From 82a405c7943192e3bba3340efe7a8d07a0e26b70 Mon Sep 17 00:00:00 2001
From: Josh Boyer <jwboyer@fedoraproject.org>
Date: Jan 16 2015 17:51:19 +0000
Subject: Compress docker images with xz


Imagefactory supports gzip, bzip2, and xz compression formats.  Upstream
Docker prefers xz, so switch to using that.

---

diff --git a/builder/kojid b/builder/kojid
index ebdf024..c6ded86 100755
--- a/builder/kojid
+++ b/builder/kojid
@@ -3238,7 +3238,7 @@ class BaseImageTask(OzImageTask):
         @returns:
             a dict with some metadata about the image
         """
-        img_opts = {'compress': 'gzip'}
+        img_opts = {'compress': 'xz'}
         targ = self._do_target_image(self.base_img.base_image.identifier,
             'docker', img_opts=img_opts)
         return {'image': targ.target_image.data}