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# -*- coding: utf-8 -*-
"""
Tool for converting Less files to Scss
Usage: python -m scss.less2scss [file]
"""
# http://stackoverflow.com/questions/14970224/anyone-know-of-a-good-way-to-convert-from-less-to-sass
from __future__ import unicode_literals, absolute_import, print_function
import re
import os
import sys
class Less2Scss(object):
at_re = re.compile(r'@(?!(media|import|mixin|font-face)(\s|\())')
mixin_re = re.compile(r'\.([\w\-]*)\s*\((.*)\)\s*\{')
include_re = re.compile(r'(\s|^)\.([\w\-]*\(?.*\)?;)')
functions_map = {
'spin': 'adjust-hue',
}
functions_re = re.compile(r'(%s)\(' % '|'.join(functions_map))
def convert(self, content):
content = self.convertVariables(content)
content = self.convertMixins(content)
content = self.includeMixins(content)
content = self.convertFunctions(content)
return content
def convertVariables(self, content):
# Matches any @ that doesn't have 'media ' or 'import ' after it.
content = self.at_re.sub('$', content)
return content
def convertMixins(self, content):
content = self.mixin_re.sub('@mixin \1(\2) {', content)
return content
def includeMixins(self, content):
content = self.mixin_re.sub('\1@include \2', content)
return content
def convertFunctions(self, content):
content = self.functions_re.sub(lambda m: '%s(' % self.functions_map[m.group(0)], content)
return content
def less2scss(options, args):
if not args:
args = ['-']
less2scss = Less2Scss()
for source_path in args:
if source_path == '-':
source = sys.stdin
destiny = sys.stdout
else:
try:
source = open(source_path)
destiny_path, ext = os.path.splitext(source_path)
destiny_path += '.scss'
if not options.force and os.path.exists(destiny_path):
raise IOError("File already exists: %s" % destiny_path)
destiny = open(destiny_path, 'w')
except Exception as e:
error = "%s" % e
if destiny_path in error:
ignoring = "Ignoring"
else:
ignoring = "Ignoring %s" % destiny_path
print("WARNING -- %s. %s" % (ignoring, error), file=sys.stderr)
continue
content = source.read()
content = less2scss.convert(content)
destiny.write(content)
def main():
from optparse import OptionParser, SUPPRESS_HELP
parser = OptionParser(usage="Usage: %prog [file]",
description="Converts Less files to Scss.",
add_help_option=False)
parser.add_option("-f", "--force", action="store_true",
dest="force", default=False,
help="Forces overwriting output file if it already exists")
parser.add_option("-?", action="help", help=SUPPRESS_HELP)
parser.add_option("-h", "--help", action="help",
help="Show this message and exit")
parser.add_option("-v", "--version", action="store_true",
help="Print version and exit")
options, args = parser.parse_args()
if options.version:
from scss.tool import print_version
print_version()
else:
less2scss(options, args)
if __name__ == "__main__":
main()
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