commands.js

const { mkdirSync, existsSync } = require('fs');
const { which, exec, cd, ls } = require('shelljs');
const { argv } = require('yargs');

const { WORKSPACE_PATH, BRANCH, VERSION } = require('./config');

const SHELL_OPTIONS = { silent: true };

const COMMANDS = { rollback: 'rollback' };

const DEFAULT_COMMAND = 'deploy';

const [COMMAND] = argv._;

const OPTIONS = {
  COMMAND: COMMANDS[COMMAND] || DEFAULT_COMMAND,
  SHOW_HELP: !!argv.h,
  SHOW_VERSION: !!argv.v,
  WORKSPACE: argv.w || argv.workspace,
  SFTP_HOSTNAME: argv.H || argv.hostname,
  SFTP_USER: argv.u || argv.user,
  SFTP_PASSWORD: argv.p || argv.password,
  SFTP_PORT: argv.port,
  SFTP_DEST: argv.d || argv.dest,
  GIT_REPOSITORY: argv.r || argv.repository,
  BRANCH: argv.b || argv.branch,
};

const SELECTED_BRANCH = OPTIONS.BRANCH || BRANCH;

const trimOutput = stdout => stdout.trim();
const splitLines = output => output.split('\n');
const getNameStatus = output => {
  const [status, ...fileNameArray] = output.split(/\t/);
  return { status: status.toUpperCase(), file: fileNameArray.join(' ').trim() };
};

const run = command =>
  new Promise((resolve, reject) => {
    exec(command, SHELL_OPTIONS, (code, stdout, stderr) =>
      code === 0 ? resolve(stdout) : reject({ code, error: stderr }),
    );
  });

const checkGit = () => {
  if (!which('git')) throw new Error('Git Not found');
};

const createWorkspace = () => {
  if (!existsSync(WORKSPACE_PATH)) mkdirSync(WORKSPACE_PATH);
};

const goToWorkspaceFolder = () => cd(WORKSPACE_PATH);

const goToProjectFolder = project => cd(`${WORKSPACE_PATH}/${project}`);

const updateRepository = () => run('git pull').then(trimOutput);

const getEmptyTreeHash = () =>
  run("printf '' | git hash-object -t tree --stdin").then(trimOutput);

const getCommits = () =>
  run('git log --oneline')
    .then(trimOutput)
    .then(splitLines);

const getChangedFiles = ({ startHash, endHash }) =>
  run(`git diff --name-status ${startHash} ${endHash}`)
    .then(trimOutput)
    .then(splitLines)
    .then(lines => lines.map(getNameStatus));

const cloneToWorkspace = (repository, name = '') => {
  goToWorkspaceFolder();
  return run(
    `git clone ${repository} -b ${SELECTED_BRANCH} --single-branch ${name}`.trim(),
  ).then(() => name || repository.match(/^.+\/(.+).git$/)[1]);
};

const listWorkspaces = () => ls(WORKSPACE_PATH);

const checkout = (hash = SELECTED_BRANCH) =>
  run(`git checkout ${hash}`).then(trimOutput);

const help = () => {
  console.log(`
  CLI tool for deploying code from a Git repository via SFTP in a controlled way

  usage:
    git2sftp [options]
  
  options:
    -w, --workspace     Select Workspace
    -H, --hostname      SFTP Hostname
    -u, --user          SFTP User
    -p, --password      SFTP Password
    --port              SFTP Port (Default: 22)
    -d, --dest          SFTP Remote Destiny
    -r, --repository    Git repository
    -b, --branch        Git branch (Default: master)
    -h                  Show Help
    -v                  Show Version
    `);
  process.exit(0);
};

const version = () => {
  console.log(`
git2sftp -> ${VERSION}
`);
  process.exit(0);
};

module.exports = {
  OPTIONS,
  COMMANDS,
  help,
  version,
  checkGit,
  createWorkspace,
  cloneToWorkspace,
  goToProjectFolder,
  updateRepository,
  getEmptyTreeHash,
  getCommits,
  getChangedFiles,
  listWorkspaces,
  checkout,
};