StashBuilds: Add pipeline support

Implement in terms of Job and Run. Customized comments are not available
in pipelines.

Author: proski

src/main/java/stashpullrequestbuilder/stashpullrequestbuilder/StashBuilds.java

@@ -1,8 +1,10 @@
 package stashpullrequestbuilder.stashpullrequestbuilder;
 
 import hudson.Util;
-import hudson.model.AbstractBuild;
+import hudson.model.AbstractProject;
+import hudson.model.Job;
 import hudson.model.Result;
+import hudson.model.Run;
 import hudson.model.TaskListener;
 import java.io.IOException;
 import java.lang.invoke.MethodHandles;
@@ -22,40 +24,45 @@ public StashBuilds(StashBuildTrigger trigger, StashRepository repository) {
     this.repository = repository;
   }
 
-  public void onStarted(AbstractBuild<?, ?> build) {
-    StashCause cause = build.getCause(StashCause.class);
+  public void onStarted(Run<?, ?> run) {
+    StashCause cause = run.getCause(StashCause.class);
     if (cause == null) {
       return;
     }
     try {
-      build.setDescription(cause.getShortDescription());
+      run.setDescription(cause.getShortDescription());
     } catch (IOException e) {
       logger.log(Level.SEVERE, "Can't update build description", e);
     }
   }
 
-  public void onCompleted(AbstractBuild<?, ?> build, TaskListener listener) {
-    StashCause cause = build.getCause(StashCause.class);
+  public void onCompleted(Run<?, ?> run, TaskListener listener) {
+    StashCause cause = run.getCause(StashCause.class);
     if (cause == null) {
       return;
     }
-    Result result = build.getResult();
+    Result result = run.getResult();
     // Note: current code should no longer use "new JenkinsLocationConfiguration()"
     // as only one instance per runtime is really supported by the current core.
     JenkinsLocationConfiguration globalConfig = JenkinsLocationConfiguration.get();
     String rootUrl = globalConfig == null ? null : globalConfig.getUrl();
     String buildUrl = "";
     if (rootUrl == null) {
-      buildUrl = " PLEASE SET JENKINS ROOT URL FROM GLOBAL CONFIGURATION " + build.getUrl();
+      buildUrl = " PLEASE SET JENKINS ROOT URL FROM GLOBAL CONFIGURATION " + run.getUrl();
     } else {
-      buildUrl = rootUrl + build.getUrl();
+      buildUrl = rootUrl + run.getUrl();
     }
     repository.deletePullRequestComment(cause.getPullRequestId(), cause.getBuildStartCommentId());
 
     String additionalComment = "";
+    StashPostBuildComment comments = null;
+    Job<?, ?> job = run.getParent();
 
-    StashPostBuildComment comments =
-        build.getProject().getPublishersList().get(StashPostBuildComment.class);
+    // Post-build actions are not supported in pipelines. Need a different
+    // approach to let pipelines publish build results.
+    if (job instanceof AbstractProject<?, ?>) {
+      comments = ((AbstractProject<?, ?>) job).getPublishersList().get(StashPostBuildComment.class);
+    }
 
     if (comments != null) {
       String buildComment =
@@ -66,28 +73,27 @@ public void onCompleted(AbstractBuild<?, ?> build, TaskListener listener) {
       if (buildComment != null && !buildComment.isEmpty()) {
         String expandedComment;
         try {
-          expandedComment =
-              Util.fixEmptyAndTrim(build.getEnvironment(listener).expand(buildComment));
+          expandedComment = Util.fixEmptyAndTrim(run.getEnvironment(listener).expand(buildComment));
         } catch (IOException | InterruptedException e) {
           expandedComment = "Exception while expanding '" + buildComment + "': " + e;
         }
 
         additionalComment = "\n\n" + expandedComment;
       }
     }
-    String duration = build.getDurationString();
+    String duration = run.getDurationString();
     repository.postFinishedComment(
         cause.getPullRequestId(),
         cause.getSourceCommitHash(),
         cause.getDestinationCommitHash(),
         result,
         buildUrl,
-        build.getNumber(),
+        run.getNumber(),
         additionalComment,
         duration);
 
     // Merge PR
-    if (trigger.getMergeOnSuccess() && build.getResult() == Result.SUCCESS) {
+    if (trigger.getMergeOnSuccess() && run.getResult() == Result.SUCCESS) {
       boolean mergeStat =
           repository.mergePullRequest(cause.getPullRequestId(), cause.getPullRequestVersion());
       if (mergeStat == true) {