/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const ConstDependency = require("./dependencies/ConstDependency");
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const NullFactory = require("./NullFactory");
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/** @typedef {import("./Compiler")} Compiler */
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class CompatibilityPlugin {
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/**
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* Apply the plugin
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* @param {Compiler} compiler Webpack Compiler
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* @returns {void}
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*/
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apply(compiler) {
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compiler.hooks.compilation.tap(
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"CompatibilityPlugin",
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(compilation, { normalModuleFactory }) => {
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compilation.dependencyFactories.set(ConstDependency, new NullFactory());
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compilation.dependencyTemplates.set(
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ConstDependency,
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new ConstDependency.Template()
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);
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normalModuleFactory.hooks.parser
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.for("javascript/auto")
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.tap("CompatibilityPlugin", (parser, parserOptions) => {
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if (
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parserOptions.browserify !== undefined &&
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!parserOptions.browserify
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)
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return;
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parser.hooks.call
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.for("require")
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.tap("CompatibilityPlugin", expr => {
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// support for browserify style require delegator: "require(o, !0)"
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if (expr.arguments.length !== 2) return;
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const second = parser.evaluateExpression(expr.arguments[1]);
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if (!second.isBoolean()) return;
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if (second.asBool() !== true) return;
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const dep = new ConstDependency("require", expr.callee.range);
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dep.loc = expr.loc;
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if (parser.state.current.dependencies.length > 1) {
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const last =
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parser.state.current.dependencies[
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parser.state.current.dependencies.length - 1
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];
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if (
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last.critical &&
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last.options &&
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last.options.request === "." &&
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last.userRequest === "." &&
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last.options.recursive
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)
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parser.state.current.dependencies.pop();
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}
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parser.state.current.addDependency(dep);
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return true;
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});
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});
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}
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);
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}
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}
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module.exports = CompatibilityPlugin;
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