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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ConditionalInitFragment = require("../ConditionalInitFragment");
const Dependency = require("../Dependency");
const HarmonyLinkingError = require("../HarmonyLinkingError");
const InitFragment = require("../InitFragment");
const Template = require("../Template");
const AwaitDependenciesInitFragment = require("../async-modules/AwaitDependenciesInitFragment");
const { filterRuntime, mergeRuntime } = require("../util/runtime");
const ModuleDependency = require("./ModuleDependency");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
/** @typedef {import("../WebpackError")} WebpackError */
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
class HarmonyImportDependency extends ModuleDependency {
/**
*
* @param {string} request request string
* @param {number} sourceOrder source order
*/
constructor(request, sourceOrder) {
super(request);
this.sourceOrder = sourceOrder;
}
get category() {
return "esm";
}
/**
* Returns list of exports referenced by this dependency
* @param {ModuleGraph} moduleGraph module graph
* @param {RuntimeSpec} runtime the runtime for which the module is analysed
* @returns {(string[] | ReferencedExport)[]} referenced exports
*/
getReferencedExports(moduleGraph, runtime) {
return Dependency.NO_EXPORTS_REFERENCED;
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {string} name of the variable for the import
*/
getImportVar(moduleGraph) {
const module = moduleGraph.getParentModule(this);
const meta = moduleGraph.getMeta(module);
let importVarMap = meta.importVarMap;
if (!importVarMap) meta.importVarMap = importVarMap = new Map();
let importVar = importVarMap.get(moduleGraph.getModule(this));
if (importVar) return importVar;
importVar = `${Template.toIdentifier(
`${this.userRequest}`
)}__WEBPACK_IMPORTED_MODULE_${importVarMap.size}__`;
importVarMap.set(moduleGraph.getModule(this), importVar);
return importVar;
}
/**
* @param {boolean} update create new variables or update existing one
* @param {DependencyTemplateContext} templateContext the template context
* @returns {[string, string]} the import statement and the compat statement
*/
getImportStatement(
update,
{ runtimeTemplate, module, moduleGraph, chunkGraph, runtimeRequirements }
) {
return runtimeTemplate.importStatement({
update,
module: moduleGraph.getModule(this),
chunkGraph,
importVar: this.getImportVar(moduleGraph),
request: this.request,
originModule: module,
runtimeRequirements
});
}
/**
* @param {ModuleGraph} moduleGraph module graph
* @param {string[]} ids imported ids
* @param {string} additionalMessage extra info included in the error message
* @returns {WebpackError[] | undefined} errors
*/
getLinkingErrors(moduleGraph, ids, additionalMessage) {
const importedModule = moduleGraph.getModule(this);
// ignore errors for missing or failed modules
if (!importedModule || importedModule.getNumberOfErrors() > 0) {
return;
}
const parentModule = moduleGraph.getParentModule(this);
const exportsType = importedModule.getExportsType(
moduleGraph,
parentModule.buildMeta.strictHarmonyModule
);
if (exportsType === "namespace" || exportsType === "default-with-named") {
if (ids.length === 0) {
return;
}
if (
(exportsType !== "default-with-named" || ids[0] !== "default") &&
moduleGraph.isExportProvided(importedModule, ids) === false
) {
// We are sure that it's not provided
// Try to provide detailed info in the error message
let pos = 0;
let exportsInfo = moduleGraph.getExportsInfo(importedModule);
while (pos < ids.length && exportsInfo) {
const id = ids[pos++];
const exportInfo = exportsInfo.getReadOnlyExportInfo(id);
if (exportInfo.provided === false) {
// We are sure that it's not provided
const providedExports = exportsInfo.getProvidedExports();
const moreInfo = !Array.isArray(providedExports)
? " (possible exports unknown)"
: providedExports.length === 0
? " (module has no exports)"
: ` (possible exports: ${providedExports.join(", ")})`;
return [
new HarmonyLinkingError(
`export ${ids
.slice(0, pos)
.map(id => `'${id}'`)
.join(".")} ${additionalMessage} was not found in '${
this.userRequest
}'${moreInfo}`
)
];
}
exportsInfo = exportInfo.getNestedExportsInfo();
}
// General error message
return [
new HarmonyLinkingError(
`export ${ids
.map(id => `'${id}'`)
.join(".")} ${additionalMessage} was not found in '${
this.userRequest
}'`
)
];
}
}
switch (exportsType) {
case "default-only":
// It's has only a default export
if (ids.length > 0 && ids[0] !== "default") {
// In strict harmony modules we only support the default export
return [
new HarmonyLinkingError(
`Can't import the named export ${ids
.map(id => `'${id}'`)
.join(
"."
)} ${additionalMessage} from default-exporting module (only default export is available)`
)
];
}
break;
case "default-with-named":
// It has a default export and named properties redirect
// In some cases we still want to warn here
if (
ids.length > 0 &&
ids[0] !== "default" &&
importedModule.buildMeta.defaultObject === "redirect-warn"
) {
// For these modules only the default export is supported
return [
new HarmonyLinkingError(
`Should not import the named export ${ids
.map(id => `'${id}'`)
.join(
"."
)} ${additionalMessage} from default-exporting module (only default export is available soon)`
)
];
}
break;
}
}
serialize(context) {
const { write } = context;
write(this.sourceOrder);
super.serialize(context);
}
deserialize(context) {
const { read } = context;
this.sourceOrder = read();
super.deserialize(context);
}
}
module.exports = HarmonyImportDependency;
/** @type {WeakMap<Module, WeakMap<Module, RuntimeSpec | boolean>>} */
const importEmittedMap = new WeakMap();
HarmonyImportDependency.Template = class HarmonyImportDependencyTemplate extends (
ModuleDependency.Template
) {
/**
* @param {Dependency} dependency the dependency for which the template should be applied
* @param {ReplaceSource} source the current replace source which can be modified
* @param {DependencyTemplateContext} templateContext the context object
* @returns {void}
*/
apply(dependency, source, templateContext) {
const dep = /** @type {HarmonyImportDependency} */ (dependency);
const { module, chunkGraph, moduleGraph, runtime } = templateContext;
const connection = moduleGraph.getConnection(dep);
if (connection && !connection.isTargetActive(runtime)) return;
const referencedModule = connection && connection.module;
if (
connection &&
connection.weak &&
referencedModule &&
chunkGraph.getModuleId(referencedModule) === null
) {
// in weak references, module might not be in any chunk
// but that's ok, we don't need that logic in this case
return;
}
const moduleKey = referencedModule
? referencedModule.identifier()
: dep.request;
const key = `harmony import ${moduleKey}`;
const runtimeCondition = dep.weak
? false
: connection
? filterRuntime(runtime, r => connection.isTargetActive(r))
: true;
if (module && referencedModule) {
let emittedModules = importEmittedMap.get(module);
if (emittedModules === undefined) {
emittedModules = new WeakMap();
importEmittedMap.set(module, emittedModules);
}
let mergedRuntimeCondition = runtimeCondition;
const oldRuntimeCondition = emittedModules.get(referencedModule) || false;
if (oldRuntimeCondition !== false && mergedRuntimeCondition !== true) {
if (mergedRuntimeCondition === false || oldRuntimeCondition === true) {
mergedRuntimeCondition = oldRuntimeCondition;
} else {
mergedRuntimeCondition = mergeRuntime(
oldRuntimeCondition,
mergedRuntimeCondition
);
}
}
emittedModules.set(referencedModule, mergedRuntimeCondition);
}
const importStatement = dep.getImportStatement(false, templateContext);
if (templateContext.moduleGraph.isAsync(referencedModule)) {
templateContext.initFragments.push(
new ConditionalInitFragment(
importStatement[0],
InitFragment.STAGE_HARMONY_IMPORTS,
dep.sourceOrder,
key,
runtimeCondition
)
);
templateContext.initFragments.push(
new AwaitDependenciesInitFragment(
new Set([dep.getImportVar(templateContext.moduleGraph)])
)
);
templateContext.initFragments.push(
new ConditionalInitFragment(
importStatement[1],
InitFragment.STAGE_ASYNC_HARMONY_IMPORTS,
dep.sourceOrder,
key + " compat",
runtimeCondition
)
);
} else {
templateContext.initFragments.push(
new ConditionalInitFragment(
importStatement[0] + importStatement[1],
InitFragment.STAGE_HARMONY_IMPORTS,
dep.sourceOrder,
key,
runtimeCondition
)
);
}
}
/**
*
* @param {Module} module the module
* @param {Module} referencedModule the referenced module
* @returns {RuntimeSpec | boolean} runtimeCondition in which this import has been emitted
*/
static getImportEmittedRuntime(module, referencedModule) {
const emittedModules = importEmittedMap.get(module);
if (emittedModules === undefined) return false;
return emittedModules.get(referencedModule) || false;
}
};