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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 SortableSet = require("./util/SortableSet");
const intersect = require("./util/SetHelpers").intersect;
const GraphHelpers = require("./GraphHelpers");
const Entrypoint = require("./Entrypoint");
let debugId = 1000;
const ERR_CHUNK_ENTRY = "Chunk.entry was removed. Use hasRuntime()";
const ERR_CHUNK_INITIAL =
"Chunk.initial was removed. Use canBeInitial/isOnlyInitial()";
/** @typedef {import("./Module")} Module */
/** @typedef {import("./ChunkGroup")} ChunkGroup */
/** @typedef {import("./ModuleReason")} ModuleReason */
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("./util/createHash").Hash} Hash */
/**
* @typedef {Object} WithId an object who has an id property *
* @property {string | number} id the id of the object
*/
/**
* Compare two Modules based on their ids for sorting
* @param {Module} a module
* @param {Module} b module
* @returns {-1|0|1} sort value
*/
// TODO use @callback
/** @typedef {(a: Module, b: Module) => -1|0|1} ModuleSortPredicate */
/** @typedef {(m: Module) => boolean} ModuleFilterPredicate */
/** @typedef {(c: Chunk) => boolean} ChunkFilterPredicate */
const sortModuleById = (a, b) => {
if (a.id < b.id) return -1;
if (b.id < a.id) return 1;
return 0;
};
/**
* Compare two ChunkGroups based on their ids for sorting
* @param {ChunkGroup} a chunk group
* @param {ChunkGroup} b chunk group
* @returns {-1|0|1} sort value
*/
const sortChunkGroupById = (a, b) => {
if (a.id < b.id) return -1;
if (b.id < a.id) return 1;
return 0;
};
/**
* Compare two Identifiables , based on their ids for sorting
* @param {Module} a first object with ident fn
* @param {Module} b second object with ident fn
* @returns {-1|0|1} The order number of the sort
*/
const sortByIdentifier = (a, b) => {
if (a.identifier() > b.identifier()) return 1;
if (a.identifier() < b.identifier()) return -1;
return 0;
};
/**
* @returns {string} a concatenation of module identifiers sorted
* @param {SortableSet} set to pull module identifiers from
*/
const getModulesIdent = set => {
set.sort();
let str = "";
for (const m of set) {
str += m.identifier() + "#";
}
return str;
};
/**
* @template T
* @param {SortableSet<T>} set the sortable set to convert to array
* @returns {Array<T>} the array returned from Array.from(set)
*/
const getArray = set => Array.from(set);
/**
* @param {SortableSet<Module>} set the sortable Set to get the count/size of
* @returns {number} the size of the modules
*/
const getModulesSize = set => {
let size = 0;
for (const module of set) {
size += module.size();
}
return size;
};
/**
* A Chunk is a unit of encapsulation for Modules.
* Chunks are "rendered" into bundles that get emitted when the build completes.
*/
class Chunk {
/**
* @param {string=} name of chunk being created, is optional (for subclasses)
*/
constructor(name) {
/** @type {number | null} */
this.id = null;
/** @type {number[] | null} */
this.ids = null;
/** @type {number} */
this.debugId = debugId++;
/** @type {string} */
this.name = name;
/** @type {boolean} */
this.preventIntegration = false;
/** @type {Module=} */
this.entryModule = undefined;
/** @private @type {SortableSet<Module>} */
this._modules = new SortableSet(undefined, sortByIdentifier);
/** @type {string?} */
this.filenameTemplate = undefined;
/** @private @type {SortableSet<ChunkGroup>} */
this._groups = new SortableSet(undefined, sortChunkGroupById);
/** @type {string[]} */
this.files = [];
/** @type {boolean} */
this.rendered = false;
/** @type {string=} */
this.hash = undefined;
/** @type {Object} */
this.contentHash = Object.create(null);
/** @type {string=} */
this.renderedHash = undefined;
/** @type {string=} */
this.chunkReason = undefined;
/** @type {boolean} */
this.extraAsync = false;
this.removedModules = undefined;
}
/**
* @deprecated Chunk.entry has been deprecated. Please use .hasRuntime() instead
* @returns {never} Throws an error trying to access this property
*/
get entry() {
throw new Error(ERR_CHUNK_ENTRY);
}
/**
* @deprecated .entry has been deprecated. Please use .hasRuntime() instead
* @param {never} data The data that was attempting to be set
* @returns {never} Throws an error trying to access this property
*/
set entry(data) {
throw new Error(ERR_CHUNK_ENTRY);
}
/**
* @deprecated Chunk.initial was removed. Use canBeInitial/isOnlyInitial()
* @returns {never} Throws an error trying to access this property
*/
get initial() {
throw new Error(ERR_CHUNK_INITIAL);
}
/**
* @deprecated Chunk.initial was removed. Use canBeInitial/isOnlyInitial()
* @param {never} data The data attempting to be set
* @returns {never} Throws an error trying to access this property
*/
set initial(data) {
throw new Error(ERR_CHUNK_INITIAL);
}
/**
* @returns {boolean} whether or not the Chunk will have a runtime
*/
hasRuntime() {
for (const chunkGroup of this._groups) {
if (
chunkGroup.isInitial() &&
chunkGroup instanceof Entrypoint &&
chunkGroup.getRuntimeChunk() === this
) {
return true;
}
}
return false;
}
/**
* @returns {boolean} whether or not this chunk can be an initial chunk
*/
canBeInitial() {
for (const chunkGroup of this._groups) {
if (chunkGroup.isInitial()) return true;
}
return false;
}
/**
* @returns {boolean} whether this chunk can only be an initial chunk
*/
isOnlyInitial() {
if (this._groups.size <= 0) return false;
for (const chunkGroup of this._groups) {
if (!chunkGroup.isInitial()) return false;
}
return true;
}
/**
* @returns {boolean} if this chunk contains the entry module
*/
hasEntryModule() {
return !!this.entryModule;
}
/**
* @param {Module} module the module that will be added to this chunk.
* @returns {boolean} returns true if the chunk doesn't have the module and it was added
*/
addModule(module) {
if (!this._modules.has(module)) {
this._modules.add(module);
return true;
}
return false;
}
/**
* @param {Module} module the module that will be removed from this chunk
* @returns {boolean} returns true if chunk exists and is successfully deleted
*/
removeModule(module) {
if (this._modules.delete(module)) {
module.removeChunk(this);
return true;
}
return false;
}
/**
* @param {Module[]} modules the new modules to be set
* @returns {void} set new modules to this chunk and return nothing
*/
setModules(modules) {
this._modules = new SortableSet(modules, sortByIdentifier);
}
/**
* @returns {number} the amount of modules in chunk
*/
getNumberOfModules() {
return this._modules.size;
}
/**
* @returns {SortableSet} return the modules SortableSet for this chunk
*/
get modulesIterable() {
return this._modules;
}
/**
* @param {ChunkGroup} chunkGroup the chunkGroup the chunk is being added
* @returns {boolean} returns true if chunk is not apart of chunkGroup and is added successfully
*/
addGroup(chunkGroup) {
if (this._groups.has(chunkGroup)) return false;
this._groups.add(chunkGroup);
return true;
}
/**
* @param {ChunkGroup} chunkGroup the chunkGroup the chunk is being removed from
* @returns {boolean} returns true if chunk does exist in chunkGroup and is removed
*/
removeGroup(chunkGroup) {
if (!this._groups.has(chunkGroup)) return false;
this._groups.delete(chunkGroup);
return true;
}
/**
* @param {ChunkGroup} chunkGroup the chunkGroup to check
* @returns {boolean} returns true if chunk has chunkGroup reference and exists in chunkGroup
*/
isInGroup(chunkGroup) {
return this._groups.has(chunkGroup);
}
/**
* @returns {number} the amount of groups said chunk is in
*/
getNumberOfGroups() {
return this._groups.size;
}
/**
* @returns {SortableSet<ChunkGroup>} the chunkGroups that said chunk is referenced in
*/
get groupsIterable() {
return this._groups;
}
/**
* @param {Chunk} otherChunk the chunk to compare itself with
* @returns {-1|0|1} this is a comparitor function like sort and returns -1, 0, or 1 based on sort order
*/
compareTo(otherChunk) {
if (this.name && !otherChunk.name) return -1;
if (!this.name && otherChunk.name) return 1;
if (this.name < otherChunk.name) return -1;
if (this.name > otherChunk.name) return 1;
if (this._modules.size > otherChunk._modules.size) return -1;
if (this._modules.size < otherChunk._modules.size) return 1;
this._modules.sort();
otherChunk._modules.sort();
const a = this._modules[Symbol.iterator]();
const b = otherChunk._modules[Symbol.iterator]();
// eslint-disable-next-line no-constant-condition
while (true) {
const aItem = a.next();
if (aItem.done) return 0;
const bItem = b.next();
const aModuleIdentifier = aItem.value.identifier();
const bModuleIdentifier = bItem.value.identifier();
if (aModuleIdentifier < bModuleIdentifier) return -1;
if (aModuleIdentifier > bModuleIdentifier) return 1;
}
}
/**
* @param {Module} module Module to check
* @returns {boolean} returns true if module does exist in this chunk
*/
containsModule(module) {
return this._modules.has(module);
}
/**
* @returns {Module[]} an array of modules (do not modify)
*/
getModules() {
return this._modules.getFromCache(getArray);
}
getModulesIdent() {
return this._modules.getFromUnorderedCache(getModulesIdent);
}
/**
* @param {string=} reason reason why chunk is removed
* @returns {void}
*/
remove(reason) {
// cleanup modules
// Array.from is used here to create a clone, because removeChunk modifies this._modules
for (const module of Array.from(this._modules)) {
module.removeChunk(this);
}
for (const chunkGroup of this._groups) {
chunkGroup.removeChunk(this);
}
}
/**
*
* @param {Module} module module to move
* @param {Chunk} otherChunk other chunk to move it to
* @returns {void}
*/
moveModule(module, otherChunk) {
GraphHelpers.disconnectChunkAndModule(this, module);
GraphHelpers.connectChunkAndModule(otherChunk, module);
module.rewriteChunkInReasons(this, [otherChunk]);
}
/**
*
* @param {Chunk} otherChunk the chunk to integrate with
* @param {string} reason reason why the module is being integrated
* @returns {boolean} returns true or false if integration succeeds or fails
*/
integrate(otherChunk, reason) {
if (!this.canBeIntegrated(otherChunk)) {
return false;
}
// Pick a new name for the integrated chunk
if (this.name && otherChunk.name) {
if (this.hasEntryModule() === otherChunk.hasEntryModule()) {
// When both chunks have entry modules or none have one, use
// shortest name
if (this.name.length !== otherChunk.name.length) {
this.name =
this.name.length < otherChunk.name.length
? this.name
: otherChunk.name;
} else {
this.name = this.name < otherChunk.name ? this.name : otherChunk.name;
}
} else if (otherChunk.hasEntryModule()) {
// Pick the name of the chunk with the entry module
this.name = otherChunk.name;
}
} else if (otherChunk.name) {
this.name = otherChunk.name;
}
// Array.from is used here to create a clone, because moveModule modifies otherChunk._modules
for (const module of Array.from(otherChunk._modules)) {
otherChunk.moveModule(module, this);
}
otherChunk._modules.clear();
if (otherChunk.entryModule) {
this.entryModule = otherChunk.entryModule;
}
for (const chunkGroup of otherChunk._groups) {
chunkGroup.replaceChunk(otherChunk, this);
this.addGroup(chunkGroup);
}
otherChunk._groups.clear();
return true;
}
/**
* @param {Chunk} newChunk the new chunk that will be split out of the current chunk
* @returns {void}
*/
split(newChunk) {
for (const chunkGroup of this._groups) {
chunkGroup.insertChunk(newChunk, this);
newChunk.addGroup(chunkGroup);
}
}
isEmpty() {
return this._modules.size === 0;
}
updateHash(hash) {
hash.update(`${this.id} `);
hash.update(this.ids ? this.ids.join(",") : "");
hash.update(`${this.name || ""} `);
for (const m of this._modules) {
hash.update(m.hash);
}
}
canBeIntegrated(otherChunk) {
if (this.preventIntegration || otherChunk.preventIntegration) {
return false;
}
/**
* @param {Chunk} a chunk
* @param {Chunk} b chunk
* @returns {boolean} true, if a is always available when b is reached
*/
const isAvailable = (a, b) => {
const queue = new Set(b.groupsIterable);
for (const chunkGroup of queue) {
if (a.isInGroup(chunkGroup)) continue;
if (chunkGroup.isInitial()) return false;
for (const parent of chunkGroup.parentsIterable) {
queue.add(parent);
}
}
return true;
};
const selfHasRuntime = this.hasRuntime();
const otherChunkHasRuntime = otherChunk.hasRuntime();
if (selfHasRuntime !== otherChunkHasRuntime) {
if (selfHasRuntime) {
return isAvailable(this, otherChunk);
} else if (otherChunkHasRuntime) {
return isAvailable(otherChunk, this);
} else {
return false;
}
}
if (this.hasEntryModule() || otherChunk.hasEntryModule()) {
return false;
}
return true;
}
/**
*
* @param {number} size the size
* @param {Object} options the options passed in
* @returns {number} the multiplier returned
*/
addMultiplierAndOverhead(size, options) {
const overhead =
typeof options.chunkOverhead === "number" ? options.chunkOverhead : 10000;
const multiplicator = this.canBeInitial()
? options.entryChunkMultiplicator || 10
: 1;
return size * multiplicator + overhead;
}
/**
* @returns {number} the size of all modules
*/
modulesSize() {
return this._modules.getFromUnorderedCache(getModulesSize);
}
/**
* @param {Object} options the size display options
* @returns {number} the chunk size
*/
size(options = {}) {
return this.addMultiplierAndOverhead(this.modulesSize(), options);
}
/**
* @param {Chunk} otherChunk the other chunk
* @param {TODO} options the options for this function
* @returns {number | false} the size, or false if it can't be integrated
*/
integratedSize(otherChunk, options) {
// Chunk if it's possible to integrate this chunk
if (!this.canBeIntegrated(otherChunk)) {
return false;
}
let integratedModulesSize = this.modulesSize();
// only count modules that do not exist in this chunk!
for (const otherModule of otherChunk._modules) {
if (!this._modules.has(otherModule)) {
integratedModulesSize += otherModule.size();
}
}
return this.addMultiplierAndOverhead(integratedModulesSize, options);
}
/**
* @param {function(Module, Module): -1|0|1=} sortByFn a predicate function used to sort modules
* @returns {void}
*/
sortModules(sortByFn) {
this._modules.sortWith(sortByFn || sortModuleById);
}
sortItems() {
this.sortModules();
}
/**
* @returns {Set<Chunk>} a set of all the async chunks
*/
getAllAsyncChunks() {
const queue = new Set();
const chunks = new Set();
const initialChunks = intersect(
Array.from(this.groupsIterable, g => new Set(g.chunks))
);
for (const chunkGroup of this.groupsIterable) {
for (const child of chunkGroup.childrenIterable) {
queue.add(child);
}
}
for (const chunkGroup of queue) {
for (const chunk of chunkGroup.chunks) {
if (!initialChunks.has(chunk)) {
chunks.add(chunk);
}
}
for (const child of chunkGroup.childrenIterable) {
queue.add(child);
}
}
return chunks;
}
/**
* @typedef {Object} ChunkMaps
* @property {Record<string|number, string>} hash
* @property {Record<string|number, Record<string, string>>} contentHash
* @property {Record<string|number, string>} name
*/
/**
* @param {boolean} realHash should the full hash or the rendered hash be used
* @returns {ChunkMaps} the chunk map information
*/
getChunkMaps(realHash) {
/** @type {Record<string|number, string>} */
const chunkHashMap = Object.create(null);
/** @type {Record<string|number, Record<string, string>>} */
const chunkContentHashMap = Object.create(null);
/** @type {Record<string|number, string>} */
const chunkNameMap = Object.create(null);
for (const chunk of this.getAllAsyncChunks()) {
chunkHashMap[chunk.id] = realHash ? chunk.hash : chunk.renderedHash;
for (const key of Object.keys(chunk.contentHash)) {
if (!chunkContentHashMap[key]) {
chunkContentHashMap[key] = Object.create(null);
}
chunkContentHashMap[key][chunk.id] = chunk.contentHash[key];
}
if (chunk.name) {
chunkNameMap[chunk.id] = chunk.name;
}
}
return {
hash: chunkHashMap,
contentHash: chunkContentHashMap,
name: chunkNameMap
};
}
/**
* @returns {Record<string, Set<TODO>[]>} a record object of names to lists of child ids(?)
*/
getChildIdsByOrders() {
const lists = new Map();
for (const group of this.groupsIterable) {
if (group.chunks[group.chunks.length - 1] === this) {
for (const childGroup of group.childrenIterable) {
// TODO webpack 5 remove this check for options
if (typeof childGroup.options === "object") {
for (const key of Object.keys(childGroup.options)) {
if (key.endsWith("Order")) {
const name = key.substr(0, key.length - "Order".length);
let list = lists.get(name);
if (list === undefined) lists.set(name, (list = []));
list.push({
order: childGroup.options[key],
group: childGroup
});
}
}
}
}
}
}
const result = Object.create(null);
for (const [name, list] of lists) {
list.sort((a, b) => {
const cmp = b.order - a.order;
if (cmp !== 0) return cmp;
// TODO webpack 5 remove this check of compareTo
if (a.group.compareTo) {
return a.group.compareTo(b.group);
}
return 0;
});
result[name] = Array.from(
list.reduce((set, item) => {
for (const chunk of item.group.chunks) {
set.add(chunk.id);
}
return set;
}, new Set())
);
}
return result;
}
getChildIdsByOrdersMap(includeDirectChildren) {
const chunkMaps = Object.create(null);
const addChildIdsByOrdersToMap = chunk => {
const data = chunk.getChildIdsByOrders();
for (const key of Object.keys(data)) {
let chunkMap = chunkMaps[key];
if (chunkMap === undefined) {
chunkMaps[key] = chunkMap = Object.create(null);
}
chunkMap[chunk.id] = data[key];
}
};
if (includeDirectChildren) {
const chunks = new Set();
for (const chunkGroup of this.groupsIterable) {
for (const chunk of chunkGroup.chunks) {
chunks.add(chunk);
}
}
for (const chunk of chunks) {
addChildIdsByOrdersToMap(chunk);
}
}
for (const chunk of this.getAllAsyncChunks()) {
addChildIdsByOrdersToMap(chunk);
}
return chunkMaps;
}
/**
* @typedef {Object} ChunkModuleMaps
* @property {Record<string|number, (string|number)[]>} id
* @property {Record<string|number, string>} hash
*/
/**
* @param {ModuleFilterPredicate} filterFn function used to filter modules
* @returns {ChunkModuleMaps} module map information
*/
getChunkModuleMaps(filterFn) {
/** @type {Record<string|number, (string|number)[]>} */
const chunkModuleIdMap = Object.create(null);
/** @type {Record<string|number, string>} */
const chunkModuleHashMap = Object.create(null);
for (const chunk of this.getAllAsyncChunks()) {
/** @type {(string|number)[]} */
let array;
for (const module of chunk.modulesIterable) {
if (filterFn(module)) {
if (array === undefined) {
array = [];
chunkModuleIdMap[chunk.id] = array;
}
array.push(module.id);
chunkModuleHashMap[module.id] = module.renderedHash;
}
}
if (array !== undefined) {
array.sort();
}
}
return {
id: chunkModuleIdMap,
hash: chunkModuleHashMap
};
}
/**
*
* @param {function(Module): boolean} filterFn predicate function used to filter modules
* @param {function(Chunk): boolean} filterChunkFn predicate function used to filter chunks
* @returns {boolean} return true if module exists in graph
*/
hasModuleInGraph(filterFn, filterChunkFn) {
const queue = new Set(this.groupsIterable);
const chunksProcessed = new Set();
for (const chunkGroup of queue) {
for (const chunk of chunkGroup.chunks) {
if (!chunksProcessed.has(chunk)) {
chunksProcessed.add(chunk);
if (!filterChunkFn || filterChunkFn(chunk)) {
for (const module of chunk.modulesIterable) {
if (filterFn(module)) {
return true;
}
}
}
}
}
for (const child of chunkGroup.childrenIterable) {
queue.add(child);
}
}
return false;
}
toString() {
return `Chunk[${Array.from(this._modules).join()}]`;
}
}
// TODO remove in webpack 5
Object.defineProperty(Chunk.prototype, "forEachModule", {
configurable: false,
value: util.deprecate(
/**
* @deprecated
* @this {Chunk}
* @typedef {function(any, any, Set<any>): void} ForEachModuleCallback
* @param {ForEachModuleCallback} fn Callback function
* @returns {void}
*/
function(fn) {
this._modules.forEach(fn);
},
"Chunk.forEachModule: Use for(const module of chunk.modulesIterable) instead"
)
});
// TODO remove in webpack 5
Object.defineProperty(Chunk.prototype, "mapModules", {
configurable: false,
value: util.deprecate(
/**
* @deprecated
* @this {Chunk}
* @typedef {function(any, number): any} MapModulesCallback
* @param {MapModulesCallback} fn Callback function
* @returns {TODO[]} result of mapped modules
*/
function(fn) {
return Array.from(this._modules, fn);
},
"Chunk.mapModules: Use Array.from(chunk.modulesIterable, fn) instead"
)
});
// TODO remove in webpack 5
Object.defineProperty(Chunk.prototype, "chunks", {
configurable: false,
get() {
throw new Error("Chunk.chunks: Use ChunkGroup.getChildren() instead");
},
set() {
throw new Error("Chunk.chunks: Use ChunkGroup.add/removeChild() instead");
}
});
// TODO remove in webpack 5
Object.defineProperty(Chunk.prototype, "parents", {
configurable: false,
get() {
throw new Error("Chunk.parents: Use ChunkGroup.getParents() instead");
},
set() {
throw new Error("Chunk.parents: Use ChunkGroup.add/removeParent() instead");
}
});
// TODO remove in webpack 5
Object.defineProperty(Chunk.prototype, "blocks", {
configurable: false,
get() {
throw new Error("Chunk.blocks: Use ChunkGroup.getBlocks() instead");
},
set() {
throw new Error("Chunk.blocks: Use ChunkGroup.add/removeBlock() instead");
}
});
// TODO remove in webpack 5
Object.defineProperty(Chunk.prototype, "entrypoints", {
configurable: false,
get() {
throw new Error(
"Chunk.entrypoints: Use Chunks.groupsIterable and filter by instanceof Entrypoint instead"
);
},
set() {
throw new Error("Chunk.entrypoints: Use Chunks.addGroup instead");
}
});
module.exports = Chunk;