pull-from-source/lib/index.js

Pulls the changes from the source repository in the forked one.

"use strict";

var spawn = require("spawno"),
    forkSource = require("gh-fork-source"),
    EventEmitter = require("events"),
    noop = require("noop6");

/**
 * pullFromSource
 * Pulls the changes from the source repository in the forked one.
 *
 * @name pullFromSource
 * @function
 * @param {String} path The path to the local git repository.
 * @param {Object} opts The options passed to [`gh-fork-source`](https://github.com/IonicaBiau/gh-fork-source).
 * @param {Function} cb The callback function.
 * @returns {EventEmitter} An event emitter emitting the following events:
 *
 *  - `progress` (String): The progress message.
 */
module.exports = function pullFromSource(path, opts, cb) {
    var ev = new EventEmitter();
    opts.branch = opts.branch || "master";
    ev.emit("progress", "Getting repository information.");
    forkSource(path, opts, function (err, sourceRepo) {
        if (err) {
            return cb(err);
        }

        ev.emit("progress", "Pulling from " + sourceRepo.git_url + ", " + opts.branch + " branch");
        opts.branch = opts.branch || sourceRepo.default_branch;
        spawn("git", ["pull", sourceRepo.git_url, opts.branch], {
            cwd: path
        }, function (err, stdout, stderr) {
            if (err) {
                return cb(err);
            }
            cb(null, stdout, stderr, sourceRepo);
        });
    });
    return ev;
};