1 |
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2 |
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3 | 'use strict';
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4 |
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5 | var Transform = require('stream').Transform,
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6 | BufferStreams = require('bufferstreams'),
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7 | SVGOptim = require('svgo'),
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8 | gutil = require('gulp-util');
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9 |
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10 | var PLUGIN_NAME = 'gulp-svgmin';
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11 |
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12 |
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13 | function minifySVGTransform(svgo) {
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14 | if (!(svgo instanceof SVGOptim)) {
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15 | svgo = new SVGOptim(svgo);
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16 | }
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17 |
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18 |
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19 | return function(err, buf, cb) {
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20 |
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21 | if (err) {
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22 | return cb(new gutil.PluginError(PLUGIN_NAME, err));
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23 | }
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24 |
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25 |
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26 | svgo.optimize(String(buf), function(result) {
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27 | if (result.error) {
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28 | return cb(new gutil.PluginError(PLUGIN_NAME, result.error));
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29 | }
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30 |
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31 |
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32 | cb(null, new Buffer(result.data));
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33 | });
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34 | };
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35 | }
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36 |
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37 |
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38 | function minifySVGGulp(plugins) {
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39 | var stream = new Transform({objectMode: true});
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40 | var svgo = new SVGOptim({ plugins: plugins });
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41 |
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42 | stream._transform = function(file, unused, done) {
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43 |
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44 | if (file.isNull()) {
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45 | stream.push(file);
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46 | return done();
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47 | }
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48 |
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49 | if (file.isStream()) {
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50 | file.contents = file.contents.pipe(
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51 | new BufferStreams(minifySVGTransform(svgo))
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52 | );
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53 | stream.push(file);
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54 | return done();
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55 | }
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56 |
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57 | svgo.optimize(String(file.contents), function(result) {
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58 | if (result.error) {
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59 | return stream.emit('error', new gutil.PluginError(PLUGIN_NAME, result.error));
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60 | }
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61 | file.contents = new Buffer(result.data);
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62 | stream.push(file);
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63 | done();
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64 | });
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65 | };
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66 |
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67 | return stream;
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68 | }
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69 |
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70 |
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71 | minifySVGGulp.fileTransform = minifySVGTransform;
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72 |
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73 |
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74 | module.exports = minifySVGGulp;
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75 |
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