Support for Team Foundation Server merge messages

src/GitVersionCore.Tests/VersionCalculation/Strategies/MergeMessageBaseVersionStrategyTests.cs

@@ -46,6 +46,8 @@ public void ShouldNotAllowIncrementOfVersion()
         [TestCase("Merge branch 'Release-v0.2.0'", true, "0.2.0")]
         [TestCase("Merge branch 'Release-v2.2'", true, "2.2.0")]
         [TestCase("Merge remote-tracking branch 'origin/release/0.8.0' into develop/master", true, "0.8.0")]
+        [TestCase("Merge release/5.1.0 to master", true, "5.1.0")] // Team Foundation Server 2017 default merge message (en-US)
+        [TestCase("Zusammengeführter PR \"9\": release/5.1.0 mit master mergen", true, "5.1.0")] // Team Foundation Server 2017 default merge message (de-DE)
         [TestCase("Merge remote-tracking branch 'refs/remotes/origin/release/2.0.0'", true, "2.0.0")]
         public void TakesVersionFromMergeOfReleaseBranch(string message, bool isMergeCommit, string expectedVersion)
         {

src/GitVersionCore/MergeMessage.cs

@@ -20,6 +20,13 @@ class MergeMessage
         static Regex parseRemoteTrackingMergeMessage = new Regex(
             @"^Merge remote-tracking branch '(?<SourceBranch>.*)'( into (?<TargetBranch>.*))?",
             RegexOptions.IgnoreCase | RegexOptions.Compiled);
+        static Regex parseTfsMergeMessageEnglishUS = new Regex(
+            @"^Merge (?<SourceBranch>.*) to (?<TargetBranch>.*)",
+            RegexOptions.IgnoreCase | RegexOptions.Compiled);
+        // Zusammengeführter PR \"9\": release/5.0.1 mit master mergen
+        static Regex parseTfsMergeMessageGermanDE = new Regex(
+            @"^Zusammengeführter PR ""(?<PullRequestNumber>\d*)""\: (?<SourceBranch>.*) mit (?<TargetBranch>.*) mergen",
+            RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
         private string mergeMessage;
 
@@ -86,12 +93,29 @@ private string ParseBranch()
             }
 
             match = parseRemoteTrackingMergeMessage.Match(mergeMessage);
-            if (match.Success) {
+            if (match.Success)
+            {
                 var from = match.Groups["SourceBranch"].Value;
                 // TODO We could remove/separate the remote name at this point?
                 return from;
             }
 
+            match = parseTfsMergeMessageEnglishUS.Match(mergeMessage);
+            if (match.Success)
+            {
+                IsMergedPullRequest = true;
+                var from = match.Groups["SourceBranch"].Value;
+                return from;
+            }
+
+            match = parseTfsMergeMessageGermanDE.Match(mergeMessage);
+            if (match.Success)
+            {
+                IsMergedPullRequest = true;
+                var from = match.Groups["SourceBranch"].Value;
+                return from;
+            }
+
             return "";
         }