256 lines
8.1 KiB
JavaScript
256 lines
8.1 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Ivan Kopeykin @vankop
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*/
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"use strict";
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const { pathToFileURL } = require("url");
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const ModuleDependencyWarning = require("../ModuleDependencyWarning");
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const {
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JAVASCRIPT_MODULE_TYPE_AUTO,
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JAVASCRIPT_MODULE_TYPE_ESM
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} = require("../ModuleTypeConstants");
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const Template = require("../Template");
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const BasicEvaluatedExpression = require("../javascript/BasicEvaluatedExpression");
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const {
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evaluateToIdentifier,
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toConstantDependency,
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evaluateToString,
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evaluateToNumber
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} = require("../javascript/JavascriptParserHelpers");
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const memoize = require("../util/memoize");
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const propertyAccess = require("../util/propertyAccess");
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const ConstDependency = require("./ConstDependency");
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/** @typedef {import("estree").MemberExpression} MemberExpression */
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/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
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/** @typedef {import("../Compiler")} Compiler */
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/** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
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/** @typedef {import("../NormalModule")} NormalModule */
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/** @typedef {import("../javascript/JavascriptParser")} Parser */
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/** @typedef {import("../javascript/JavascriptParser").Range} Range */
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const getCriticalDependencyWarning = memoize(() =>
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require("./CriticalDependencyWarning")
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);
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const PLUGIN_NAME = "ImportMetaPlugin";
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class ImportMetaPlugin {
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/**
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* @param {Compiler} compiler compiler
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*/
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apply(compiler) {
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compiler.hooks.compilation.tap(
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PLUGIN_NAME,
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(compilation, { normalModuleFactory }) => {
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/**
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* @param {NormalModule} module module
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* @returns {string} file url
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*/
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const getUrl = module => {
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return pathToFileURL(module.resource).toString();
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};
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/**
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* @param {Parser} parser parser parser
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* @param {JavascriptParserOptions} parserOptions parserOptions
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* @returns {void}
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*/
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const parserHandler = (parser, { importMeta }) => {
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if (importMeta === false) {
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const { importMetaName } = compilation.outputOptions;
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if (importMetaName === "import.meta") return;
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parser.hooks.expression
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.for("import.meta")
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.tap(PLUGIN_NAME, metaProperty => {
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const dep = new ConstDependency(
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/** @type {string} */ (importMetaName),
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/** @type {Range} */ (metaProperty.range)
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);
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dep.loc = /** @type {DependencyLocation} */ (metaProperty.loc);
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parser.state.module.addPresentationalDependency(dep);
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return true;
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});
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return;
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}
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/// import.meta direct ///
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const webpackVersion = parseInt(
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require("../../package.json").version,
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10
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);
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const importMetaUrl = () =>
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JSON.stringify(getUrl(parser.state.module));
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const importMetaWebpackVersion = () => JSON.stringify(webpackVersion);
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/**
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* @param {string[]} members members
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* @returns {string} error message
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*/
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const importMetaUnknownProperty = members =>
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`${Template.toNormalComment(
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"unsupported import.meta." + members.join(".")
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)} undefined${propertyAccess(members, 1)}`;
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parser.hooks.typeof
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.for("import.meta")
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.tap(
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PLUGIN_NAME,
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toConstantDependency(parser, JSON.stringify("object"))
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);
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parser.hooks.expression
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.for("import.meta")
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.tap(PLUGIN_NAME, metaProperty => {
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const referencedPropertiesInDestructuring =
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parser.destructuringAssignmentPropertiesFor(metaProperty);
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if (!referencedPropertiesInDestructuring) {
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const CriticalDependencyWarning =
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getCriticalDependencyWarning();
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parser.state.module.addWarning(
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new ModuleDependencyWarning(
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parser.state.module,
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new CriticalDependencyWarning(
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"Accessing import.meta directly is unsupported (only property access or destructuring is supported)"
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),
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/** @type {DependencyLocation} */ (metaProperty.loc)
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)
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);
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const dep = new ConstDependency(
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`${
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parser.isAsiPosition(
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/** @type {Range} */ (metaProperty.range)[0]
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)
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? ";"
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: ""
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}({})`,
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/** @type {Range} */ (metaProperty.range)
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);
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dep.loc = /** @type {DependencyLocation} */ (metaProperty.loc);
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parser.state.module.addPresentationalDependency(dep);
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return true;
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}
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let str = "";
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for (const prop of referencedPropertiesInDestructuring) {
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switch (prop) {
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case "url":
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str += `url: ${importMetaUrl()},`;
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break;
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case "webpack":
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str += `webpack: ${importMetaWebpackVersion()},`;
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break;
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default:
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str += `[${JSON.stringify(
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prop
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)}]: ${importMetaUnknownProperty([prop])},`;
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break;
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}
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}
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const dep = new ConstDependency(
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`({${str}})`,
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/** @type {Range} */ (metaProperty.range)
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);
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dep.loc = /** @type {DependencyLocation} */ (metaProperty.loc);
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parser.state.module.addPresentationalDependency(dep);
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return true;
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});
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parser.hooks.evaluateTypeof
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.for("import.meta")
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.tap(PLUGIN_NAME, evaluateToString("object"));
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parser.hooks.evaluateIdentifier.for("import.meta").tap(
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PLUGIN_NAME,
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evaluateToIdentifier("import.meta", "import.meta", () => [], true)
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);
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/// import.meta.url ///
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parser.hooks.typeof
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.for("import.meta.url")
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.tap(
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PLUGIN_NAME,
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toConstantDependency(parser, JSON.stringify("string"))
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);
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parser.hooks.expression
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.for("import.meta.url")
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.tap(PLUGIN_NAME, expr => {
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const dep = new ConstDependency(
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importMetaUrl(),
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/** @type {Range} */ (expr.range)
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);
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dep.loc = /** @type {DependencyLocation} */ (expr.loc);
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parser.state.module.addPresentationalDependency(dep);
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return true;
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});
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parser.hooks.evaluateTypeof
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.for("import.meta.url")
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.tap(PLUGIN_NAME, evaluateToString("string"));
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parser.hooks.evaluateIdentifier
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.for("import.meta.url")
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.tap(PLUGIN_NAME, expr => {
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return new BasicEvaluatedExpression()
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.setString(getUrl(parser.state.module))
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.setRange(/** @type {Range} */ (expr.range));
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});
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/// import.meta.webpack ///
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parser.hooks.typeof
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.for("import.meta.webpack")
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.tap(
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PLUGIN_NAME,
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toConstantDependency(parser, JSON.stringify("number"))
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);
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parser.hooks.expression
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.for("import.meta.webpack")
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.tap(
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PLUGIN_NAME,
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toConstantDependency(parser, importMetaWebpackVersion())
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);
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parser.hooks.evaluateTypeof
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.for("import.meta.webpack")
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.tap(PLUGIN_NAME, evaluateToString("number"));
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parser.hooks.evaluateIdentifier
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.for("import.meta.webpack")
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.tap(PLUGIN_NAME, evaluateToNumber(webpackVersion));
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/// Unknown properties ///
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parser.hooks.unhandledExpressionMemberChain
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.for("import.meta")
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.tap(PLUGIN_NAME, (expr, members) => {
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const dep = new ConstDependency(
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importMetaUnknownProperty(members),
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/** @type {Range} */ (expr.range)
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);
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dep.loc = /** @type {DependencyLocation} */ (expr.loc);
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parser.state.module.addPresentationalDependency(dep);
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return true;
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});
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parser.hooks.evaluate
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.for("MemberExpression")
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.tap(PLUGIN_NAME, expression => {
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const expr = /** @type {MemberExpression} */ (expression);
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if (
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expr.object.type === "MetaProperty" &&
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expr.object.meta.name === "import" &&
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expr.object.property.name === "meta" &&
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expr.property.type ===
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(expr.computed ? "Literal" : "Identifier")
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) {
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return new BasicEvaluatedExpression()
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.setUndefined()
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.setRange(/** @type {Range} */ (expr.range));
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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_MODULE_TYPE_AUTO)
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.tap(PLUGIN_NAME, parserHandler);
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normalModuleFactory.hooks.parser
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.for(JAVASCRIPT_MODULE_TYPE_ESM)
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.tap(PLUGIN_NAME, parserHandler);
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}
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);
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}
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}
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module.exports = ImportMetaPlugin;
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