Pull-Request-Squash-Commit (#1245)

Octokit.Tests.Integration/Clients/PullRequestsClientTests.cs

@@ -225,6 +225,24 @@ public class PullRequestsClientTests : IDisposable
     }
 
     [IntegrationTest]
+    public async Task CanBeMergedWithSquashCommit()
+    {
+        await CreateTheWorld();
+
+        var newPullRequest = new NewPullRequest("squash commit pull request", branchName, "master");
+        var pullRequest = await _fixture.Create(Helper.UserName, _context.RepositoryName, newPullRequest);
+
+        var merge = new MergePullRequest { CommitMessage = "fake commit message", CommitTitle = "fake title", Squash = true };
+        var result = await _fixture.Merge(Helper.UserName, _context.RepositoryName, pullRequest.Number, merge);
+        var commit = await _github.Repository.Commit.Get(_context.RepositoryOwner, _context.RepositoryName, result.Sha);
+        var message = commit.Commit.Message;
+        Assert.True(result.Merged);
+        Assert.Equal("fake title\n\nfake commit message", commit.Commit.Message);
+
+    }
+
+    [IntegrationTest]
+
     public async Task CannotBeMergedDueMismatchConflict()
     {
         await CreateTheWorld();

Octokit.Tests/Clients/PullRequestsClientTests.cs

@@ -145,7 +145,7 @@ namespace Octokit.Tests.Clients
                 client.Merge("fake", "repo", 42, mergePullRequest);
 
                 connection.Received().Put<PullRequestMerge>(Arg.Is<Uri>(u => u.ToString() == "repos/fake/repo/pulls/42/merge"),
-                    mergePullRequest);
+                    mergePullRequest,null, "application/vnd.github.polaris-preview+json");
             }
 
             [Fact]

Octokit/Clients/PullRequestsClient.cs

@@ -119,7 +119,8 @@ namespace Octokit
             try
             {
                 var endpoint = ApiUrls.MergePullRequest(owner, name, number);
-                return await ApiConnection.Put<PullRequestMerge>(endpoint, mergePullRequest).ConfigureAwait(false);
+                return await ApiConnection.Put<PullRequestMerge>(endpoint, mergePullRequest,null, 
+                    AcceptHeaders.SquashCommitPreview).ConfigureAwait(false);
             }
             catch (ApiException ex)
             {

Octokit/Helpers/AcceptHeaders.cs

@@ -17,5 +17,7 @@
         public const string IssueLockingUnlockingApiPreview = "application/vnd.github.the-key-preview+json";
 
         public const string CommitReferenceSha1Preview = "application/vnd.github.chitauri-preview+sha";
+
+        public const string SquashCommitPreview = "application/vnd.github.polaris-preview+json";
     }
 }

Octokit/Models/Request/MergePullRequest.cs

@@ -22,11 +22,21 @@ namespace Octokit
         /// </summary>
         public string Sha { get; set; }
 
+        /// <summary>
+        /// The Title for the automatic commit message (optional)
+        /// </summary>
+        public string CommitTitle { get; set; }
+
+        /// <summary>
+        ///  Commit a single commit to the head branch (optional)
+        /// </summary>
+        public bool Squash { get; set; }
+
         internal string DebuggerDisplay
         {
             get
             {
-                return string.Format(CultureInfo.InvariantCulture, "Message: '{0}', Sha: '{1}'", CommitMessage, Sha);
+                return string.Format(CultureInfo.InvariantCulture, "Title: '{0}'  Message: '{1}', Sha: '{2}' , Squash: '{3}'", CommitTitle, CommitMessage, Sha, Squash);
             }
         }
     }