CommonJsDependencyHelpers.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
/** @typedef {import("../Module")} Module */
/** @typedef {"exports" | "module.exports" | "this" | "Object.defineProperty(exports)" | "Object.defineProperty(module.exports)" | "Object.defineProperty(this)"} CommonJSDependencyBaseKeywords */
/**
* @param {CommonJSDependencyBaseKeywords} depBase commonjs dependency base
* @param {Module} module module
* @param {Set<string>} runtimeRequirements runtime requirements
* @returns {[string, string]} type and base
*/
exports.handleDependencyBase = (depBase, module, runtimeRequirements) => {
let base = undefined;
let type;
switch (depBase) {
case "exports":
runtimeRequirements.add(RuntimeGlobals.exports);
base = module.exportsArgument;
type = "expression";
break;
case "module.exports":
runtimeRequirements.add(RuntimeGlobals.module);
base = `${module.moduleArgument}.exports`;
type = "expression";
break;
case "this":
runtimeRequirements.add(RuntimeGlobals.thisAsExports);
base = "this";
type = "expression";
break;
case "Object.defineProperty(exports)":
runtimeRequirements.add(RuntimeGlobals.exports);
base = module.exportsArgument;
type = "Object.defineProperty";
break;
case "Object.defineProperty(module.exports)":
runtimeRequirements.add(RuntimeGlobals.module);
base = `${module.moduleArgument}.exports`;
type = "Object.defineProperty";
break;
case "Object.defineProperty(this)":
runtimeRequirements.add(RuntimeGlobals.thisAsExports);
base = "this";
type = "Object.defineProperty";
break;
default:
throw new Error(`Unsupported base ${depBase}`);
}
return [type, base];
};