/* MIT License http://www.opensource.org/licenses/mit-license.php Author Tobias Koppers @sokra */ "use strict"; const NodeStuffInWebError = require("./NodeStuffInWebError"); const RuntimeGlobals = require("./RuntimeGlobals"); const CachedConstDependency = require("./dependencies/CachedConstDependency"); const ConstDependency = require("./dependencies/ConstDependency"); const { evaluateToString, expressionIsUnsupported } = require("./javascript/JavascriptParserHelpers"); const { relative } = require("./util/fs"); const { parseResource } = require("./util/identifier"); /** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */ /** @typedef {import("./Compiler")} Compiler */ /** @typedef {import("./Dependency")} Dependency */ /** @typedef {import("./DependencyTemplates")} DependencyTemplates */ /** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */ class NodeStuffPlugin { constructor(options) { this.options = options; } /** * Apply the plugin * @param {Compiler} compiler the compiler instance * @returns {void} */ apply(compiler) { const options = this.options; compiler.hooks.compilation.tap( "NodeStuffPlugin", (compilation, { normalModuleFactory }) => { const handler = (parser, parserOptions) => { if (parserOptions.node === false) return; let localOptions = options; if (parserOptions.node) { localOptions = { ...localOptions, ...parserOptions.node }; } if (localOptions.global !== false) { const withWarning = localOptions.global === "warn"; parser.hooks.expression .for("global") .tap("NodeStuffPlugin", expr => { const dep = new ConstDependency( RuntimeGlobals.global, expr.range, [RuntimeGlobals.global] ); dep.loc = expr.loc; parser.state.module.addPresentationalDependency(dep); // TODO webpack 6 remove if (withWarning) { parser.state.module.addWarning( new NodeStuffInWebError( dep.loc, "global", "The global namespace object is Node.js feature and doesn't present in browser." ) ); } }); parser.hooks.rename.for("global").tap("NodeStuffPlugin", expr => { const dep = new ConstDependency( RuntimeGlobals.global, expr.range, [RuntimeGlobals.global] ); dep.loc = expr.loc; parser.state.module.addPresentationalDependency(dep); return false; }); } const setModuleConstant = (expressionName, fn, warning) => { parser.hooks.expression .for(expressionName) .tap("NodeStuffPlugin", expr => { const dep = new CachedConstDependency( JSON.stringify(fn(parser.state.module)), expr.range, expressionName ); dep.loc = expr.loc; parser.state.module.addPresentationalDependency(dep); // TODO webpack 6 remove if (warning) { parser.state.module.addWarning( new NodeStuffInWebError(dep.loc, expressionName, warning) ); } return true; }); }; const setConstant = (expressionName, value, warning) => setModuleConstant(expressionName, () => value, warning); const context = compiler.context; if (localOptions.__filename) { switch (localOptions.__filename) { case "mock": setConstant("__filename", "/index.js"); break; case "warn-mock": setConstant( "__filename", "/index.js", "The __filename is Node.js feature and doesn't present in browser." ); break; case true: setModuleConstant("__filename", module => relative(compiler.inputFileSystem, context, module.resource) ); break; } parser.hooks.evaluateIdentifier .for("__filename") .tap("NodeStuffPlugin", expr => { if (!parser.state.module) return; const resource = parseResource(parser.state.module.resource); return evaluateToString(resource.path)(expr); }); } if (localOptions.__dirname) { switch (localOptions.__dirname) { case "mock": setConstant("__dirname", "/"); break; case "warn-mock": setConstant( "__dirname", "/", "The __dirname is Node.js feature and doesn't present in browser." ); break; case true: setModuleConstant("__dirname", module => relative(compiler.inputFileSystem, context, module.context) ); break; } parser.hooks.evaluateIdentifier .for("__dirname") .tap("NodeStuffPlugin", expr => { if (!parser.state.module) return; return evaluateToString(parser.state.module.context)(expr); }); } parser.hooks.expression .for("require.extensions") .tap( "NodeStuffPlugin", expressionIsUnsupported( parser, "require.extensions is not supported by webpack. Use a loader instead." ) ); }; normalModuleFactory.hooks.parser .for("javascript/auto") .tap("NodeStuffPlugin", handler); normalModuleFactory.hooks.parser .for("javascript/dynamic") .tap("NodeStuffPlugin", handler); } ); } } module.exports = NodeStuffPlugin;