gulpfile.js

var 
    gulp        = require("gulp"),
    sourcemaps  = require("gulp-sourcemaps"),
    babel       = require("gulp-babel"),
    mocha       = require('gulp-mocha'),
    jshint      = require('gulp-jshint'),
    pages       = require('gulp-gh-pages'),
    rimraf      = require('rimraf'),
    beautify    = require('gulp-jsbeautify'),
    shell       = require('gulp-shell'),
    changelog   = require('gulp-changelog'),
    config      = require('./config.json');

/** Backs up the files in case of emergency! */
gulp.task('backup', function () {
  return gulp
    .src('lib/**/**/*.js')
    .pipe(gulp.dest('./.backup'));
});

gulp.task('recover', function () {
  return gulp
    .src('./.backup/**/**/*.js')
    .pipe(gulp.dest('lib/'));
});

/* Formats the files */
gulp.task('beautify', ['backup'], function () {
  return gulp.src('./lib/**/**/*.js')
    .pipe(beautify(config.beautify))
    .pipe(gulp.dest('./lib'));
});

gulp.task("lib", ['beautify'], function () {
  return gulp.src('./lib/**/**/*.js')
    .pipe(jshint(config.jshint))
    .pipe(jshint.reporter('jshint-stylish'))
    .pipe(jshint.reporter('fail'))
    .pipe(sourcemaps.init())
    .pipe(babel())
    .pipe(sourcemaps.write("./source maps/"))
    .pipe(gulp.dest('src/'));
});

gulp.task('watch', function () {
    return gulp.watch('./lib/**/*.*', ['lib']);
});
gulp.task('test', ['lib'], function() {
  return gulp.src('./tests/**/**/*.js', {read: false})
        // gulp-mocha needs filepaths so you can't have any plugins before it
        .pipe(mocha());
});

/* 
 * Runs the doxx command and builds the docs 
* Install other themes here, generate docs for each.
*/
gulp.task('doc', ['build'], shell.task([
  (function(){
    var doc = 'node_modules/mr-doc/bin/mr-doc',
        cmd = {
          source: ' -s lib/',
          output: ' -o docs/',
          name:' -n "gengo.js/core/modules"',
          theme:' -t cayman'
        };
    return doc + cmd.source + cmd.output + cmd.name + cmd.theme;
  })()
]));

/*
 * Clean the docs themes folder
 */
gulp.task('clean:docs', ['gh-pages'], function (cb) {
  rimraf('./docs/', cb);
});

gulp.task('changelog', function(cb){
  changelog(require('./package.json')).then(function(stream){
    stream.pipe(gulp.dest('./')).on('end', cb);
  });
});

/*
 * Create the gh-pages branch - wont push automatically
 */
gulp.task('gh-pages', ['doc'], function () {
  return gulp.src('./docs/**/*')
    .pipe(pages());
});


gulp.task('clean:backup', ['gh-pages'], function (cb) {
  rimraf('.backup/', cb);
});

gulp.task("default", ['backup','lib','changelog','watch']);

gulp.task('build', ['backup','lib','changelog','test']);

gulp.task('docs', ['build', 'doc', 'gh-pages', 'clean:docs', 'clean:backup']);