heroku-apps/lib/git.js

'use strict';

let exec = require('child_process').execFile;
let fs = require('fs');

module.exports = function (context) {
  let sshGitUrl = app => `git@${context.gitHost}:${app}.git`;
  let gitUrl = app => `https://${context.httpGitHost}/${app}.git`;

  function git(args) {
    return new Promise(function (resolve, reject) {
      exec('git', args, function (error, stdout, stderr) {
        process.stderr.write(stderr);
        if (error) return reject(error);
        resolve(stdout);
      });
    });
  }

  function hasGitRemote(remote) {
    return git(['remote']).then(remotes => remotes.split('\n')).then(remotes => remotes.find(r => r === remote));
  }

  function createRemote(remote, url) {
    return hasGitRemote(remote).then(exists => !exists ? git(['remote', 'add', remote, url]) : null);
  }

  function listRemotes() {
    return git(['remote', '-v']).then(remotes => remotes.trim().split('\n').map(r => r.split(/\s/)));
  }

  function inGitRepo() {
    try {
      fs.lstatSync('.git');
      return true;
    } catch (err) {
      if (err.code !== 'ENOENT') throw err;
    }
  }

  function rmRemote(remote) {
    return git(['remote', 'rm', remote]);
  }

  return {
    sshGitUrl,
    gitUrl,
    createRemote,
    listRemotes,
    rmRemote,
    inGitRepo
  };
};