protected ScmResult executeBranchCommand()

in maven-scm-providers/maven-scm-provider-hg/src/main/java/org/apache/maven/scm/provider/hg/command/branch/HgBranchCommand.java [60:139]
54 lines of code
10 McCabe index (conditional complexity)

    protected ScmResult executeBranchCommand(
            ScmProviderRepository scmProviderRepository,
            ScmFileSet fileSet,
            String branch,
            ScmBranchParameters scmBranchParameters)
            throws ScmException {

        if (StringUtils.isBlank(branch)) {
            throw new ScmException("branch must be specified");
        }

        if (!fileSet.getFileList().isEmpty()) {
            throw new ScmException("This provider doesn't support branchging subsets of a directory");
        }

        File workingDir = fileSet.getBasedir();

        // build the command
        String[] branchCmd = new String[] {HgCommandConstants.BRANCH_CMD, branch};

        // keep the command about in string form for reporting
        HgConsumer branchConsumer = new HgConsumer() {
            public void doConsume(ScmFileStatus status, String trimmedLine) {
                // noop
            }
        };

        ScmResult result = HgUtils.execute(branchConsumer, workingDir, branchCmd);
        HgScmProviderRepository repository = (HgScmProviderRepository) scmProviderRepository;

        if (!result.isSuccess()) {
            throw new ScmException("Error while executing command " + joinCmd(branchCmd));
        }

        // First commit.
        String[] commitCmd = new String[] {
            HgCommandConstants.COMMIT_CMD, HgCommandConstants.MESSAGE_OPTION, scmBranchParameters.getMessage()
        };

        result = HgUtils.execute(new HgConsumer(), workingDir, commitCmd);

        if (!result.isSuccess()) {
            throw new ScmException("Error while executing command " + joinCmd(commitCmd));
        }

        // now push, if we should.

        if (repository.isPushChanges()) {
            if (!repository.getURI().equals(fileSet.getBasedir().getAbsolutePath())) {

                String[] pushCmd = new String[] {
                    HgCommandConstants.PUSH_CMD, HgCommandConstants.NEW_BRANCH_OPTION, repository.getURI()
                };

                result = HgUtils.execute(new HgConsumer(), fileSet.getBasedir(), pushCmd);

                if (!result.isSuccess()) {
                    throw new ScmException("Error while executing command " + joinCmd(pushCmd));
                }
            }
        }

        // do an inventory to return the files branched (all of them)
        String[] listCmd = new String[] {HgCommandConstants.INVENTORY_CMD};
        HgListConsumer listconsumer = new HgListConsumer();

        result = HgUtils.execute(listconsumer, fileSet.getBasedir(), listCmd);

        if (!result.isSuccess()) {
            throw new ScmException("Error while executing command " + joinCmd(listCmd));
        }

        List<ScmFile> files = listconsumer.getFiles();
        List<ScmFile> fileList = new ArrayList<>();
        for (ScmFile f : files) {
            fileList.add(new ScmFile(f.getPath(), ScmFileStatus.TAGGED));
        }

        return new BranchScmResult(fileList, result);
    }