supporting filtering for SCMs

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@16430 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/Functions.java

@@ -59,6 +59,8 @@ import hudson.tasks.Builder;
 import hudson.tasks.Publisher;
 import hudson.util.Area;
 import hudson.util.Iterators;
+import hudson.scm.SCM;
+import hudson.scm.SCMDescriptor;
 import org.acegisecurity.providers.anonymous.AnonymousAuthenticationToken;
 import org.apache.commons.jelly.JellyContext;
 import org.apache.commons.jelly.JellyTagException;
@@ -610,6 +612,10 @@ public class Functions {
         return BuildStepDescriptor.filter(Publisher.all(), project.getClass());
     }
 
+    public static List<SCMDescriptor<?>> getSCMDescriptors(AbstractProject<?,?> project) {
+        return SCM._for(project);
+    }
+
     public static List<Descriptor<ComputerLauncher>> getComputerLauncherDescriptors() {
         return Hudson.getInstance().getDescriptorList(ComputerLauncher.class);
     }