protected CheckInScmResult executeCheckInCommand()

in maven-scm-providers/maven-scm-providers-git/maven-scm-provider-jgit/src/main/java/org/apache/maven/scm/provider/git/jgit/command/checkin/JGitCheckInCommand.java [76:151]
64 lines of code
13 McCabe index (conditional complexity)

    protected CheckInScmResult executeCheckInCommand(
            ScmProviderRepository repo, ScmFileSet fileSet, String message, ScmVersion version) throws ScmException {

        Git git = null;
        try {
            File basedir = fileSet.getBasedir();
            git = JGitUtils.openRepo(basedir);

            boolean doCommit = false;

            if (!fileSet.getFileList().isEmpty()) {
                // add files first
                doCommit = JGitUtils.addAllFiles(git, fileSet).size() > 0;
                if (!doCommit) {
                    doCommit = git.status().call().hasUncommittedChanges();
                }
            } else {
                // add all tracked files which are modified manually
                Status status = git.status().call();
                Set<String> changeds = git.status().call().getModified();
                if (changeds.isEmpty()) {
                    if (!status.hasUncommittedChanges()) {
                        // warn there is nothing to add
                        logger.warn("There are neither files to be added nor any uncommitted changes");
                        doCommit = false;
                    } else {
                        logger.debug("There are uncommitted changes in the git index");
                        doCommit = true;
                    }
                } else {
                    // TODO: gitexe only adds if fileSet is not empty
                    AddCommand add = git.add();
                    for (String changed : changeds) {
                        logger.debug("Add manually: {}", changed);
                        add.addFilepattern(changed);
                        doCommit = true;
                    }
                    add.call();
                }
            }

            List<ScmFile> checkedInFiles = Collections.emptyList();
            if (doCommit) {
                UserInfo author = getAuthor(repo, git);
                UserInfo committer = getCommitter(repo, git);

                CommitCommand command = git.commit().setMessage(message).setAuthor(author.name, author.email);
                command.setCommitter(committer.name, committer.email);
                RevCommit commitRev = command.call();

                logger.info("commit done: " + commitRev.getShortMessage());
                checkedInFiles = JGitUtils.getFilesInCommit(git.getRepository(), commitRev, fileSet.getBasedir());
                if (logger.isDebugEnabled()) {
                    for (ScmFile scmFile : checkedInFiles) {
                        logger.debug("in commit: " + scmFile);
                    }
                }
            }

            if (repo.isPushChanges()) {
                String branch = version != null ? version.getName() : null;
                if (StringUtils.isBlank(branch)) {
                    branch = git.getRepository().getBranch();
                }
                RefSpec refSpec = new RefSpec(Constants.R_HEADS + branch + ":" + Constants.R_HEADS + branch);
                logger.info("push changes to remote... " + refSpec);
                JGitUtils.push(git, (GitScmProviderRepository) repo, refSpec);
            }

            return new CheckInScmResult("JGit checkin", checkedInFiles);
        } catch (Exception e) {
            throw new ScmException("JGit checkin failure!", e);
        } finally {
            JGitUtils.closeRepo(git);
        }
    }