73 lines
2.0 KiB
JavaScript
73 lines
2.0 KiB
JavaScript
/*
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
|
Authors Simen Brekken @simenbrekken, Einar Löve @einarlove
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const DefinePlugin = require("./DefinePlugin");
|
|
const WebpackError = require("./WebpackError");
|
|
|
|
/** @typedef {import("./Compiler")} Compiler */
|
|
|
|
const needsEnvVarFix =
|
|
["8", "9"].indexOf(process.versions.node.split(".")[0]) >= 0 &&
|
|
process.platform === "win32";
|
|
|
|
class EnvironmentPlugin {
|
|
constructor(...keys) {
|
|
if (keys.length === 1 && Array.isArray(keys[0])) {
|
|
this.keys = keys[0];
|
|
this.defaultValues = {};
|
|
} else if (keys.length === 1 && keys[0] && typeof keys[0] === "object") {
|
|
this.keys = Object.keys(keys[0]);
|
|
this.defaultValues = keys[0];
|
|
} else {
|
|
this.keys = keys;
|
|
this.defaultValues = {};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param {Compiler} compiler webpack compiler instance
|
|
* @returns {void}
|
|
*/
|
|
apply(compiler) {
|
|
const definitions = this.keys.reduce((defs, key) => {
|
|
// NOTE remove once the required node version is >=8.10.0.
|
|
// Work around https://github.com/nodejs/node/pull/18463,
|
|
// affecting Node 8 & 9 by performing an OS-level
|
|
// operation that always succeeds before reading
|
|
// environment variables:
|
|
if (needsEnvVarFix) require("os").cpus();
|
|
|
|
const value =
|
|
process.env[key] !== undefined
|
|
? process.env[key]
|
|
: this.defaultValues[key];
|
|
|
|
if (value === undefined) {
|
|
compiler.hooks.thisCompilation.tap("EnvironmentPlugin", compilation => {
|
|
const error = new WebpackError(
|
|
`EnvironmentPlugin - ${key} environment variable is undefined.\n\n` +
|
|
"You can pass an object with default values to suppress this warning.\n" +
|
|
"See https://webpack.js.org/plugins/environment-plugin for example."
|
|
);
|
|
|
|
error.name = "EnvVariableNotDefinedError";
|
|
compilation.warnings.push(error);
|
|
});
|
|
}
|
|
|
|
defs[`process.env.${key}`] =
|
|
value === undefined ? "undefined" : JSON.stringify(value);
|
|
|
|
return defs;
|
|
}, {});
|
|
|
|
new DefinePlugin(definitions).apply(compiler);
|
|
}
|
|
}
|
|
|
|
module.exports = EnvironmentPlugin;
|