set default pkgmgr to auto and preferred to use zypp

Signed-off-by: Gui Chen <gui.chen@intel.com>

1 files changed, 15 insertions, 9 deletions

diff --git a/plugins/imager/raw_plugin.py b/plugins/imager/raw_plugin.py
index 8f31c03..b2356d2 100644
--- a/plugins/imager/raw_plugin.py
+++ b/plugins/imager/raw_plugin.py
@@ -71,17 +71,23 @@ class RawPlugin(ImagerPlugin):
 
         # try to find the pkgmgr
         pkgmgr = None
-        for (key, pcls) in pluginmgr.get_plugins('backend').iteritems():
-            if 'auto' == creatoropts['pkgmgr']:
-                pkgmgr = pcls
-                break
-            elif key == creatoropts['pkgmgr']:
-                pkgmgr = pcls
-                break
+        backends = pluginmgr.get_plugins('backend')
+        if 'auto' == creatoropts['pkgmgr']:
+            for key in configmgr.prefer_backends:
+                if key in backends:
+                    pkgmgr = backends[key]
+                    break
+        else:
+            for key in backends.keys():
+                if key == creatoropts['pkgmgr']:
+                    pkgmgr = backends[key]
+                    break
 
         if not pkgmgr:
-            pkgmgrs = pluginmgr.get_plugins('backend').keys()
-            raise errors.CreatorError("Can't find package manager: %s (availables: %s)" % (creatoropts['pkgmgr'], ', '.join(pkgmgrs)))
+            raise errors.CreatorError("Can't find backend: %s, "
+                                      "available choices: %s" %
+                                      (creatoropts['pkgmgr'],
+                                       ','.join(backends.keys())))
 
         creator = raw.RawImageCreator(creatoropts, pkgmgr, opts.compress_image)