From ab5a2a40c1318459a28dcce3293f3c3732107715 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Thu, 1 Nov 2012 00:06:17 +0100
Subject: Packages: add priority to sources and sort according to it

---
 schemas/packages.xsd                                     | 10 ++++++++++
 src/lib/Bcfg2/Server/Plugins/Packages/PackagesSources.py |  2 ++
 src/lib/Bcfg2/Server/Plugins/Packages/Source.py          |  3 +++
 3 files changed, 15 insertions(+)

diff --git a/schemas/packages.xsd b/schemas/packages.xsd
index fc5a1356c..3f2fe4f57 100644
--- a/schemas/packages.xsd
+++ b/schemas/packages.xsd
@@ -225,6 +225,16 @@
         </xsd:documentation>
       </xsd:annotation>
     </xsd:attribute>
+    <xsd:attribute type="xsd:integer" name="priority">
+      <xsd:annotation>
+        <xsd:documentation>
+          The priority of the source. This is used to order the
+          sources. After sorting, the first source, that could
+          deliver the package, is used. If not supplied the default
+          priority is 500.
+        </xsd:documentation>
+      </xsd:annotation>
+    </xsd:attribute>
     <xsd:attributeGroup ref="py:genshiAttrs"/>
   </xsd:complexType>
 
diff --git a/src/lib/Bcfg2/Server/Plugins/Packages/PackagesSources.py b/src/lib/Bcfg2/Server/Plugins/Packages/PackagesSources.py
index 1af046ec0..9db521aae 100644
--- a/src/lib/Bcfg2/Server/Plugins/Packages/PackagesSources.py
+++ b/src/lib/Bcfg2/Server/Plugins/Packages/PackagesSources.py
@@ -106,6 +106,8 @@ class PackagesSources(Bcfg2.Server.Plugin.StructFile):
                 source = self.source_from_xml(xsource)
                 if source is not None:
                     self.entries.append(source)
+            sorted(self.entries, key=(lambda source: source.priority),
+                   reverse=True)
     Index.__doc__ = Bcfg2.Server.Plugin.StructFile.Index.__doc__ + """
 
         ``Index`` is responsible for calling :func:`source_from_xml`
diff --git a/src/lib/Bcfg2/Server/Plugins/Packages/Source.py b/src/lib/Bcfg2/Server/Plugins/Packages/Source.py
index 86f7698f7..43f6b91fb 100644
--- a/src/lib/Bcfg2/Server/Plugins/Packages/Source.py
+++ b/src/lib/Bcfg2/Server/Plugins/Packages/Source.py
@@ -188,6 +188,9 @@ class Source(Debuggable):  # pylint: disable=R0902
         #: The "name" attribute from :attr:`xsource`
         self.name = None
 
+        #: The "priority" attribute from :attr:`xsource`
+        self.priority = xsource.get('priority', 500)
+
         #: A list of predicates that are used to determine if this
         #: source applies to a given
         #: :class:`Bcfg2.Server.Plugins.Metadata.ClientMetadata`
-- 
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