Support for merge_commit_sha

src/main/java/org/kohsuke/github/GHPullRequest.java

@@ -50,6 +50,7 @@ public class GHPullRequest extends GHIssue {
     private int deletions;
     private String mergeable_state;
     private int changed_files;
+    private String merge_commit_sha;
 
     /**
      * GitHub doesn't return some properties of {@link GHIssue} when requesting the GET on the 'pulls' API
@@ -142,9 +143,9 @@ public PullRequest getPullRequest() {
     }
 
     //
-// details that are only available via get with ID
-//
-//
+    // details that are only available via get with ID
+    //
+
     public GHUser getMergedBy() throws IOException {
         populate();
         return merged_by;
@@ -185,6 +186,14 @@ public int getChangedFiles() throws IOException {
         return changed_files;
     }
 
+    /**
+     * See <a href="https://developer.github.com/changes/2013-04-25-deprecating-merge-commit-sha">GitHub blog post</a>
+     */
+    public String getMergeCommitSha() throws IOException {
+        populate();
+        return merge_commit_sha;
+    }
+
     /**
      * Fully populate the data by retrieving missing data.
      *

src/test/java/org/kohsuke/github/PullRequestTest.java

@@ -49,6 +49,15 @@ public void testPullRequestReviewComments() throws Exception {
         assertTrue(comments.isEmpty());
     }
 
+    @Test
+    public void testMergeCommitSHA() throws Exception {
+        String name = rnd.next();
+        GHPullRequest p = getRepository().createPullRequest(name, "stable", "master", "## test");
+        GHPullRequest updated = getRepository().getPullRequest(p.getNumber());
+        GHCommit commit = getRepository().getCommit(updated.getMergeCommitSha());
+        assertNotNull(commit);
+    }
+
     @Test
     // Requires push access to the test repo to pass
     public void setLabels() throws Exception {