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- 'use strict';
- var through = require('through2');
- var deap = require('deap');
- var PluginError = require('gulp-util/lib/PluginError');
- var log = require('fancy-log');
- var applySourceMap = require('vinyl-sourcemaps-apply');
- var saveLicense = require('uglify-save-license');
- var isObject = require('isobject');
- var createError = require('./lib/create-error');
- var reSourceMapComment = /\n\/\/# sourceMappingURL=.+?$/;
- function trycatch(fn, handle) {
- try {
- return fn();
- } catch (err) {
- return handle(err);
- }
- }
- function setup(opts) {
- if (opts && !isObject(opts)) {
- log('gulp-uglify expects an object, non-object provided');
- opts = {};
- }
- var options = deap({}, opts, {
- fromString: true,
- output: {}
- });
- if (options.preserveComments === 'all') {
- options.output.comments = true;
- } else if (options.preserveComments === 'some') {
- // preserve comments with directives or that start with a bang (!)
- options.output.comments = /^!|@preserve|@license|@cc_on/i;
- } else if (options.preserveComments === 'license') {
- options.output.comments = saveLicense;
- } else if (typeof options.preserveComments === 'function') {
- options.output.comments = options.preserveComments;
- }
- return options;
- }
- module.exports = function (opts, uglify) {
- function minify(file, encoding, callback) {
- var options = setup(opts || {});
- if (file.isNull()) {
- return callback(null, file);
- }
- if (file.isStream()) {
- return callback(createError(file, 'Streaming not supported'));
- }
- if (file.sourceMap) {
- options.outSourceMap = file.relative;
- }
- var originalContents = String(file.contents);
- var mangled = trycatch(function () {
- var m = uglify.minify(String(file.contents), options);
- m.code = new Buffer(m.code.replace(reSourceMapComment, ''));
- return m;
- }, createError.bind(null, file));
- if (mangled instanceof PluginError) {
- return callback(mangled);
- }
- file.contents = mangled.code;
- if (file.sourceMap) {
- var sourceMap = JSON.parse(mangled.map);
- sourceMap.sources = [file.relative];
- sourceMap.sourcesContent = [originalContents];
- applySourceMap(file, sourceMap);
- }
- callback(null, file);
- }
- return through.obj(minify);
- };
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