Add option to specify compression type.

Author: MrTravisB

README.md

@@ -23,8 +23,8 @@ Sample Brubeck and web.py projects are in `examples` folder.
 - **exclude_dirs**: Directories you don't want to be searched. It'd be pointless to search for `less` files in an images directory. This parameter is expected to be a list.
 - **based**: If it's set `True` then LessCSS will generate the `style-(base60).css` version as well (for example; `style-dHCFD.css`). This is useful if you set expire times of static files to a distant future since browsers will not retrieve those files unless the name is different or the cache has expired. This parameter is expected to be a boolean value.
 - **compressed**: If it's set `True` then LessCSS will minimize the generated CSS files. This parameter is expected to be a boolean value.
-- **output_dir**: Absolute path of the folder where compiled CSS files
-should be put.
+- **compression**: Specifies the type of compression to use. Default to the normal compression, 'x'. Other option is to use the [YUI Compressor](http://developer.yahoo.com/yui/compressor/css.html), 'yui'. See "Command-line Usage" at http://lesscss.org/.
+- **output_dir**: Absolute path of the folder where compiled CSS files should be put.
 
 
 ##TODO

lesscss/__init__.py

@@ -27,7 +27,7 @@ class LessCSS(object):
     """
 
     def __init__(self, media_dir='static', exclude_dirs=None, based=True,
-                compressed=True, output_dir=None):
+                compressed=True, compression='x', output_dir=None):
         """ Initialize LessCSS. When you wrap your web application you need to
         define the following parameters:
 
@@ -50,7 +50,13 @@ def __init__(self, media_dir='static', exclude_dirs=None, based=True,
         ``compressed``
             If this is set to `True`, then the compiled CSS file will be
             minimized.
-            
+
+        ``compression``
+            The type of compression to use. Default to standard 'x' compression.
+            Set to 'yui' to use YUI Compressor
+            (http://developer.yahoo.com/yui/compressor/css.html).
+            See "Command-line Usage" at http://lesscss.org/
+
         ``output_dir``
             Define the absolute path of the folder where compiled CSS files
             should be put.
@@ -59,6 +65,7 @@ def __init__(self, media_dir='static', exclude_dirs=None, based=True,
         self._media = media_dir
         self._based = based
         self._compressed = compressed
+        self._compression = compression
         self._excluded = exclude_dirs
         self._output = output_dir.rstrip('/') if output_dir else None
         self.compile()
@@ -109,6 +116,8 @@ def compile(self):
         command_opt = ['lessc', '-x']
         if not self._compressed:
             del command_opt[-1]
+        if self._compressed and self._compression.lower() == 'yui':
+            command_opt[1] = '--yui-compress'
         for i in less:
             filename = os.path.splitext(i)[0]
             css = '%s.css' % filename

setup.py

@@ -30,7 +30,7 @@
 ::
 
     from lesscss import LessCSS
-    LessCSS(media_dir='media', exclude_dirs=['img', 'src'], based=True, compressed=True, output_dir=None)
+    LessCSS(media_dir='media', exclude_dirs=['img', 'src'], based=True, compressed=True, compression='x', output_dir=None)
 
 
 Parameters
@@ -40,6 +40,7 @@
 - **exclude_dirs:** Directories you don't want to be searched. It'd be pointless to search for less files in an images directory. This parameter is expected to be a list.
 - **based:** If it's set True then LessCSS will generate the style-(base60).css version as well (for example; style-dHCFD.css). This is useful if you set expire times of static files to a distant future since browsers will not retrieve those files unless the name is different or the cache has expired. This parameter is expected to be a boolean value.
 - **compressed**: If it's set `True` then LessCSS will minimize the generated CSS files. This parameter is expected to be a boolean value.
+- **compression**: Specifies the type of compression to use. Default to the normal compression, 'x'. Other option is to use the [YUI Compressor](http://developer.yahoo.com/yui/compressor/css.html), 'yui'. See "Command-line Usage" at http://lesscss.org/.
 - **output_dir:** Directory where you put compiled CSS files if different than location of .less file.