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- const applySourceMap = require('vinyl-sourcemaps-apply');
- const CleanCSS = require('clean-css');
- const objectAssign = require('object-assign');
- const path = require('path');
- const PluginError = require('gulp-util').PluginError;
- const through = require('through2');
- module.exports = function gulpCleanCSS(options, callback) {
- options = options || {};
- if (arguments.length === 1 && Object.prototype.toString.call(arguments[0]) === '[object Function]')
- callback = arguments[0];
- var transform = function (file, enc, cb) {
- if (!file || !file.contents)
- return cb(null, file);
- if (file.isStream()) {
- this.emit('error', new PluginError('gulp-clean-css', 'Streaming not supported!'));
- return cb(null, file);
- }
- var fileOptions = objectAssign({target: file.path}, options);
- if (!fileOptions.relativeTo && file.path)
- fileOptions.relativeTo = path.dirname(path.resolve(file.path));
- if (file.sourceMap)
- fileOptions.sourceMap = JSON.parse(JSON.stringify(file.sourceMap));
- var style = file.contents ? file.contents.toString() : '';
- new CleanCSS(fileOptions).minify(style, function (errors, css) {
- if (errors)
- return cb(errors.join(' '));
- if (typeof callback === 'function') {
- var details = {
- 'stats': css.stats,
- 'errors': css.errors,
- 'warnings': css.warnings,
- 'path': file.path,
- 'name': file.path.split(file.base)[1]
- }
- if (css.sourceMap)
- details['sourceMap'] = css.sourceMap;
- callback(details);
- }
- file.contents = new Buffer(css.styles);
- if (css.sourceMap) {
- var map = JSON.parse(css.sourceMap);
- map.file = path.relative(file.base, file.path);
- map.sources = map.sources.map(function (src) {
- return path.relative(file.base, file.path)
- });
- applySourceMap(file, map);
- }
- cb(null, file);
- });
- };
- return through.obj(transform);
- };
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