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9 | 'use strict';
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10 |
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11 | const fs = require('fs');
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12 | const path = require('path');
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13 | const paths = require('./paths');
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14 | const chalk = require('react-dev-utils/chalk');
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15 | const resolve = require('resolve');
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16 |
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17 |
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18 |
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19 |
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20 |
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21 |
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22 | function getAdditionalModulePaths(options = {}) {
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23 | const baseUrl = options.baseUrl;
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24 |
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25 |
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26 |
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27 | if (baseUrl == null) {
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28 |
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29 |
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30 |
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31 |
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32 | const nodePath = process.env.NODE_PATH || '';
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33 | return nodePath.split(path.delimiter).filter(Boolean);
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34 | }
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35 |
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36 | const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
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37 |
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38 |
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39 |
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40 | if (path.relative(paths.appNodeModules, baseUrlResolved) === '') {
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41 | return null;
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42 | }
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43 |
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44 |
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45 | if (path.relative(paths.appSrc, baseUrlResolved) === '') {
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46 | return [paths.appSrc];
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47 | }
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48 |
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49 |
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50 |
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51 |
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52 |
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53 |
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54 | if (path.relative(paths.appPath, baseUrlResolved) === '') {
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55 | return null;
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56 | }
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57 |
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58 |
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59 | throw new Error(
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60 | chalk.red.bold(
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61 | "Your project's `baseUrl` can only be set to `src` or `node_modules`." +
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62 | ' Create React App does not support other values at this time.'
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63 | )
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64 | );
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65 | }
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66 |
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67 |
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68 |
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69 |
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70 |
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71 |
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72 | function getWebpackAliases(options = {}) {
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73 | const baseUrl = options.baseUrl;
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74 |
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75 | if (!baseUrl) {
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76 | return {};
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77 | }
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78 |
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79 | const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
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80 |
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81 | if (path.relative(paths.appPath, baseUrlResolved) === '') {
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82 | return {
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83 | src: paths.appSrc,
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84 | };
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85 | }
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86 | }
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87 |
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88 |
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89 |
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90 |
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91 |
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92 |
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93 | function getJestAliases(options = {}) {
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94 | const baseUrl = options.baseUrl;
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95 |
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96 | if (!baseUrl) {
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97 | return {};
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98 | }
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99 |
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100 | const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
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101 |
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102 | if (path.relative(paths.appPath, baseUrlResolved) === '') {
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103 | return {
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104 | 'src/(.*)$': '<rootDir>/src/$1',
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105 | };
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106 | }
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107 | }
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108 |
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109 | function getModules() {
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110 |
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111 | const hasTsConfig = fs.existsSync(paths.appTsConfig);
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112 | const hasJsConfig = fs.existsSync(paths.appJsConfig);
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113 |
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114 | if (hasTsConfig && hasJsConfig) {
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115 | throw new Error(
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116 | 'You have both a tsconfig.json and a jsconfig.json. If you are using TypeScript please remove your jsconfig.json file.'
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117 | );
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118 | }
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119 |
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120 | let config;
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121 |
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122 |
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123 |
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124 |
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125 | if (hasTsConfig) {
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126 | const ts = require(resolve.sync('typescript', {
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127 | basedir: paths.appNodeModules,
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128 | }));
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129 | config = ts.readConfigFile(paths.appTsConfig, ts.sys.readFile).config;
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130 |
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131 |
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132 | } else if (hasJsConfig) {
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133 | config = require(paths.appJsConfig);
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134 | }
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135 |
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136 | config = config || {};
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137 | const options = config.compilerOptions || {};
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138 |
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139 | const additionalModulePaths = getAdditionalModulePaths(options);
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140 |
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141 | return {
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142 | additionalModulePaths: additionalModulePaths,
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143 | webpackAliases: getWebpackAliases(options),
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144 | jestAliases: getJestAliases(options),
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145 | hasTsConfig,
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146 | };
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147 | }
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148 |
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149 | module.exports = getModules();
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