Added less2scss command

scss/less2scss.py

@@ -0,0 +1,106 @@
+# -*- 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()

setup.py

@@ -120,6 +120,7 @@ def run_setup(with_binary):
         entry_points="""
         [console_scripts]
         pyscss = scss.tool:main
+        less2scss = scss.less2scss:main
         """,
     )