1 files changed, 78 insertions, 0 deletions
diff --git a/nikola/plugins/task/gzip.py b/nikola/plugins/task/gzip.py
new file mode 100644
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+++ b/nikola/plugins/task/gzip.py
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+# -*- coding: utf-8 -*-
+
+# Copyright © 2012-2013 Roberto Alsina and others.
+
+# Permission is hereby granted, free of charge, to any
+# person obtaining a copy of this software and associated
+# documentation files (the "Software"), to deal in the
+# Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the
+# Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice
+# shall be included in all copies or substantial portions of
+# the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
+# OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+"""Create gzipped copies of files."""
+
+import gzip
+import os
+import shlex
+import subprocess
+
+from nikola.plugin_categories import TaskMultiplier
+
+
+class GzipFiles(TaskMultiplier):
+    """If appropiate, create tasks to create gzipped versions of files."""
+
+    name = "gzip"
+    is_default = True
+
+    def process(self, task, prefix):
+        if not self.site.config['GZIP_FILES']:
+            return []
+        if task.get('name') is None:
+            return []
+        gzip_task = {
+            'file_dep': [],
+            'targets': [],
+            'actions': [],
+            'basename': '{0}_gzip'.format(prefix),
+            'name': task.get('name').split(":", 1)[-1] + '.gz',
+            'clean': True,
+        }
+        targets = task.get('targets', [])
+        flag = False
+        for target in targets:
+            ext = os.path.splitext(target)[1]
+            if (ext.lower() in self.site.config['GZIP_EXTENSIONS'] and
+                    target.startswith(self.site.config['OUTPUT_FOLDER'])):
+                flag = True
+                gzipped = target + '.gz'
+                gzip_task['file_dep'].append(target)
+                gzip_task['targets'].append(gzipped)
+                gzip_task['actions'].append((create_gzipped_copy, (target, gzipped, self.site.config['GZIP_COMMAND'])))
+        if not flag:
+            return []
+        return [gzip_task]
+
+
+def create_gzipped_copy(in_path, out_path, command=None):
+    if command:
+        subprocess.check_call(shlex.split(command.format(filename=in_path)))
+    else:
+        with gzip.GzipFile(out_path, 'wb+') as outf:
+            with open(in_path, 'rb') as inf:
+                outf.write(inf.read())