mirror of https://github.com/webpack/webpack.git
119 lines
3.2 KiB
JavaScript
119 lines
3.2 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 path = require("path");
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const ParserHelpers = require("./ParserHelpers");
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const ConstDependency = require("./dependencies/ConstDependency");
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const NullFactory = require("./NullFactory");
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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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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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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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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 = Object.assign({}, localOptions, parserOptions.node);
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}
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const setConstant = (expressionName, value) => {
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parser.hooks.expression
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.for(expressionName)
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.tap("NodeStuffPlugin", () => {
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parser.state.current.addVariable(
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expressionName,
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JSON.stringify(value)
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);
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return true;
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});
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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", () => {
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parser.state.current.addVariable(
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expressionName,
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JSON.stringify(fn(parser.state.module))
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);
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return true;
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});
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};
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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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path.relative(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 ParserHelpers.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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path.relative(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 ParserHelpers.evaluateToString(
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parser.state.module.context
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)(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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ParserHelpers.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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