Fix the reflog prefix for cherry-pick, revert and merge commands

We should see whether the commit was a regular commit or something
else.

Change-Id: I82d8300cf3c53cb2bdcb6495386aadb803e0c6f7
Signed-off-by: Robin Rosenberg <robin.rosenberg@dewire.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/api/CherryPickCommand.java

@@ -133,7 +133,6 @@ public class CherryPickCommand extends GitCommand<CherryPickResult> {
 						.newMerger(repo);
 				merger.setWorkingTreeIterator(new FileTreeIterator(repo));
 				merger.setBase(srcParent.getTree());
-
 				if (merger.merge(headCommit, srcCommit)) {
 					if (AnyObjectId.equals(headCommit.getTree().getId(), merger
 							.getResultTreeId()))
@@ -145,6 +144,9 @@ public class CherryPickCommand extends GitCommand<CherryPickResult> {
 					dco.checkout();
 					newHead = new Git(getRepository()).commit()
 							.setMessage(srcCommit.getFullMessage())
+							.setReflogComment(
+									"cherry-pick: "
+											+ srcCommit.getShortMessage())
 							.setAuthor(srcCommit.getAuthorIdent()).call();
 					cherryPickedRefs.add(src);
 				} else {

org.eclipse.jgit/src/org/eclipse/jgit/api/CommitCommand.java

@@ -114,6 +114,8 @@ public class CommitCommand extends GitCommand<RevCommit> {
 	 */
 	private List<ObjectId> parents = new LinkedList<ObjectId>();
 
+	private String reflogComment;
+
 	/**
 	 * @param repo
 	 */
@@ -218,10 +220,14 @@ public class CommitCommand extends GitCommand<RevCommit> {
 						RevCommit revCommit = revWalk.parseCommit(commitId);
 						RefUpdate ru = repo.updateRef(Constants.HEAD);
 						ru.setNewObjectId(commitId);
-						String prefix = amend ? "commit (amend): " : "commit: ";
-						ru.setRefLogMessage(
-								prefix + revCommit.getShortMessage(), false);
-
+						if (reflogComment != null) {
+							ru.setRefLogMessage(reflogComment, false);
+						} else {
+							String prefix = amend ? "commit (amend): "
+									: "commit: ";
+							ru.setRefLogMessage(
+									prefix + revCommit.getShortMessage(), false);
+						}
 						ru.setExpectedOldObjectId(headId);
 						Result rc = ru.forceUpdate();
 						switch (rc) {
@@ -667,4 +673,15 @@ public class CommitCommand extends GitCommand<RevCommit> {
 		return this;
 	}
 
+	/**
+	 * Override the message written to the reflog
+	 *
+	 * @param reflogComment
+	 * @return {@code this}
+	 */
+	public CommitCommand setReflogComment(String reflogComment) {
+		this.reflogComment = reflogComment;
+		return this;
+	}
+
 }

org.eclipse.jgit/src/org/eclipse/jgit/api/MergeCommand.java

@@ -217,7 +217,9 @@ public class MergeCommand extends GitCommand<MergeResult> {
 							merger.getResultTreeId());
 					dco.setFailOnConflict(true);
 					dco.checkout();
-					RevCommit newHead = new Git(getRepository()).commit().call();
+
+					RevCommit newHead = new Git(getRepository()).commit()
+							.setReflogComment(refLogMessage.toString()).call();
 					return new MergeResult(newHead.getId(),
 							null, new ObjectId[] {
 									headCommit.getId(), srcCommit.getId() },

org.eclipse.jgit/src/org/eclipse/jgit/api/RevertCommand.java

@@ -146,12 +146,13 @@ public class RevertCommand extends GitCommand<RevCommit> {
 							merger.getResultTreeId());
 					dco.setFailOnConflict(true);
 					dco.checkout();
-					String newMessage = "Revert \""
-							+ srcCommit.getShortMessage() + "\"" + "\n\n"
+					String shortMessage = "Revert \"" + srcCommit.getShortMessage() + "\"";
+					String newMessage = shortMessage + "\n\n"
 							+ "This reverts commit "
 							+ srcCommit.getId().getName() + ".\n";
-					newHead = new Git(getRepository()).commit().setMessage(
-							newMessage).call();
+					newHead = new Git(getRepository()).commit()
+							.setMessage(newMessage)
+							.setReflogComment("revert: " + shortMessage).call();
 					revertedRefs.add(src);
 				} else {
 					return null;