m = p.sub('',theLine)
# Kills double spaces
p = re.compile('( )+')
m = p.sub(' ',m)
# Removes last semicolon before }
p = re.compile('(; }|;})+')
m = p.sub('}',m)
# Removes space before {
p = re.compile('({ )+')
m = p.sub('{',m)
# Removes all comments
p = re.compile('/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/')
m = p.sub('',m)
# Strip off the Charset
p = re.compile('@CHARSET .*;')
m = p.sub('',m)
# Strip spaces before the {
p = re.compile(' {')
m = p.sub('{',m)
# Strip space after :
p = re.compile(': ')
m = p.sub(':',m)
# Strip space after ,
p = re.compile(', ')
m = p.sub(',',m)
# Strip space after ;
p = re.compile('; ')
m = p.sub(';',m)
# May return to add color code compression
# not a huge space saver so also not high priority
# p = re.compile('.*#[0-9A-F]{6}.*')
# cc = p.match(m)
# if cc:
# cc = compcolor(m)
return m
#def compcolor(m):
# Boring usage info for people too dumb to use the program
def printusage():
print ''
print 'SoftGroup CSS Compressor'
print ''
print 'This is a compressor for CSS files.'
print 'As far as I know it doesn\'t break the standards'
print 'compliance of the file. If you can find a way'
print 'to make it break a file please email me.'
print ''
print 'Usage: cmpcss <filename>'
sys.exit()
# The main routine
if ( __name__ == "__main__" ):
if (len(sys.argv) <= 1):
printusage()
# Open the file for reading
try:
theFile = file(sys.argv[1], "r")
except IOError:
print 'I couldn\'t open your file.'
sys.exit()
# Initialize temp so it's not scoped to the for loop
temp = ''
# Loop through the file line by line and clean it
for line in theFile:
temp = temp + cleanline(line)
# Once more, clean the entire file string
print cleanline(temp)
# Cleanup after ourselves
theFile.close()
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