gulpfile.js

var gulp = require('gulp');
var livereload = require('gulp-livereload');
var serve = require('gulp-serve');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');

// Static file server
gulp.task('server', serve({
    root: ['example', 'dist'],
    port: 7000
}));

// Task for refreshing everything (HTML, etc)
gulp.task('refresh-browser', function() {
    gulp.src('package.json', {read: false})
        .pipe(livereload());
});

// Files to bundle
JS_DIST_FILES = [
    'libs/tracekit.js',
    'src/opbeat.js'
];

// Bundles files into
gulp.task('process-scripts', function() {
    gulp.src(JS_DIST_FILES)
        .pipe(concat('opbeat.js'))
        .pipe(gulp.dest('./dist'))
        .pipe(uglify().on('error', function(e) { console.log('\x07',e.message); return this.end(); }))
        .pipe(concat('opbeat.min.js'))
        .pipe(gulp.dest('./dist'))
        .pipe(livereload());
});

// Development mode
gulp.task('watch', [], function(cb){

    // Livereload
    livereload.listen();

    gulp.run(
        'process-scripts',
        'server'
    );

    // Watch JS files
    gulp.watch(['libs/**', 'src/**'], ['process-scripts']);

    // Watch example files
    gulp.watch('example/**', ['refresh-browser']);

    console.log('\nExample site running on http://localhost:7000/\n');
});


//
// Default task
//
gulp.task('default', function(){
    var response = ['',
        'No task selected.',
        'Available tasks:', '',
        'gulp watch       - Watch files and preview example site on localhost.', ''
    ].join('\n');

    console.log(response);
});