1 | "use strict";
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2 |
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3 | const path = require("path");
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4 | const os = require("os");
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5 | const {
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6 | validate
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7 | } = require("schema-utils");
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8 | const {
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9 | throttleAll,
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10 | memoize,
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11 | terserMinify,
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12 | uglifyJsMinify,
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13 | swcMinify,
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14 | esbuildMinify
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15 | } = require("./utils");
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16 | const schema = require("./options.json");
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17 | const {
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18 | minify
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19 | } = require("./minify");
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20 |
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21 | /** @typedef {import("schema-utils/declarations/validate").Schema} Schema */
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22 | /** @typedef {import("webpack").Compiler} Compiler */
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23 | /** @typedef {import("webpack").Compilation} Compilation */
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24 | /** @typedef {import("webpack").WebpackError} WebpackError */
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25 | /** @typedef {import("webpack").Asset} Asset */
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26 | /** @typedef {import("./utils.js").TerserECMA} TerserECMA */
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27 | /** @typedef {import("./utils.js").TerserOptions} TerserOptions */
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28 | /** @typedef {import("jest-worker").Worker} JestWorker */
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29 | /** @typedef {import("@jridgewell/trace-mapping").SourceMapInput} SourceMapInput */
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30 | /** @typedef {import("@jridgewell/trace-mapping").TraceMap} TraceMap */
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31 |
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32 | /** @typedef {RegExp | string} Rule */
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33 | /** @typedef {Rule[] | Rule} Rules */
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34 |
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35 | /**
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36 | * @callback ExtractCommentsFunction
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37 | * @param {any} astNode
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38 | * @param {{ value: string, type: 'comment1' | 'comment2' | 'comment3' | 'comment4', pos: number, line: number, col: number }} comment
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39 | * @returns {boolean}
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40 | */
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41 |
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42 | /**
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43 | * @typedef {boolean | 'all' | 'some' | RegExp | ExtractCommentsFunction} ExtractCommentsCondition
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44 | */
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45 |
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46 | /**
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47 | * @typedef {string | ((fileData: any) => string)} ExtractCommentsFilename
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48 | */
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49 |
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50 | /**
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51 | * @typedef {boolean | string | ((commentsFile: string) => string)} ExtractCommentsBanner
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52 | */
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53 |
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54 | /**
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55 | * @typedef {Object} ExtractCommentsObject
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56 | * @property {ExtractCommentsCondition} [condition]
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57 | * @property {ExtractCommentsFilename} [filename]
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58 | * @property {ExtractCommentsBanner} [banner]
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59 | */
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60 |
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61 | /**
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62 | * @typedef {ExtractCommentsCondition | ExtractCommentsObject} ExtractCommentsOptions
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63 | */
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64 |
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65 | /**
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66 | * @typedef {Object} MinimizedResult
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67 | * @property {string} code
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68 | * @property {SourceMapInput} [map]
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69 | * @property {Array<Error | string>} [errors]
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70 | * @property {Array<Error | string>} [warnings]
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71 | * @property {Array<string>} [extractedComments]
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72 | */
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73 |
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74 | /**
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75 | * @typedef {{ [file: string]: string }} Input
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76 | */
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77 |
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78 | /**
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79 | * @typedef {{ [key: string]: any }} CustomOptions
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80 | */
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81 |
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82 | /**
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83 | * @template T
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84 | * @typedef {T extends infer U ? U : CustomOptions} InferDefaultType
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85 | */
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86 |
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87 | /**
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88 | * @typedef {Object} PredefinedOptions
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89 | * @property {boolean} [module]
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90 | * @property {TerserECMA} [ecma]
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91 | */
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92 |
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93 | /**
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94 | * @template T
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95 | * @typedef {PredefinedOptions & InferDefaultType<T>} MinimizerOptions
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96 | */
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97 |
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98 | /**
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99 | * @template T
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100 | * @callback BasicMinimizerImplementation
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101 | * @param {Input} input
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102 | * @param {SourceMapInput | undefined} sourceMap
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103 | * @param {MinimizerOptions<T>} minifyOptions
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104 | * @param {ExtractCommentsOptions | undefined} extractComments
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105 | * @returns {Promise<MinimizedResult>}
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106 | */
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107 |
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108 | /**
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109 | * @typedef {object} MinimizeFunctionHelpers
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110 | * @property {() => string | undefined} [getMinimizerVersion]
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111 | */
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112 |
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113 | /**
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114 | * @template T
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115 | * @typedef {BasicMinimizerImplementation<T> & MinimizeFunctionHelpers} MinimizerImplementation
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116 | */
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117 |
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118 | /**
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119 | * @template T
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120 | * @typedef {Object} InternalOptions
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121 | * @property {string} name
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122 | * @property {string} input
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123 | * @property {SourceMapInput | undefined} inputSourceMap
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124 | * @property {ExtractCommentsOptions | undefined} extractComments
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125 | * @property {{ implementation: MinimizerImplementation<T>, options: MinimizerOptions<T> }} minimizer
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126 | */
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127 |
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128 | /**
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129 | * @template T
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130 | * @typedef {JestWorker & { transform: (options: string) => MinimizedResult, minify: (options: InternalOptions<T>) => MinimizedResult }} MinimizerWorker
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131 | */
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132 |
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133 | /**
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134 | * @typedef {undefined | boolean | number} Parallel
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135 | */
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136 |
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137 | /**
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138 | * @typedef {Object} BasePluginOptions
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139 | * @property {Rules} [test]
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140 | * @property {Rules} [include]
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141 | * @property {Rules} [exclude]
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142 | * @property {ExtractCommentsOptions} [extractComments]
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143 | * @property {Parallel} [parallel]
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144 | */
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145 |
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146 | /**
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147 | * @template T
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148 | * @typedef {T extends TerserOptions ? { minify?: MinimizerImplementation<T> | undefined, terserOptions?: MinimizerOptions<T> | undefined } : { minify: MinimizerImplementation<T>, terserOptions?: MinimizerOptions<T> | undefined }} DefinedDefaultMinimizerAndOptions
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149 | */
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150 |
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151 | /**
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152 | * @template T
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153 | * @typedef {BasePluginOptions & { minimizer: { implementation: MinimizerImplementation<T>, options: MinimizerOptions<T> } }} InternalPluginOptions
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154 | */
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155 |
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156 | const getTraceMapping = memoize(() =>
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157 | // eslint-disable-next-line global-require
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158 | require("@jridgewell/trace-mapping"));
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159 | const getSerializeJavascript = memoize(() =>
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160 | // eslint-disable-next-line global-require
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161 | require("serialize-javascript"));
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162 |
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163 | /**
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164 | * @template [T=TerserOptions]
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165 | */
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166 | class TerserPlugin {
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167 | /**
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168 | * @param {BasePluginOptions & DefinedDefaultMinimizerAndOptions<T>} [options]
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169 | */
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170 | constructor(options) {
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171 | validate( /** @type {Schema} */schema, options || {}, {
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172 | name: "Terser Plugin",
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173 | baseDataPath: "options"
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174 | });
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175 |
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176 | // TODO make `minimizer` option instead `minify` and `terserOptions` in the next major release, also rename `terserMinify` to `terserMinimize`
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177 | const {
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178 | minify = ( /** @type {MinimizerImplementation<T>} */terserMinify),
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179 | terserOptions = ( /** @type {MinimizerOptions<T>} */{}),
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180 | test = /\.[cm]?js(\?.*)?$/i,
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181 | extractComments = true,
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182 | parallel = true,
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183 | include,
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184 | exclude
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185 | } = options || {};
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186 |
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187 | /**
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188 | * @private
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189 | * @type {InternalPluginOptions<T>}
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190 | */
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191 | this.options = {
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192 | test,
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193 | extractComments,
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194 | parallel,
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195 | include,
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196 | exclude,
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197 | minimizer: {
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198 | implementation: minify,
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199 | options: terserOptions
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200 | }
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201 | };
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202 | }
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203 |
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204 | /**
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205 | * @private
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206 | * @param {any} input
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207 | * @returns {boolean}
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208 | */
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209 | static isSourceMap(input) {
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210 | // All required options for `new TraceMap(...options)`
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211 | // https://github.com/jridgewell/trace-mapping#usage
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212 | return Boolean(input && input.version && input.sources && Array.isArray(input.sources) && typeof input.mappings === "string");
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213 | }
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214 |
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215 | /**
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216 | * @private
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217 | * @param {unknown} warning
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218 | * @param {string} file
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219 | * @returns {Error}
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220 | */
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221 | static buildWarning(warning, file) {
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222 | /**
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223 | * @type {Error & { hideStack: true, file: string }}
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224 | */
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225 | // @ts-ignore
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226 | const builtWarning = new Error(warning.toString());
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227 | builtWarning.name = "Warning";
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228 | builtWarning.hideStack = true;
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229 | builtWarning.file = file;
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230 | return builtWarning;
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231 | }
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232 |
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233 | /**
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234 | * @private
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235 | * @param {any} error
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236 | * @param {string} file
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237 | * @param {TraceMap} [sourceMap]
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238 | * @param {Compilation["requestShortener"]} [requestShortener]
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239 | * @returns {Error}
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240 | */
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241 | static buildError(error, file, sourceMap, requestShortener) {
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242 | /**
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243 | * @type {Error & { file?: string }}
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244 | */
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245 | let builtError;
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246 | if (typeof error === "string") {
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247 | builtError = new Error(`${file} from Terser plugin\n${error}`);
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248 | builtError.file = file;
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249 | return builtError;
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250 | }
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251 | if (error.line) {
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252 | const original = sourceMap && getTraceMapping().originalPositionFor(sourceMap, {
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253 | line: error.line,
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254 | column: error.col
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255 | });
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256 | if (original && original.source && requestShortener) {
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257 | builtError = new Error(`${file} from Terser plugin\n${error.message} [${requestShortener.shorten(original.source)}:${original.line},${original.column}][${file}:${error.line},${error.col}]${error.stack ? `\n${error.stack.split("\n").slice(1).join("\n")}` : ""}`);
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258 | builtError.file = file;
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259 | return builtError;
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260 | }
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261 | builtError = new Error(`${file} from Terser plugin\n${error.message} [${file}:${error.line},${error.col}]${error.stack ? `\n${error.stack.split("\n").slice(1).join("\n")}` : ""}`);
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262 | builtError.file = file;
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263 | return builtError;
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264 | }
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265 | if (error.stack) {
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266 | builtError = new Error(`${file} from Terser plugin\n${typeof error.message !== "undefined" ? error.message : ""}\n${error.stack}`);
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267 | builtError.file = file;
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268 | return builtError;
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269 | }
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270 | builtError = new Error(`${file} from Terser plugin\n${error.message}`);
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271 | builtError.file = file;
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272 | return builtError;
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273 | }
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274 |
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275 | /**
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276 | * @private
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277 | * @param {Parallel} parallel
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278 | * @returns {number}
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279 | */
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280 | static getAvailableNumberOfCores(parallel) {
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281 | // In some cases cpus() returns undefined
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282 | // https://github.com/nodejs/node/issues/19022
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283 | const cpus = os.cpus() || {
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284 | length: 1
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285 | };
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286 | return parallel === true ? cpus.length - 1 : Math.min(Number(parallel) || 0, cpus.length - 1);
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287 | }
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288 |
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289 | /**
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290 | * @private
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291 | * @param {Compiler} compiler
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292 | * @param {Compilation} compilation
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293 | * @param {Record<string, import("webpack").sources.Source>} assets
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294 | * @param {{availableNumberOfCores: number}} optimizeOptions
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295 | * @returns {Promise<void>}
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296 | */
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297 | async optimize(compiler, compilation, assets, optimizeOptions) {
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298 | const cache = compilation.getCache("TerserWebpackPlugin");
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299 | let numberOfAssets = 0;
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300 | const assetsForMinify = await Promise.all(Object.keys(assets).filter(name => {
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301 | const {
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302 | info
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303 | } = /** @type {Asset} */compilation.getAsset(name);
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304 | if (
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305 | // Skip double minimize assets from child compilation
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306 | info.minimized ||
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307 | // Skip minimizing for extracted comments assets
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308 | info.extractedComments) {
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309 | return false;
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310 | }
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311 | if (!compiler.webpack.ModuleFilenameHelpers.matchObject.bind(
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312 | // eslint-disable-next-line no-undefined
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313 | undefined, this.options)(name)) {
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314 | return false;
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315 | }
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316 | return true;
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317 | }).map(async name => {
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318 | const {
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319 | info,
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320 | source
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321 | } = /** @type {Asset} */
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322 | compilation.getAsset(name);
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323 | const eTag = cache.getLazyHashedEtag(source);
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324 | const cacheItem = cache.getItemCache(name, eTag);
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325 | const output = await cacheItem.getPromise();
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326 | if (!output) {
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327 | numberOfAssets += 1;
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328 | }
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329 | return {
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330 | name,
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331 | info,
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332 | inputSource: source,
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333 | output,
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334 | cacheItem
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335 | };
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336 | }));
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337 | if (assetsForMinify.length === 0) {
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338 | return;
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339 | }
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340 |
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341 | /** @type {undefined | (() => MinimizerWorker<T>)} */
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342 | let getWorker;
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343 | /** @type {undefined | MinimizerWorker<T>} */
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344 | let initializedWorker;
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345 | /** @type {undefined | number} */
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346 | let numberOfWorkers;
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347 | if (optimizeOptions.availableNumberOfCores > 0) {
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348 | // Do not create unnecessary workers when the number of files is less than the available cores, it saves memory
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349 | numberOfWorkers = Math.min(numberOfAssets, optimizeOptions.availableNumberOfCores);
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350 | // eslint-disable-next-line consistent-return
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351 | getWorker = () => {
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352 | if (initializedWorker) {
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353 | return initializedWorker;
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354 | }
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355 |
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356 | // eslint-disable-next-line global-require
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357 | const {
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358 | Worker
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359 | } = require("jest-worker");
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360 | initializedWorker = /** @type {MinimizerWorker<T>} */
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361 |
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362 | new Worker(require.resolve("./minify"), {
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363 | numWorkers: numberOfWorkers,
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364 | enableWorkerThreads: true
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365 | });
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366 |
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367 | // https://github.com/facebook/jest/issues/8872#issuecomment-524822081
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368 | const workerStdout = initializedWorker.getStdout();
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369 | if (workerStdout) {
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370 | workerStdout.on("data", chunk => process.stdout.write(chunk));
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371 | }
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372 | const workerStderr = initializedWorker.getStderr();
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373 | if (workerStderr) {
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374 | workerStderr.on("data", chunk => process.stderr.write(chunk));
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375 | }
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376 | return initializedWorker;
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377 | };
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378 | }
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379 | const {
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380 | SourceMapSource,
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381 | ConcatSource,
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382 | RawSource
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383 | } = compiler.webpack.sources;
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384 |
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385 | /** @typedef {{ extractedCommentsSource : import("webpack").sources.RawSource, commentsFilename: string }} ExtractedCommentsInfo */
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386 | /** @type {Map<string, ExtractedCommentsInfo>} */
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387 | const allExtractedComments = new Map();
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388 | const scheduledTasks = [];
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389 | for (const asset of assetsForMinify) {
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390 | scheduledTasks.push(async () => {
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391 | const {
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392 | name,
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393 | inputSource,
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394 | info,
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395 | cacheItem
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396 | } = asset;
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397 | let {
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398 | output
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399 | } = asset;
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400 | if (!output) {
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401 | let input;
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402 | /** @type {SourceMapInput | undefined} */
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403 | let inputSourceMap;
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404 | const {
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405 | source: sourceFromInputSource,
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406 | map
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407 | } = inputSource.sourceAndMap();
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408 | input = sourceFromInputSource;
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409 | if (map) {
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410 | if (!TerserPlugin.isSourceMap(map)) {
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411 | compilation.warnings.push( /** @type {WebpackError} */
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412 | new Error(`${name} contains invalid source map`));
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413 | } else {
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414 | inputSourceMap = /** @type {SourceMapInput} */map;
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415 | }
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416 | }
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417 | if (Buffer.isBuffer(input)) {
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418 | input = input.toString();
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419 | }
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420 |
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421 | /**
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422 | * @type {InternalOptions<T>}
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423 | */
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424 | const options = {
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425 | name,
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426 | input,
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427 | inputSourceMap,
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428 | minimizer: {
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429 | implementation: this.options.minimizer.implementation,
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430 | // @ts-ignore https://github.com/Microsoft/TypeScript/issues/10727
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431 | options: {
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432 | ...this.options.minimizer.options
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433 | }
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434 | },
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435 | extractComments: this.options.extractComments
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436 | };
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437 | if (typeof options.minimizer.options.module === "undefined") {
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438 | if (typeof info.javascriptModule !== "undefined") {
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439 | options.minimizer.options.module = info.javascriptModule;
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440 | } else if (/\.mjs(\?.*)?$/i.test(name)) {
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441 | options.minimizer.options.module = true;
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442 | } else if (/\.cjs(\?.*)?$/i.test(name)) {
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443 | options.minimizer.options.module = false;
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444 | }
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445 | }
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446 | if (typeof options.minimizer.options.ecma === "undefined") {
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447 | options.minimizer.options.ecma = TerserPlugin.getEcmaVersion(compiler.options.output.environment || {});
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448 | }
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449 | try {
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450 | output = await (getWorker ? getWorker().transform(getSerializeJavascript()(options)) : minify(options));
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451 | } catch (error) {
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452 | const hasSourceMap = inputSourceMap && TerserPlugin.isSourceMap(inputSourceMap);
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453 | compilation.errors.push( /** @type {WebpackError} */
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454 |
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455 | TerserPlugin.buildError(error, name, hasSourceMap ? new (getTraceMapping().TraceMap)( /** @type {SourceMapInput} */inputSourceMap) :
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456 | // eslint-disable-next-line no-undefined
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457 | undefined,
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458 | // eslint-disable-next-line no-undefined
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459 | hasSourceMap ? compilation.requestShortener : undefined));
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460 | return;
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461 | }
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462 | if (typeof output.code === "undefined") {
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463 | compilation.errors.push( /** @type {WebpackError} */
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464 |
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465 | new Error(`${name} from Terser plugin\nMinimizer doesn't return result`));
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466 | return;
|
---|
467 | }
|
---|
468 | if (output.warnings && output.warnings.length > 0) {
|
---|
469 | output.warnings = output.warnings.map(
|
---|
470 | /**
|
---|
471 | * @param {Error | string} item
|
---|
472 | */
|
---|
473 | item => TerserPlugin.buildWarning(item, name));
|
---|
474 | }
|
---|
475 | if (output.errors && output.errors.length > 0) {
|
---|
476 | const hasSourceMap = inputSourceMap && TerserPlugin.isSourceMap(inputSourceMap);
|
---|
477 | output.errors = output.errors.map(
|
---|
478 | /**
|
---|
479 | * @param {Error | string} item
|
---|
480 | */
|
---|
481 | item => TerserPlugin.buildError(item, name, hasSourceMap ? new (getTraceMapping().TraceMap)( /** @type {SourceMapInput} */inputSourceMap) :
|
---|
482 | // eslint-disable-next-line no-undefined
|
---|
483 | undefined,
|
---|
484 | // eslint-disable-next-line no-undefined
|
---|
485 | hasSourceMap ? compilation.requestShortener : undefined));
|
---|
486 | }
|
---|
487 | let shebang;
|
---|
488 | if ( /** @type {ExtractCommentsObject} */
|
---|
489 | this.options.extractComments.banner !== false && output.extractedComments && output.extractedComments.length > 0 && output.code.startsWith("#!")) {
|
---|
490 | const firstNewlinePosition = output.code.indexOf("\n");
|
---|
491 | shebang = output.code.substring(0, firstNewlinePosition);
|
---|
492 | output.code = output.code.substring(firstNewlinePosition + 1);
|
---|
493 | }
|
---|
494 | if (output.map) {
|
---|
495 | output.source = new SourceMapSource(output.code, name, output.map, input, /** @type {SourceMapInput} */inputSourceMap, true);
|
---|
496 | } else {
|
---|
497 | output.source = new RawSource(output.code);
|
---|
498 | }
|
---|
499 | if (output.extractedComments && output.extractedComments.length > 0) {
|
---|
500 | const commentsFilename = /** @type {ExtractCommentsObject} */
|
---|
501 | this.options.extractComments.filename || "[file].LICENSE.txt[query]";
|
---|
502 | let query = "";
|
---|
503 | let filename = name;
|
---|
504 | const querySplit = filename.indexOf("?");
|
---|
505 | if (querySplit >= 0) {
|
---|
506 | query = filename.slice(querySplit);
|
---|
507 | filename = filename.slice(0, querySplit);
|
---|
508 | }
|
---|
509 | const lastSlashIndex = filename.lastIndexOf("/");
|
---|
510 | const basename = lastSlashIndex === -1 ? filename : filename.slice(lastSlashIndex + 1);
|
---|
511 | const data = {
|
---|
512 | filename,
|
---|
513 | basename,
|
---|
514 | query
|
---|
515 | };
|
---|
516 | output.commentsFilename = compilation.getPath(commentsFilename, data);
|
---|
517 | let banner;
|
---|
518 |
|
---|
519 | // Add a banner to the original file
|
---|
520 | if ( /** @type {ExtractCommentsObject} */
|
---|
521 | this.options.extractComments.banner !== false) {
|
---|
522 | banner = /** @type {ExtractCommentsObject} */
|
---|
523 | this.options.extractComments.banner || `For license information please see ${path.relative(path.dirname(name), output.commentsFilename).replace(/\\/g, "/")}`;
|
---|
524 | if (typeof banner === "function") {
|
---|
525 | banner = banner(output.commentsFilename);
|
---|
526 | }
|
---|
527 | if (banner) {
|
---|
528 | output.source = new ConcatSource(shebang ? `${shebang}\n` : "", `/*! ${banner} */\n`, output.source);
|
---|
529 | }
|
---|
530 | }
|
---|
531 | const extractedCommentsString = output.extractedComments.sort().join("\n\n");
|
---|
532 | output.extractedCommentsSource = new RawSource(`${extractedCommentsString}\n`);
|
---|
533 | }
|
---|
534 | await cacheItem.storePromise({
|
---|
535 | source: output.source,
|
---|
536 | errors: output.errors,
|
---|
537 | warnings: output.warnings,
|
---|
538 | commentsFilename: output.commentsFilename,
|
---|
539 | extractedCommentsSource: output.extractedCommentsSource
|
---|
540 | });
|
---|
541 | }
|
---|
542 | if (output.warnings && output.warnings.length > 0) {
|
---|
543 | for (const warning of output.warnings) {
|
---|
544 | compilation.warnings.push( /** @type {WebpackError} */warning);
|
---|
545 | }
|
---|
546 | }
|
---|
547 | if (output.errors && output.errors.length > 0) {
|
---|
548 | for (const error of output.errors) {
|
---|
549 | compilation.errors.push( /** @type {WebpackError} */error);
|
---|
550 | }
|
---|
551 | }
|
---|
552 |
|
---|
553 | /** @type {Record<string, any>} */
|
---|
554 | const newInfo = {
|
---|
555 | minimized: true
|
---|
556 | };
|
---|
557 | const {
|
---|
558 | source,
|
---|
559 | extractedCommentsSource
|
---|
560 | } = output;
|
---|
561 |
|
---|
562 | // Write extracted comments to commentsFilename
|
---|
563 | if (extractedCommentsSource) {
|
---|
564 | const {
|
---|
565 | commentsFilename
|
---|
566 | } = output;
|
---|
567 | newInfo.related = {
|
---|
568 | license: commentsFilename
|
---|
569 | };
|
---|
570 | allExtractedComments.set(name, {
|
---|
571 | extractedCommentsSource,
|
---|
572 | commentsFilename
|
---|
573 | });
|
---|
574 | }
|
---|
575 | compilation.updateAsset(name, source, newInfo);
|
---|
576 | });
|
---|
577 | }
|
---|
578 | const limit = getWorker && numberOfAssets > 0 ? ( /** @type {number} */numberOfWorkers) : scheduledTasks.length;
|
---|
579 | await throttleAll(limit, scheduledTasks);
|
---|
580 | if (initializedWorker) {
|
---|
581 | await initializedWorker.end();
|
---|
582 | }
|
---|
583 |
|
---|
584 | /** @typedef {{ source: import("webpack").sources.Source, commentsFilename: string, from: string }} ExtractedCommentsInfoWIthFrom */
|
---|
585 | await Array.from(allExtractedComments).sort().reduce(
|
---|
586 | /**
|
---|
587 | * @param {Promise<unknown>} previousPromise
|
---|
588 | * @param {[string, ExtractedCommentsInfo]} extractedComments
|
---|
589 | * @returns {Promise<ExtractedCommentsInfoWIthFrom>}
|
---|
590 | */
|
---|
591 | async (previousPromise, [from, value]) => {
|
---|
592 | const previous = /** @type {ExtractedCommentsInfoWIthFrom | undefined} **/
|
---|
593 | await previousPromise;
|
---|
594 | const {
|
---|
595 | commentsFilename,
|
---|
596 | extractedCommentsSource
|
---|
597 | } = value;
|
---|
598 | if (previous && previous.commentsFilename === commentsFilename) {
|
---|
599 | const {
|
---|
600 | from: previousFrom,
|
---|
601 | source: prevSource
|
---|
602 | } = previous;
|
---|
603 | const mergedName = `${previousFrom}|${from}`;
|
---|
604 | const name = `${commentsFilename}|${mergedName}`;
|
---|
605 | const eTag = [prevSource, extractedCommentsSource].map(item => cache.getLazyHashedEtag(item)).reduce((previousValue, currentValue) => cache.mergeEtags(previousValue, currentValue));
|
---|
606 | let source = await cache.getPromise(name, eTag);
|
---|
607 | if (!source) {
|
---|
608 | source = new ConcatSource(Array.from(new Set([... /** @type {string}*/prevSource.source().split("\n\n"), ... /** @type {string}*/extractedCommentsSource.source().split("\n\n")])).join("\n\n"));
|
---|
609 | await cache.storePromise(name, eTag, source);
|
---|
610 | }
|
---|
611 | compilation.updateAsset(commentsFilename, source);
|
---|
612 | return {
|
---|
613 | source,
|
---|
614 | commentsFilename,
|
---|
615 | from: mergedName
|
---|
616 | };
|
---|
617 | }
|
---|
618 | const existingAsset = compilation.getAsset(commentsFilename);
|
---|
619 | if (existingAsset) {
|
---|
620 | return {
|
---|
621 | source: existingAsset.source,
|
---|
622 | commentsFilename,
|
---|
623 | from: commentsFilename
|
---|
624 | };
|
---|
625 | }
|
---|
626 | compilation.emitAsset(commentsFilename, extractedCommentsSource, {
|
---|
627 | extractedComments: true
|
---|
628 | });
|
---|
629 | return {
|
---|
630 | source: extractedCommentsSource,
|
---|
631 | commentsFilename,
|
---|
632 | from
|
---|
633 | };
|
---|
634 | }, /** @type {Promise<unknown>} */Promise.resolve());
|
---|
635 | }
|
---|
636 |
|
---|
637 | /**
|
---|
638 | * @private
|
---|
639 | * @param {any} environment
|
---|
640 | * @returns {TerserECMA}
|
---|
641 | */
|
---|
642 | static getEcmaVersion(environment) {
|
---|
643 | // ES 6th
|
---|
644 | if (environment.arrowFunction || environment.const || environment.destructuring || environment.forOf || environment.module) {
|
---|
645 | return 2015;
|
---|
646 | }
|
---|
647 |
|
---|
648 | // ES 11th
|
---|
649 | if (environment.bigIntLiteral || environment.dynamicImport) {
|
---|
650 | return 2020;
|
---|
651 | }
|
---|
652 | return 5;
|
---|
653 | }
|
---|
654 |
|
---|
655 | /**
|
---|
656 | * @param {Compiler} compiler
|
---|
657 | * @returns {void}
|
---|
658 | */
|
---|
659 | apply(compiler) {
|
---|
660 | const pluginName = this.constructor.name;
|
---|
661 | const availableNumberOfCores = TerserPlugin.getAvailableNumberOfCores(this.options.parallel);
|
---|
662 | compiler.hooks.compilation.tap(pluginName, compilation => {
|
---|
663 | const hooks = compiler.webpack.javascript.JavascriptModulesPlugin.getCompilationHooks(compilation);
|
---|
664 | const data = getSerializeJavascript()({
|
---|
665 | minimizer: typeof this.options.minimizer.implementation.getMinimizerVersion !== "undefined" ? this.options.minimizer.implementation.getMinimizerVersion() || "0.0.0" : "0.0.0",
|
---|
666 | options: this.options.minimizer.options
|
---|
667 | });
|
---|
668 | hooks.chunkHash.tap(pluginName, (chunk, hash) => {
|
---|
669 | hash.update("TerserPlugin");
|
---|
670 | hash.update(data);
|
---|
671 | });
|
---|
672 | compilation.hooks.processAssets.tapPromise({
|
---|
673 | name: pluginName,
|
---|
674 | stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE,
|
---|
675 | additionalAssets: true
|
---|
676 | }, assets => this.optimize(compiler, compilation, assets, {
|
---|
677 | availableNumberOfCores
|
---|
678 | }));
|
---|
679 | compilation.hooks.statsPrinter.tap(pluginName, stats => {
|
---|
680 | stats.hooks.print.for("asset.info.minimized").tap("terser-webpack-plugin", (minimized, {
|
---|
681 | green,
|
---|
682 | formatFlag
|
---|
683 | }) => minimized ? /** @type {Function} */green( /** @type {Function} */formatFlag("minimized")) : "");
|
---|
684 | });
|
---|
685 | });
|
---|
686 | }
|
---|
687 | }
|
---|
688 | TerserPlugin.terserMinify = terserMinify;
|
---|
689 | TerserPlugin.uglifyJsMinify = uglifyJsMinify;
|
---|
690 | TerserPlugin.swcMinify = swcMinify;
|
---|
691 | TerserPlugin.esbuildMinify = esbuildMinify;
|
---|
692 | module.exports = TerserPlugin; |
---|