Provide generic config defaults.

  * Support a generic /etc/mock/defaults.cfg config file. The values
    defined in this file are overwritten by any definitions in the
    specific /etc/mock/CHROOT.cfg files.

    This part just introduces mock-0.4/etc/defaults.cfg and
    adds the last chunk in the patch to mock-0.4/mock.py.


 This patch was written in 2006 for bawue.net by Hans Ulrich Niedermann in
 2006 after an idea by Andreas Thienemann. Testing and final clean-up was 
 one by Andreas Thienemann.

 The source code this patch is based on has been downloaded from

    http://fedoraproject.org/projects/mock/releases/mock-0.4.tar.gz

 etc/defaults.cfg |    8 ++++++++
 mock.py          |    8 ++++++++
 2 files changed, 16 insertions(+)

diff -uNr mock-20060513.orig/etc/defaults.cfg mock-20060513/etc/defaults.cfg
--- mock-20060513.orig/etc/defaults.cfg	1970-01-01 01:00:00.000000000 +0100
+++ mock-20060513/etc/defaults.cfg	2006-05-13 16:46:19.480038297 +0200
@@ -0,0 +1,8 @@
+# mock defaults
+#
+# Define default values here.
+# These values are overwritten in the /etc/mock/CHROOT.cfg files.
+#
+# Example:
+#
+# config_opts['foo'] = bar
diff -uNr mock-20060513.orig/mock.py mock-20060513/mock.py
--- mock-20060513.orig/mock.py	2006-05-13 16:38:46.487358000 +0200
+++ mock-20060513/mock.py	2006-05-13 16:47:52.874952632 +0200
@@ -735,6 +735,14 @@
     if options.configdir:
         config_path = options.configdir
     
+    # Read in the default values which can be overwritten
+    # with the more specific config being loaded below.
+    cfg = os.path.join(config_path, 'defaults.cfg')
+    if os.path.exists(cfg):
+        execfile(cfg)
+    else:
+        pass # not finding the defaults.cfg file is no error
+    
     # read in the config file by chroot name
     if options.chroot.endswith('.cfg'):
         cfg = '%s/%s' % (config_path, options.chroot)