gulpfile.js

'use strict';

var path = require('path'),
  gulp = require('gulp'),
  extend = require('extend'),
  karma = require('karma').server,
  karmaConfig = require('./karma.conf'),
  config = require('./build.conf.js'),
  plugins = require('gulp-load-plugins')();

var ciMode = false;

gulp.task('clean', function () {
  return gulp
    .src(config.buildFolder, {read: false})
    .pipe(plugins.clean());
});

gulp.task('scripts', function () {

  return gulp.src(config.srcJs)

    // jshint
    .pipe(plugins.jshint())
    .pipe(plugins.jshint.reporter('jshint-stylish'))
    .pipe(plugins.if(ciMode, plugins.jshint.reporter('fail')))

    // package
    .pipe(plugins.concat(config.buildJsFilename))
    .pipe(plugins.header(config.closureStart))
    .pipe(plugins.footer(config.closureEnd))
    .pipe(plugins.header(config.banner))
    .pipe(gulp.dest(config.buildFolder))
    .pipe(plugins.filesize())

    // minify
    .pipe(plugins.uglify())
    .pipe(plugins.rename({ extname: '.min.js' }))
    .pipe(gulp.dest(config.buildFolder))
    .pipe(plugins.filesize())
    .on('error', plugins.util.log);

});

gulp.task('test', function () {

  karmaConfig({
    set: function (testConfig) {

      extend(testConfig, {
        singleRun: ciMode,
        autoWatch: !ciMode,
        browsers: ['PhantomJS']
      });

      karma.start(testConfig, function (exitCode) {
        plugins.util.log('Karma has exited with ' + exitCode);
        process.exit(exitCode);
      });
    }
  });
});

gulp.task('watch', function () {
  return gulp.watch(config.srcJs, ['scripts']);
});

gulp.task('ci', function () {
  ciMode = true;
  return gulp.start(['clean', 'scripts', 'test']);
});

gulp.task('default', ['scripts']);