add less compiler

compress/compilers/less/__init__.py

+from compress.conf import settings
+from compress.compilers import CompilerBase
+
+
+class LessCompiler(CompilerBase):
+    def match_file(self, filename):
+        return filename.endswith('.less')
+
+    def compile_file(self, content):
+        tmp_file = tempfile.NamedTemporaryFile(mode='w+b')
+        tmp_file.write(css)
+        tmp_file.flush()
+
+        output_file = tempfile.NamedTemporaryFile(mode='w+b')
+
+        command = '%s %s %s %s' % (
+            settings.COMPRESS_LESS_BINARY, tmp_file.name,
+            settings.COMPRESS_LESS_ARGUMENTS, output_file.name
+        )
+
+        command_output = os.popen(command).read()
+
+        compiled_content = output_file.read()
+        output_file.close()
+        tmp_file.close()
+
+        if self.verbose:
+            print command_output
+        return compiled_content

compress/conf/settings.py

@@ -41,6 +41,9 @@ COMPRESS_COFFEE_SCRIPT_ARGUMENTS = getattr(settings, 'COFFEE_SCRIPT_ARGUMENTS',
 COMPRESS_SASS_BINARY = getattr(settings, 'COMPRESS_SASS_BINARY', '/usr/local/bin/sass')
 COMPRESS_SASS_ARGUMENTS = getattr(settings, 'COMPRESS_SASS_ARGUMENTS', '--scss')
 
+COMPRESS_LESS_BINARY = getattr(settings, 'COMPRESS_LESS_BINARY', '/usr/local/bin/lessc')
+COMPRESS_LESS_ARGUMENTS = getattr(settings, 'COFFEE_LESS_ARGUMENTS', '')
+
 if COMPRESS_CSS_COMPRESSORS is None:
     COMPRESS_CSS_COMPRESSORS = []