Add clean css option to less (#118)

Add clean css option to less

Author: theRustyKnife

docs/compiler-settings.rst

@@ -206,6 +206,9 @@ LESS
 ``include_path``
   List of additional directories to look for imported files (``--include-path`` command line option). Default: ``None``.
 
+``clean_css``
+  Boolean. Set to ``True`` to use the `clean-css <https://github.com/less/less-plugin-clean-css>`_ plugin to minify the output. Default ``False``.
+
 ``global_vars``
   Dictionary of global variables (``--global-var`` command line option). Default: ``None``.
 

static_precompiler/compilers/less.py

@@ -20,12 +20,14 @@ class LESS(base.BaseCompiler):
     IMPORT_RE = re.compile(r"@import\s+(.+?)\s*;", re.DOTALL)
     IMPORT_ITEM_RE = re.compile(r"([\"'])(.+?)\1")
 
-    def __init__(self, executable="lessc", sourcemap_enabled=False, include_path=None, global_vars=None):
+    def __init__(self, executable="lessc", sourcemap_enabled=False, include_path=None, clean_css=False,
+                 global_vars=None):
         self.executable = executable
         self.is_sourcemap_enabled = sourcemap_enabled
         if isinstance(include_path, (list, tuple)):
             include_path = ';'.join(include_path)
         self.include_path = include_path
+        self.clean_css = clean_css
         self.global_vars = global_vars
         super(LESS, self).__init__()
 
@@ -54,6 +56,10 @@ def compile_file(self, source_path):
             args.extend([
                 "--include-path={}".format(self.include_path)
             ])
+        if self.clean_css:
+            args.extend([
+                "--clean-css",
+            ])
         if self.global_vars:
             for variable_name, variable_value in self.global_vars.items():
                 args.extend([