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1093 lines (1007 loc) · 32 KB
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const util = require("util");
const ExportsInfo = require("./ExportsInfo");
const ModuleGraphConnection = require("./ModuleGraphConnection");
const HarmonyImportDependency = require("./dependencies/HarmonyImportDependency");
const { ImportPhaseUtils } = require("./dependencies/ImportPhase");
const SortableSet = require("./util/SortableSet");
const WeakTupleMap = require("./util/WeakTupleMap");
const { sortWithSourceOrder } = require("./util/comparators");
/** @typedef {import("./Compilation").ModuleMemCaches} ModuleMemCaches */
/** @typedef {import("./DependenciesBlock")} DependenciesBlock */
/** @typedef {import("./Dependency")} Dependency */
/** @typedef {import("./ExportsInfo").ExportInfo} ExportInfo */
/** @typedef {import("./ExportsInfo").ExportInfoName} ExportInfoName */
/** @typedef {import("./Module")} Module */
/** @typedef {import("./ModuleProfile")} ModuleProfile */
/** @typedef {import("./RequestShortener")} RequestShortener */
/** @typedef {import("./util/runtime").RuntimeSpec} RuntimeSpec */
/** @typedef {import("./dependencies/HarmonyImportSideEffectDependency")} HarmonyImportSideEffectDependency */
/** @typedef {import("./dependencies/HarmonyImportSpecifierDependency")} HarmonyImportSpecifierDependency */
/** @typedef {import("./util/comparators").DependencySourceOrder} DependencySourceOrder */
/**
* Defines the optimization bailout function callback.
* @callback OptimizationBailoutFunction
* @param {RequestShortener} requestShortener
* @returns {string}
*/
/** @type {Iterable<ModuleGraphConnection>} */
const EMPTY_SET = new Set();
/**
* Gets connections by key.
* @template {Module | null | undefined} T
* @param {SortableSet<ModuleGraphConnection>} set input
* @param {(connection: ModuleGraphConnection) => T} getKey function to extract key from connection
* @returns {ReadonlyMap<T, ReadonlyArray<ModuleGraphConnection>>} mapped by key
*/
const getConnectionsByKey = (set, getKey) => {
/** @type {Map<T, ModuleGraphConnection[]>} */
const map = new Map();
/** @type {T | 0} */
let lastKey = 0;
/** @type {ModuleGraphConnection[] | undefined} */
let lastList;
for (const connection of set) {
const key = getKey(connection);
if (lastKey === key) {
/** @type {ModuleGraphConnection[]} */
(lastList).push(connection);
} else {
lastKey = key;
const list = map.get(key);
if (list !== undefined) {
lastList = list;
list.push(connection);
} else {
const list = [connection];
lastList = list;
map.set(key, list);
}
}
}
return map;
};
/**
* Gets connections by origin module.
* @param {SortableSet<ModuleGraphConnection>} set input
* @returns {ReadonlyMap<Module | undefined | null, ReadonlyArray<ModuleGraphConnection>>} mapped by origin module
*/
const getConnectionsByOriginModule = (set) =>
getConnectionsByKey(set, (connection) => connection.originModule);
/**
* Gets connections by module.
* @param {SortableSet<ModuleGraphConnection>} set input
* @returns {ReadonlyMap<Module | undefined, ReadonlyArray<ModuleGraphConnection>>} mapped by module
*/
const getConnectionsByModule = (set) =>
getConnectionsByKey(set, (connection) => connection.module);
/** @typedef {SortableSet<ModuleGraphConnection>} IncomingConnections */
/** @typedef {SortableSet<ModuleGraphConnection>} OutgoingConnections */
/** @typedef {Module | null | undefined} Issuer */
/** @typedef {(string | OptimizationBailoutFunction)[]} OptimizationBailouts */
class ModuleGraphModule {
constructor() {
/** @type {IncomingConnections} */
this.incomingConnections = new SortableSet();
/** @type {OutgoingConnections | undefined} */
this.outgoingConnections = undefined;
/** @type {Issuer} */
this.issuer = undefined;
/** @type {OptimizationBailouts} */
this.optimizationBailout = [];
/** @type {ExportsInfo} */
this.exports = new ExportsInfo();
/** @type {number | null} */
this.preOrderIndex = null;
/** @type {number | null} */
this.postOrderIndex = null;
/** @type {number | null} */
this.depth = null;
/** @type {ModuleProfile | undefined} */
this.profile = undefined;
/** @type {boolean} */
this.async = false;
/** @type {ModuleGraphConnection[] | undefined} */
this._unassignedConnections = undefined;
}
}
/** @typedef {(moduleGraphConnection: ModuleGraphConnection) => boolean} FilterConnection */
/** @typedef {EXPECTED_OBJECT} MetaKey */
/** @typedef {import("./dependencies/CommonJsExportRequireDependency").idsSymbol} CommonJsExportRequireDependencyIDsSymbol */
/** @typedef {import("./dependencies/HarmonyImportSpecifierDependency").idsSymbol} HarmonyImportSpecifierDependencyIDsSymbol */
/** @typedef {import("./dependencies/HarmonyExportImportedSpecifierDependency").idsSymbol} HarmonyExportImportedSpecifierDependencyIDsSymbol */
/**
* Defines the known meta type used by this module.
* @typedef {object} KnownMeta
* @property {Map<Module, string>=} importVarMap
* @property {Map<Module, string>=} deferredImportVarMap
*/
/** @typedef {KnownMeta & Record<CommonJsExportRequireDependencyIDsSymbol | HarmonyImportSpecifierDependencyIDsSymbol | HarmonyExportImportedSpecifierDependencyIDsSymbol, string[]> & Record<string, EXPECTED_ANY>} Meta */
class ModuleGraph {
constructor() {
/**
* @type {WeakMap<Dependency, ModuleGraphConnection | null>}
* @private
*/
this._dependencyMap = new WeakMap();
/**
* @type {Map<Module, ModuleGraphModule>}
* @private
*/
this._moduleMap = new Map();
/**
* @type {WeakMap<MetaKey, Meta>}
* @private
*/
this._metaMap = new WeakMap();
/**
* @type {WeakTupleMap<EXPECTED_ANY[], EXPECTED_ANY> | undefined}
* @private
*/
this._cache = undefined;
/**
* @type {ModuleMemCaches | undefined}
* @private
*/
this._moduleMemCaches = undefined;
/**
* @type {string | undefined}
* @private
*/
this._cacheStage = undefined;
/**
* @type {WeakMap<Dependency, DependencySourceOrder>}
* @private
*/
this._dependencySourceOrderMap = new WeakMap();
/**
* @type {Set<Module>}
* @private
*/
this._modulesNeedingSort = new Set();
}
/**
* Get module graph module.
* @param {Module} module the module
* @returns {ModuleGraphModule} the internal module
*/
_getModuleGraphModule(module) {
let mgm = this._moduleMap.get(module);
if (mgm === undefined) {
mgm = new ModuleGraphModule();
this._moduleMap.set(module, mgm);
}
return mgm;
}
/**
* Updates parents using the provided dependency.
* @param {Dependency} dependency the dependency
* @param {DependenciesBlock} block parent block
* @param {Module} module parent module
* @param {number=} indexInBlock position in block
* @returns {void}
*/
setParents(dependency, block, module, indexInBlock = -1) {
dependency._parentDependenciesBlockIndex = indexInBlock;
dependency._parentDependenciesBlock = block;
dependency._parentModule = module;
}
/**
* Sets parent dependencies block index.
* @param {Dependency} dependency the dependency
* @param {number} index the index
* @returns {void}
*/
setParentDependenciesBlockIndex(dependency, index) {
dependency._parentDependenciesBlockIndex = index;
}
/**
* Gets parent module.
* @param {Dependency} dependency the dependency
* @returns {Module | undefined} parent module
*/
getParentModule(dependency) {
return dependency._parentModule;
}
/**
* Returns parent block.
* @param {Dependency} dependency the dependency
* @returns {DependenciesBlock | undefined} parent block
*/
getParentBlock(dependency) {
return dependency._parentDependenciesBlock;
}
/**
* Gets parent block index.
* @param {Dependency} dependency the dependency
* @returns {number} index
*/
getParentBlockIndex(dependency) {
return dependency._parentDependenciesBlockIndex;
}
/**
* Sets resolved module.
* @param {Module | null} originModule the referencing module
* @param {Dependency} dependency the referencing dependency
* @param {Module} module the referenced module
* @returns {void}
*/
setResolvedModule(originModule, dependency, module) {
const connection = new ModuleGraphConnection(
originModule,
dependency,
module,
undefined,
dependency.weak,
dependency.getCondition(this)
);
const connections = this._getModuleGraphModule(module).incomingConnections;
connections.add(connection);
if (originModule) {
const mgm = this._getModuleGraphModule(originModule);
if (mgm._unassignedConnections === undefined) {
mgm._unassignedConnections = [];
}
mgm._unassignedConnections.push(connection);
if (mgm.outgoingConnections === undefined) {
mgm.outgoingConnections = new SortableSet();
}
mgm.outgoingConnections.add(connection);
} else {
this._dependencyMap.set(dependency, connection);
}
}
/**
* Updates module using the provided dependency.
* @param {Dependency} dependency the referencing dependency
* @param {Module} module the referenced module
* @returns {void}
*/
updateModule(dependency, module) {
const connection =
/** @type {ModuleGraphConnection} */
(this.getConnection(dependency));
if (connection.module === module) return;
const newConnection = connection.clone();
newConnection.module = module;
this._dependencyMap.set(dependency, newConnection);
connection.setActive(false);
const originMgm = this._getModuleGraphModule(
/** @type {Module} */ (connection.originModule)
);
/** @type {OutgoingConnections} */
(originMgm.outgoingConnections).add(newConnection);
const targetMgm = this._getModuleGraphModule(module);
targetMgm.incomingConnections.add(newConnection);
}
/**
* Updates parent using the provided dependency.
* @param {Dependency} dependency the need update dependency
* @param {ModuleGraphConnection=} connection the target connection
* @param {Module=} parentModule the parent module
* @returns {void}
*/
updateParent(dependency, connection, parentModule) {
if (this._dependencySourceOrderMap.has(dependency)) {
return;
}
if (!connection || !parentModule) {
return;
}
const originDependency = connection.dependency;
// src/index.js
// import { c } from "lib/c" -> c = 0
// import { a, b } from "lib" -> a and b have the same source order -> a = b = 1
// import { d } from "lib/d" -> d = 2
const currentSourceOrder =
/** @type {HarmonyImportSideEffectDependency | HarmonyImportSpecifierDependency} */
(dependency).sourceOrder;
// lib/index.js (reexport)
// import { a } from "lib/a" -> a = 0
// import { b } from "lib/b" -> b = 1
const originSourceOrder =
/** @type {HarmonyImportSideEffectDependency | HarmonyImportSpecifierDependency} */
(originDependency).sourceOrder;
if (
typeof currentSourceOrder === "number" &&
typeof originSourceOrder === "number"
) {
// src/index.js
// import { c } from "lib/c" -> c = 0
// import { a } from "lib/a" -> a = 1.0 = 1(main) + 0.0(sub)
// import { b } from "lib/b" -> b = 1.1 = 1(main) + 0.1(sub)
// import { d } from "lib/d" -> d = 2
this._dependencySourceOrderMap.set(dependency, {
main: currentSourceOrder,
sub: originSourceOrder
});
// Save for later batch sorting
this._modulesNeedingSort.add(parentModule);
}
}
/**
* Finish update parent.
* @returns {void}
*/
finishUpdateParent() {
if (this._modulesNeedingSort.size === 0) {
return;
}
for (const mod of this._modulesNeedingSort) {
// If dependencies like HarmonyImportSideEffectDependency and HarmonyImportSpecifierDependency have a SourceOrder,
// we sort based on it; otherwise, we preserve the original order.
sortWithSourceOrder(
mod.dependencies,
this._dependencySourceOrderMap,
(dep, index) => this.setParentDependenciesBlockIndex(dep, index)
);
}
this._modulesNeedingSort.clear();
}
/**
* Removes connection.
* @param {Dependency} dependency the referencing dependency
* @returns {void}
*/
removeConnection(dependency) {
const connection =
/** @type {ModuleGraphConnection} */
(this.getConnection(dependency));
const targetMgm = this._getModuleGraphModule(connection.module);
targetMgm.incomingConnections.delete(connection);
const originMgm = this._getModuleGraphModule(
/** @type {Module} */ (connection.originModule)
);
/** @type {OutgoingConnections} */
(originMgm.outgoingConnections).delete(connection);
this._dependencyMap.set(dependency, null);
}
/**
* Adds the provided dependency to the module graph.
* @param {Dependency} dependency the referencing dependency
* @param {string} explanation an explanation
* @returns {void}
*/
addExplanation(dependency, explanation) {
const connection =
/** @type {ModuleGraphConnection} */
(this.getConnection(dependency));
connection.addExplanation(explanation);
}
/**
* Clones module attributes.
* @param {Module} sourceModule the source module
* @param {Module} targetModule the target module
* @returns {void}
*/
cloneModuleAttributes(sourceModule, targetModule) {
const oldMgm = this._getModuleGraphModule(sourceModule);
const newMgm = this._getModuleGraphModule(targetModule);
newMgm.postOrderIndex = oldMgm.postOrderIndex;
newMgm.preOrderIndex = oldMgm.preOrderIndex;
newMgm.depth = oldMgm.depth;
newMgm.exports = oldMgm.exports;
newMgm.async = oldMgm.async;
}
/**
* Removes module attributes.
* @param {Module} module the module
* @returns {void}
*/
removeModuleAttributes(module) {
const mgm = this._getModuleGraphModule(module);
mgm.postOrderIndex = null;
mgm.preOrderIndex = null;
mgm.depth = null;
mgm.async = false;
}
/**
* Removes all module attributes.
* @returns {void}
*/
removeAllModuleAttributes() {
for (const mgm of this._moduleMap.values()) {
mgm.postOrderIndex = null;
mgm.preOrderIndex = null;
mgm.depth = null;
mgm.async = false;
}
}
/**
* Move module connections.
* @param {Module} oldModule the old referencing module
* @param {Module} newModule the new referencing module
* @param {FilterConnection} filterConnection filter predicate for replacement
* @returns {void}
*/
moveModuleConnections(oldModule, newModule, filterConnection) {
if (oldModule === newModule) return;
const oldMgm = this._getModuleGraphModule(oldModule);
const newMgm = this._getModuleGraphModule(newModule);
// Outgoing connections
const oldConnections = oldMgm.outgoingConnections;
if (oldConnections !== undefined) {
if (newMgm.outgoingConnections === undefined) {
newMgm.outgoingConnections = new SortableSet();
}
const newConnections = newMgm.outgoingConnections;
for (const connection of oldConnections) {
if (filterConnection(connection)) {
connection.originModule = newModule;
newConnections.add(connection);
oldConnections.delete(connection);
}
}
}
// Incoming connections
const oldConnections2 = oldMgm.incomingConnections;
const newConnections2 = newMgm.incomingConnections;
for (const connection of oldConnections2) {
if (filterConnection(connection)) {
connection.module = newModule;
newConnections2.add(connection);
oldConnections2.delete(connection);
}
}
}
/**
* Copies outgoing module connections.
* @param {Module} oldModule the old referencing module
* @param {Module} newModule the new referencing module
* @param {FilterConnection} filterConnection filter predicate for replacement
* @returns {void}
*/
copyOutgoingModuleConnections(oldModule, newModule, filterConnection) {
if (oldModule === newModule) return;
const oldMgm = this._getModuleGraphModule(oldModule);
const newMgm = this._getModuleGraphModule(newModule);
// Outgoing connections
const oldConnections = oldMgm.outgoingConnections;
if (oldConnections !== undefined) {
if (newMgm.outgoingConnections === undefined) {
newMgm.outgoingConnections = new SortableSet();
}
const newConnections = newMgm.outgoingConnections;
for (const connection of oldConnections) {
if (filterConnection(connection)) {
const newConnection = connection.clone();
newConnection.originModule = newModule;
newConnections.add(newConnection);
if (newConnection.module !== undefined) {
const otherMgm = this._getModuleGraphModule(newConnection.module);
otherMgm.incomingConnections.add(newConnection);
}
}
}
}
}
/**
* Adds the provided module to the module graph.
* @param {Module} module the referenced module
* @param {string} explanation an explanation why it's referenced
* @returns {void}
*/
addExtraReason(module, explanation) {
const connections = this._getModuleGraphModule(module).incomingConnections;
connections.add(new ModuleGraphConnection(null, null, module, explanation));
}
/**
* Gets resolved module.
* @param {Dependency} dependency the dependency to look for a referenced module
* @returns {Module | null} the referenced module
*/
getResolvedModule(dependency) {
const connection = this.getConnection(dependency);
return connection !== undefined ? connection.resolvedModule : null;
}
/**
* Returns the connection.
* @param {Dependency} dependency the dependency to look for a referenced module
* @returns {ModuleGraphConnection | undefined} the connection
*/
getConnection(dependency) {
const connection = this._dependencyMap.get(dependency);
if (connection === undefined) {
const module = this.getParentModule(dependency);
if (module !== undefined) {
const mgm = this._getModuleGraphModule(module);
if (
mgm._unassignedConnections &&
mgm._unassignedConnections.length !== 0
) {
/** @type {undefined | ModuleGraphConnection} */
let foundConnection;
for (const connection of mgm._unassignedConnections) {
this._dependencyMap.set(
/** @type {Dependency} */ (connection.dependency),
connection
);
if (connection.dependency === dependency) {
foundConnection = connection;
}
}
mgm._unassignedConnections.length = 0;
if (foundConnection !== undefined) {
return foundConnection;
}
}
}
this._dependencyMap.set(dependency, null);
return;
}
return connection === null ? undefined : connection;
}
/**
* Returns the referenced module.
* @param {Dependency} dependency the dependency to look for a referenced module
* @returns {Module | null} the referenced module
*/
getModule(dependency) {
const connection = this.getConnection(dependency);
return connection !== undefined ? connection.module : null;
}
/**
* Returns the referencing module.
* @param {Dependency} dependency the dependency to look for a referencing module
* @returns {Module | null} the referencing module
*/
getOrigin(dependency) {
const connection = this.getConnection(dependency);
return connection !== undefined ? connection.originModule : null;
}
/**
* Gets resolved origin.
* @param {Dependency} dependency the dependency to look for a referencing module
* @returns {Module | null} the original referencing module
*/
getResolvedOrigin(dependency) {
const connection = this.getConnection(dependency);
return connection !== undefined ? connection.resolvedOriginModule : null;
}
/**
* Gets incoming connections.
* @param {Module} module the module
* @returns {Iterable<ModuleGraphConnection>} reasons why a module is included
*/
getIncomingConnections(module) {
const connections = this._getModuleGraphModule(module).incomingConnections;
return connections;
}
/**
* Gets outgoing connections.
* @param {Module} module the module
* @returns {Iterable<ModuleGraphConnection>} list of outgoing connections
*/
getOutgoingConnections(module) {
const connections = this._getModuleGraphModule(module).outgoingConnections;
return connections === undefined ? EMPTY_SET : connections;
}
/**
* Gets incoming connections by origin module.
* @param {Module} module the module
* @returns {ReadonlyMap<Module | undefined | null, ReadonlyArray<ModuleGraphConnection>>} reasons why a module is included, in a map by source module
*/
getIncomingConnectionsByOriginModule(module) {
const connections = this._getModuleGraphModule(module).incomingConnections;
return connections.getFromUnorderedCache(getConnectionsByOriginModule);
}
/**
* Gets outgoing connections by module.
* @param {Module} module the module
* @returns {ReadonlyMap<Module | undefined, ReadonlyArray<ModuleGraphConnection>> | undefined} connections to modules, in a map by module
*/
getOutgoingConnectionsByModule(module) {
const connections = this._getModuleGraphModule(module).outgoingConnections;
return connections === undefined
? undefined
: connections.getFromUnorderedCache(getConnectionsByModule);
}
/**
* Returns the module profile.
* @param {Module} module the module
* @returns {ModuleProfile | undefined} the module profile
*/
getProfile(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.profile;
}
/**
* Updates profile using the provided module.
* @param {Module} module the module
* @param {ModuleProfile | undefined} profile the module profile
* @returns {void}
*/
setProfile(module, profile) {
const mgm = this._getModuleGraphModule(module);
mgm.profile = profile;
}
/**
* Returns the issuer module.
* @param {Module} module the module
* @returns {Issuer} the issuer module
*/
getIssuer(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.issuer;
}
/**
* Updates issuer using the provided module.
* @param {Module} module the module
* @param {Module | null} issuer the issuer module
* @returns {void}
*/
setIssuer(module, issuer) {
const mgm = this._getModuleGraphModule(module);
mgm.issuer = issuer;
}
/**
* Sets issuer if unset.
* @param {Module} module the module
* @param {Module | null} issuer the issuer module
* @returns {void}
*/
setIssuerIfUnset(module, issuer) {
const mgm = this._getModuleGraphModule(module);
if (mgm.issuer === undefined) mgm.issuer = issuer;
}
/**
* Gets optimization bailout.
* @param {Module} module the module
* @returns {OptimizationBailouts} optimization bailouts
*/
getOptimizationBailout(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.optimizationBailout;
}
/**
* Gets provided exports.
* @param {Module} module the module
* @returns {null | true | ExportInfoName[]} the provided exports
*/
getProvidedExports(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.exports.getProvidedExports();
}
/**
* Checks whether this module graph is export provided.
* @param {Module} module the module
* @param {ExportInfoName | ExportInfoName[]} exportName a name of an export
* @returns {boolean | null} true, if the export is provided by the module.
* null, if it's unknown.
* false, if it's not provided.
*/
isExportProvided(module, exportName) {
const mgm = this._getModuleGraphModule(module);
const result = mgm.exports.isExportProvided(exportName);
return result === undefined ? null : result;
}
/**
* Returns info about the exports.
* @param {Module} module the module
* @returns {ExportsInfo} info about the exports
*/
getExportsInfo(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.exports;
}
/**
* Returns info about the export.
* @param {Module} module the module
* @param {string} exportName the export
* @returns {ExportInfo} info about the export
*/
getExportInfo(module, exportName) {
const mgm = this._getModuleGraphModule(module);
return mgm.exports.getExportInfo(exportName);
}
/**
* Gets read only export info.
* @param {Module} module the module
* @param {string} exportName the export
* @returns {ExportInfo} info about the export (do not modify)
*/
getReadOnlyExportInfo(module, exportName) {
const mgm = this._getModuleGraphModule(module);
return mgm.exports.getReadOnlyExportInfo(exportName);
}
/**
* Returns the used exports.
* @param {Module} module the module
* @param {RuntimeSpec} runtime the runtime
* @returns {false | true | SortableSet<string> | null} the used exports
* false: module is not used at all.
* true: the module namespace/object export is used.
* SortableSet<string>: these export names are used.
* empty SortableSet<string>: module is used but no export.
* null: unknown, worst case should be assumed.
*/
getUsedExports(module, runtime) {
const mgm = this._getModuleGraphModule(module);
return mgm.exports.getUsedExports(runtime);
}
/**
* Gets pre order index.
* @param {Module} module the module
* @returns {number | null} the index of the module
*/
getPreOrderIndex(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.preOrderIndex;
}
/**
* Gets post order index.
* @param {Module} module the module
* @returns {number | null} the index of the module
*/
getPostOrderIndex(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.postOrderIndex;
}
/**
* Sets pre order index.
* @param {Module} module the module
* @param {number} index the index of the module
* @returns {void}
*/
setPreOrderIndex(module, index) {
const mgm = this._getModuleGraphModule(module);
mgm.preOrderIndex = index;
}
/**
* Sets pre order index if unset.
* @param {Module} module the module
* @param {number} index the index of the module
* @returns {boolean} true, if the index was set
*/
setPreOrderIndexIfUnset(module, index) {
const mgm = this._getModuleGraphModule(module);
if (mgm.preOrderIndex === null) {
mgm.preOrderIndex = index;
return true;
}
return false;
}
/**
* Sets post order index.
* @param {Module} module the module
* @param {number} index the index of the module
* @returns {void}
*/
setPostOrderIndex(module, index) {
const mgm = this._getModuleGraphModule(module);
mgm.postOrderIndex = index;
}
/**
* Sets post order index if unset.
* @param {Module} module the module
* @param {number} index the index of the module
* @returns {boolean} true, if the index was set
*/
setPostOrderIndexIfUnset(module, index) {
const mgm = this._getModuleGraphModule(module);
if (mgm.postOrderIndex === null) {
mgm.postOrderIndex = index;
return true;
}
return false;
}
/**
* Returns the depth of the module.
* @param {Module} module the module
* @returns {number | null} the depth of the module
*/
getDepth(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.depth;
}
/**
* Updates depth using the provided module.
* @param {Module} module the module
* @param {number} depth the depth of the module
* @returns {void}
*/
setDepth(module, depth) {
const mgm = this._getModuleGraphModule(module);
mgm.depth = depth;
}
/**
* Sets depth if lower.
* @param {Module} module the module
* @param {number} depth the depth of the module
* @returns {boolean} true, if the depth was set
*/
setDepthIfLower(module, depth) {
const mgm = this._getModuleGraphModule(module);
if (mgm.depth === null || mgm.depth > depth) {
mgm.depth = depth;
return true;
}
return false;
}
/**
* Checks whether this module graph is async.
* @param {Module} module the module
* @returns {boolean} true, if the module is async
*/
isAsync(module) {
const mgm = this._getModuleGraphModule(module);
return mgm.async;
}
/**
* Checks whether this module graph is deferred.
* @param {Module} module the module
* @returns {boolean} true, if the module is used as a deferred module at least once
*/
isDeferred(module) {
if (this.isAsync(module)) return false;
const connections = this.getIncomingConnections(module);
for (const connection of connections) {
if (
!connection.dependency ||
!(connection.dependency instanceof HarmonyImportDependency)
) {
continue;
}
if (ImportPhaseUtils.isDefer(connection.dependency.phase)) return true;
}
return false;
}
/**
* Updates async using the provided module.
* @param {Module} module the module
* @returns {void}
*/
setAsync(module) {
const mgm = this._getModuleGraphModule(module);
mgm.async = true;
}
/**
* Returns metadata.
* @param {MetaKey} thing any thing
* @returns {Meta} metadata
*/
getMeta(thing) {
let meta = this._metaMap.get(thing);
if (meta === undefined) {
meta = /** @type {Meta} */ (Object.create(null));
this._metaMap.set(thing, meta);
}
return meta;
}
/**
* Gets meta if existing.
* @param {MetaKey} thing any thing
* @returns {Meta | undefined} metadata
*/
getMetaIfExisting(thing) {
return this._metaMap.get(thing);
}
/**
* Processes the provided cache stage.
* @param {string=} cacheStage a persistent stage name for caching
*/
freeze(cacheStage) {
this._cache = new WeakTupleMap();
this._cacheStage = cacheStage;
}
unfreeze() {
this._cache = undefined;
this._cacheStage = undefined;
}
/**
* Returns computed value or cached.
* @template {EXPECTED_ANY[]} T
* @template R
* @param {(moduleGraph: ModuleGraph, ...args: T) => R} fn computer
* @param {T} args arguments
* @returns {R} computed value or cached
*/
cached(fn, ...args) {
if (this._cache === undefined) return fn(this, ...args);
return this._cache.provide(fn, ...args, () => fn(this, ...args));
}
/**
* Sets module mem caches.
* @param {ModuleMemCaches} moduleMemCaches mem caches for modules for better caching
*/
setModuleMemCaches(moduleMemCaches) {
this._moduleMemCaches = moduleMemCaches;
}
/**
* Dependency cache provide.
* @template {Dependency} D
* @template {EXPECTED_ANY[]} ARGS
* @template R
* @param {D} dependency dependency
* @param {[...ARGS, (moduleGraph: ModuleGraph, dependency: D, ...args: ARGS) => R]} args arguments, last argument is a function called with moduleGraph, dependency, ...args