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