gulpfile.js

var gulp = require('gulp'),
    gutil = require('gulp-util'),
    jshint = require('gulp-jshint'),
    jshintStylish = require('jshint-stylish'),
    mocha = require('gulp-mocha'),
    complexity = require('gulp-complexity'),
    exec = require('child_process').exec,
    bump = require('gulp-bump'),
    debug = require('gulp-debug'),
    argv = require('minimist')(process.argv.slice(3));

gulp.task('complexity', function () {
    return gulp.src('lib/**/*.js')
        .pipe(complexity({
            cyclomatic: [5],
            halstead: [16],
            maintainability: [100]
        }));
});

gulp.task('lint', function () {
    gulp.src(['gulpfile.js', 'lib/**/*.js', 'test/**/*.js'])
        .pipe(jshint())
        .pipe(jshint.reporter(jshintStylish))
        .pipe(jshint.reporter('fail'));
});

gulp.task('test-unit', function () {
    return gulp.src('test/unit/*.js', { read: false })
        .pipe(mocha({
            reporter: 'spec',
            bail: false
        }));
});

gulp.task('test', [ 'test-unit' ], function () {
    return gulp.src('test/e2e/*.js', { read: false })
        .pipe(mocha({
            reporter: 'spec',
            bail: false
        }));
});

gulp.task('bump', function () {
    var packageFile = "./package.json";

    gulp.src(packageFile)
        .pipe(bump({ type: argv.type || 'build'}))
        .pipe(gulp.dest('./'))
        .on('end', function () {
            var newVersion = require(packageFile).version;

            exec('git commit -am "' + newVersion + '"; git tag ' + newVersion + '; git push --tags; git push', {}, function (err, stdout, stderr) {
                if (err) throw err;
                gutil.log(stdout, stderr);
            });
        });
});

gulp.task('tdd-watch', function () {
    gulp.watch([ 'lib/*.js', 'test/**/*.js' ], [ 'test' ]);
});

gulp.task('default', [ 'lint', 'test' ]);
gulp.task('tdd', [ 'test', 'tdd-watch' ]);