61 lines
1.8 KiB
JavaScript
61 lines
1.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Authors Simen Brekken @simenbrekken, Einar Löve @einarlove
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*/
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"use strict";
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const DefinePlugin = require("./DefinePlugin");
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const needsEnvVarFix = ["8", "9"].indexOf(process.versions.node.split(".")[0]) >= 0 &&
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process.platform === "win32";
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class EnvironmentPlugin {
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constructor(keys) {
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if(Array.isArray(keys)) {
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this.keys = keys;
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this.defaultValues = {};
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} else if(keys && typeof keys === "object") {
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this.keys = Object.keys(keys);
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this.defaultValues = keys;
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} else {
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this.keys = Array.prototype.slice.call(arguments);
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this.defaultValues = {};
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}
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}
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apply(compiler) {
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const definitions = this.keys.reduce((defs, key) => {
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// TODO remove once the fix has made its way into Node 8.
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// Work around https://github.com/nodejs/node/pull/18463,
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// affecting Node 8 & 9 by performing an OS-level
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// operation that always succeeds before reading
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// environment variables:
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if(needsEnvVarFix) require("os").cpus();
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const value = process.env[key] !== undefined ? process.env[key] : this.defaultValues[key];
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if(value === undefined) {
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compiler.plugin("this-compilation", compilation => {
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const error = new Error(
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`EnvironmentPlugin - ${key} environment variable is undefined.\n\n` +
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"You can pass an object with default values to suppress this warning.\n" +
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"See https://webpack.js.org/plugins/environment-plugin for example."
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);
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error.name = "EnvVariableNotDefinedError";
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compilation.warnings.push(error);
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});
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}
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defs[`process.env.${key}`] = typeof value === "undefined" ? "undefined" : JSON.stringify(value);
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return defs;
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}, {});
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compiler.apply(new DefinePlugin(definitions));
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}
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}
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module.exports = EnvironmentPlugin;
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