node_modules/webpack/lib/EnvironmentPlugin.js

   1 /*
   2         MIT License http://www.opensource.org/licenses/mit-license.php
   3         Authors Simen Brekken @simenbrekken, Einar Löve @einarlove
   4 */
   5
   6 "use strict";
   7
   8 const DefinePlugin = require("./DefinePlugin");
   9 const WebpackError = require("./WebpackError");
  10
  11 /** @typedef {import("./Compiler")} Compiler */
  12 /** @typedef {import("./DefinePlugin").CodeValue} CodeValue */
  13
  14 class EnvironmentPlugin {
  15         constructor(...keys) {
  16                 if (keys.length === 1 && Array.isArray(keys[0])) {
  17                         this.keys = keys[0];
  18                         this.defaultValues = {};
  19                 } else if (keys.length === 1 && keys[0] && typeof keys[0] === "object") {
  20                         this.keys = Object.keys(keys[0]);
  21                         this.defaultValues = keys[0];
  22                 } else {
  23                         this.keys = keys;
  24                         this.defaultValues = {};
  25                 }
  26         }
  27
  28         /**
  29          * Apply the plugin
  30          * @param {Compiler} compiler the compiler instance
  31          * @returns {void}
  32          */
  33         apply(compiler) {
  34                 /** @type {Record<string, CodeValue>} */
  35                 const definitions = {};
  36                 for (const key of this.keys) {
  37                         const value =
  38                                 process.env[key] !== undefined
  39                                         ? process.env[key]
  40                                         : this.defaultValues[key];
  41
  42                         if (value === undefined) {
  43                                 compiler.hooks.thisCompilation.tap("EnvironmentPlugin", compilation => {
  44                                         const error = new WebpackError(
  45                                                 `EnvironmentPlugin - ${key} environment variable is undefined.\n\n` +
  46                                                         "You can pass an object with default values to suppress this warning.\n" +
  47                                                         "See https://webpack.js.org/plugins/environment-plugin for example."
  48                                         );
  49
  50                                         error.name = "EnvVariableNotDefinedError";
  51                                         compilation.errors.push(error);
  52                                 });
  53                         }
  54
  55                         definitions[`process.env.${key}`] =
  56                                 value === undefined ? "undefined" : JSON.stringify(value);
  57                 }
  58
  59                 new DefinePlugin(definitions).apply(compiler);
  60         }
  61 }
  62
  63 module.exports = EnvironmentPlugin;