Enable support for Jenkins pipelines

Pipelines don't use AbstractProject and AbstractBuild. Instead, they use
WorkflowJob and WorkflowRun. The common ancestors are Job and Run.

Implement the code in terms of Job and Run.

In some cases, Job doesn't provide the needed API. However, both
AbstractProject and WorkflowJob implement ParameterizedJob interface,
which provides the required functionality.

Require the job to implement ParameterizedJob.

Original patch by Robert Hencke <[email protected]>

Author: rhencke

src/main/java/stashpullrequestbuilder/stashpullrequestbuilder/StashBuildTrigger.java

@@ -10,10 +10,11 @@
 import com.cloudbees.plugins.credentials.domains.URIRequirementBuilder;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import hudson.Extension;
-import hudson.model.AbstractProject;
 import hudson.model.Build;
 import hudson.model.Cause;
+import hudson.model.CauseAction;
 import hudson.model.Item;
+import hudson.model.Job;
 import hudson.model.ParameterDefinition;
 import hudson.model.ParameterValue;
 import hudson.model.ParametersAction;
@@ -37,6 +38,8 @@
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import jenkins.model.Jenkins;
+import jenkins.model.ParameterizedJobMixIn;
+import jenkins.model.ParameterizedJobMixIn.ParameterizedJob;
 import net.sf.json.JSONObject;
 import org.apache.commons.lang.StringUtils;
 import org.kohsuke.stapler.AncestorInPath;
@@ -47,7 +50,7 @@
 
 /** Created by Nathan McCarthy */
 @SuppressFBWarnings({"WMI_WRONG_MAP_ITERATOR", "NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE"})
-public class StashBuildTrigger extends Trigger<AbstractProject<?, ?>> {
+public class StashBuildTrigger extends Trigger<Job<?, ?>> {
   private static final Logger logger =
       Logger.getLogger(MethodHandles.lookup().lookupClass().getName());
   private final String projectPath;
@@ -142,7 +145,7 @@ private StandardUsernamePasswordCredentials getCredentials() {
         CredentialsProvider.lookupCredentials(
             StandardUsernamePasswordCredentials.class,
             this.job,
-            Tasks.getDefaultAuthenticationOf(this.job),
+            Tasks.getDefaultAuthenticationOf((ParameterizedJob) job),
             URIRequirementBuilder.fromUri(stashHost).build()),
         CredentialsMatchers.allOf(CredentialsMatchers.withId(credentialsId)));
   }
@@ -196,15 +199,15 @@ public boolean isCancelOutdatedJobsEnabled() {
   }
 
   @Override
-  public void start(AbstractProject<?, ?> project, boolean newInstance) {
+  public void start(Job<?, ?> job, boolean newInstance) {
     try {
-      Objects.requireNonNull(project, "project is null");
-      this.stashPullRequestsBuilder = new StashPullRequestsBuilder(project, this);
+      Objects.requireNonNull(job, "job is null");
+      this.stashPullRequestsBuilder = new StashPullRequestsBuilder(job, this);
     } catch (NullPointerException e) {
       logger.log(Level.SEVERE, "Can't start trigger", e);
       return;
     }
-    super.start(project, newInstance);
+    super.start(job, newInstance);
   }
 
   public StashPullRequestsBuilder getBuilder() {
@@ -226,7 +229,19 @@ public QueueTaskFuture<?> startJob(StashCause cause) {
       abortRunningJobsThatMatch(cause);
     }
 
-    return job.scheduleBuild2(job.getQuietPeriod(), cause, new ParametersAction(values));
+    // TODO: Use ParameterizedJob#getParameterizedJobMixIn() in Jenkins 2.61+
+    ParameterizedJobMixIn<?, ?> scheduledJob =
+        new ParameterizedJobMixIn() {
+          @Override
+          protected Job<?, ?> asJob() {
+            return StashBuildTrigger.this.job;
+          }
+        };
+
+    return scheduledJob.scheduleBuild2(
+        ((ParameterizedJob) job).getQuietPeriod(),
+        new CauseAction(cause),
+        new ParametersAction(values));
   }
 
   private void cancelPreviousJobsInQueueThatMatch(@Nonnull StashCause stashCause) {
@@ -333,7 +348,7 @@ public StashBuildTriggerDescriptor() {
 
     @Override
     public boolean isApplicable(Item item) {
-      return item instanceof AbstractProject;
+      return item instanceof Job && item instanceof ParameterizedJob;
     }
 
     @Override