From d3af6b6cd9402fcc974a63e84d9c4ec92cbd1dd4 Mon Sep 17 00:00:00 2001
From: Chris Roby <croby@rover.com>
Date: Fri, 23 May 2014 13:21:10 -0700
Subject: [PATCH] Initial commit

---
 uglify.py | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 uglify.py

diff --git a/uglify.py b/uglify.py
new file mode 100644
index 0000000..c4d68ea
--- /dev/null
+++ b/uglify.py
@@ -0,0 +1,90 @@
+import subprocess
+
+from compressor.exceptions import FilterError
+from compressor.filters import CompilerFilter
+from compressor.js import JsCompressor
+from compressor.utils.stringformat import FormattableString as fstr
+from django.conf import settings
+from django.utils.safestring import mark_safe
+
+
+# For use with node.js' uglifyjs minifier
+class UglifySourcemapFilter(CompilerFilter):
+    command = (
+        "uglifyjs {infiles} -o {outfile} --source-map {mapfile}"
+        " --source-map-url {mapurl} --source-map-root {maproot} -c -m")
+
+    def input(self, **kwargs):
+        return self.content
+
+    def output(self, **kwargs):
+        options = dict(self.options)
+        options['outfile'] = kwargs['outfile']
+
+        infiles = []
+        for infile in kwargs['content_meta']:
+            # type, full_filename, relative_filename
+            infiles.append(infile[2])
+
+        options['infiles'] = ' '.join(f for f in infiles)
+
+        options['mapfile'] = kwargs['outfile'].replace('.js', '.map.js')
+
+        options['mapurl'] = '{}{}'.format(
+            settings.STATIC_URL, options['mapfile'])
+
+        options['maproot'] = settings.STATIC_URL
+
+        self.cwd = kwargs['root_location']
+
+        try:
+            command = fstr(self.command).format(**options)
+
+            proc = subprocess.Popen(
+                command, shell=True, cwd=self.cwd, stdout=self.stdout,
+                stdin=self.stdin, stderr=self.stderr)
+            err = proc.communicate()
+        except (IOError, OSError), e:
+            raise FilterError('Unable to apply %s (%r): %s' %
+                              (self.__class__.__name__, self.command, e))
+        else:
+            if proc.wait() != 0:
+                if not err:
+                    err = ('Unable to apply %s (%s)' %
+                           (self.__class__.__name__, self.command))
+                raise FilterError(err)
+            if self.verbose:
+                self.logger.debug(err)
+
+
+class JsUglifySourcemapCompressor(JsCompressor):
+
+    def output(self, mode='file', forced=False):
+        content = self.filter_input(forced)
+        if not content:
+            return ''
+
+        concatenated_content = '\n'.join(
+            c.encode(self.charset) for c in content)
+
+        if settings.COMPRESS_ENABLED or forced:
+            filepath = self.get_filepath(concatenated_content, basename=None)
+
+            # UglifySourcemapFilter writes the file directly, as it needs to
+            # output the sourcemap as well
+            UglifySourcemapFilter(content).output(
+                outfile=filepath,
+                content_meta=self.split_content,
+                root_location=self.storage.base_location)
+
+            return self.output_file(mode, filepath)
+        else:
+            return concatenated_content
+
+    def output_file(self, mode, new_filepath):
+        """
+        The output method that saves the content to a file and renders
+        the appropriate template with the file's URL.
+        """
+        url = mark_safe(self.storage.url(new_filepath))
+        return self.render_output(mode, {"url": url})