1 | const fs = require('fs');
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2 | const path = require('path');
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3 | const fetch = require('node-fetch');
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4 | const crypto = require('crypto');
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5 | const {ensureParsed} = require('ast-matcher');
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6 | const convert = require('convert-source-map');
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7 | const url = require('url');
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8 | require('./ensure-parser-set')();
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9 |
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10 | const jsExtentions = ['.js', '.ts', '.jsx', '.tsx', '.cjs', '.mjs'];
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11 |
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12 | exports.stripJsExtension = function(d) {
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13 | const ext = path.extname(d || '');
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14 | if (jsExtentions.includes(ext)) {
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15 | return d.slice(0, - ext.length);
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16 | }
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17 | return d;
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18 | };
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19 |
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20 | exports.isPackageName = function(path) {
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21 | if (path.startsWith('.')) return false;
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22 | const parts = path.split('/');
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23 |
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24 | return parts.length === 1 || (parts.length === 2 && parts[0].startsWith('@'));
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25 | };
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26 |
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27 | function fsReadFile(filePath) {
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28 | return new Promise((resolve, reject) => {
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29 | fs.readFile(filePath, (err, data) => {
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30 | if (err) reject(err);
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31 | resolve(data);
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32 | });
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33 | })
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34 | }
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35 |
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36 | exports.fsReadFile = fsReadFile;
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37 |
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38 | function fsExists(filePath) {
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39 | return new Promise(resolve => {
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40 | fs.stat(filePath, (err, stats) => {
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41 | if (err) resolve(false);
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42 | else resolve(stats.isFile());
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43 | });
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44 | });
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45 | }
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46 |
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47 | exports.fsExists = fsExists;
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48 |
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49 | exports.contentOrFile = function(pathOrContent, mock) {
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50 |
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51 | let _readFile = (mock && mock.readFile) || fsReadFile;
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52 |
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53 | if (typeof pathOrContent !== 'string' || !pathOrContent) {
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54 | return Promise.reject(new Error('No content or file provided'));
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55 | }
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56 |
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57 |
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58 | if (pathOrContent.match(/^https?:\/\//)) {
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59 |
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60 | const remote = url.parse(pathOrContent);
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61 | const remotePath = remote.hostname + remote.pathname;
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62 |
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63 | return fetch(pathOrContent)
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64 | .then(response => {
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65 | if (response.ok) return response.text();
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66 | else throw new Error(response.statusText)
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67 | })
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68 | .then(text => {
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69 | ensureParsed(text);
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70 |
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71 | return text;
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72 | })
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73 | .then(text => ({
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74 | path: remotePath,
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75 | contents: ensureSemicolon(stripSourceMappingUrl(text || '')),
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76 | }));
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77 | }
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78 |
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79 | if (pathOrContent.endsWith('.js')) {
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80 | return _readFile(pathOrContent)
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81 | .then(buffer => buffer.toString())
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82 | .then(text => ({
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83 | path: pathOrContent.replace(/\\/g, '/'),
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84 | contents: ensureSemicolon(stripSourceMappingUrl(text || '')),
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85 | sourceMap: getSourceMap(text, pathOrContent)
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86 | }));
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87 | }
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88 |
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89 | return new Promise(resolve => {
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90 | ensureParsed(pathOrContent);
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91 | resolve({
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92 | contents: ensureSemicolon(stripSourceMappingUrl(pathOrContent || ''))
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93 | });
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94 | });
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95 | };
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96 |
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97 | exports.generateHash = function(bufOrStr) {
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98 | return crypto.createHash('md5').update(bufOrStr).digest('hex');
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99 | };
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100 |
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101 | function stripSourceMappingUrl(contents) {
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102 | return convert.removeMapFileComments(convert.removeComments(contents));
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103 | }
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104 |
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105 | exports.stripSourceMappingUrl = stripSourceMappingUrl;
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106 |
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107 | function getSourceMap(contents, filePath) {
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108 | const dir = (filePath && path.dirname(filePath)) || '';
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109 |
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110 | const sourceMap = (() => {
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111 | try {
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112 | let converter = convert.fromSource(contents);
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113 | if (converter) return converter.sourcemap;
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114 |
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115 | if (filePath) {
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116 | converter = convert.fromMapFileSource(contents, dir);
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117 | if (converter) return converter.sourcemap;
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118 | }
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119 | } catch (err) {
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120 | return;
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121 | }
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122 | })();
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123 |
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124 | if (sourceMap && sourceMap.sources) {
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125 | const {sourceRoot} = sourceMap;
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126 | if (sourceRoot) {
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127 |
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128 | if (sourceRoot !== '/') {
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129 | sourceMap.sources = sourceMap.sources.map(s => path.join(sourceRoot, s).replace(/\\/g, '/'));
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130 | }
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131 | delete sourceMap.sourceRoot;
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132 | }
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133 |
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134 | sourceMap.sources = sourceMap.sources.map(s => path.join(dir, s).replace(/\\/g, '/'));
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135 | if (filePath) {
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136 | sourceMap.file = filePath.replace(/\\/g, '/');
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137 | }
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138 |
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139 | if (!sourceMap.sourcesContent) {
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140 |
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141 | try {
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142 | sourceMap.sourcesContent = sourceMap.sources.map(s =>
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143 | fs.readFileSync(s, 'utf8')
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144 | );
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145 | } catch (err) {
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146 |
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147 | }
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148 | }
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149 | }
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150 |
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151 | return sourceMap;
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152 | }
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153 |
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154 | exports.getSourceMap = getSourceMap;
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155 |
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156 | function ensureSemicolon(contents) {
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157 | let trimed = contents.trim();
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158 | if (trimed.slice(-1) === ';') return trimed;
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159 | return trimed + ';';
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160 | }
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161 |
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162 | exports.ensureSemicolon = ensureSemicolon;
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