mirror of https://github.com/webpack/webpack.git
383 lines
12 KiB
JavaScript
383 lines
12 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 ConditionalInitFragment = require("../ConditionalInitFragment");
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const Dependency = require("../Dependency");
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const HarmonyLinkingError = require("../HarmonyLinkingError");
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const InitFragment = require("../InitFragment");
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const Template = require("../Template");
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const AwaitDependenciesInitFragment = require("../async-modules/AwaitDependenciesInitFragment");
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const { filterRuntime, mergeRuntime } = require("../util/runtime");
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const ModuleDependency = require("./ModuleDependency");
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/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
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/** @typedef {import("webpack-sources").Source} Source */
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/** @typedef {import("../ChunkGraph")} ChunkGraph */
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/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
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/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
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/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
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/** @typedef {import("../ExportsInfo")} ExportsInfo */
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/** @typedef {import("../Module")} Module */
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/** @typedef {import("../Module").BuildMeta} BuildMeta */
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/** @typedef {import("../ModuleGraph")} ModuleGraph */
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/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
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/** @typedef {import("../WebpackError")} WebpackError */
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/** @typedef {import("../javascript/JavascriptParser").ImportAttributes} ImportAttributes */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */
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/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */
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/** @typedef {import("../util/Hash")} Hash */
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/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
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const ExportPresenceModes = {
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NONE: /** @type {0} */ (0),
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WARN: /** @type {1} */ (1),
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AUTO: /** @type {2} */ (2),
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ERROR: /** @type {3} */ (3),
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/**
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* @param {string | false} str param
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* @returns {0 | 1 | 2 | 3} result
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*/
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fromUserOption(str) {
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switch (str) {
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case "error":
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return ExportPresenceModes.ERROR;
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case "warn":
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return ExportPresenceModes.WARN;
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case "auto":
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return ExportPresenceModes.AUTO;
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case false:
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return ExportPresenceModes.NONE;
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default:
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throw new Error(`Invalid export presence value ${str}`);
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}
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}
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};
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class HarmonyImportDependency extends ModuleDependency {
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/**
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* @param {string} request request string
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* @param {number} sourceOrder source order
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* @param {ImportAttributes=} attributes import attributes
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*/
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constructor(request, sourceOrder, attributes) {
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super(request);
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this.sourceOrder = sourceOrder;
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this.assertions = attributes;
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}
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get category() {
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return "esm";
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}
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/**
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* Returns list of exports referenced by this dependency
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* @param {ModuleGraph} moduleGraph module graph
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* @param {RuntimeSpec} runtime the runtime for which the module is analysed
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* @returns {(string[] | ReferencedExport)[]} referenced exports
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*/
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getReferencedExports(moduleGraph, runtime) {
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return Dependency.NO_EXPORTS_REFERENCED;
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}
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/**
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* @param {ModuleGraph} moduleGraph the module graph
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* @returns {string} name of the variable for the import
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*/
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getImportVar(moduleGraph) {
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const module = /** @type {Module} */ (moduleGraph.getParentModule(this));
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const meta = /** @type {TODO} */ (moduleGraph.getMeta(module));
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let importVarMap = meta.importVarMap;
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if (!importVarMap) meta.importVarMap = importVarMap = new Map();
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let importVar = importVarMap.get(
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/** @type {Module} */ (moduleGraph.getModule(this))
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);
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if (importVar) return importVar;
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importVar = `${Template.toIdentifier(
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`${this.userRequest}`
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)}__WEBPACK_IMPORTED_MODULE_${importVarMap.size}__`;
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importVarMap.set(
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/** @type {Module} */ (moduleGraph.getModule(this)),
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importVar
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);
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return importVar;
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}
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/**
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* @param {boolean} update create new variables or update existing one
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* @param {DependencyTemplateContext} templateContext the template context
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* @returns {[string, string]} the import statement and the compat statement
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*/
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getImportStatement(
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update,
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{ runtimeTemplate, module, moduleGraph, chunkGraph, runtimeRequirements }
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) {
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return runtimeTemplate.importStatement({
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update,
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module: /** @type {Module} */ (moduleGraph.getModule(this)),
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chunkGraph,
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importVar: this.getImportVar(moduleGraph),
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request: this.request,
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originModule: module,
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runtimeRequirements
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});
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}
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/**
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* @param {ModuleGraph} moduleGraph module graph
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* @param {string[]} ids imported ids
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* @param {string} additionalMessage extra info included in the error message
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* @returns {WebpackError[] | undefined} errors
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*/
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getLinkingErrors(moduleGraph, ids, additionalMessage) {
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const importedModule = moduleGraph.getModule(this);
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// ignore errors for missing or failed modules
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if (!importedModule || importedModule.getNumberOfErrors() > 0) {
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return;
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}
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const parentModule =
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/** @type {Module} */
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(moduleGraph.getParentModule(this));
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const exportsType = importedModule.getExportsType(
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moduleGraph,
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/** @type {BuildMeta} */ (parentModule.buildMeta).strictHarmonyModule
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);
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if (exportsType === "namespace" || exportsType === "default-with-named") {
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if (ids.length === 0) {
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return;
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}
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if (
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(exportsType !== "default-with-named" || ids[0] !== "default") &&
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moduleGraph.isExportProvided(importedModule, ids) === false
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) {
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// We are sure that it's not provided
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// Try to provide detailed info in the error message
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let pos = 0;
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let exportsInfo = moduleGraph.getExportsInfo(importedModule);
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while (pos < ids.length && exportsInfo) {
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const id = ids[pos++];
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const exportInfo = exportsInfo.getReadOnlyExportInfo(id);
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if (exportInfo.provided === false) {
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// We are sure that it's not provided
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const providedExports = exportsInfo.getProvidedExports();
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const moreInfo = !Array.isArray(providedExports)
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? " (possible exports unknown)"
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: providedExports.length === 0
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? " (module has no exports)"
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: ` (possible exports: ${providedExports.join(", ")})`;
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return [
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new HarmonyLinkingError(
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`export ${ids
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.slice(0, pos)
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.map(id => `'${id}'`)
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.join(".")} ${additionalMessage} was not found in '${
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this.userRequest
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}'${moreInfo}`
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)
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];
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}
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exportsInfo =
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/** @type {ExportsInfo} */
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(exportInfo.getNestedExportsInfo());
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}
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// General error message
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return [
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new HarmonyLinkingError(
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`export ${ids
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.map(id => `'${id}'`)
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.join(".")} ${additionalMessage} was not found in '${
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this.userRequest
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}'`
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)
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];
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}
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}
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switch (exportsType) {
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case "default-only":
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// It's has only a default export
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if (ids.length > 0 && ids[0] !== "default") {
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// In strict harmony modules we only support the default export
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return [
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new HarmonyLinkingError(
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`Can't import the named export ${ids
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.map(id => `'${id}'`)
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.join(
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"."
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)} ${additionalMessage} from default-exporting module (only default export is available)`
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)
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];
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}
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break;
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case "default-with-named":
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// It has a default export and named properties redirect
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// In some cases we still want to warn here
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if (
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ids.length > 0 &&
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ids[0] !== "default" &&
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/** @type {BuildMeta} */
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(importedModule.buildMeta).defaultObject === "redirect-warn"
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) {
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// For these modules only the default export is supported
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return [
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new HarmonyLinkingError(
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`Should not import the named export ${ids
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.map(id => `'${id}'`)
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.join(
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"."
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)} ${additionalMessage} from default-exporting module (only default export is available soon)`
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)
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];
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}
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break;
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}
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}
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/**
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* @param {ObjectSerializerContext} context context
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*/
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serialize(context) {
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const { write } = context;
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write(this.sourceOrder);
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write(this.assertions);
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super.serialize(context);
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}
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/**
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* @param {ObjectDeserializerContext} context context
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*/
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deserialize(context) {
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const { read } = context;
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this.sourceOrder = read();
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this.assertions = read();
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super.deserialize(context);
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}
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}
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module.exports = HarmonyImportDependency;
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/** @type {WeakMap<Module, WeakMap<Module, RuntimeSpec | boolean>>} */
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const importEmittedMap = new WeakMap();
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HarmonyImportDependency.Template = class HarmonyImportDependencyTemplate extends (
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ModuleDependency.Template
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) {
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/**
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* @param {Dependency} dependency the dependency for which the template should be applied
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* @param {ReplaceSource} source the current replace source which can be modified
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* @param {DependencyTemplateContext} templateContext the context object
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* @returns {void}
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*/
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apply(dependency, source, templateContext) {
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const dep = /** @type {HarmonyImportDependency} */ (dependency);
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const { module, chunkGraph, moduleGraph, runtime } = templateContext;
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const connection = moduleGraph.getConnection(dep);
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if (connection && !connection.isTargetActive(runtime)) return;
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const referencedModule = connection && connection.module;
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if (
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connection &&
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connection.weak &&
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referencedModule &&
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chunkGraph.getModuleId(referencedModule) === null
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) {
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// in weak references, module might not be in any chunk
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// but that's ok, we don't need that logic in this case
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return;
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}
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const moduleKey = referencedModule
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? referencedModule.identifier()
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: dep.request;
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const key = `harmony import ${moduleKey}`;
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const runtimeCondition = dep.weak
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? false
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: connection
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? filterRuntime(runtime, r => connection.isTargetActive(r))
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: true;
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if (module && referencedModule) {
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let emittedModules = importEmittedMap.get(module);
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if (emittedModules === undefined) {
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emittedModules = new WeakMap();
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importEmittedMap.set(module, emittedModules);
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}
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let mergedRuntimeCondition = runtimeCondition;
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const oldRuntimeCondition = emittedModules.get(referencedModule) || false;
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if (oldRuntimeCondition !== false && mergedRuntimeCondition !== true) {
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if (mergedRuntimeCondition === false || oldRuntimeCondition === true) {
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mergedRuntimeCondition = oldRuntimeCondition;
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} else {
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mergedRuntimeCondition = mergeRuntime(
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oldRuntimeCondition,
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mergedRuntimeCondition
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);
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}
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}
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emittedModules.set(referencedModule, mergedRuntimeCondition);
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}
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const importStatement = dep.getImportStatement(false, templateContext);
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if (
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referencedModule &&
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templateContext.moduleGraph.isAsync(referencedModule)
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) {
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templateContext.initFragments.push(
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new ConditionalInitFragment(
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importStatement[0],
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InitFragment.STAGE_HARMONY_IMPORTS,
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dep.sourceOrder,
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key,
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runtimeCondition
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)
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);
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templateContext.initFragments.push(
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new AwaitDependenciesInitFragment(
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new Set([dep.getImportVar(templateContext.moduleGraph)])
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)
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);
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templateContext.initFragments.push(
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new ConditionalInitFragment(
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importStatement[1],
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InitFragment.STAGE_ASYNC_HARMONY_IMPORTS,
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dep.sourceOrder,
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`${key} compat`,
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runtimeCondition
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)
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);
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} else {
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templateContext.initFragments.push(
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new ConditionalInitFragment(
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importStatement[0] + importStatement[1],
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InitFragment.STAGE_HARMONY_IMPORTS,
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dep.sourceOrder,
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key,
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runtimeCondition
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)
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);
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}
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}
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/**
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* @param {Module} module the module
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* @param {Module} referencedModule the referenced module
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* @returns {RuntimeSpec | boolean} runtimeCondition in which this import has been emitted
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*/
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static getImportEmittedRuntime(module, referencedModule) {
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const emittedModules = importEmittedMap.get(module);
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if (emittedModules === undefined) return false;
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return emittedModules.get(referencedModule) || false;
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}
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};
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module.exports.ExportPresenceModes = ExportPresenceModes;
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