add uglifyjs filter

compress/conf/settings.py

@@ -27,6 +27,9 @@ COMPRESS_YUI_JS_ARGUMENTS = getattr(settings, 'COMPRESS_YUI_JS_ARGUMENTS', '')
 COMPRESS_CLOSURE_BINARY = getattr(settings, 'COMPRESS_CLOSURE_BINARY', 'java -jar compiler.jar')
 COMPRESS_CLOSURE_JS_ARGUMENTS = getattr(settings, 'COMPRESS_CLOSURE_JS_ARGUMENTS', '')
 
+COMPRESS_UGLIFYJS_BINARY = getattr(settings, 'COMPRESS_UGLIFYJS_BINARY', '/usr/local/bin/uglifyjs')
+COMPRESS_UGLIFYJS_ARGUMENTS = getattr(settings, 'COMPRESS_UGLIFYJS_ARGUMENTS', '-nc')
+
 if COMPRESS_CSS_FILTERS is None:
     COMPRESS_CSS_FILTERS = []
 

compress/filters/uglifyjs/__init__.py

+import subprocess
+
+from compress.conf import settings
+from compress.filter_base import FilterBase, FilterError
+
+
+class UglifyJSCompressorFilter(FilterBase):
+    def filter_js(self, js):
+        command = '%s %s' % (settings.COMPRESS_UGLIFYJS_BINARY, settings.COMPRESS_UGLIFYJS_ARGUMENTS)
+
+        if self.verbose:
+            command += ' --verbose'
+
+        p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, \
+            stdin=subprocess.PIPE, stderr=subprocess.PIPE)
+        p.stdin.write(js)
+        p.stdin.close()
+
+        filtered_js = p.stdout.read()
+        p.stdout.close()
+
+        err = p.stderr.read()
+        p.stderr.close()
+
+        if p.wait() != 0:
+            if not err:
+                err = 'Unable to apply UglifyJS Compressor filter'
+
+            raise FilterError(err)
+
+        if self.verbose:
+            print err
+
+        return filtered_js