80 lines
1.8 KiB
JavaScript
80 lines
1.8 KiB
JavaScript
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'use strict';
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var Buffer = require('safe-buffer').Buffer;
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var applySourceMap = require('vinyl-sourcemaps-apply');
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var isObject = require('isobject');
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var extend = require('extend-shallow');
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var createError = require('./create-error');
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module.exports = function(uglify, log) {
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function setup(opts) {
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if (opts && !isObject(opts)) {
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log.warn('gulp-uglify expects an object, non-object provided');
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opts = {};
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}
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return extend(
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{},
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{
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output: {}
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},
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opts
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);
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}
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return function(opts) {
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return function(file) {
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var options = setup(opts || {});
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var hasSourceMaps = Boolean(file.sourceMap);
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if (file.isNull()) {
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return file;
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}
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if (file.isStream()) {
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throw createError(file, 'Streaming not supported', null);
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}
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if (hasSourceMaps) {
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options.sourceMap = {
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filename: file.sourceMap.file,
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includeSources: true
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};
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// UglifyJS generates broken source maps if the input source map
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// does not contain mappings.
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if (file.sourceMap.mappings) {
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options.sourceMap.content = file.sourceMap;
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}
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}
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var fileMap = {};
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fileMap[file.relative] = String(file.contents);
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var mangled = uglify.minify(fileMap, options);
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if (!mangled || mangled.error) {
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throw createError(
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file,
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'unable to minify JavaScript',
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mangled && mangled.error
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);
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}
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if (mangled.warnings) {
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mangled.warnings.forEach(function(warning) {
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log.warn('gulp-uglify [%s]: %s', file.relative, warning);
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});
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}
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file.contents = Buffer.from(mangled.code);
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if (hasSourceMaps) {
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var sourceMap = JSON.parse(mangled.map);
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applySourceMap(file, sourceMap);
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}
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return file;
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};
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};
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};
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