163 lines
3.6 KiB
JavaScript
163 lines
3.6 KiB
JavaScript
'use strict';
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var browserify = require('browserify'),
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derequire = require('browserify-derequire'),
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UglifyJS = require('uglify-js'),
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collapse = require('bundle-collapser/plugin'),
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concat = require('source-map-concat'),
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fs = require('fs'),
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path = require('path');
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var BANNER = fs.readFileSync(__dirname + '/banner.txt', 'utf8'),
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BANNER_MIN = fs.readFileSync(__dirname + '/banner-min.txt', 'utf8');
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function extractSourceMap(content) {
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var SOURCE_MAP_HEADER = '//# sourceMappingURL=data:application/json;base64,';
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var idx = content.indexOf(SOURCE_MAP_HEADER),
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map, code;
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if (idx !== -1) {
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code = content.substring(0, idx);
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map = content.substring(idx + SOURCE_MAP_HEADER.length);
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map = new Buffer(map, 'base64').toString();
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map = map.replace(/\\\\/g, '/'); // convert \\ -> /
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var dir = __dirname;
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var dirPattern = dir.replace(/\\/g, '/').replace(/\./g, '\\.') + '/';
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var pattern = new RegExp(dirPattern, 'g');
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map = map.replace(pattern, '');
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return {
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code: code,
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map: JSON.parse(map)
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};
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} else {
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throw new Error('no attached source map');
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}
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}
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function uglify(bundle, preamble) {
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return UglifyJS.minify(bundle.code, {
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fromString: true,
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output: {
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preamble: preamble
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}
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});
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}
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function Timer() {
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this.reset();
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}
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Timer.prototype.done = function(message) {
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console.log(message, '[' + (this.now() - this.start) + 'ms]');
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this.reset();
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};
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Timer.prototype.reset = function() {
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this.start = this.now();
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};
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Timer.prototype.now = function() {
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return new Date().getTime();
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};
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module.exports = function(grunt) {
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grunt.registerMultiTask('bundle', function(target) {
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var data = this.data,
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variant = data.name,
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dest = data.dest,
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src = path.resolve(data.src);
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grunt.config.set('config.variant', variant);
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var done = this.async();
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var browserifyOptions = {
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standalone: 'BpmnJS',
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debug: true,
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builtins: false,
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insertGlobalVars: {
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process: function () {
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return 'undefined';
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},
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Buffer: function () {
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return 'undefined';
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}
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}
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};
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var timer = new Timer();
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var targetFileBase = path.join(dest, variant);
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var banner = grunt.template.process(BANNER, grunt.config.get()),
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bannerMin = grunt.template.process(BANNER_MIN, grunt.config.get());
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browserify(browserifyOptions)
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.plugin(derequire)
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.plugin(collapse)
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.add(src)
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.bundle(function(err, result) {
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timer.done('bundled');
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if (err) {
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return done(err);
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}
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var bundled, minified;
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bundled = extractSourceMap(result.toString('utf8'));
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timer.done('extracted source map');
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try {
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minified = uglify(bundled, bannerMin);
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} catch (e) {
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return done(e);
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}
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timer.done('minified');
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var bannerBundled;
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try {
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bannerBundled = concat([ bundled ])
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.prepend(banner + '\n')
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.add('//# sourceMappingURL=' + variant + '.js.map')
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.toStringWithSourceMap();
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} catch (e) {
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console.error(e.stack);
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throw e;
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}
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timer.done('added banner');
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grunt.file.write(targetFileBase + '.js', bannerBundled.code, 'utf8');
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grunt.file.write(targetFileBase + '.js.map', bannerBundled.map, 'utf8');
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grunt.file.write(targetFileBase + '.min.js', minified.code, 'utf8');
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timer.done('all saved');
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done();
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});
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});
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}; |