public RebaseResult call()

in org.eclipse.jgit/src/org/eclipse/jgit/api/RebaseCommand.java [248:364]
106 lines of code
29 McCabe index (conditional complexity)

	public RebaseResult call() throws GitAPIException, NoHeadException,
			RefNotFoundException, WrongRepositoryStateException {
		newHead = null;
		lastStepWasForward = false;
		checkCallable();
		checkParameters();
		commitConfig = repo.getConfig().get(CommitConfig.KEY);
		try {
			switch (operation) {
			case ABORT:
				try {
					return abort(RebaseResult.ABORTED_RESULT);
				} catch (IOException ioe) {
					throw new JGitInternalException(ioe.getMessage(), ioe);
				}
			case PROCESS_STEPS:
			case SKIP:
			case CONTINUE:
				String upstreamCommitId = rebaseState.readFile(ONTO);
				try {
					upstreamCommitName = rebaseState.readFile(ONTO_NAME);
				} catch (FileNotFoundException e) {
					// Fall back to commit ID if file doesn't exist (e.g. rebase
					// was started by C Git)
					upstreamCommitName = upstreamCommitId;
				}
				this.upstreamCommit = walk.parseCommit(repo
						.resolve(upstreamCommitId));
				preserveMerges = rebaseState.getRewrittenDir().isDirectory();
				break;
			case BEGIN:
				autoStash();
				if (stopAfterInitialization
						|| !walk.isMergedInto(
								walk.parseCommit(repo.resolve(Constants.HEAD)),
								upstreamCommit)) {
					org.eclipse.jgit.api.Status status = Git.wrap(repo)
							.status().setIgnoreSubmodules(IgnoreSubmoduleMode.ALL).call();
					if (status.hasUncommittedChanges()) {
						List<String> list = new ArrayList<>();
						list.addAll(status.getUncommittedChanges());
						return RebaseResult.uncommittedChanges(list);
					}
				}
				RebaseResult res = initFilesAndRewind();
				if (stopAfterInitialization)
					return RebaseResult.INTERACTIVE_PREPARED_RESULT;
				if (res != null) {
					autoStashApply();
					if (rebaseState.getDir().exists())
						FileUtils.delete(rebaseState.getDir(),
								FileUtils.RECURSIVE);
					return res;
				}
			}

			if (monitor.isCancelled())
				return abort(RebaseResult.ABORTED_RESULT);

			if (operation == Operation.CONTINUE) {
				newHead = continueRebase();
				List<RebaseTodoLine> doneLines = repo.readRebaseTodo(
						rebaseState.getPath(DONE), true);
				RebaseTodoLine step = doneLines.get(doneLines.size() - 1);
				if (newHead != null
						&& step.getAction() != Action.PICK) {
					RebaseTodoLine newStep = new RebaseTodoLine(
							step.getAction(),
							AbbreviatedObjectId.fromObjectId(newHead),
							step.getShortMessage());
					RebaseResult result = processStep(newStep, false);
					if (result != null)
						return result;
				}
				File amendFile = rebaseState.getFile(AMEND);
				boolean amendExists = amendFile.exists();
				if (amendExists) {
					FileUtils.delete(amendFile);
				}
				if (newHead == null && !amendExists) {
					// continueRebase() returns null only if no commit was
					// neccessary. This means that no changes where left over
					// after resolving all conflicts. In this case, cgit stops
					// and displays a nice message to the user, telling him to
					// either do changes or skip the commit instead of continue.
					return RebaseResult.NOTHING_TO_COMMIT_RESULT;
				}
			}

			if (operation == Operation.SKIP)
				newHead = checkoutCurrentHead();

			List<RebaseTodoLine> steps = repo.readRebaseTodo(
					rebaseState.getPath(GIT_REBASE_TODO), false);
			if (steps.isEmpty()) {
				return finishRebase(walk.parseCommit(repo.resolve(Constants.HEAD)), false);
			}
			if (isInteractive()) {
				interactiveHandler.prepareSteps(steps);
				repo.writeRebaseTodoFile(rebaseState.getPath(GIT_REBASE_TODO),
						steps, false);
			}
			checkSteps(steps);
			for (RebaseTodoLine step : steps) {
				popSteps(1);
				RebaseResult result = processStep(step, true);
				if (result != null) {
					return result;
				}
			}
			return finishRebase(newHead, lastStepWasForward);
		} catch (CheckoutConflictException cce) {
			return RebaseResult.conflicts(cce.getConflictingPaths());
		} catch (IOException ioe) {
			throw new JGitInternalException(ioe.getMessage(), ioe);
		}
	}