1 | const {analyze} = require('eslint-scope');
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2 | const astMatcher = require('ast-matcher');
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3 | const {ensureParsed, compilePattern, extract, traverse, STOP} = astMatcher;
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4 | require('./ensure-parser-set')();
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5 |
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6 |
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7 | const amdefinePattern = compilePattern('var define = require("amdefine")(__anl)').declarations[0];
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8 |
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9 | function globalIndentifiers (code) {
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10 | let ast = ensureParsed(code);
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11 | let scopeManager = analyze(ast, {ecmaVersion: 6});
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12 | let globalScope = scopeManager.acquire(ast);
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13 |
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14 |
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15 |
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16 |
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17 |
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18 | let globals = Object.create(null);
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19 |
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20 | globalScope.through.forEach(function (ref) {
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21 | let name = ref.identifier.name;
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22 |
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23 | let variable = globalScope.set.get(name);
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24 |
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25 |
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26 | if (variable && !(name === 'define' && extract(amdefinePattern, variable.defs[0].node))) {
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27 | return;
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28 | }
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29 |
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30 | if (globals[name]) {
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31 | globals[name].push(ref.identifier);
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32 | } else {
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33 | globals[name] = [ref.identifier];
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34 | }
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35 | });
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36 |
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37 | return globals;
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38 | }
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39 |
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40 | function some(list, interested) {
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41 | if (interested) {
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42 | let len = interested.length
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43 | for (let i = 0; i < len; i += 1) {
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44 | let item = interested[i];
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45 |
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46 | if (list.indexOf(item) !== -1) {
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47 | return true;
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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 | const cjsRequireFinder = astMatcher('require(__str)');
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54 |
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55 | const cjsDeps = function (code, globals) {
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56 | let deps = [];
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57 |
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58 | let matches = cjsRequireFinder(code);
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59 | if (matches) {
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60 | matches.forEach(function (m) {
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61 | if (globals['require'].indexOf(m.node.callee) !== -1) {
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62 | deps.push(m.node.arguments[0].value);
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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 | if (deps.length) return deps;
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68 | };
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69 |
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70 | function usesCommonJs (code, globals) {
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71 | let ast = ensureParsed(code);
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72 | if (!globals) {
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73 | globals = globalIndentifiers(ast);
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74 | }
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75 | let usage = {};
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76 |
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77 | if (globals['require']) {
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78 | const deps = cjsDeps(ast, globals);
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79 | if (deps) usage.require = deps;
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80 | }
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81 |
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82 | if (globals['exports']) usage['exports'] = true;
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83 | if (globals['module']) usage['moduleExports'] = true;
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84 | if (globals['__dirname']) usage['dirname'] = true;
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85 | if (globals['__filename']) usage['filename'] = true;
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86 |
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87 | if (globals['global']) usage['global'] = true;
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88 | if (globals['process']) usage['process'] = true;
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89 | if (globals['Buffer']) usage['Buffer'] = true;
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90 |
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91 | if (Object.keys(usage).length) {
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92 | return usage;
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93 | }
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94 | }
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95 |
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96 | const amdRequireFinders = [
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97 | astMatcher('require([__anl])'),
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98 | astMatcher('require([__anl], __any)')
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99 | ];
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100 |
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101 | const amdRequireFinders2 = [
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102 |
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103 | astMatcher('require(__any, [__anl])'),
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104 | astMatcher('require(__any, [__anl], __any)'),
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105 | ];
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106 |
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107 | const amdRequireDeps = function (code, globals) {
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108 | let deps = [];
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109 |
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110 | amdRequireFinders.forEach(function (f) {
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111 | let matches = f(code);
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112 | if (matches) {
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113 | matches.forEach(function (m) {
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114 | if (globals['require'].indexOf(m.node.callee) !== -1) {
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115 | m.node.arguments[0].elements.forEach(arg => {
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116 | deps.push(arg.value);
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117 | })
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118 | }
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119 | });
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120 | }
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121 | });
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122 |
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123 | amdRequireFinders2.forEach(function (f) {
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124 | let matches = f(code);
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125 | if (matches) {
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126 | matches.forEach(function (m) {
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127 | if (globals['require'].indexOf(m.node.callee) !== -1) {
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128 | m.node.arguments[1].elements.forEach(arg => {
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129 | deps.push(arg.value);
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130 | })
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131 | }
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132 | });
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133 | }
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134 | });
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135 |
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136 | if (deps.length) return deps;
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137 | };
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138 |
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139 | const amdRequireJSFinders = [
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140 | astMatcher('requirejs([__anl])'),
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141 | astMatcher('requirejs([__anl], __any)')
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142 | ];
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143 |
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144 | const amdRequireJSFinders2 = [
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145 |
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146 | astMatcher('requirejs(__any, [__anl])'),
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147 | astMatcher('requirejs(__any, [__anl], __any)'),
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148 | ];
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149 |
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150 | const amdRequireJSDeps = function (code, globals) {
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151 | let deps = [];
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152 |
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153 | amdRequireJSFinders.forEach(function (f) {
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154 | let matches = f(code);
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155 | if (matches) {
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156 | matches.forEach(function (m) {
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157 | if (globals['requirejs'].indexOf(m.node.callee) !== -1) {
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158 | m.node.arguments[0].elements.forEach(arg => {
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159 | if (arg.type === 'Literal') deps.push(arg.value);
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160 | })
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161 | }
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162 | });
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163 | }
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164 | });
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165 |
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166 | amdRequireJSFinders2.forEach(function (f) {
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167 | let matches = f(code);
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168 | if (matches) {
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169 | matches.forEach(function (m) {
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170 | if (globals['requirejs'].indexOf(m.node.callee) !== -1) {
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171 | m.node.arguments[1].elements.forEach(arg => {
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172 | if (arg.type === 'Literal') deps.push(arg.value);
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173 | })
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174 | }
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175 | });
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176 | }
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177 | });
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178 |
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179 | if (deps.length) return deps;
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180 | };
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181 |
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182 | const amdRequireConfigFinder = astMatcher('require.config(__anl)');
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183 | const amdRequireJSConfigFinder = astMatcher('requirejs.config(__anl)');
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184 |
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185 | const findAmdRequireConfigIdentifiers = function (code) {
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186 | let requireIdendifers = [];
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187 |
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188 | let matches = amdRequireConfigFinder(code);
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189 | if (matches) {
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190 | matches.forEach(function (m) {
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191 | requireIdendifers.push(m.node.callee.object);
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192 | });
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193 | }
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194 |
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195 | if (requireIdendifers.length) return requireIdendifers;
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196 | };
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197 |
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198 | const findAmdRequireJSConfigIdentifiers = function (code) {
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199 | let requireIdendifers = [];
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200 |
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201 | let matches = amdRequireJSConfigFinder(code);
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202 | if (matches) {
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203 | matches.forEach(function (m) {
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204 | requireIdendifers.push(m.node.callee.object);
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205 | });
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206 | }
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207 |
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208 | if (requireIdendifers.length) return requireIdendifers;
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209 | };
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210 |
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211 | function usesAmdOrRequireJs (code, globals) {
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212 | let ast = ensureParsed(code);
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213 | if (!globals) {
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214 | globals = globalIndentifiers(ast);
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215 | }
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216 | let usage = {};
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217 |
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218 |
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219 | if (globals['requirejs']) {
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220 | const deps = amdRequireJSDeps(ast, globals);
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221 | if (deps) usage['requirejs'] = deps;
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222 |
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223 | if (some(globals['requirejs'], findAmdRequireJSConfigIdentifiers(ast))) {
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224 | usage['requireConfig'] = true;
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225 | }
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226 | }
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227 |
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228 | if (globals['require']) {
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229 | const deps = amdRequireDeps(ast, globals);
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230 | if (deps) usage['require'] = deps;
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231 |
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232 | if (some(globals['require'], findAmdRequireConfigIdentifiers(ast))) {
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233 | usage['requireConfig'] = true;
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234 | }
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235 | }
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236 |
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237 | if (globals['define']) {
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238 | usage['define'] = true;
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239 |
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240 |
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241 | }
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242 |
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243 | if (Object.keys(usage).length) {
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244 | return usage;
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245 | }
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246 | }
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247 |
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248 | function usesEsm(code) {
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249 | let ast = ensureParsed(code);
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250 | let isEsm = false;
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251 | traverse(ast, node => {
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252 | if (node.type === 'ImportDeclaration' ||
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253 | node.type === 'ExportAllDeclaration' ||
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254 | node.type === 'ExportDefaultDeclaration' ||
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255 | node.type === 'ExportNamedDeclaration') {
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256 | isEsm = true;
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257 | return STOP;
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258 | }
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259 | });
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260 | return isEsm;
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261 | }
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262 |
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263 | exports.globalIndentifiers = globalIndentifiers;
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264 | exports.usesCommonJs = usesCommonJs;
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265 | exports.usesAmdOrRequireJs = usesAmdOrRequireJs;
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266 | exports.usesEsm = usesEsm;
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