feat: Better pull request messages

Author: twpol

Git/Project.cs

@@ -41,6 +41,15 @@ public string ParseRef(string reference)
             throw new ApplicationException("Unable to find ref");
         }
 
+        public string GetAbbreviatedCommit(string reference)
+        {
+            foreach (var line in GetCommandOutput($"log --format=%h -1 {reference}"))
+            {
+                return line;
+            }
+            throw new ApplicationException("Unable to find ref");
+        }
+
         public string Describe(string options)
         {
             foreach (var line in GetCommandOutput($"describe {options}"))

Program.cs

@@ -134,7 +134,12 @@ static async Task AsyncMain(IConfigurationRoot config)
                 var newMergeBranchMessage = String.Format(gitHubConfig["mergeMessageFormat"],
                     baseBranchVersion,
                     autoMergePullRequestsSuccess.Count,
-                    String.Join("", autoMergePullRequestsSuccess.Select(pr => String.Format(gitHubConfig["mergeMessagePRFormat"], pr.Number, pr.Title)))
+                    String.Join("", autoMergePullRequestsSuccess.Select(pr => String.Format(
+                        gitHubConfig["mergeMessagePRFormat"],
+                        pr.Number,
+                        pr.Title,
+                        git.GetAbbreviatedCommit($"pull/{pr.Number}/head")
+                    )))
                 );
                 var newMergeBranchCommit = git.CommitTree($"{autoMergeCommit}^{{tree}}", mergeBranchParents, newMergeBranchMessage);
                 git.SetBranchRef(gitHubConfig["mergeBranch"], newMergeBranchCommit);