applied a patch from Martin Ficker. See http://www.nabble.com/Patch-for-Buildorder-td17625563.html

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@9821 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/model/DependencyGraph.java

@@ -52,7 +52,7 @@ import java.awt.image.BufferedImage;
  * @see Hudson#getDependencyGraph() 
  * @author Kohsuke Kawaguchi
  */
-public final class DependencyGraph {
+public final class DependencyGraph implements Comparator <AbstractProject> {
 
     private Map<AbstractProject, List<AbstractProject>> forward = new HashMap<AbstractProject, List<AbstractProject>>();
     private Map<AbstractProject, List<AbstractProject>> backward = new HashMap<AbstractProject, List<AbstractProject>>();
@@ -312,4 +312,17 @@ public final class DependencyGraph {
     };
 
     public static final DependencyGraph EMPTY = new DependencyGraph(false);
+
+    /**
+     * Compare to Projects based on the topological order defined by this Dependency Graph
+     */
+    public int compare(AbstractProject o1, AbstractProject o2) {
+        Set<AbstractProject> o1sdownstreams = getTransitiveDownstream(o1);
+        Set<AbstractProject> o2sdownstreams = getTransitiveDownstream(o2);
+        if (o1sdownstreams.contains(o2)) {
+            if (o2sdownstreams.contains(o1)) return 0; else return 1;                       
+        } else {
+            if (o2sdownstreams.contains(o1)) return -1; else return 0; 
+        }               
+    }
 }

core/src/main/java/hudson/tasks/BuildTrigger.java

@@ -26,7 +26,9 @@ import org.kohsuke.stapler.StaplerResponse;
 import javax.servlet.ServletException;
 import java.io.IOException;
 import java.io.PrintStream;
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 import java.util.StringTokenizer;
 import java.util.logging.Level;
@@ -123,13 +125,18 @@ public class BuildTrigger extends Publisher implements DependecyDeclarer, Matrix
         if(trigger==null || !build.getResult().isWorseThan(trigger.getThreshold())) {
             PrintStream logger = listener.getLogger();
             //Trigger all downstream Project of the project, not just those defined by this buildtrigger
-            List <AbstractProject> downstreamProjects = build.getProject().getDownstreamProjects();
+            List <AbstractProject> downstreamProjects = 
+                new ArrayList<AbstractProject> (build.getProject().getDownstreamProjects()); 
+                
+            // Sort topologically            
+            Collections.sort(downstreamProjects, 
+                    Collections.reverseOrder (Hudson.getInstance().getDependencyGraph()));
+            
             for (AbstractProject p : downstreamProjects) {
                 if(p.isDisabled()) {
                     logger.println(Messages.BuildTrigger_Disabled(p.getName()));
                     continue;
                 }
-
                 // this is not completely accurate, as a new build might be triggered
                 // between these calls
                 String name = p.getName()+" #"+p.getNextBuildNumber();