/* MIT License http://www.opensource.org/licenses/mit-license.php Author Tobias Koppers @sokra */ "use strict"; const { fileURLToPath } = require("url"); const CommentCompilationWarning = require("../CommentCompilationWarning"); const RuntimeGlobals = require("../RuntimeGlobals"); const UnsupportedFeatureWarning = require("../UnsupportedFeatureWarning"); const WebpackError = require("../WebpackError"); const BasicEvaluatedExpression = require("../javascript/BasicEvaluatedExpression"); const { evaluateToIdentifier, evaluateToString, expressionIsUnsupported, toConstantDependency } = require("../javascript/JavascriptParserHelpers"); const CommonJsFullRequireDependency = require("./CommonJsFullRequireDependency"); const CommonJsRequireContextDependency = require("./CommonJsRequireContextDependency"); const CommonJsRequireDependency = require("./CommonJsRequireDependency"); const ConstDependency = require("./ConstDependency"); const ContextDependencyHelpers = require("./ContextDependencyHelpers"); const LocalModuleDependency = require("./LocalModuleDependency"); const { getLocalModule } = require("./LocalModulesHelpers"); const RequireHeaderDependency = require("./RequireHeaderDependency"); const RequireResolveContextDependency = require("./RequireResolveContextDependency"); const RequireResolveDependency = require("./RequireResolveDependency"); const RequireResolveHeaderDependency = require("./RequireResolveHeaderDependency"); /** @typedef {import("estree").CallExpression} CallExpression */ /** @typedef {import("estree").Expression} Expression */ /** @typedef {import("estree").NewExpression} NewExpression */ /** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */ /** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */ /** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */ /** @typedef {import("../javascript/JavascriptParser").ImportSource} ImportSource */ /** @typedef {import("../javascript/JavascriptParser").Range} Range */ const createRequireSpecifierTag = Symbol("createRequire"); const createdRequireIdentifierTag = Symbol("createRequire()"); class CommonJsImportsParserPlugin { /** * @param {JavascriptParserOptions} options parser options */ constructor(options) { this.options = options; } /** * @param {JavascriptParser} parser the parser * @returns {void} */ apply(parser) { const options = this.options; const getContext = () => { if (parser.currentTagData) { const { context } = parser.currentTagData; return context; } }; //#region metadata /** * @param {TODO} expression expression * @param {() => string[]} getMembers get members */ const tapRequireExpression = (expression, getMembers) => { parser.hooks.typeof .for(expression) .tap( "CommonJsImportsParserPlugin", toConstantDependency(parser, JSON.stringify("function")) ); parser.hooks.evaluateTypeof .for(expression) .tap("CommonJsImportsParserPlugin", evaluateToString("function")); parser.hooks.evaluateIdentifier .for(expression) .tap( "CommonJsImportsParserPlugin", evaluateToIdentifier(expression, "require", getMembers, true) ); }; /** * @param {string | symbol} tag tag */ const tapRequireExpressionTag = tag => { parser.hooks.typeof .for(tag) .tap( "CommonJsImportsParserPlugin", toConstantDependency(parser, JSON.stringify("function")) ); parser.hooks.evaluateTypeof .for(tag) .tap("CommonJsImportsParserPlugin", evaluateToString("function")); }; tapRequireExpression("require", () => []); tapRequireExpression("require.resolve", () => ["resolve"]); tapRequireExpression("require.resolveWeak", () => ["resolveWeak"]); //#endregion // Weird stuff // parser.hooks.assign .for("require") .tap("CommonJsImportsParserPlugin", expr => { // to not leak to global "require", we need to define a local require here. const dep = new ConstDependency("var require;", 0); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); return true; }); //#region Unsupported parser.hooks.expression .for("require.main") .tap( "CommonJsImportsParserPlugin", expressionIsUnsupported( parser, "require.main is not supported by webpack." ) ); parser.hooks.call .for("require.main.require") .tap( "CommonJsImportsParserPlugin", expressionIsUnsupported( parser, "require.main.require is not supported by webpack." ) ); parser.hooks.expression .for("module.parent.require") .tap( "CommonJsImportsParserPlugin", expressionIsUnsupported( parser, "module.parent.require is not supported by webpack." ) ); parser.hooks.call .for("module.parent.require") .tap( "CommonJsImportsParserPlugin", expressionIsUnsupported( parser, "module.parent.require is not supported by webpack." ) ); //#endregion //#region Renaming /** * @param {Expression} expr expression * @returns {boolean} true when set undefined */ const defineUndefined = expr => { // To avoid "not defined" error, replace the value with undefined const dep = new ConstDependency( "undefined", /** @type {Range} */ (expr.range) ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); return false; }; parser.hooks.canRename .for("require") .tap("CommonJsImportsParserPlugin", () => true); parser.hooks.rename .for("require") .tap("CommonJsImportsParserPlugin", defineUndefined); //#endregion //#region Inspection const requireCache = toConstantDependency( parser, RuntimeGlobals.moduleCache, [ RuntimeGlobals.moduleCache, RuntimeGlobals.moduleId, RuntimeGlobals.moduleLoaded ] ); parser.hooks.expression .for("require.cache") .tap("CommonJsImportsParserPlugin", requireCache); //#endregion //#region Require as expression /** * @param {Expression} expr expression * @returns {boolean} true when handled */ const requireAsExpressionHandler = expr => { const dep = new CommonJsRequireContextDependency( { request: options.unknownContextRequest, recursive: options.unknownContextRecursive, regExp: options.unknownContextRegExp, mode: "sync" }, /** @type {Range} */ (expr.range), undefined, parser.scope.inShorthand, getContext() ); dep.critical = options.unknownContextCritical && "require function is used in a way in which dependencies cannot be statically extracted"; dep.loc = /** @type {DependencyLocation} */ (expr.loc); dep.optional = !!parser.scope.inTry; parser.state.current.addDependency(dep); return true; }; parser.hooks.expression .for("require") .tap("CommonJsImportsParserPlugin", requireAsExpressionHandler); //#endregion //#region Require /** * @param {CallExpression | NewExpression} expr expression * @param {BasicEvaluatedExpression} param param * @returns {boolean | void} true when handled */ const processRequireItem = (expr, param) => { if (param.isString()) { const dep = new CommonJsRequireDependency( /** @type {string} */ (param.string), /** @type {Range} */ (param.range), getContext() ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); dep.optional = !!parser.scope.inTry; parser.state.current.addDependency(dep); return true; } }; /** * @param {CallExpression | NewExpression} expr expression * @param {BasicEvaluatedExpression} param param * @returns {boolean | void} true when handled */ const processRequireContext = (expr, param) => { const dep = ContextDependencyHelpers.create( CommonJsRequireContextDependency, /** @type {Range} */ (expr.range), param, expr, options, { category: "commonjs" }, parser, undefined, getContext() ); if (!dep) return; dep.loc = /** @type {DependencyLocation} */ (expr.loc); dep.optional = !!parser.scope.inTry; parser.state.current.addDependency(dep); return true; }; /** * @param {boolean} callNew true, when require is called with new * @returns {(expr: CallExpression | NewExpression) => (boolean | void)} handler */ const createRequireHandler = callNew => expr => { if (options.commonjsMagicComments) { const { options: requireOptions, errors: commentErrors } = parser.parseCommentOptions(/** @type {Range} */ (expr.range)); if (commentErrors) { for (const e of commentErrors) { const { comment } = e; parser.state.module.addWarning( new CommentCompilationWarning( `Compilation error while processing magic comment(-s): /*${comment.value}*/: ${e.message}`, comment.loc ) ); } } if (requireOptions) { if (requireOptions.webpackIgnore !== undefined) { if (typeof requireOptions.webpackIgnore !== "boolean") { parser.state.module.addWarning( new UnsupportedFeatureWarning( `\`webpackIgnore\` expected a boolean, but received: ${requireOptions.webpackIgnore}.`, /** @type {DependencyLocation} */ (expr.loc) ) ); } else { // Do not instrument `require()` if `webpackIgnore` is `true` if (requireOptions.webpackIgnore) { return true; } } } } } if (expr.arguments.length !== 1) return; let localModule; const param = parser.evaluateExpression(expr.arguments[0]); if (param.isConditional()) { let isExpression = false; for (const p of /** @type {BasicEvaluatedExpression[]} */ ( param.options )) { const result = processRequireItem(expr, p); if (result === undefined) { isExpression = true; } } if (!isExpression) { const dep = new RequireHeaderDependency( /** @type {Range} */ (expr.callee.range) ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); return true; } } if ( param.isString() && (localModule = getLocalModule( parser.state, /** @type {string} */ (param.string) )) ) { localModule.flagUsed(); const dep = new LocalModuleDependency( localModule, /** @type {Range} */ (expr.range), callNew ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); return true; } else { const result = processRequireItem(expr, param); if (result === undefined) { processRequireContext(expr, param); } else { const dep = new RequireHeaderDependency( /** @type {Range} */ (expr.callee.range) ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); } return true; } }; parser.hooks.call .for("require") .tap("CommonJsImportsParserPlugin", createRequireHandler(false)); parser.hooks.new .for("require") .tap("CommonJsImportsParserPlugin", createRequireHandler(true)); parser.hooks.call .for("module.require") .tap("CommonJsImportsParserPlugin", createRequireHandler(false)); parser.hooks.new .for("module.require") .tap("CommonJsImportsParserPlugin", createRequireHandler(true)); //#endregion //#region Require with property access /** * @param {Expression} expr expression * @param {string[]} calleeMembers callee members * @param {CallExpression} callExpr call expression * @param {string[]} members members * @param {Range[]} memberRanges member ranges * @returns {boolean | void} true when handled */ const chainHandler = ( expr, calleeMembers, callExpr, members, memberRanges ) => { if (callExpr.arguments.length !== 1) return; const param = parser.evaluateExpression(callExpr.arguments[0]); if ( param.isString() && !getLocalModule(parser.state, /** @type {string} */ (param.string)) ) { const dep = new CommonJsFullRequireDependency( /** @type {string} */ (param.string), /** @type {Range} */ (expr.range), members, /** @type {Range[]} */ memberRanges ); dep.asiSafe = !parser.isAsiPosition( /** @type {Range} */ (expr.range)[0] ); dep.optional = !!parser.scope.inTry; dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.current.addDependency(dep); return true; } }; /** * @param {CallExpression} expr expression * @param {string[]} calleeMembers callee members * @param {CallExpression} callExpr call expression * @param {string[]} members members * @param {Range[]} memberRanges member ranges * @returns {boolean | void} true when handled */ const callChainHandler = ( expr, calleeMembers, callExpr, members, memberRanges ) => { if (callExpr.arguments.length !== 1) return; const param = parser.evaluateExpression(callExpr.arguments[0]); if ( param.isString() && !getLocalModule(parser.state, /** @type {string} */ (param.string)) ) { const dep = new CommonJsFullRequireDependency( /** @type {string} */ (param.string), /** @type {Range} */ (expr.callee.range), members, /** @type {Range[]} */ memberRanges ); dep.call = true; dep.asiSafe = !parser.isAsiPosition( /** @type {Range} */ (expr.range)[0] ); dep.optional = !!parser.scope.inTry; dep.loc = /** @type {DependencyLocation} */ (expr.callee.loc); parser.state.current.addDependency(dep); parser.walkExpressions(expr.arguments); return true; } }; parser.hooks.memberChainOfCallMemberChain .for("require") .tap("CommonJsImportsParserPlugin", chainHandler); parser.hooks.memberChainOfCallMemberChain .for("module.require") .tap("CommonJsImportsParserPlugin", chainHandler); parser.hooks.callMemberChainOfCallMemberChain .for("require") .tap("CommonJsImportsParserPlugin", callChainHandler); parser.hooks.callMemberChainOfCallMemberChain .for("module.require") .tap("CommonJsImportsParserPlugin", callChainHandler); //#endregion //#region Require.resolve /** * @param {CallExpression} expr call expression * @param {boolean} weak weak * @returns {boolean | void} true when handled */ const processResolve = (expr, weak) => { if (expr.arguments.length !== 1) return; const param = parser.evaluateExpression(expr.arguments[0]); if (param.isConditional()) { for (const option of /** @type {BasicEvaluatedExpression[]} */ ( param.options )) { const result = processResolveItem(expr, option, weak); if (result === undefined) { processResolveContext(expr, option, weak); } } const dep = new RequireResolveHeaderDependency( /** @type {Range} */ (expr.callee.range) ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); return true; } else { const result = processResolveItem(expr, param, weak); if (result === undefined) { processResolveContext(expr, param, weak); } const dep = new RequireResolveHeaderDependency( /** @type {Range} */ (expr.callee.range) ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(dep); return true; } }; /** * @param {CallExpression} expr call expression * @param {BasicEvaluatedExpression} param param * @param {boolean} weak weak * @returns {boolean | void} true when handled */ const processResolveItem = (expr, param, weak) => { if (param.isString()) { const dep = new RequireResolveDependency( /** @type {string} */ (param.string), /** @type {Range} */ (param.range), getContext() ); dep.loc = /** @type {DependencyLocation} */ (expr.loc); dep.optional = !!parser.scope.inTry; dep.weak = weak; parser.state.current.addDependency(dep); return true; } }; /** * @param {CallExpression} expr call expression * @param {BasicEvaluatedExpression} param param * @param {boolean} weak weak * @returns {boolean | void} true when handled */ const processResolveContext = (expr, param, weak) => { const dep = ContextDependencyHelpers.create( RequireResolveContextDependency, /** @type {Range} */ (param.range), param, expr, options, { category: "commonjs", mode: weak ? "weak" : "sync" }, parser, getContext() ); if (!dep) return; dep.loc = /** @type {DependencyLocation} */ (expr.loc); dep.optional = !!parser.scope.inTry; parser.state.current.addDependency(dep); return true; }; parser.hooks.call .for("require.resolve") .tap("CommonJsImportsParserPlugin", expr => { return processResolve(expr, false); }); parser.hooks.call .for("require.resolveWeak") .tap("CommonJsImportsParserPlugin", expr => { return processResolve(expr, true); }); //#endregion //#region Create require if (!options.createRequire) return; /** @type {ImportSource[]} */ let moduleName = []; /** @type {string | undefined} */ let specifierName; if (options.createRequire === true) { moduleName = ["module", "node:module"]; specifierName = "createRequire"; } else { let moduleName; const match = /^(.*) from (.*)$/.exec(options.createRequire); if (match) { [, specifierName, moduleName] = match; } if (!specifierName || !moduleName) { const err = new WebpackError( `Parsing javascript parser option "createRequire" failed, got ${JSON.stringify( options.createRequire )}` ); err.details = 'Expected string in format "createRequire from module", where "createRequire" is specifier name and "module" name of the module'; throw err; } } tapRequireExpressionTag(createdRequireIdentifierTag); tapRequireExpressionTag(createRequireSpecifierTag); parser.hooks.evaluateCallExpression .for(createRequireSpecifierTag) .tap("CommonJsImportsParserPlugin", expr => { const context = parseCreateRequireArguments(expr); if (context === undefined) return; const ident = parser.evaluatedVariable({ tag: createdRequireIdentifierTag, data: { context }, next: undefined }); return new BasicEvaluatedExpression() .setIdentifier( /** @type {TODO} */ (ident), /** @type {TODO} */ (ident), () => [] ) .setSideEffects(false) .setRange(/** @type {Range} */ (expr.range)); }); parser.hooks.unhandledExpressionMemberChain .for(createdRequireIdentifierTag) .tap("CommonJsImportsParserPlugin", (expr, members) => { return expressionIsUnsupported( parser, `createRequire().${members.join(".")} is not supported by webpack.` )(expr); }); parser.hooks.canRename .for(createdRequireIdentifierTag) .tap("CommonJsImportsParserPlugin", () => true); parser.hooks.canRename .for(createRequireSpecifierTag) .tap("CommonJsImportsParserPlugin", () => true); parser.hooks.rename .for(createRequireSpecifierTag) .tap("CommonJsImportsParserPlugin", defineUndefined); parser.hooks.expression .for(createdRequireIdentifierTag) .tap("CommonJsImportsParserPlugin", requireAsExpressionHandler); parser.hooks.call .for(createdRequireIdentifierTag) .tap("CommonJsImportsParserPlugin", createRequireHandler(false)); /** * @param {CallExpression} expr call expression * @returns {string | void} context */ const parseCreateRequireArguments = expr => { const args = expr.arguments; if (args.length !== 1) { const err = new WebpackError( "module.createRequire supports only one argument." ); err.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addWarning(err); return; } const arg = args[0]; const evaluated = parser.evaluateExpression(arg); if (!evaluated.isString()) { const err = new WebpackError( "module.createRequire failed parsing argument." ); err.loc = /** @type {DependencyLocation} */ (arg.loc); parser.state.module.addWarning(err); return; } const ctx = /** @type {string} */ (evaluated.string).startsWith("file://") ? fileURLToPath(/** @type {string} */ (evaluated.string)) : /** @type {string} */ (evaluated.string); // argument always should be a filename return ctx.slice(0, ctx.lastIndexOf(ctx.startsWith("/") ? "/" : "\\")); }; parser.hooks.import.tap( { name: "CommonJsImportsParserPlugin", stage: -10 }, (statement, source) => { if ( !moduleName.includes(source) || statement.specifiers.length !== 1 || statement.specifiers[0].type !== "ImportSpecifier" || statement.specifiers[0].imported.type !== "Identifier" || statement.specifiers[0].imported.name !== specifierName ) return; // clear for 'import { createRequire as x } from "module"' // if any other specifier was used import module const clearDep = new ConstDependency( parser.isAsiPosition(/** @type {Range} */ (statement.range)[0]) ? ";" : "", /** @type {Range} */ (statement.range) ); clearDep.loc = /** @type {DependencyLocation} */ (statement.loc); parser.state.module.addPresentationalDependency(clearDep); parser.unsetAsiPosition(/** @type {Range} */ (statement.range)[1]); return true; } ); parser.hooks.importSpecifier.tap( { name: "CommonJsImportsParserPlugin", stage: -10 }, (statement, source, id, name) => { if (!moduleName.includes(source) || id !== specifierName) return; parser.tagVariable(name, createRequireSpecifierTag); return true; } ); parser.hooks.preDeclarator.tap( "CommonJsImportsParserPlugin", declarator => { if ( declarator.id.type !== "Identifier" || !declarator.init || declarator.init.type !== "CallExpression" || declarator.init.callee.type !== "Identifier" ) return; const variableInfo = /** @type {TODO} */ (parser.getVariableInfo(declarator.init.callee.name)); if ( variableInfo && variableInfo.tagInfo && variableInfo.tagInfo.tag === createRequireSpecifierTag ) { const context = parseCreateRequireArguments(declarator.init); if (context === undefined) return; parser.tagVariable(declarator.id.name, createdRequireIdentifierTag, { name: declarator.id.name, context }); return true; } } ); parser.hooks.memberChainOfCallMemberChain .for(createRequireSpecifierTag) .tap( "CommonJsImportsParserPlugin", (expr, calleeMembers, callExpr, members) => { if ( calleeMembers.length !== 0 || members.length !== 1 || members[0] !== "cache" ) return; // createRequire().cache const context = parseCreateRequireArguments(callExpr); if (context === undefined) return; return requireCache(expr); } ); parser.hooks.callMemberChainOfCallMemberChain .for(createRequireSpecifierTag) .tap( "CommonJsImportsParserPlugin", (expr, calleeMembers, innerCallExpression, members) => { if ( calleeMembers.length !== 0 || members.length !== 1 || members[0] !== "resolve" ) return; // createRequire().resolve() return processResolve(expr, false); } ); parser.hooks.expressionMemberChain .for(createdRequireIdentifierTag) .tap("CommonJsImportsParserPlugin", (expr, members) => { // require.cache if (members.length === 1 && members[0] === "cache") { return requireCache(expr); } }); parser.hooks.callMemberChain .for(createdRequireIdentifierTag) .tap("CommonJsImportsParserPlugin", (expr, members) => { // require.resolve() if (members.length === 1 && members[0] === "resolve") { return processResolve(expr, false); } }); parser.hooks.call .for(createRequireSpecifierTag) .tap("CommonJsImportsParserPlugin", expr => { const clearDep = new ConstDependency( "/* createRequire() */ undefined", /** @type {Range} */ (expr.range) ); clearDep.loc = /** @type {DependencyLocation} */ (expr.loc); parser.state.module.addPresentationalDependency(clearDep); return true; }); //#endregion } } module.exports = CommonJsImportsParserPlugin;