1 |
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2 |
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3 |
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4 |
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5 | var fs = require("fs");
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6 | var path = require("path");
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7 | var async = require("async");
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8 | var loaderUtils = require("loader-utils");
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9 |
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10 |
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11 | var baseRegex = "\\s*[@#]\\s*sourceMappingURL\\s*=\\s*([^\\s]*)(?![\\S\\s]*sourceMappingURL)",
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12 |
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13 | regex1 = new RegExp("/\\*"+baseRegex+"\\s*\\*/"),
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14 |
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15 | regex2 = new RegExp("//"+baseRegex+"($|\n|\r\n?)"),
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16 |
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17 | regexDataUrl = /data:[^;\n]+(?:;charset=[^;\n]+)?;base64,([a-zA-Z0-9+/]+={0,2})/;
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18 |
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19 | module.exports = function(input, inputMap) {
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20 | this.cacheable && this.cacheable();
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21 | var resolve = this.resolve;
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22 | var addDependency = this.addDependency;
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23 | var emitWarning = this.emitWarning || function() {};
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24 | var match = input.match(regex1) || input.match(regex2);
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25 | if(match) {
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26 | var url = match[1];
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27 | var dataUrlMatch = regexDataUrl.exec(url);
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28 | var callback = this.async();
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29 | if(dataUrlMatch) {
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30 | var mapBase64 = dataUrlMatch[1];
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31 | var mapStr = (new Buffer(mapBase64, "base64")).toString();
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32 | var map;
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33 | try {
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34 | map = JSON.parse(mapStr)
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35 | } catch (e) {
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36 | emitWarning("Cannot parse inline SourceMap '" + mapBase64.substr(0, 50) + "': " + e);
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37 | return untouched();
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38 | }
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39 | processMap(map, this.context, callback);
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40 | } else {
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41 | resolve(this.context, loaderUtils.urlToRequest(url, true), function(err, result) {
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42 | if(err) {
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43 | emitWarning("Cannot find SourceMap '" + url + "': " + err);
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44 | return untouched();
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45 | }
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46 | addDependency(result);
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47 | fs.readFile(result, "utf-8", function(err, content) {
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48 | if(err) {
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49 | emitWarning("Cannot open SourceMap '" + result + "': " + err);
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50 | return untouched();
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51 | }
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52 | var map;
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53 | try {
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54 | map = JSON.parse(content);
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55 | } catch (e) {
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56 | emitWarning("Cannot parse SourceMap '" + url + "': " + e);
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57 | return untouched();
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58 | }
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59 | processMap(map, path.dirname(result), callback);
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60 | });
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61 | }.bind(this));
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62 | return;
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63 | }
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64 | } else {
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65 | var callback = this.callback;
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66 | return untouched();
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67 | }
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68 | function untouched() {
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69 | callback(null, input, inputMap);
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70 | }
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71 | function processMap(map, context, callback) {
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72 | if(!map.sourcesContent || map.sourcesContent.length < map.sources.length) {
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73 | var sourcePrefix = map.sourceRoot ? map.sourceRoot + "/" : "";
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74 | map.sources = map.sources.map(function(s) { return sourcePrefix + s; });
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75 | delete map.sourceRoot;
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76 | var missingSources = map.sourcesContent ? map.sources.slice(map.sourcesContent.length) : map.sources;
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77 | async.map(missingSources, function(source, callback) {
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78 | resolve(context, loaderUtils.urlToRequest(source, true), function(err, result) {
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79 | if(err) {
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80 | emitWarning("Cannot find source file '" + source + "': " + err);
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81 | return callback(null, null);
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82 | }
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83 | addDependency(result);
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84 | fs.readFile(result, "utf-8", function(err, content) {
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85 | if(err) {
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86 | emitWarning("Cannot open source file '" + result + "': " + err);
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87 | return callback(null, null);
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88 | }
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89 | callback(null, {
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90 | source: result,
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91 | content: content
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92 | });
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93 | });
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94 | });
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95 | }, function(err, info) {
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96 | map.sourcesContent = map.sourcesContent || [];
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97 | info.forEach(function(res) {
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98 | if(res) {
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99 | map.sources[map.sourcesContent.length] = res.source;
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100 | map.sourcesContent.push(res.content);
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101 | } else {
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102 | map.sourcesContent.push(null);
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103 | }
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104 | });
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105 | processMap(map, context, callback);
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106 | });
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107 | return;
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108 | }
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109 | callback(null, input.replace(match[0], ''), map);
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110 | }
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111 | }
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