mirror of https://github.com/webpack/webpack.git
120 lines
3.4 KiB
JavaScript
120 lines
3.4 KiB
JavaScript
/*
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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 {
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evaluateToString,
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expressionIsUnsupported
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} = require("./JavascriptParserHelpers");
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const CachedConstDependency = require("./dependencies/CachedConstDependency");
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const { relative } = require("./util/fs");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("./Compiler")} Compiler */
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/** @typedef {import("./Dependency")} Dependency */
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/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
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/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
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class NodeStuffPlugin {
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constructor(options) {
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this.options = options;
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}
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/**
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* Apply the plugin
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* @param {Compiler} compiler the compiler instance
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* @returns {void}
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*/
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apply(compiler) {
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const options = this.options;
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compiler.hooks.compilation.tap(
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"NodeStuffPlugin",
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(compilation, { normalModuleFactory }) => {
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const handler = (parser, parserOptions) => {
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if (parserOptions.node === false) return;
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let localOptions = options;
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if (parserOptions.node) {
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localOptions = { ...localOptions, ...parserOptions.node };
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}
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const setModuleConstant = (expressionName, fn) => {
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parser.hooks.expression
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.for(expressionName)
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.tap("NodeStuffPlugin", expr => {
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const dep = new CachedConstDependency(
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JSON.stringify(fn(parser.state.module)),
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expr.range,
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expressionName
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);
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dep.loc = expr.loc;
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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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const setConstant = (expressionName, value) =>
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setModuleConstant(expressionName, () => value);
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const context = compiler.context;
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if (localOptions.__filename) {
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if (localOptions.__filename === "mock") {
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setConstant("__filename", "/index.js");
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} else {
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setModuleConstant("__filename", module =>
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relative(compiler.inputFileSystem, context, module.resource)
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);
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}
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parser.hooks.evaluateIdentifier
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.for("__filename")
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.tap("NodeStuffPlugin", expr => {
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if (!parser.state.module) return;
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const resource = parser.state.module.resource;
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const i = resource.indexOf("?");
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return evaluateToString(
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i < 0 ? resource : resource.substr(0, i)
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)(expr);
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});
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}
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if (localOptions.__dirname) {
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if (localOptions.__dirname === "mock") {
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setConstant("__dirname", "/");
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} else {
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setModuleConstant("__dirname", module =>
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relative(compiler.inputFileSystem, context, module.context)
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);
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}
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parser.hooks.evaluateIdentifier
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.for("__dirname")
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.tap("NodeStuffPlugin", expr => {
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if (!parser.state.module) return;
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return evaluateToString(parser.state.module.context)(expr);
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});
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}
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parser.hooks.expression
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.for("require.extensions")
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.tap(
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"NodeStuffPlugin",
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expressionIsUnsupported(
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parser,
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"require.extensions is not supported by webpack. Use a loader instead."
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)
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);
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};
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normalModuleFactory.hooks.parser
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.for("javascript/auto")
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.tap("NodeStuffPlugin", handler);
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normalModuleFactory.hooks.parser
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.for("javascript/dynamic")
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.tap("NodeStuffPlugin", handler);
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}
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);
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}
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}
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module.exports = NodeStuffPlugin;
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