1 |
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2 |
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4 |
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5 |
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6 | "use strict";
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7 |
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8 | const ConstDependency = require("./dependencies/ConstDependency");
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9 |
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10 |
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11 |
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12 |
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13 | const nestedWebpackRequireTag = Symbol("nested __webpack_require__");
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14 |
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15 | class CompatibilityPlugin {
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16 | |
17 |
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18 |
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19 |
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20 |
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21 | apply(compiler) {
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22 | compiler.hooks.compilation.tap(
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23 | "CompatibilityPlugin",
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24 | (compilation, { normalModuleFactory }) => {
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25 | compilation.dependencyTemplates.set(
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26 | ConstDependency,
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27 | new ConstDependency.Template()
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28 | );
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29 |
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30 | normalModuleFactory.hooks.parser
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31 | .for("javascript/auto")
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32 | .tap("CompatibilityPlugin", (parser, parserOptions) => {
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33 | if (
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34 | parserOptions.browserify !== undefined &&
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35 | !parserOptions.browserify
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36 | )
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37 | return;
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38 |
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39 | parser.hooks.call
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40 | .for("require")
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41 | .tap("CompatibilityPlugin", expr => {
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42 |
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43 | if (expr.arguments.length !== 2) return;
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44 | const second = parser.evaluateExpression(expr.arguments[1]);
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45 | if (!second.isBoolean()) return;
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46 | if (second.asBool() !== true) return;
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47 | const dep = new ConstDependency("require", expr.callee.range);
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48 | dep.loc = expr.loc;
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49 | if (parser.state.current.dependencies.length > 0) {
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50 | const last =
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51 | parser.state.current.dependencies[
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52 | parser.state.current.dependencies.length - 1
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53 | ];
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54 | if (
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55 | last.critical &&
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56 | last.options &&
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57 | last.options.request === "." &&
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58 | last.userRequest === "." &&
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59 | last.options.recursive
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60 | )
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61 | parser.state.current.dependencies.pop();
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62 | }
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63 | parser.state.module.addPresentationalDependency(dep);
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64 | return true;
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65 | });
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66 | });
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67 |
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68 | |
69 |
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70 |
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71 |
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72 | const handler = parser => {
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73 |
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74 | parser.hooks.preStatement.tap("CompatibilityPlugin", statement => {
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75 | if (
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76 | statement.type === "FunctionDeclaration" &&
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77 | statement.id &&
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78 | statement.id.name === "__webpack_require__"
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79 | ) {
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80 | const newName = `__nested_webpack_require_${statement.range[0]}__`;
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81 | parser.tagVariable(statement.id.name, nestedWebpackRequireTag, {
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82 | name: newName,
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83 | declaration: {
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84 | updated: false,
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85 | loc: statement.id.loc,
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86 | range: statement.id.range
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87 | }
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88 | });
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89 | return true;
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90 | }
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91 | });
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92 | parser.hooks.pattern
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93 | .for("__webpack_require__")
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94 | .tap("CompatibilityPlugin", pattern => {
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95 | const newName = `__nested_webpack_require_${pattern.range[0]}__`;
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96 | parser.tagVariable(pattern.name, nestedWebpackRequireTag, {
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97 | name: newName,
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98 | declaration: {
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99 | updated: false,
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100 | loc: pattern.loc,
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101 | range: pattern.range
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102 | }
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103 | });
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104 | return true;
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105 | });
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106 | parser.hooks.expression
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107 | .for(nestedWebpackRequireTag)
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108 | .tap("CompatibilityPlugin", expr => {
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109 | const { name, declaration } = parser.currentTagData;
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110 | if (!declaration.updated) {
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111 | const dep = new ConstDependency(name, declaration.range);
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112 | dep.loc = declaration.loc;
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113 | parser.state.module.addPresentationalDependency(dep);
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114 | declaration.updated = true;
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115 | }
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116 | const dep = new ConstDependency(name, expr.range);
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117 | dep.loc = expr.loc;
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118 | parser.state.module.addPresentationalDependency(dep);
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119 | return true;
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120 | });
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121 |
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122 |
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123 | parser.hooks.program.tap(
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124 | "CompatibilityPlugin",
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125 | (program, comments) => {
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126 | if (comments.length === 0) return;
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127 | const c = comments[0];
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128 | if (c.type === "Line" && c.range[0] === 0) {
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129 | if (parser.state.source.slice(0, 2).toString() !== "#!") return;
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130 |
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131 | const dep = new ConstDependency("//", 0);
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132 | dep.loc = c.loc;
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133 | parser.state.module.addPresentationalDependency(dep);
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134 | }
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135 | }
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136 | );
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137 | };
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138 |
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139 | normalModuleFactory.hooks.parser
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140 | .for("javascript/auto")
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141 | .tap("CompatibilityPlugin", handler);
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142 | normalModuleFactory.hooks.parser
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143 | .for("javascript/dynamic")
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144 | .tap("CompatibilityPlugin", handler);
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145 | normalModuleFactory.hooks.parser
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146 | .for("javascript/esm")
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147 | .tap("CompatibilityPlugin", handler);
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148 | }
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149 | );
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150 | }
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151 | }
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152 | module.exports = CompatibilityPlugin;
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