find SCMSource even if NullSCM now associated to build

Author: mguillem

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/BitbucketBuildStatusNotifications.java

@@ -30,6 +30,7 @@
 import edu.umd.cs.findbugs.annotations.NonNull;
 import hudson.Extension;
 import hudson.FilePath;
+import hudson.model.ItemGroup;
 import hudson.model.Result;
 import hudson.model.Run;
 import hudson.model.TaskListener;
@@ -48,6 +49,8 @@
 import jenkins.scm.api.SCMRevision;
 import jenkins.scm.api.SCMRevisionAction;
 import jenkins.scm.api.SCMSource;
+import jenkins.scm.api.SCMSourceOwner;
+import jenkins.scm.impl.NullSCMSource;
 import org.apache.commons.lang.StringUtils;
 import org.jenkinsci.plugins.displayurlapi.DisplayURLProvider;
 
@@ -105,8 +108,8 @@ private static void createStatus(@NonNull Run<?, ?> build, @NonNull TaskListener
         @NonNull BitbucketApi bitbucket, @NonNull String key, @NonNull String hash)
             throws IOException, InterruptedException {
 
-        final SCMSource s = SCMSource.SourceByItem.findSource(build.getParent());
-        if (!(s instanceof BitbucketSCMSource)) {
+        final BitbucketSCMSource source = findBitbucketSCMSource(build);
+        if (source == null) {
             return;
         }
 
@@ -135,7 +138,6 @@ private static void createStatus(@NonNull Run<?, ?> build, @NonNull TaskListener
         } else if (Result.UNSTABLE.equals(result)) {
             statusDescription = StringUtils.defaultIfBlank(buildDescription, "This commit has test failures.");
 
-            BitbucketSCMSource source = (BitbucketSCMSource) s;
             BitbucketSCMSourceContext sourceContext = new BitbucketSCMSourceContext(null, SCMHeadObserver.none())
                     .withTraits(source.getTraits());
             if (sourceContext.sendSuccessNotificationForUnstableBuild()) {
@@ -160,12 +162,19 @@ private static void createStatus(@NonNull Run<?, ?> build, @NonNull TaskListener
         status = new BitbucketBuildStatus(hash, statusDescription, state, url, key, name);
         new BitbucketChangesetCommentNotifier(bitbucket).buildStatus(status);
         if (result != null) {
-            listener.getLogger().println("[Bitbucket] Build result notified");
+            listener.getLogger().println("[Bitbucket] Build result notified: " + status.getState());
         }
     }
 
     private static @CheckForNull BitbucketSCMSource findBitbucketSCMSource(Run<?, ?> build) {
         SCMSource s = SCMSource.SourceByItem.findSource(build.getParent());
+        if (s instanceof NullSCMSource) {
+            // for instance PR merged on Bitbucket since the build has been started
+            ItemGroup<?> grandFather = build.getParent().getParent();
+            if (grandFather instanceof SCMSourceOwner) {
+                s = ((SCMSourceOwner) grandFather).getSCMSources().get(0);
+            }
+        }
         return s instanceof BitbucketSCMSource ? (BitbucketSCMSource) s : null;
     }