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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Dependency = require("../Dependency");
const { UsageState } = require("../ExportsInfo");
const HarmonyLinkingError = require("../HarmonyLinkingError");
const InitFragment = require("../InitFragment");
const RuntimeGlobals = require("../RuntimeGlobals");
const Template = require("../Template");
const { countIterable } = require("../util/IterableHelpers");
const { first, combine } = require("../util/SetHelpers");
const makeSerializable = require("../util/makeSerializable");
const propertyAccess = require("../util/propertyAccess");
const { getRuntimeKey, keyToRuntime } = require("../util/runtime");
const HarmonyExportInitFragment = require("./HarmonyExportInitFragment");
const HarmonyImportDependency = require("./HarmonyImportDependency");
const processExportInfo = require("./processExportInfo");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../ChunkGraph")} ChunkGraph */
/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
/** @typedef {import("../Dependency").TRANSITIVE} TRANSITIVE */
/** @typedef {import("../Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ExportsInfo")} ExportsInfo */
/** @typedef {import("../ExportsInfo").ExportInfo} ExportInfo */
/** @typedef {import("../Module")} Module */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../ModuleGraphConnection")} ModuleGraphConnection */
/** @typedef {import("../ModuleGraphConnection").ConnectionState} ConnectionState */
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
/** @typedef {import("../WebpackError")} WebpackError */
/** @typedef {import("../util/Hash")} Hash */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
/** @typedef {"missing"|"unused"|"empty-star"|"reexport-dynamic-default"|"reexport-named-default"|"reexport-namespace-object"|"reexport-fake-namespace-object"|"reexport-undefined"|"normal-reexport"|"dynamic-reexport"} ExportModeType */
const { ExportPresenceModes } = HarmonyImportDependency;
const idsSymbol = Symbol("HarmonyExportImportedSpecifierDependency.ids");
class NormalReexportItem {
/**
* @param {string} name export name
* @param {string[]} ids reexported ids from other module
* @param {ExportInfo} exportInfo export info from other module
* @param {boolean} checked true, if it should be checked at runtime if this export exists
* @param {boolean} hidden true, if it is hidden behind another active export in the same module
*/
constructor(name, ids, exportInfo, checked, hidden) {
this.name = name;
this.ids = ids;
this.exportInfo = exportInfo;
this.checked = checked;
this.hidden = hidden;
}
}
class ExportMode {
/**
* @param {ExportModeType} type type of the mode
*/
constructor(type) {
/** @type {ExportModeType} */
this.type = type;
// for "normal-reexport":
/** @type {NormalReexportItem[] | null} */
this.items = null;
// for "reexport-named-default" | "reexport-fake-namespace-object" | "reexport-namespace-object"
/** @type {string|null} */
this.name = null;
/** @type {ExportInfo | null} */
this.partialNamespaceExportInfo = null;
// for "dynamic-reexport":
/** @type {Set<string> | null} */
this.ignored = null;
// for "dynamic-reexport" | "empty-star":
/** @type {Set<string> | null} */
this.hidden = null;
// for "missing":
/** @type {string | null} */
this.userRequest = null;
// for "reexport-fake-namespace-object":
/** @type {number} */
this.fakeType = 0;
}
}
const determineExportAssignments = (
moduleGraph,
dependencies,
additionalDependency
) => {
const names = new Set();
const dependencyIndices = [];
if (additionalDependency) {
dependencies = dependencies.concat(additionalDependency);
}
for (const dep of dependencies) {
const i = dependencyIndices.length;
dependencyIndices[i] = names.size;
const otherImportedModule = moduleGraph.getModule(dep);
if (otherImportedModule) {
const exportsInfo = moduleGraph.getExportsInfo(otherImportedModule);
for (const exportInfo of exportsInfo.exports) {
if (
exportInfo.provided === true &&
exportInfo.name !== "default" &&
!names.has(exportInfo.name)
) {
names.add(exportInfo.name);
dependencyIndices[i] = names.size;
}
}
}
}
dependencyIndices.push(names.size);
return { names: Array.from(names), dependencyIndices };
};
const findDependencyForName = (
{ names, dependencyIndices },
name,
dependencies
) => {
const dependenciesIt = dependencies[Symbol.iterator]();
const dependencyIndicesIt = dependencyIndices[Symbol.iterator]();
let dependenciesItResult = dependenciesIt.next();
let dependencyIndicesItResult = dependencyIndicesIt.next();
if (dependencyIndicesItResult.done) return;
for (let i = 0; i < names.length; i++) {
while (i >= dependencyIndicesItResult.value) {
dependenciesItResult = dependenciesIt.next();
dependencyIndicesItResult = dependencyIndicesIt.next();
if (dependencyIndicesItResult.done) return;
}
if (names[i] === name) return dependenciesItResult.value;
}
return undefined;
};
/**
* @param {ModuleGraph} moduleGraph the module graph
* @param {HarmonyExportImportedSpecifierDependency} dep the dependency
* @param {string} runtimeKey the runtime key
* @returns {ExportMode} the export mode
*/
const getMode = (moduleGraph, dep, runtimeKey) => {
const importedModule = moduleGraph.getModule(dep);
if (!importedModule) {
const mode = new ExportMode("missing");
mode.userRequest = dep.userRequest;
return mode;
}
const name = dep.name;
const runtime = keyToRuntime(runtimeKey);
const parentModule = moduleGraph.getParentModule(dep);
const exportsInfo = moduleGraph.getExportsInfo(parentModule);
if (
name
? exportsInfo.getUsed(name, runtime) === UsageState.Unused
: exportsInfo.isUsed(runtime) === false
) {
const mode = new ExportMode("unused");
mode.name = name || "*";
return mode;
}
const importedExportsType = importedModule.getExportsType(
moduleGraph,
parentModule.buildMeta.strictHarmonyModule
);
const ids = dep.getIds(moduleGraph);
// Special handling for reexporting the default export
// from non-namespace modules
if (name && ids.length > 0 && ids[0] === "default") {
switch (importedExportsType) {
case "dynamic": {
const mode = new ExportMode("reexport-dynamic-default");
mode.name = name;
return mode;
}
case "default-only":
case "default-with-named": {
const exportInfo = exportsInfo.getReadOnlyExportInfo(name);
const mode = new ExportMode("reexport-named-default");
mode.name = name;
mode.partialNamespaceExportInfo = exportInfo;
return mode;
}
}
}
// reexporting with a fixed name
if (name) {
let mode;
const exportInfo = exportsInfo.getReadOnlyExportInfo(name);
if (ids.length > 0) {
// export { name as name }
switch (importedExportsType) {
case "default-only":
mode = new ExportMode("reexport-undefined");
mode.name = name;
break;
default:
mode = new ExportMode("normal-reexport");
mode.items = [
new NormalReexportItem(name, ids, exportInfo, false, false)
];
break;
}
} else {
// export * as name
switch (importedExportsType) {
case "default-only":
mode = new ExportMode("reexport-fake-namespace-object");
mode.name = name;
mode.partialNamespaceExportInfo = exportInfo;
mode.fakeType = 0;
break;
case "default-with-named":
mode = new ExportMode("reexport-fake-namespace-object");
mode.name = name;
mode.partialNamespaceExportInfo = exportInfo;
mode.fakeType = 2;
break;
case "dynamic":
default:
mode = new ExportMode("reexport-namespace-object");
mode.name = name;
mode.partialNamespaceExportInfo = exportInfo;
}
}
return mode;
}
// Star reexporting
const { ignoredExports, exports, checked, hidden } = dep.getStarReexports(
moduleGraph,
runtime,
exportsInfo,
importedModule
);
if (!exports) {
// We have too few info about the modules
// Delegate the logic to the runtime code
const mode = new ExportMode("dynamic-reexport");
mode.ignored = ignoredExports;
mode.hidden = hidden;
return mode;
}
if (exports.size === 0) {
const mode = new ExportMode("empty-star");
mode.hidden = hidden;
return mode;
}
const mode = new ExportMode("normal-reexport");
mode.items = Array.from(
exports,
exportName =>
new NormalReexportItem(
exportName,
[exportName],
exportsInfo.getReadOnlyExportInfo(exportName),
checked.has(exportName),
false
)
);
if (hidden !== undefined) {
for (const exportName of hidden) {
mode.items.push(
new NormalReexportItem(
exportName,
[exportName],
exportsInfo.getReadOnlyExportInfo(exportName),
false,
true
)
);
}
}
return mode;
};
class HarmonyExportImportedSpecifierDependency extends HarmonyImportDependency {
/**
* @param {string} request the request string
* @param {number} sourceOrder the order in the original source file
* @param {string[]} ids the requested export name of the imported module
* @param {string | null} name the export name of for this module
* @param {Set<string>} activeExports other named exports in the module
* @param {ReadonlyArray<HarmonyExportImportedSpecifierDependency> | Iterable<HarmonyExportImportedSpecifierDependency>} otherStarExports other star exports in the module before this import
* @param {number} exportPresenceMode mode of checking export names
* @param {HarmonyStarExportsList} allStarExports all star exports in the module
* @param {Record<string, any>=} assertions import assertions
*/
constructor(
request,
sourceOrder,
ids,
name,
activeExports,
otherStarExports,
exportPresenceMode,
allStarExports,
assertions
) {
super(request, sourceOrder, assertions);
this.ids = ids;
this.name = name;
this.activeExports = activeExports;
this.otherStarExports = otherStarExports;
this.exportPresenceMode = exportPresenceMode;
this.allStarExports = allStarExports;
}
/**
* @returns {boolean | TRANSITIVE} true, when changes to the referenced module could affect the referencing module; TRANSITIVE, when changes to the referenced module could affect referencing modules of the referencing module
*/
couldAffectReferencingModule() {
return Dependency.TRANSITIVE;
}
// TODO webpack 6 remove
get id() {
throw new Error("id was renamed to ids and type changed to string[]");
}
// TODO webpack 6 remove
getId() {
throw new Error("id was renamed to ids and type changed to string[]");
}
// TODO webpack 6 remove
setId() {
throw new Error("id was renamed to ids and type changed to string[]");
}
get type() {
return "harmony export imported specifier";
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {string[]} the imported id
*/
getIds(moduleGraph) {
return moduleGraph.getMeta(this)[idsSymbol] || this.ids;
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @param {string[]} ids the imported ids
* @returns {void}
*/
setIds(moduleGraph, ids) {
moduleGraph.getMeta(this)[idsSymbol] = ids;
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @param {RuntimeSpec} runtime the runtime
* @returns {ExportMode} the export mode
*/
getMode(moduleGraph, runtime) {
return moduleGraph.dependencyCacheProvide(
this,
getRuntimeKey(runtime),
getMode
);
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @param {RuntimeSpec} runtime the runtime
* @param {ExportsInfo} exportsInfo exports info about the current module (optional)
* @param {Module} importedModule the imported module (optional)
* @returns {{exports?: Set<string>, checked?: Set<string>, ignoredExports: Set<string>, hidden?: Set<string>}} information
*/
getStarReexports(
moduleGraph,
runtime,
exportsInfo = moduleGraph.getExportsInfo(moduleGraph.getParentModule(this)),
importedModule = moduleGraph.getModule(this)
) {
const importedExportsInfo = moduleGraph.getExportsInfo(importedModule);
const noExtraExports =
importedExportsInfo.otherExportsInfo.provided === false;
const noExtraImports =
exportsInfo.otherExportsInfo.getUsed(runtime) === UsageState.Unused;
const ignoredExports = new Set(["default", ...this.activeExports]);
let hiddenExports = undefined;
const otherStarExports =
this._discoverActiveExportsFromOtherStarExports(moduleGraph);
if (otherStarExports !== undefined) {
hiddenExports = new Set();
for (let i = 0; i < otherStarExports.namesSlice; i++) {
hiddenExports.add(otherStarExports.names[i]);
}
for (const e of ignoredExports) hiddenExports.delete(e);
}
if (!noExtraExports && !noExtraImports) {
return {
ignoredExports,
hidden: hiddenExports
};
}
/** @type {Set<string>} */
const exports = new Set();
/** @type {Set<string>} */
const checked = new Set();
/** @type {Set<string>} */
const hidden = hiddenExports !== undefined ? new Set() : undefined;
if (noExtraImports) {
for (const exportInfo of exportsInfo.orderedExports) {
const name = exportInfo.name;
if (ignoredExports.has(name)) continue;
if (exportInfo.getUsed(runtime) === UsageState.Unused) continue;
const importedExportInfo =
importedExportsInfo.getReadOnlyExportInfo(name);
if (importedExportInfo.provided === false) continue;
if (hiddenExports !== undefined && hiddenExports.has(name)) {
hidden.add(name);
continue;
}
exports.add(name);
if (importedExportInfo.provided === true) continue;
checked.add(name);
}
} else if (noExtraExports) {
for (const importedExportInfo of importedExportsInfo.orderedExports) {
const name = importedExportInfo.name;
if (ignoredExports.has(name)) continue;
if (importedExportInfo.provided === false) continue;
const exportInfo = exportsInfo.getReadOnlyExportInfo(name);
if (exportInfo.getUsed(runtime) === UsageState.Unused) continue;
if (hiddenExports !== undefined && hiddenExports.has(name)) {
hidden.add(name);
continue;
}
exports.add(name);
if (importedExportInfo.provided === true) continue;
checked.add(name);
}
}
return { ignoredExports, exports, checked, hidden };
}
/**
* @param {ModuleGraph} moduleGraph module graph
* @returns {null | false | function(ModuleGraphConnection, RuntimeSpec): ConnectionState} function to determine if the connection is active
*/
getCondition(moduleGraph) {
return (connection, runtime) => {
const mode = this.getMode(moduleGraph, runtime);
return mode.type !== "unused" && mode.type !== "empty-star";
};
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {ConnectionState} how this dependency connects the module to referencing modules
*/
getModuleEvaluationSideEffectsState(moduleGraph) {
return false;
}
/**
* 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) {
const mode = this.getMode(moduleGraph, runtime);
switch (mode.type) {
case "missing":
case "unused":
case "empty-star":
case "reexport-undefined":
return Dependency.NO_EXPORTS_REFERENCED;
case "reexport-dynamic-default":
return Dependency.EXPORTS_OBJECT_REFERENCED;
case "reexport-named-default": {
if (!mode.partialNamespaceExportInfo)
return Dependency.EXPORTS_OBJECT_REFERENCED;
/** @type {string[][]} */
const referencedExports = [];
processExportInfo(
runtime,
referencedExports,
[],
/** @type {ExportInfo} */ (mode.partialNamespaceExportInfo)
);
return referencedExports;
}
case "reexport-namespace-object":
case "reexport-fake-namespace-object": {
if (!mode.partialNamespaceExportInfo)
return Dependency.EXPORTS_OBJECT_REFERENCED;
/** @type {string[][]} */
const referencedExports = [];
processExportInfo(
runtime,
referencedExports,
[],
/** @type {ExportInfo} */ (mode.partialNamespaceExportInfo),
mode.type === "reexport-fake-namespace-object"
);
return referencedExports;
}
case "dynamic-reexport":
return Dependency.EXPORTS_OBJECT_REFERENCED;
case "normal-reexport": {
const referencedExports = [];
for (const { ids, exportInfo, hidden } of mode.items) {
if (hidden) continue;
processExportInfo(runtime, referencedExports, ids, exportInfo, false);
}
return referencedExports;
}
default:
throw new Error(`Unknown mode ${mode.type}`);
}
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {{ names: string[], namesSlice: number, dependencyIndices: number[], dependencyIndex: number } | undefined} exported names and their origin dependency
*/
_discoverActiveExportsFromOtherStarExports(moduleGraph) {
if (!this.otherStarExports) return undefined;
const i =
"length" in this.otherStarExports
? this.otherStarExports.length
: countIterable(this.otherStarExports);
if (i === 0) return undefined;
if (this.allStarExports) {
const { names, dependencyIndices } = moduleGraph.cached(
determineExportAssignments,
this.allStarExports.dependencies
);
return {
names,
namesSlice: dependencyIndices[i - 1],
dependencyIndices,
dependencyIndex: i
};
}
const { names, dependencyIndices } = moduleGraph.cached(
determineExportAssignments,
this.otherStarExports,
this
);
return {
names,
namesSlice: dependencyIndices[i - 1],
dependencyIndices,
dependencyIndex: i
};
}
/**
* Returns the exported names
* @param {ModuleGraph} moduleGraph module graph
* @returns {ExportsSpec | undefined} export names
*/
getExports(moduleGraph) {
const mode = this.getMode(moduleGraph, undefined);
switch (mode.type) {
case "missing":
return undefined;
case "dynamic-reexport": {
const from = moduleGraph.getConnection(this);
return {
exports: true,
from,
canMangle: false,
excludeExports: mode.hidden
? combine(mode.ignored, mode.hidden)
: mode.ignored,
hideExports: mode.hidden,
dependencies: [from.module]
};
}
case "empty-star":
return {
exports: [],
hideExports: mode.hidden,
dependencies: [moduleGraph.getModule(this)]
};
// falls through
case "normal-reexport": {
const from = moduleGraph.getConnection(this);
return {
exports: Array.from(mode.items, item => ({
name: item.name,
from,
export: item.ids,
hidden: item.hidden
})),
priority: 1,
dependencies: [from.module]
};
}
case "reexport-dynamic-default": {
{
const from = moduleGraph.getConnection(this);
return {
exports: [
{
name: mode.name,
from,
export: ["default"]
}
],
priority: 1,
dependencies: [from.module]
};
}
}
case "reexport-undefined":
return {
exports: [mode.name],
dependencies: [moduleGraph.getModule(this)]
};
case "reexport-fake-namespace-object": {
const from = moduleGraph.getConnection(this);
return {
exports: [
{
name: mode.name,
from,
export: null,
exports: [
{
name: "default",
canMangle: false,
from,
export: null
}
]
}
],
priority: 1,
dependencies: [from.module]
};
}
case "reexport-namespace-object": {
const from = moduleGraph.getConnection(this);
return {
exports: [
{
name: mode.name,
from,
export: null
}
],
priority: 1,
dependencies: [from.module]
};
}
case "reexport-named-default": {
const from = moduleGraph.getConnection(this);
return {
exports: [
{
name: mode.name,
from,
export: ["default"]
}
],
priority: 1,
dependencies: [from.module]
};
}
default:
throw new Error(`Unknown mode ${mode.type}`);
}
}
/**
* @param {ModuleGraph} moduleGraph module graph
* @returns {number} effective mode
*/
_getEffectiveExportPresenceLevel(moduleGraph) {
if (this.exportPresenceMode !== ExportPresenceModes.AUTO)
return this.exportPresenceMode;
return moduleGraph.getParentModule(this).buildMeta.strictHarmonyModule
? ExportPresenceModes.ERROR
: ExportPresenceModes.WARN;
}
/**
* Returns warnings
* @param {ModuleGraph} moduleGraph module graph
* @returns {WebpackError[]} warnings
*/
getWarnings(moduleGraph) {
const exportsPresence = this._getEffectiveExportPresenceLevel(moduleGraph);
if (exportsPresence === ExportPresenceModes.WARN) {
return this._getErrors(moduleGraph);
}
return null;
}
/**
* Returns errors
* @param {ModuleGraph} moduleGraph module graph
* @returns {WebpackError[]} errors
*/
getErrors(moduleGraph) {
const exportsPresence = this._getEffectiveExportPresenceLevel(moduleGraph);
if (exportsPresence === ExportPresenceModes.ERROR) {
return this._getErrors(moduleGraph);
}
return null;
}
/**
* @param {ModuleGraph} moduleGraph module graph
* @returns {WebpackError[] | undefined} errors
*/
_getErrors(moduleGraph) {
const ids = this.getIds(moduleGraph);
let errors = this.getLinkingErrors(
moduleGraph,
ids,
`(reexported as '${this.name}')`
);
if (ids.length === 0 && this.name === null) {
const potentialConflicts =
this._discoverActiveExportsFromOtherStarExports(moduleGraph);
if (potentialConflicts && potentialConflicts.namesSlice > 0) {
const ownNames = new Set(
potentialConflicts.names.slice(
potentialConflicts.namesSlice,
potentialConflicts.dependencyIndices[
potentialConflicts.dependencyIndex
]
)
);
const importedModule = moduleGraph.getModule(this);
if (importedModule) {
const exportsInfo = moduleGraph.getExportsInfo(importedModule);
const conflicts = new Map();
for (const exportInfo of exportsInfo.orderedExports) {
if (exportInfo.provided !== true) continue;
if (exportInfo.name === "default") continue;
if (this.activeExports.has(exportInfo.name)) continue;
if (ownNames.has(exportInfo.name)) continue;
const conflictingDependency = findDependencyForName(
potentialConflicts,
exportInfo.name,
this.allStarExports
? this.allStarExports.dependencies
: [...this.otherStarExports, this]
);
if (!conflictingDependency) continue;
const target = exportInfo.getTerminalBinding(moduleGraph);
if (!target) continue;
const conflictingModule = moduleGraph.getModule(
conflictingDependency
);
if (conflictingModule === importedModule) continue;
const conflictingExportInfo = moduleGraph.getExportInfo(
conflictingModule,
exportInfo.name
);
const conflictingTarget =
conflictingExportInfo.getTerminalBinding(moduleGraph);
if (!conflictingTarget) continue;
if (target === conflictingTarget) continue;
const list = conflicts.get(conflictingDependency.request);
if (list === undefined) {
conflicts.set(conflictingDependency.request, [exportInfo.name]);
} else {
list.push(exportInfo.name);
}
}
for (const [request, exports] of conflicts) {
if (!errors) errors = [];
errors.push(
new HarmonyLinkingError(
`The requested module '${
this.request
}' contains conflicting star exports for the ${
exports.length > 1 ? "names" : "name"
} ${exports
.map(e => `'${e}'`)
.join(", ")} with the previous requested module '${request}'`
)
);
}
}
}
}
return errors;
}
serialize(context) {
const { write, setCircularReference } = context;
setCircularReference(this);
write(this.ids);
write(this.name);
write(this.activeExports);
write(this.otherStarExports);
write(this.exportPresenceMode);
write(this.allStarExports);
super.serialize(context);
}
deserialize(context) {
const { read, setCircularReference } = context;
setCircularReference(this);
this.ids = read();
this.name = read();
this.activeExports = read();
this.otherStarExports = read();
this.exportPresenceMode = read();
this.allStarExports = read();
super.deserialize(context);
}
}
makeSerializable(
HarmonyExportImportedSpecifierDependency,
"webpack/lib/dependencies/HarmonyExportImportedSpecifierDependency"
);
module.exports = HarmonyExportImportedSpecifierDependency;
HarmonyExportImportedSpecifierDependency.Template = class HarmonyExportImportedSpecifierDependencyTemplate extends (
HarmonyImportDependency.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 { moduleGraph, runtime, concatenationScope } = templateContext;
const dep = /** @type {HarmonyExportImportedSpecifierDependency} */ (
dependency
);
const mode = dep.getMode(moduleGraph, runtime);
if (concatenationScope) {
switch (mode.type) {
case "reexport-undefined":
concatenationScope.registerRawExport(
mode.name,
"/* reexport non-default export from non-harmony */ undefined"
);
}
return;
}
if (mode.type !== "unused" && mode.type !== "empty-star") {
super.apply(dependency, source, templateContext);
this._addExportFragments(
templateContext.initFragments,
dep,
mode,
templateContext.module,
moduleGraph,
runtime,
templateContext.runtimeTemplate,
templateContext.runtimeRequirements
);
}
}
/**
* @param {InitFragment[]} initFragments target array for init fragments
* @param {HarmonyExportImportedSpecifierDependency} dep dependency
* @param {ExportMode} mode the export mode
* @param {Module} module the current module
* @param {ModuleGraph} moduleGraph the module graph
* @param {RuntimeSpec} runtime the runtime
* @param {RuntimeTemplate} runtimeTemplate the runtime template
* @param {Set<string>} runtimeRequirements runtime requirements
* @returns {void}
*/
_addExportFragments(
initFragments,
dep,
mode,
module,
moduleGraph,
runtime,
runtimeTemplate,
runtimeRequirements
) {
const importedModule = moduleGraph.getModule(dep);
const importVar = dep.getImportVar(moduleGraph);
switch (mode.type) {
case "missing":
case "empty-star":
initFragments.push(
new InitFragment(
"/* empty/unused harmony star reexport */\n",
InitFragment.STAGE_HARMONY_EXPORTS,
1
)
);
break;
case "unused":
initFragments.push(
new InitFragment(
`${Template.toNormalComment(
`unused harmony reexport ${mode.name}`
)}\n`,
InitFragment.STAGE_HARMONY_EXPORTS,
1
)
);
break;
case "reexport-dynamic-default":
initFragments.push(
this.getReexportFragment(
module,
"reexport default from dynamic",
moduleGraph.getExportsInfo(module).getUsedName(mode.name, runtime),
importVar,
null,
runtimeRequirements
)
);
break;
case "reexport-fake-namespace-object":
initFragments.push(
...this.getReexportFakeNamespaceObjectFragments(
module,
moduleGraph.getExportsInfo(module).getUsedName(mode.name, runtime),
importVar,
mode.fakeType,
runtimeRequirements
)
);
break;
case "reexport-undefined":
initFragments.push(
this.getReexportFragment(
module,
"reexport non-default export from non-harmony",
moduleGraph.getExportsInfo(module).getUsedName(mode.name, runtime),
"undefined",
"",
runtimeRequirements
)
);
break;
case "reexport-named-default":
initFragments.push(
this.getReexportFragment(
module,
"reexport default export from named module",
moduleGraph.getExportsInfo(module).getUsedName(mode.name, runtime),
importVar,
"",
runtimeRequirements
)
);
break;
case "reexport-namespace-object":
initFragments.push(
this.getReexportFragment(
module,
"reexport module object",
moduleGraph.getExportsInfo(module).getUsedName(mode.name, runtime),
importVar,
"",
runtimeRequirements
)
);
break;
case "normal-reexport":
for (const { name, ids, checked, hidden } of mode.items) {
if (hidden) continue;
if (checked) {
initFragments.push(
new InitFragment(
"/* harmony reexport (checked) */ " +
this.getConditionalReexportStatement(
module,
name,
importVar,
ids,
runtimeRequirements
),
moduleGraph.isAsync(importedModule)
? InitFragment.STAGE_ASYNC_HARMONY_IMPORTS
: InitFragment.STAGE_HARMONY_IMPORTS,
dep.sourceOrder
)
);
} else {
initFragments.push(
this.getReexportFragment(
module,
"reexport safe",
moduleGraph.getExportsInfo(module).getUsedName(name, runtime),
importVar,
moduleGraph
.getExportsInfo(importedModule)
.getUsedName(ids, runtime),
runtimeRequirements
)
);
}
}
break;
case "dynamic-reexport": {
const ignored = mode.hidden
? combine(mode.ignored, mode.hidden)
: mode.ignored;
const modern =
runtimeTemplate.supportsConst() &&
runtimeTemplate.supportsArrowFunction();
let content =
"/* harmony reexport (unknown) */ var __WEBPACK_REEXPORT_OBJECT__ = {};\n" +
`/* harmony reexport (unknown) */ for(${
modern ? "const" : "var"
} __WEBPACK_IMPORT_KEY__ in ${importVar}) `;
// Filter out exports which are defined by other exports
// and filter out default export because it cannot be reexported with *
if (ignored.size > 1) {
content +=
"if(" +
JSON.stringify(Array.from(ignored)) +
".indexOf(__WEBPACK_IMPORT_KEY__) < 0) ";
} else if (ignored.size === 1) {
content += `if(__WEBPACK_IMPORT_KEY__ !== ${JSON.stringify(
first(ignored)
)}) `;
}
content += `__WEBPACK_REEXPORT_OBJECT__[__WEBPACK_IMPORT_KEY__] = `;
if (modern) {
content += `() => ${importVar}[__WEBPACK_IMPORT_KEY__]`;
} else {
content += `function(key) { return ${importVar}[key]; }.bind(0, __WEBPACK_IMPORT_KEY__)`;
}
runtimeRequirements.add(RuntimeGlobals.exports);
runtimeRequirements.add(RuntimeGlobals.definePropertyGetters);
const exportsName = module.exportsArgument;
initFragments.push(
new InitFragment(
`${content}\n/* harmony reexport (unknown) */ ${RuntimeGlobals.definePropertyGetters}(${exportsName}, __WEBPACK_REEXPORT_OBJECT__);\n`,
moduleGraph.isAsync(importedModule)
? InitFragment.STAGE_ASYNC_HARMONY_IMPORTS
: InitFragment.STAGE_HARMONY_IMPORTS,
dep.sourceOrder
)
);
break;
}
default:
throw new Error(`Unknown mode ${mode.type}`);
}
}
getReexportFragment(
module,
comment,
key,
name,
valueKey,
runtimeRequirements
) {
const returnValue = this.getReturnValue(name, valueKey);
runtimeRequirements.add(RuntimeGlobals.exports);
runtimeRequirements.add(RuntimeGlobals.definePropertyGetters);
const map = new Map();
map.set(key, `/* ${comment} */ ${returnValue}`);
return new HarmonyExportInitFragment(module.exportsArgument, map);
}
getReexportFakeNamespaceObjectFragments(
module,
key,
name,
fakeType,
runtimeRequirements
) {
runtimeRequirements.add(RuntimeGlobals.exports);
runtimeRequirements.add(RuntimeGlobals.definePropertyGetters);
runtimeRequirements.add(RuntimeGlobals.createFakeNamespaceObject);
const map = new Map();
map.set(
key,
`/* reexport fake namespace object from non-harmony */ ${name}_namespace_cache || (${name}_namespace_cache = ${
RuntimeGlobals.createFakeNamespaceObject
}(${name}${fakeType ? `, ${fakeType}` : ""}))`
);
return [
new InitFragment(
`var ${name}_namespace_cache;\n`,
InitFragment.STAGE_CONSTANTS,
-1,
`${name}_namespace_cache`
),
new HarmonyExportInitFragment(module.exportsArgument, map)
];
}
getConditionalReexportStatement(
module,
key,
name,
valueKey,
runtimeRequirements
) {
if (valueKey === false) {
return "/* unused export */\n";
}
const exportsName = module.exportsArgument;
const returnValue = this.getReturnValue(name, valueKey);
runtimeRequirements.add(RuntimeGlobals.exports);
runtimeRequirements.add(RuntimeGlobals.definePropertyGetters);
runtimeRequirements.add(RuntimeGlobals.hasOwnProperty);
return `if(${RuntimeGlobals.hasOwnProperty}(${name}, ${JSON.stringify(
valueKey[0]
)})) ${
RuntimeGlobals.definePropertyGetters
}(${exportsName}, { ${JSON.stringify(
key
)}: function() { return ${returnValue}; } });\n`;
}
getReturnValue(name, valueKey) {
if (valueKey === null) {
return `${name}_default.a`;
}
if (valueKey === "") {
return name;
}
if (valueKey === false) {
return "/* unused export */ undefined";
}
return `${name}${propertyAccess(valueKey)}`;
}
};
class HarmonyStarExportsList {
constructor() {
/** @type {HarmonyExportImportedSpecifierDependency[]} */
this.dependencies = [];
}
/**
* @param {HarmonyExportImportedSpecifierDependency} dep dependency
* @returns {void}
*/
push(dep) {
this.dependencies.push(dep);
}
slice() {
return this.dependencies.slice();
}
serialize({ write, setCircularReference }) {
setCircularReference(this);
write(this.dependencies);
}
deserialize({ read, setCircularReference }) {
setCircularReference(this);
this.dependencies = read();
}
}
makeSerializable(
HarmonyStarExportsList,
"webpack/lib/dependencies/HarmonyExportImportedSpecifierDependency",
"HarmonyStarExportsList"
);
module.exports.HarmonyStarExportsList = HarmonyStarExportsList;