1 | 'use strict';
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2 |
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3 | var isSvg = require('is-svg');
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4 | var SVGO = require('svgo');
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5 | var through = require('through2');
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6 |
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7 | module.exports = function (opts) {
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8 | opts = opts || {};
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9 |
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10 | return through.ctor({objectMode: true}, function (file, enc, cb) {
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11 | if (file.isNull()) {
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12 | cb(null, file);
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13 | return;
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14 | }
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15 |
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16 | if (file.isStream()) {
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17 | cb(new Error('Streaming is not supported'));
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18 | return;
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19 | }
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20 |
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21 | if (!isSvg(file.contents)) {
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22 | cb(null, file);
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23 | return;
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24 | }
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25 |
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26 | try {
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27 | var svgo = new SVGO(opts);
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28 |
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29 | svgo.optimize(file.contents.toString('utf8'), function (res) {
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30 | if (!res.data || !res.data.length) {
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31 | return;
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32 | }
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33 |
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34 | res.data = res.data.replace(/&(?!amp;)/g, '&');
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35 | res.data = new Buffer(res.data);
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36 |
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37 | file.contents = res.data;
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38 | });
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39 | } catch (err) {
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40 | err.fileName = file.path;
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41 | cb(err);
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42 | return;
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43 | }
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44 |
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45 | cb(null, file);
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46 | });
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47 | };
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