[FIXED HUDSON-2488] affectedPaths are computed correctly to MavenModule relativePaths

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@18223 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/scm/SubversionChangeLogSet.java

@@ -26,6 +26,8 @@ package hudson.scm;
 import hudson.model.AbstractBuild;
 import hudson.model.User;
 import hudson.scm.SubversionChangeLogSet.LogEntry;
+import hudson.scm.SubversionSCM.ModuleLocation;
+
 import org.kohsuke.stapler.export.Exported;
 import org.kohsuke.stapler.export.ExportedBean;
 
@@ -154,13 +156,48 @@ public final class SubversionChangeLogSet extends ChangeLogSet<LogEntry> {
         public Collection<String> getAffectedPaths() {
             return new AbstractList<String>() {
                 public String get(int index) {
-                    return paths.get(index).value;
+                    return preparePath(paths.get(index).value);
                 }
                 public int size() {
                     return paths.size();
                 }
             };
         }
+        
+        private String preparePath(String path) {
+            SubversionSCM scm = (SubversionSCM) getParent().build.getProject().getScm();
+            ModuleLocation[] locations = scm.getLocations();
+            for (int i = 0; i < locations.length; i++) {
+                String commonPart = findCommonPart(locations[i].remote, path);
+                if (commonPart != null) {
+                    if (path.startsWith("/")) {
+                        path = path.substring(1);
+                    }
+                    String newPath = path.substring(commonPart.length());
+                    if (newPath.startsWith("/")) {
+                        newPath = newPath.substring(1);
+                    }
+                    return newPath;
+                }
+            }
+            return path;
+        }
+        
+        private String findCommonPart(String folder, String filePath) {
+            if (folder == null || filePath == null) {
+                return null;
+            }
+            if (filePath.startsWith("/")) {
+                filePath = filePath.substring(1);
+            }
+            for (int i = 0; i < folder.length(); i++) {
+                String part = folder.substring(i);
+                if (filePath.startsWith(part)) {
+                    return part;
+                }
+            }
+            return null;
+        }
 
         public void setUser(String author) {
             this.author = User.get(author);