gulpfile.js

'use strict';

var gulp = require('gulp');
var sass = require('gulp-sass');
var browserify = require('browserify');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var through2 = require('through2');
var path = require('path');
var livereload = require('gulp-livereload');
var http = require('http');
var st = require('st');


gulp.task('assets', function() {
  return gulp.src('assets/**/*', {base:"./assets"})
        .pipe(gulp.dest('dist'));

  gulp.src('data/**/*', {base:"."})
        .pipe(gulp.dest('dist'));
});

gulp.task('sass', function () {
  return gulp.src('./lens.scss')
    .pipe(sass().on('error', sass.logError))
    .pipe(rename('lens.css'))
    .pipe(gulp.dest('./dist'));
});

gulp.task('browserify', function () {
    return gulp.src('./boot.js')
        .pipe(through2.obj(function (file, enc, next) {
            browserify(file.path)
                .bundle(function (err, res) {
                    if (err) { return next(err); }
                    file.contents = res;
                    next(null, file);
                });
        }))
        .on('error', function (error) {
            console.log(error.stack);
            this.emit('end');
        })
        .pipe(uglify())
        .pipe(rename('lens.js'))
        .pipe(gulp.dest('./dist'));
});

gulp.task('copy', function() {
    gulp.src('dist/index.html')
    .pipe(gulp.dest(' ../../../../tmp/'));
});

gulp.task('server', function(done) {
  http.createServer(
    st({ path: __dirname + '/dist', index: 'index.html', cache: false })
  ).listen(8080, done);
});


gulp.task('default', gulp.series('assets', 'sass', 'browserify'));

gulp.task('watch', function() {
      gulp.watch('node_modules/lens/**/*.*', ['default'])
});