Rebase interactive should finish if last step is edit

When the last step was an edit step, rebase interactive did not finish
after continuing the rebase. Instead, it returned with the status
FAST_FORWARD.

Change-Id: Ib19857474ac089dfeaae665ad5e95c66c21099b0

org.eclipse.jgit.test/tst/org/eclipse/jgit/api/RebaseCommandTest.java

@@ -2294,6 +2294,39 @@ public class RebaseCommandTest extends RepositoryTestCase {
 				}).call();
 	}
 
+	@Test
+	public void testRebaseEndsIfLastStepIsEdit() throws Exception {
+		// create file1 on master
+		writeTrashFile(FILE1, FILE1);
+		git.add().addFilepattern(FILE1).call();
+		git.commit().setMessage("Add file1\nnew line").call();
+		assertTrue(new File(db.getWorkTree(), FILE1).exists());
+
+		// create file2 on master
+		writeTrashFile("file2", "file2");
+		git.add().addFilepattern("file2").call();
+		git.commit().setMessage("Add file2\nnew line").call();
+		assertTrue(new File(db.getWorkTree(), "file2").exists());
+
+		git.rebase().setUpstream("HEAD~1")
+				.runInteractively(new InteractiveHandler() {
+
+					public void prepareSteps(List<RebaseTodoLine> steps) {
+						steps.get(0).setAction(Action.EDIT);
+					}
+
+					public String modifyCommitMessage(String commit) {
+						return commit;
+					}
+				}).call();
+		git.commit().setAmend(true)
+				.setMessage("Add file2\nnew line\nanother line").call();
+		RebaseResult result = git.rebase().setOperation(Operation.CONTINUE)
+				.call();
+		assertEquals(Status.OK, result.getStatus());
+
+	}
+
 	private File getTodoFile() {
 		File todoFile = new File(db.getDirectory(), GIT_REBASE_TODO);
 		return todoFile;

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

@@ -284,6 +284,9 @@ public class RebaseCommand extends GitCommand<RebaseResult> {
 
 			List<RebaseTodoLine> steps = repo.readRebaseTodo(
 					rebaseState.getPath(GIT_REBASE_TODO), false);
+			if (steps.size() == 0) {
+				return finishRebase(walk.parseCommit(repo.resolve(Constants.HEAD)), false);
+			}
 			if (isInteractive()) {
 				interactiveHandler.prepareSteps(steps);
 				repo.writeRebaseTodoFile(rebaseState.getPath(GIT_REBASE_TODO),
@@ -370,15 +373,7 @@ public class RebaseCommand extends GitCommand<RebaseResult> {
 					monitor.endTask();
 				}
 			}
-			if (newHead != null) {
-				String headName = rebaseState.readFile(HEAD_NAME);
-				updateHead(headName, newHead, upstreamCommit);
-				FileUtils.delete(rebaseState.getDir(), FileUtils.RECURSIVE);
-				if (lastStepWasForward)
-					return RebaseResult.FAST_FORWARD_RESULT;
-				return RebaseResult.OK_RESULT;
-			}
-			return RebaseResult.FAST_FORWARD_RESULT;
+			return finishRebase(newHead, lastStepWasForward);
 		} catch (CheckoutConflictException cce) {
 			return new RebaseResult(cce.getConflictingPaths());
 		} catch (IOException ioe) {
@@ -386,6 +381,16 @@ public class RebaseCommand extends GitCommand<RebaseResult> {
 		}
 	}
 
+	private RebaseResult finishRebase(RevCommit newHead,
+			boolean lastStepWasForward) throws IOException {
+		String headName = rebaseState.readFile(HEAD_NAME);
+		updateHead(headName, newHead, upstreamCommit);
+		FileUtils.delete(rebaseState.getDir(), FileUtils.RECURSIVE);
+		if (lastStepWasForward || newHead == null)
+			return RebaseResult.FAST_FORWARD_RESULT;
+		return RebaseResult.OK_RESULT;
+	}
+
 	private void checkSteps(List<RebaseTodoLine> steps)
 			throws InvalidRebaseStepException, IOException {
 		if (steps.isEmpty())