webpack/lib/Compilation.js

1720 lines
49 KiB
JavaScript

/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const asyncLib = require("neo-async");
const util = require("util");
const Tapable = require("tapable").Tapable;
const SyncHook = require("tapable").SyncHook;
const SyncBailHook = require("tapable").SyncBailHook;
const SyncWaterfallHook = require("tapable").SyncWaterfallHook;
const AsyncSeriesHook = require("tapable").AsyncSeriesHook;
const EntryModuleNotFoundError = require("./EntryModuleNotFoundError");
const ModuleNotFoundError = require("./ModuleNotFoundError");
const ModuleDependencyWarning = require("./ModuleDependencyWarning");
const ModuleDependencyError = require("./ModuleDependencyError");
const ChunkGroup = require("./ChunkGroup");
const Chunk = require("./Chunk");
const Entrypoint = require("./Entrypoint");
const MainTemplate = require("./MainTemplate");
const ChunkTemplate = require("./ChunkTemplate");
const HotUpdateChunkTemplate = require("./HotUpdateChunkTemplate");
const ModuleTemplate = require("./ModuleTemplate");
const RuntimeTemplate = require("./RuntimeTemplate");
const Dependency = require("./Dependency");
const ChunkRenderError = require("./ChunkRenderError");
const AsyncDependencyToInitialChunkError = require("./AsyncDependencyToInitialChunkError");
const CachedSource = require("webpack-sources").CachedSource;
const Stats = require("./Stats");
const Semaphore = require("./util/Semaphore");
const createHash = require("./util/createHash");
const Queue = require("./util/Queue");
const SortableSet = require("./util/SortableSet");
const GraphHelpers = require("./GraphHelpers");
const byId = (a, b) => {
if(a.id < b.id) return -1;
if(a.id > b.id) return 1;
return 0;
};
const byIdOrIdentifier = (a, b) => {
if(a.id < b.id) return -1;
if(a.id > b.id) return 1;
const identA = a.identifier();
const identB = b.identifier();
if(identA < identB) return -1;
if(identA > identB) return 1;
return 0;
};
const byIndexOrIdentifier = (a, b) => {
if(a.index < b.index) return -1;
if(a.index > b.index) return 1;
const identA = a.identifier();
const identB = b.identifier();
if(identA < identB) return -1;
if(identA > identB) return 1;
return 0;
};
const iterationBlockVariable = (variables, fn) => {
for(let indexVariable = 0; indexVariable < variables.length; indexVariable++) {
const varDep = variables[indexVariable].dependencies;
for(let indexVDep = 0; indexVDep < varDep.length; indexVDep++) {
fn(varDep[indexVDep]);
}
}
};
const iterationOfArrayCallback = (arr, fn) => {
for(let index = 0; index < arr.length; index++) {
fn(arr[index]);
}
};
function addAllToSet(set, otherSet) {
for(const item of otherSet) {
set.add(item);
}
}
class Compilation extends Tapable {
constructor(compiler) {
super();
this.hooks = {
buildModule: new SyncHook(["module"]),
rebuildModule: new SyncHook(["module"]),
failedModule: new SyncHook(["module", "error"]),
succeedModule: new SyncHook(["module"]),
finishModules: new SyncHook(["modules"]),
finishRebuildingModule: new SyncHook(["module"]),
unseal: new SyncHook([]),
seal: new SyncHook([]),
optimizeDependenciesBasic: new SyncBailHook(["modules"]),
optimizeDependencies: new SyncBailHook(["modules"]),
optimizeDependenciesAdvanced: new SyncBailHook(["modules"]),
afterOptimizeDependencies: new SyncHook(["modules"]),
optimize: new SyncHook([]),
optimizeModulesBasic: new SyncBailHook(["modules"]),
optimizeModules: new SyncBailHook(["modules"]),
optimizeModulesAdvanced: new SyncBailHook(["modules"]),
afterOptimizeModules: new SyncHook(["modules"]),
optimizeChunksBasic: new SyncBailHook(["chunks", "chunkGroups"]),
optimizeChunks: new SyncBailHook(["chunks", "chunkGroups"]),
optimizeChunksAdvanced: new SyncBailHook(["chunks", "chunkGroups"]),
afterOptimizeChunks: new SyncHook(["chunks", "chunkGroups"]),
optimizeTree: new AsyncSeriesHook(["chunks", "modules"]),
afterOptimizeTree: new SyncHook(["chunks", "modules"]),
optimizeChunkModulesBasic: new SyncBailHook(["chunks", "modules"]),
optimizeChunkModules: new SyncBailHook(["chunks", "modules"]),
optimizeChunkModulesAdvanced: new SyncBailHook(["chunks", "modules"]),
afterOptimizeChunkModules: new SyncHook(["chunks", "modules"]),
shouldRecord: new SyncBailHook([]),
reviveModules: new SyncHook(["modules", "records"]),
optimizeModuleOrder: new SyncHook(["modules"]),
advancedOptimizeModuleOrder: new SyncHook(["modules"]),
beforeModuleIds: new SyncHook(["modules"]),
moduleIds: new SyncHook(["modules"]),
optimizeModuleIds: new SyncHook(["modules"]),
afterOptimizeModuleIds: new SyncHook(["modules"]),
reviveChunks: new SyncHook(["chunks", "records"]),
optimizeChunkOrder: new SyncHook(["chunks"]),
beforeChunkIds: new SyncHook(["chunks"]),
optimizeChunkIds: new SyncHook(["chunks"]),
afterOptimizeChunkIds: new SyncHook(["chunks"]),
recordModules: new SyncHook(["modules", "records"]),
recordChunks: new SyncHook(["chunks", "records"]),
beforeHash: new SyncHook([]),
afterHash: new SyncHook([]),
recordHash: new SyncHook(["records"]),
record: new SyncHook(["compilation", "records"]),
beforeModuleAssets: new SyncHook([]),
shouldGenerateChunkAssets: new SyncBailHook([]),
beforeChunkAssets: new SyncHook([]),
additionalChunkAssets: new SyncHook(["chunks"]),
records: new SyncHook(["compilation", "records"]),
additionalAssets: new AsyncSeriesHook([]),
optimizeChunkAssets: new AsyncSeriesHook(["chunks"]),
afterOptimizeChunkAssets: new SyncHook(["chunks"]),
optimizeAssets: new AsyncSeriesHook(["assets"]),
afterOptimizeAssets: new SyncHook(["assets"]),
needAdditionalSeal: new SyncBailHook([]),
afterSeal: new AsyncSeriesHook([]),
chunkHash: new SyncHook(["chunk", "chunkHash"]),
moduleAsset: new SyncHook(["module", "filename"]),
chunkAsset: new SyncHook(["chunk", "filename"]),
assetPath: new SyncWaterfallHook(["filename", "data"]), // TODO MainTemplate
needAdditionalPass: new SyncBailHook([]),
childCompiler: new SyncHook(["childCompiler", "compilerName", "compilerIndex"]),
// TODO the following hooks are weirdly located here
// TODO move them for webpack 5
normalModuleLoader: new SyncHook(["loaderContext", "module"]),
optimizeExtractedChunksBasic: new SyncBailHook(["chunks"]),
optimizeExtractedChunks: new SyncBailHook(["chunks"]),
optimizeExtractedChunksAdvanced: new SyncBailHook(["chunks"]),
afterOptimizeExtractedChunks: new SyncHook(["chunks"]),
};
this._pluginCompat.tap("Compilation", options => {
switch(options.name) {
case "optimize-tree":
case "additional-assets":
case "optimize-chunk-assets":
case "optimize-assets":
case "after-seal":
options.async = true;
break;
}
});
this.compiler = compiler;
this.resolverFactory = compiler.resolverFactory;
this.inputFileSystem = compiler.inputFileSystem;
this.requestShortener = compiler.requestShortener;
const options = this.options = compiler.options;
this.outputOptions = options && options.output;
this.bail = options && options.bail;
this.profile = options && options.profile;
this.performance = options && options.performance;
this.mainTemplate = new MainTemplate(this.outputOptions);
this.chunkTemplate = new ChunkTemplate(this.outputOptions);
this.hotUpdateChunkTemplate = new HotUpdateChunkTemplate(this.outputOptions);
this.runtimeTemplate = new RuntimeTemplate(this.outputOptions, this.requestShortener);
this.moduleTemplates = {
javascript: new ModuleTemplate(this.runtimeTemplate),
webassembly: new ModuleTemplate(this.runtimeTemplate)
};
this.semaphore = new Semaphore(options.parallelism || 100);
this.entries = [];
this._preparedEntrypoints = [];
this.entrypoints = new Map();
this.chunks = [];
this.chunkGroups = [];
this.namedChunkGroups = new Map();
this.namedChunks = new Map();
this.modules = [];
this._modules = new Map();
this.cache = null;
this.records = null;
this.nextFreeModuleIndex = undefined;
this.nextFreeModuleIndex2 = undefined;
this.additionalChunkAssets = [];
this.assets = {};
this.errors = [];
this.warnings = [];
this.children = [];
this.dependencyFactories = new Map();
this.dependencyTemplates = new Map();
this.dependencyTemplates.set("hash", "");
this.childrenCounters = {};
this.usedChunkIds = null;
this.usedModuleIds = null;
this._buildingModules = new Map();
this._rebuildingModules = new Map();
}
getStats() {
return new Stats(this);
}
addModule(module, cacheGroup) {
const identifier = module.identifier();
const alreadyAddedModule = this._modules.get(identifier);
if(alreadyAddedModule) {
return {
module: alreadyAddedModule,
issuer: false,
build: false,
dependencies: false
};
}
const cacheName = (cacheGroup || "m") + identifier;
if(this.cache && this.cache[cacheName]) {
const cacheModule = this.cache[cacheName];
let rebuild = true;
if(this.fileTimestamps && this.contextTimestamps) {
rebuild = cacheModule.needRebuild(this.fileTimestamps, this.contextTimestamps);
}
if(!rebuild) {
cacheModule.disconnect();
this._modules.set(identifier, cacheModule);
this.modules.push(cacheModule);
for(const err of cacheModule.errors) this.errors.push(err);
for(const err of cacheModule.warnings) this.warnings.push(err);
return {
module: cacheModule,
issuer: true,
build: false,
dependencies: true
};
}
cacheModule.unbuild();
module = cacheModule;
}
this._modules.set(identifier, module);
if(this.cache) {
this.cache[cacheName] = module;
}
this.modules.push(module);
return {
module: module,
issuer: true,
build: true,
dependencies: true
};
}
getModule(module) {
const identifier = module.identifier();
return this._modules.get(identifier);
}
findModule(identifier) {
return this._modules.get(identifier);
}
waitForBuildingFinished(module, callback) {
let callbackList = this._buildingModules.get(module);
if(callbackList) {
callbackList.push(() => callback());
} else {
process.nextTick(callback);
}
}
buildModule(module, optional, origin, dependencies, thisCallback) {
let callbackList = this._buildingModules.get(module);
if(callbackList) {
callbackList.push(thisCallback);
return;
}
this._buildingModules.set(module, callbackList = [thisCallback]);
const callback = err => {
this._buildingModules.delete(module);
for(const cb of callbackList) cb(err);
};
this.hooks.buildModule.call(module);
module.build(this.options, this, this.resolverFactory.get("normal", module.resolveOptions), this.inputFileSystem, (error) => {
const errors = module.errors;
for(let indexError = 0; indexError < errors.length; indexError++) {
const err = errors[indexError];
err.origin = origin;
err.dependencies = dependencies;
if(optional)
this.warnings.push(err);
else
this.errors.push(err);
}
const warnings = module.warnings;
for(let indexWarning = 0; indexWarning < warnings.length; indexWarning++) {
const war = warnings[indexWarning];
war.origin = origin;
war.dependencies = dependencies;
this.warnings.push(war);
}
module.dependencies.sort(Dependency.compare);
if(error) {
this.hooks.failedModule.call(module, error);
return callback(error);
}
this.hooks.succeedModule.call(module);
return callback();
});
}
processModuleDependencies(module, callback) {
const dependencies = new Map();
const addDependency = dep => {
const resourceIdent = dep.getResourceIdentifier();
if(resourceIdent) {
const factory = this.dependencyFactories.get(dep.constructor);
if(factory === undefined)
throw new Error(`No module factory available for dependency type: ${dep.constructor.name}`);
let innerMap = dependencies.get(factory);
if(innerMap === undefined)
dependencies.set(factory, innerMap = new Map());
let list = innerMap.get(resourceIdent);
if(list === undefined)
innerMap.set(resourceIdent, list = []);
list.push(dep);
}
};
const addDependenciesBlock = block => {
if(block.dependencies) {
iterationOfArrayCallback(block.dependencies, addDependency);
}
if(block.blocks) {
iterationOfArrayCallback(block.blocks, addDependenciesBlock);
}
if(block.variables) {
iterationBlockVariable(block.variables, addDependency);
}
};
try {
addDependenciesBlock(module);
} catch(e) {
callback(e);
}
const sortedDependencies = [];
for(const pair1 of dependencies) {
for(const pair2 of pair1[1]) {
sortedDependencies.push({
factory: pair1[0],
dependencies: pair2[1]
});
}
}
this.addModuleDependencies(module, sortedDependencies, this.bail, null, true, callback);
}
addModuleDependencies(module, dependencies, bail, cacheGroup, recursive, callback) {
let _this = this;
const start = _this.profile && Date.now();
const currentProfile = _this.profile && {};
asyncLib.forEach(dependencies, (item, callback) => {
const dependencies = item.dependencies;
const errorAndCallback = err => {
err.origin = module;
_this.errors.push(err);
if(bail) {
callback(err);
} else {
callback();
}
};
const warningAndCallback = err => {
err.origin = module;
_this.warnings.push(err);
callback();
};
const semaphore = _this.semaphore;
semaphore.acquire(() => {
if(_this === null) return semaphore.release();
const factory = item.factory;
factory.create({
contextInfo: {
issuer: module.nameForCondition && module.nameForCondition(),
compiler: _this.compiler.name
},
resolveOptions: module.resolveOptions,
context: module.context,
dependencies: dependencies
}, (err, dependentModule) => {
if(_this === null) return semaphore.release();
let afterFactory;
const isOptional = () => {
return dependencies.every(d => d.optional);
};
const errorOrWarningAndCallback = err => {
if(isOptional()) {
return warningAndCallback(err);
} else {
return errorAndCallback(err);
}
};
if(err) {
semaphore.release();
return errorOrWarningAndCallback(new ModuleNotFoundError(module, err, dependencies));
}
if(!dependentModule) {
semaphore.release();
return process.nextTick(callback);
}
if(currentProfile) {
afterFactory = Date.now();
currentProfile.factory = afterFactory - start;
}
const iterationDependencies = depend => {
for(let index = 0; index < depend.length; index++) {
const dep = depend[index];
dep.module = dependentModule;
dependentModule.addReason(module, dep);
}
};
const addModuleResult = _this.addModule(dependentModule, cacheGroup);
dependentModule = addModuleResult.module;
iterationDependencies(dependencies);
const afterBuild = () => {
if(currentProfile) {
const afterBuilding = Date.now();
currentProfile.building = afterBuilding - afterFactory;
}
if(recursive && addModuleResult.dependencies) {
_this.processModuleDependencies(dependentModule, callback);
} else {
return callback();
}
};
if(addModuleResult.issuer) {
if(currentProfile) {
dependentModule.profile = currentProfile;
}
dependentModule.issuer = module;
} else {
if(_this.profile) {
if(module.profile) {
const time = Date.now() - start;
if(!module.profile.dependencies || time > module.profile.dependencies) {
module.profile.dependencies = time;
}
}
}
}
if(addModuleResult.build) {
_this.buildModule(dependentModule, isOptional(), module, dependencies, err => {
if(_this === null) return semaphore.release();
if(err) {
semaphore.release();
return errorOrWarningAndCallback(err);
}
if(currentProfile) {
const afterBuilding = Date.now();
currentProfile.building = afterBuilding - afterFactory;
}
semaphore.release();
afterBuild();
});
} else {
semaphore.release();
_this.waitForBuildingFinished(dependentModule, afterBuild);
}
});
});
}, err => {
// In V8, the Error objects keep a reference to the functions on the stack. These warnings &
// errors are created inside closures that keep a reference to the Compilation, so errors are
// leaking the Compilation object.
if(err) {
err.stack = err.stack;
return callback(err);
}
return process.nextTick(callback);
});
}
_addModuleChain(context, dependency, onModule, callback) {
const start = this.profile && Date.now();
const currentProfile = this.profile && {};
const errorAndCallback = this.bail ? (err) => {
callback(err);
} : (err) => {
err.dependencies = [dependency];
this.errors.push(err);
callback();
};
if(typeof dependency !== "object" || dependency === null || !dependency.constructor) {
throw new Error("Parameter 'dependency' must be a Dependency");
}
const moduleFactory = this.dependencyFactories.get(dependency.constructor);
if(!moduleFactory) {
throw new Error(`No dependency factory available for this dependency type: ${dependency.constructor.name}`);
}
this.semaphore.acquire(() => {
moduleFactory.create({
contextInfo: {
issuer: "",
compiler: this.compiler.name
},
context: context,
dependencies: [dependency]
}, (err, module) => {
if(err) {
this.semaphore.release();
return errorAndCallback(new EntryModuleNotFoundError(err));
}
let afterFactory;
if(currentProfile) {
afterFactory = Date.now();
currentProfile.factory = afterFactory - start;
}
const addModuleResult = this.addModule(module);
module = addModuleResult.module;
onModule(module);
dependency.module = module;
module.addReason(null, dependency);
const afterBuild = () => {
if(currentProfile) {
const afterBuilding = Date.now();
currentProfile.building = afterBuilding - afterFactory;
}
if(addModuleResult.dependencies) {
this.processModuleDependencies(module, err => {
if(err) return callback(err);
callback(null, module);
});
} else {
return callback(null, module);
}
};
if(addModuleResult.issuer) {
if(currentProfile) {
module.profile = currentProfile;
}
}
if(addModuleResult.build) {
this.buildModule(module, false, null, null, err => {
if(err) {
this.semaphore.release();
return errorAndCallback(err);
}
if(currentProfile) {
const afterBuilding = Date.now();
currentProfile.building = afterBuilding - afterFactory;
}
this.semaphore.release();
afterBuild();
});
} else {
this.semaphore.release();
this.waitForBuildingFinished(module, afterBuild);
}
});
});
}
addEntry(context, entry, name, callback) {
const slot = {
name: name,
request: entry.request,
module: null
};
this._preparedEntrypoints.push(slot);
this._addModuleChain(context, entry, (module) => {
this.entries.push(module);
}, (err, module) => {
if(err) {
return callback(err);
}
if(module) {
slot.module = module;
} else {
const idx = this._preparedEntrypoints.indexOf(slot);
this._preparedEntrypoints.splice(idx, 1);
}
return callback(null, module);
});
}
prefetch(context, dependency, callback) {
this._addModuleChain(context, dependency, module => {
module.prefetched = true;
}, callback);
}
rebuildModule(module, thisCallback) {
let callbackList = this._rebuildingModules.get(module);
if(callbackList) {
callbackList.push(thisCallback);
return;
}
this._rebuildingModules.set(module, callbackList = [thisCallback]);
const callback = err => {
this._rebuildingModules.delete(module);
for(const cb of callbackList) cb(err);
};
this.hooks.rebuildModule.call(module);
const oldDependencies = module.dependencies.slice();
const oldVariables = module.variables.slice();
const oldBlocks = module.blocks.slice();
module.unbuild();
this.buildModule(module, false, module, null, (err) => {
if(err) {
this.hooks.finishRebuildingModule.call(module);
return callback(err);
}
this.processModuleDependencies(module, (err) => {
if(err) return callback(err);
this.removeReasonsOfDependencyBlock(module, {
dependencies: oldDependencies,
variables: oldVariables,
blocks: oldBlocks
});
this.hooks.finishRebuildingModule.call(module);
callback();
});
});
}
finish() {
const modules = this.modules;
this.hooks.finishModules.call(modules);
for(let index = 0; index < modules.length; index++) {
const module = modules[index];
this.reportDependencyErrorsAndWarnings(module, [module]);
}
}
unseal() {
this.hooks.unseal.call();
this.chunks.length = 0;
this.chunkGroups.length = 0;
this.namedChunks.clear();
this.namedChunkGroups.clear();
this.additionalChunkAssets.length = 0;
this.assets = {};
for(const module of this.modules) {
module.unseal();
}
}
seal(callback) {
this.hooks.seal.call();
while(this.hooks.optimizeDependenciesBasic.call(this.modules) ||
this.hooks.optimizeDependencies.call(this.modules) ||
this.hooks.optimizeDependenciesAdvanced.call(this.modules)) { /* empty */ }
this.hooks.afterOptimizeDependencies.call(this.modules);
this.nextFreeModuleIndex = 0;
this.nextFreeModuleIndex2 = 0;
for(const preparedEntrypoint of this._preparedEntrypoints) {
const module = preparedEntrypoint.module;
const name = preparedEntrypoint.name;
const chunk = this.addChunk(name);
const entrypoint = new Entrypoint(name);
entrypoint.setRuntimeChunk(chunk);
entrypoint.addOrigin(null, name, preparedEntrypoint.request);
this.namedChunkGroups.set(name, entrypoint);
this.entrypoints.set(name, entrypoint);
this.chunkGroups.push(entrypoint);
GraphHelpers.connectChunkGroupAndChunk(entrypoint, chunk);
GraphHelpers.connectChunkAndModule(chunk, module);
chunk.entryModule = module;
chunk.name = name;
this.assignIndex(module);
this.assignDepth(module);
}
this.processDependenciesBlocksForChunkGroups(this.chunkGroups);
this.sortModules(this.modules);
this.hooks.optimize.call();
while(this.hooks.optimizeModulesBasic.call(this.modules) ||
this.hooks.optimizeModules.call(this.modules) ||
this.hooks.optimizeModulesAdvanced.call(this.modules)) { /* empty */ }
this.hooks.afterOptimizeModules.call(this.modules);
while(this.hooks.optimizeChunksBasic.call(this.chunks, this.chunkGroups) ||
this.hooks.optimizeChunks.call(this.chunks, this.chunkGroups) ||
this.hooks.optimizeChunksAdvanced.call(this.chunks, this.chunkGroups)) { /* empty */ }
this.hooks.afterOptimizeChunks.call(this.chunks, this.chunkGroups);
this.hooks.optimizeTree.callAsync(this.chunks, this.modules, err => {
if(err) {
return callback(err);
}
this.hooks.afterOptimizeTree.call(this.chunks, this.modules);
while(this.hooks.optimizeChunkModulesBasic.call(this.chunks, this.modules) ||
this.hooks.optimizeChunkModules.call(this.chunks, this.modules) ||
this.hooks.optimizeChunkModulesAdvanced.call(this.chunks, this.modules)) { /* empty */ }
this.hooks.afterOptimizeChunkModules.call(this.chunks, this.modules);
const shouldRecord = this.hooks.shouldRecord.call() !== false;
this.hooks.reviveModules.call(this.modules, this.records);
this.hooks.optimizeModuleOrder.call(this.modules);
this.hooks.advancedOptimizeModuleOrder.call(this.modules);
this.hooks.beforeModuleIds.call(this.modules);
this.hooks.moduleIds.call(this.modules);
this.applyModuleIds();
this.hooks.optimizeModuleIds.call(this.modules);
this.hooks.afterOptimizeModuleIds.call(this.modules);
this.sortItemsWithModuleIds();
this.hooks.reviveChunks.call(this.chunks, this.records);
this.hooks.optimizeChunkOrder.call(this.chunks);
this.hooks.beforeChunkIds.call(this.chunks);
this.applyChunkIds();
this.hooks.optimizeChunkIds.call(this.chunks);
this.hooks.afterOptimizeChunkIds.call(this.chunks);
this.sortItemsWithChunkIds();
if(shouldRecord)
this.hooks.recordModules.call(this.modules, this.records);
if(shouldRecord)
this.hooks.recordChunks.call(this.chunks, this.records);
this.hooks.beforeHash.call();
this.createHash();
this.hooks.afterHash.call();
if(shouldRecord)
this.hooks.recordHash.call(this.records);
this.hooks.beforeModuleAssets.call();
this.createModuleAssets();
if(this.hooks.shouldGenerateChunkAssets.call() !== false) {
this.hooks.beforeChunkAssets.call();
this.createChunkAssets();
}
this.hooks.additionalChunkAssets.call(this.chunks);
this.summarizeDependencies();
if(shouldRecord)
this.hooks.record.call(this, this.records);
this.hooks.additionalAssets.callAsync(err => {
if(err) {
return callback(err);
}
this.hooks.optimizeChunkAssets.callAsync(this.chunks, err => {
if(err) {
return callback(err);
}
this.hooks.afterOptimizeChunkAssets.call(this.chunks);
this.hooks.optimizeAssets.callAsync(this.assets, err => {
if(err) {
return callback(err);
}
this.hooks.afterOptimizeAssets.call(this.assets);
if(this.hooks.needAdditionalSeal.call()) {
this.unseal();
return this.seal(callback);
}
return this.hooks.afterSeal.callAsync(callback);
});
});
});
});
}
sortModules(modules) {
modules.sort(byIndexOrIdentifier);
}
reportDependencyErrorsAndWarnings(module, blocks) {
for(let indexBlock = 0; indexBlock < blocks.length; indexBlock++) {
const block = blocks[indexBlock];
const dependencies = block.dependencies;
for(let indexDep = 0; indexDep < dependencies.length; indexDep++) {
const d = dependencies[indexDep];
const warnings = d.getWarnings();
if(warnings) {
for(let indexWar = 0; indexWar < warnings.length; indexWar++) {
const w = warnings[indexWar];
const warning = new ModuleDependencyWarning(module, w, d.loc);
this.warnings.push(warning);
}
}
const errors = d.getErrors();
if(errors) {
for(let indexErr = 0; indexErr < errors.length; indexErr++) {
const e = errors[indexErr];
const error = new ModuleDependencyError(module, e, d.loc);
this.errors.push(error);
}
}
}
this.reportDependencyErrorsAndWarnings(module, block.blocks);
}
}
addChunkInGroup(name, module, loc, request) {
if(name) {
const chunkGroup = this.namedChunkGroups.get(name);
if(chunkGroup !== undefined) {
if(module) {
chunkGroup.addOrigin(module, loc, request);
}
return chunkGroup;
}
}
const chunkGroup = new ChunkGroup(name);
if(module)
chunkGroup.addOrigin(module, loc, request);
const chunk = this.addChunk(name);
GraphHelpers.connectChunkGroupAndChunk(chunkGroup, chunk);
this.chunkGroups.push(chunkGroup);
if(name) {
this.namedChunkGroups.set(name, chunkGroup);
}
return chunkGroup;
}
addChunk(name) {
if(name) {
const chunk = this.namedChunks.get(name);
if(chunk !== undefined) {
return chunk;
}
}
const chunk = new Chunk(name);
this.chunks.push(chunk);
if(name) {
this.namedChunks.set(name, chunk);
}
return chunk;
}
assignIndex(module) {
const _this = this;
const assignIndexToModule = module => {
// enter module
if(typeof module.index !== "number") {
module.index = _this.nextFreeModuleIndex++;
// leave module
queue.push(() => module.index2 = _this.nextFreeModuleIndex2++);
// enter it as block
assignIndexToDependencyBlock(module);
}
};
const assignIndexToDependency = dependency => {
if(dependency.module) {
queue.push(() => assignIndexToModule(dependency.module));
}
};
const assignIndexToDependencyBlock = block => {
let allDependencies = [];
const iteratorDependency = d => allDependencies.push(d);
const iteratorBlock = b => queue.push(() => assignIndexToDependencyBlock(b));
if(block.variables) {
iterationBlockVariable(block.variables, iteratorDependency);
}
if(block.dependencies) {
iterationOfArrayCallback(block.dependencies, iteratorDependency);
}
if(block.blocks) {
const blocks = block.blocks;
let indexBlock = blocks.length;
while(indexBlock--) {
iteratorBlock(blocks[indexBlock]);
}
}
let indexAll = allDependencies.length;
while(indexAll--) {
iteratorAllDependencies(allDependencies[indexAll]);
}
};
const queue = [() => {
assignIndexToModule(module);
}];
const iteratorAllDependencies = d => {
queue.push(() => assignIndexToDependency(d));
};
while(queue.length) {
queue.pop()();
}
}
assignDepth(module) {
const queue = new Set([module]);
let depth;
module.depth = 0;
const enqueueJob = module => {
const d = module.depth;
if(typeof d === "number" && d <= depth) return;
queue.add(module);
module.depth = depth;
};
const assignDepthToDependency = (dependency, depth) => {
if(dependency.module) {
enqueueJob(dependency.module);
}
};
const assignDepthToDependencyBlock = block => {
if(block.variables) {
iterationBlockVariable(block.variables, assignDepthToDependency);
}
if(block.dependencies) {
iterationOfArrayCallback(block.dependencies, assignDepthToDependency);
}
if(block.blocks) {
iterationOfArrayCallback(block.blocks, assignDepthToDependencyBlock);
}
};
for(module of queue) {
queue.delete(module);
depth = module.depth;
depth++;
assignDepthToDependencyBlock(module);
}
}
// This method creates the Chunk graph from the Module graph
processDependenciesBlocksForChunkGroups(inputChunkGroups) {
// Process is splitting into two parts:
// Part one traverse the module graph and builds a very basic chunks graph
// in chunkDependencies.
// Part two traverse every possible way through the basic chunk graph and
// tracks the available modules. While traversing it connects chunks with
// eachother and Blocks with Chunks. It stops traversing when all modules
// for a chunk are already available. So it doesn't connect unneeded chunks.
const chunkDependencies = new Map(); // Map<Chunk, Array<{Module, Chunk}>>
const allCreatedChunkGroups = new Set();
// PART ONE
const blockChunkGroups = new Map();
// Start with the provided modules/chunks
const queue = inputChunkGroups.map(chunkGroup => ({
block: chunkGroup.chunks[0].entryModule,
module: chunkGroup.chunks[0].entryModule,
chunk: chunkGroup.chunks[0],
chunkGroup
}));
let module, block, chunk, chunkGroup;
// For each async Block in graph
const iteratorBlock = b => {
// 1. We create a chunk for this Block
// but only once (blockChunkGroups map)
let c = blockChunkGroups.get(b);
if(c === undefined) {
c = this.namedChunkGroups.get(b.chunkName);
if(c && c.isInitial()) {
this.errors.push(new AsyncDependencyToInitialChunkError(b.chunkName, module, b.loc));
c = chunkGroup;
} else {
c = this.addChunkInGroup(b.chunkName, module, b.loc, b.request);
blockChunkGroups.set(b, c);
allCreatedChunkGroups.add(c);
}
} else {
c.addOrigin(module, b.loc, b.request);
}
// 2. We store the Block+Chunk mapping as dependency for the chunk
let deps = chunkDependencies.get(chunkGroup);
if(!deps) chunkDependencies.set(chunkGroup, deps = []);
deps.push({
block: b,
chunkGroup: c
});
// 3. We enqueue the DependenciesBlock for traversal
queue.push({
block: b,
module: module,
chunk: c.chunks[0],
chunkGroup: c
});
};
// For each Dependency in the graph
const iteratorDependency = d => {
// We skip Dependencies without Reference
const ref = d.getReference();
if(!ref) {
return;
}
// We skip Dependencies without Module pointer
const refModule = ref.module;
if(!refModule) {
return;
}
// We skip weak Dependencies
if(ref.weak) {
return;
}
// We connect Module and Chunk when not already done
if(chunk.addModule(refModule)) {
refModule.addChunk(chunk);
// And enqueue the Module for traversal
queue.push({
block: refModule,
module: refModule,
chunk,
chunkGroup
});
}
};
// Iterative traversal of the Module graph
// Recursive would be simpler to write but could result in Stack Overflows
while(queue.length) {
const queueItem = queue.pop();
module = queueItem.module;
block = queueItem.block;
chunk = queueItem.chunk;
chunkGroup = queueItem.chunkGroup;
// Traverse all variables, Dependencies and Blocks
if(block.variables) {
iterationBlockVariable(block.variables, iteratorDependency);
}
if(block.dependencies) {
iterationOfArrayCallback(block.dependencies, iteratorDependency);
}
if(block.blocks) {
iterationOfArrayCallback(block.blocks, iteratorBlock);
}
}
// PART TWO
let availableModules;
let newAvailableModules;
const queue2 = new Queue(inputChunkGroups.map(chunkGroup => ({
chunkGroup,
availableModules: new Set()
})));
// Helper function to check if all modules of a chunk are available
const areModulesAvailable = (chunkGroup, availableModules) => {
for(const chunk of chunkGroup.chunks) {
for(const module of chunk.modulesIterable) {
if(!availableModules.has(module))
return false;
}
}
return true;
};
// For each edge in the basic chunk graph
const filterFn = dep => {
// Filter egdes that are not needed because all modules are already available
// This also filters circular dependencies in the chunks graph
const depChunkGroup = dep.chunkGroup;
if(areModulesAvailable(depChunkGroup, newAvailableModules))
return false; // break all modules are already available
return true;
};
const minAvailableModulesMap = new Map();
// Iterative traversing of the basic chunk graph
while(queue2.length) {
const queueItem = queue2.dequeue();
chunkGroup = queueItem.chunkGroup;
availableModules = queueItem.availableModules;
// 1. Get minimal available modules
// It doesn't make sense to traverse a chunk again with more available modules.
// This step calculates the minimal available modules and skips traversal when
// the list didn't shrink.
let minAvailableModules = minAvailableModulesMap.get(chunkGroup);
if(minAvailableModules === undefined) {
minAvailableModulesMap.set(chunkGroup, new Set(availableModules));
} else {
let deletedModules = false;
for(const m of minAvailableModules) {
if(!availableModules.has(m)) {
minAvailableModules.delete(m);
deletedModules = true;
}
}
if(!deletedModules)
continue;
availableModules = minAvailableModules;
}
// 2. Get the edges at this point of the graph
const deps = chunkDependencies.get(chunkGroup);
if(!deps) continue;
if(deps.length === 0) continue;
// 3. Create a new Set of available modules at this points
newAvailableModules = new Set(availableModules);
for(const chunk of chunkGroup.chunks)
for(const m of chunk.modulesIterable)
newAvailableModules.add(m);
// 4. Filter edges with available modules
const filteredDeps = deps.filter(filterFn);
// 5. Foreach remaining edge
const nextChunkGroups = new Set();
for(let i = 0; i < filteredDeps.length; i++) {
const dep = filteredDeps[i];
const depChunkGroup = dep.chunkGroup;
const depBlock = dep.block;
// 6. Connnect block with chunk
GraphHelpers.connectDependenciesBlockAndChunkGroup(depBlock, depChunkGroup);
// 7. Connect chunk with parent
GraphHelpers.connectChunkGroupParentAndChild(chunkGroup, depChunkGroup);
nextChunkGroups.add(depChunkGroup);
}
// 8. Enqueue further traversal
for(const nextChunkGroup of nextChunkGroups) {
queue2.enqueue({
chunkGroup: nextChunkGroup,
availableModules: newAvailableModules
});
}
}
// Remove all unconnected chunk groups
for(const chunkGroup of allCreatedChunkGroups) {
if(chunkGroup.getNumberOfParents() === 0) {
for(const chunk of chunkGroup.chunks) {
const idx = this.chunks.indexOf(chunk);
if(idx >= 0)
this.chunks.splice(idx, 1);
chunk.remove("unconnected");
}
chunkGroup.remove("unconnected");
}
}
}
removeReasonsOfDependencyBlock(module, block) {
const iteratorDependency = d => {
if(!d.module) {
return;
}
if(d.module.removeReason(module, d)) {
for(const chunk of d.module.chunksIterable) {
this.patchChunksAfterReasonRemoval(d.module, chunk);
}
}
};
if(block.blocks) {
iterationOfArrayCallback(block.blocks, block => this.removeReasonsOfDependencyBlock(module, block));
}
if(block.dependencies) {
iterationOfArrayCallback(block.dependencies, iteratorDependency);
}
if(block.variables) {
iterationBlockVariable(block.variables, iteratorDependency);
}
}
patchChunksAfterReasonRemoval(module, chunk) {
if(!module.hasReasons()) {
this.removeReasonsOfDependencyBlock(module, module);
}
if(!module.hasReasonForChunk(chunk)) {
if(module.removeChunk(chunk)) {
this.removeChunkFromDependencies(module, chunk);
}
}
}
removeChunkFromDependencies(block, chunk) {
const iteratorDependency = d => {
if(!d.module) {
return;
}
this.patchChunksAfterReasonRemoval(d.module, chunk);
};
const blocks = block.blocks;
for(let indexBlock = 0; indexBlock < blocks.length; indexBlock++) {
const chunks = blocks[indexBlock].chunks;
for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
const blockChunk = chunks[indexChunk];
chunk.removeChunk(blockChunk);
blockChunk.removeParent(chunk);
this.removeChunkFromDependencies(chunks, blockChunk);
}
}
if(block.dependencies) {
iterationOfArrayCallback(block.dependencies, iteratorDependency);
}
if(block.variables) {
iterationBlockVariable(block.variables, iteratorDependency);
}
}
applyModuleIds() {
const unusedIds = [];
let nextFreeModuleId = 0;
const usedIds = new Set();
if(this.usedModuleIds) {
for(const id of this.usedModuleIds) {
usedIds.add(id);
}
}
const modules1 = this.modules;
for(let indexModule1 = 0; indexModule1 < modules1.length; indexModule1++) {
const module1 = modules1[indexModule1];
if(module1.id !== null) {
usedIds.add(module1.id);
}
}
if(usedIds.size > 0) {
let usedIdMax = -1;
for(const usedIdKey of usedIds) {
if(typeof usedIdKey !== "number") {
continue;
}
usedIdMax = Math.max(usedIdMax, usedIdKey);
}
let lengthFreeModules = nextFreeModuleId = usedIdMax + 1;
while(lengthFreeModules--) {
if(!usedIds.has(lengthFreeModules)) {
unusedIds.push(lengthFreeModules);
}
}
}
const modules2 = this.modules;
for(let indexModule2 = 0; indexModule2 < modules2.length; indexModule2++) {
const module2 = modules2[indexModule2];
if(module2.id === null) {
if(unusedIds.length > 0)
module2.id = unusedIds.pop();
else
module2.id = nextFreeModuleId++;
}
}
}
applyChunkIds() {
const usedIds = new Set();
// Get used ids from usedChunkIds property (i. e. from records)
if(this.usedChunkIds) {
for(const id of this.usedChunkIds) {
if(typeof id !== "number") {
continue;
}
usedIds.add(id);
}
}
// Get used ids from existing chunks
const chunks = this.chunks;
for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
const chunk = chunks[indexChunk];
const usedIdValue = chunk.id;
if(typeof usedIdValue !== "number") {
continue;
}
usedIds.add(usedIdValue);
}
// Calculate maximum assigned chunk id
let nextFreeChunkId = -1;
for(const id of usedIds) {
nextFreeChunkId = Math.max(nextFreeChunkId, id);
}
nextFreeChunkId++;
// Determine free chunk ids from 0 to maximum
const unusedIds = [];
if(nextFreeChunkId > 0) {
let index = nextFreeChunkId;
while(index--) {
if(!usedIds.has(index)) {
unusedIds.push(index);
}
}
}
// Assign ids to chunk which has no id
for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
const chunk = chunks[indexChunk];
if(chunk.id === null) {
if(unusedIds.length > 0)
chunk.id = unusedIds.pop();
else
chunk.id = nextFreeChunkId++;
}
if(!chunk.ids) {
chunk.ids = [chunk.id];
}
}
}
sortItemsWithModuleIds() {
this.modules.sort(byIdOrIdentifier);
const modules = this.modules;
for(let indexModule = 0; indexModule < modules.length; indexModule++) {
modules[indexModule].sortItems(false);
}
const chunks = this.chunks;
for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
chunks[indexChunk].sortItems(false);
}
}
sortItemsWithChunkIds() {
for(const chunkGroup of this.chunkGroups) {
chunkGroup.sortItems();
}
this.chunks.sort(byId);
for(let indexModule = 0; indexModule < this.modules.length; indexModule++) {
this.modules[indexModule].sortItems(true);
}
const chunks = this.chunks;
for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
chunks[indexChunk].sortItems(true);
}
const byMessage = (a, b) => {
const ma = `${a.message}`;
const mb = `${b.message}`;
if(ma < mb) return -1;
if(mb < ma) return 1;
return 0;
};
this.errors.sort(byMessage);
this.warnings.sort(byMessage);
}
summarizeDependencies() {
this.fileDependencies = new SortableSet(this.compilationDependencies);
this.contextDependencies = new SortableSet();
this.missingDependencies = new SortableSet();
for(let indexChildren = 0; indexChildren < this.children.length; indexChildren++) {
const child = this.children[indexChildren];
addAllToSet(this.fileDependencies, child.fileDependencies);
addAllToSet(this.contextDependencies, child.contextDependencies);
addAllToSet(this.missingDependencies, child.missingDependencies);
}
for(let indexModule = 0; indexModule < this.modules.length; indexModule++) {
const module = this.modules[indexModule];
if(module.buildInfo.fileDependencies) {
addAllToSet(this.fileDependencies, module.buildInfo.fileDependencies);
}
if(module.buildInfo.contextDependencies) {
addAllToSet(this.contextDependencies, module.buildInfo.contextDependencies);
}
}
for(const error of this.errors) {
if(typeof error.missing === "object" && error.missing && error.missing[Symbol.iterator]) {
addAllToSet(this.missingDependencies, error.missing);
}
}
this.fileDependencies.sort();
this.contextDependencies.sort();
this.missingDependencies.sort();
}
createHash() {
const outputOptions = this.outputOptions;
const hashFunction = outputOptions.hashFunction;
const hashDigest = outputOptions.hashDigest;
const hashDigestLength = outputOptions.hashDigestLength;
const hash = createHash(hashFunction);
if(outputOptions.hashSalt)
hash.update(outputOptions.hashSalt);
this.mainTemplate.updateHash(hash);
this.chunkTemplate.updateHash(hash);
for(const key of Object.keys(this.moduleTemplates).sort()) this.moduleTemplates[key].updateHash(hash);
for(const child of this.children) hash.update(child.hash);
for(const warning of this.warnings) hash.update(`${warning.message}`);
for(const error of this.errors) hash.update(`${error.message}`);
const modules = this.modules;
for(let i = 0; i < modules.length; i++) {
const module = modules[i];
const moduleHash = createHash(hashFunction);
module.updateHash(moduleHash);
module.hash = moduleHash.digest(hashDigest);
module.renderedHash = module.hash.substr(0, hashDigestLength);
}
// clone needed as sort below is inplace mutation
const chunks = this.chunks.slice();
/**
* sort here will bring all "falsy" values to the beginning
* this is needed as the "hasRuntime()" chunks are dependent on the
* hashes of the non-runtime chunks.
*/
chunks.sort((a, b) => {
const aEntry = a.hasRuntime();
const bEntry = b.hasRuntime();
if(aEntry && !bEntry) return 1;
if(!aEntry && bEntry) return -1;
return 0;
});
for(let i = 0; i < chunks.length; i++) {
const chunk = chunks[i];
const chunkHash = createHash(hashFunction);
if(outputOptions.hashSalt)
chunkHash.update(outputOptions.hashSalt);
chunk.updateHash(chunkHash);
if(chunk.hasRuntime()) {
this.mainTemplate.updateHashForChunk(chunkHash, chunk);
} else {
this.chunkTemplate.updateHashForChunk(chunkHash, chunk);
}
this.hooks.chunkHash.call(chunk, chunkHash);
chunk.hash = chunkHash.digest(hashDigest);
hash.update(chunk.hash);
chunk.renderedHash = chunk.hash.substr(0, hashDigestLength);
}
this.fullHash = hash.digest(hashDigest);
this.hash = this.fullHash.substr(0, hashDigestLength);
}
modifyHash(update) {
const outputOptions = this.outputOptions;
const hashFunction = outputOptions.hashFunction;
const hashDigest = outputOptions.hashDigest;
const hashDigestLength = outputOptions.hashDigestLength;
const hash = createHash(hashFunction);
hash.update(this.fullHash);
hash.update(update);
this.fullHash = hash.digest(hashDigest);
this.hash = this.fullHash.substr(0, hashDigestLength);
}
createModuleAssets() {
for(let i = 0; i < this.modules.length; i++) {
const module = this.modules[i];
if(module.buildInfo.assets) {
for(const assetName of Object.keys(module.buildInfo.assets)) {
const fileName = this.getPath(assetName);
this.assets[fileName] = module.buildInfo.assets[assetName];
this.hooks.moduleAsset.call(module, fileName);
}
}
}
}
createChunkAssets() {
const outputOptions = this.outputOptions;
const cachedSourceMap = new Map();
for(let i = 0; i < this.chunks.length; i++) {
const chunk = this.chunks[i];
chunk.files = [];
let source;
let file;
let filenameTemplate;
try {
const template = chunk.hasRuntime() ? this.mainTemplate : this.chunkTemplate;
const manifest = template.getRenderManifest({
chunk,
hash: this.hash,
fullHash: this.fullHash,
outputOptions,
moduleTemplates: this.moduleTemplates,
dependencyTemplates: this.dependencyTemplates
}); // [{ render(), filenameTemplate, pathOptions, identifier, hash }]
for(const fileManifest of manifest) {
const cacheName = fileManifest.identifier;
const usedHash = fileManifest.hash;
filenameTemplate = fileManifest.filenameTemplate;
if(this.cache && this.cache[cacheName] && this.cache[cacheName].hash === usedHash) {
source = this.cache[cacheName].source;
} else {
source = fileManifest.render();
// Ensure that source is a cached source to avoid additional cost because of repeated access
if(!(source instanceof CachedSource)) {
const cacheEntry = cachedSourceMap.get(source);
if(cacheEntry) {
source = cacheEntry;
} else {
const cachedSource = new CachedSource(source);
cachedSourceMap.set(source, cachedSource);
source = cachedSource;
}
}
if(this.cache) {
this.cache[cacheName] = {
hash: usedHash,
source
};
}
}
file = this.getPath(filenameTemplate, fileManifest.pathOptions);
if(this.assets[file] && this.assets[file] !== source)
throw new Error(`Conflict: Multiple assets emit to the same filename ${file}`);
this.assets[file] = source;
chunk.files.push(file);
this.hooks.chunkAsset.call(chunk, file);
}
} catch(err) {
this.errors.push(new ChunkRenderError(chunk, file || filenameTemplate, err));
}
}
}
getPath(filename, data) {
data = data || {};
data.hash = data.hash || this.hash;
return this.mainTemplate.getAssetPath(filename, data);
}
createChildCompiler(name, outputOptions, plugins) {
const idx = (this.childrenCounters[name] || 0);
this.childrenCounters[name] = idx + 1;
return this.compiler.createChildCompiler(this, name, idx, outputOptions, plugins);
}
checkConstraints() {
const usedIds = new Set();
const modules = this.modules;
for(let indexModule = 0; indexModule < modules.length; indexModule++) {
const moduleId = modules[indexModule].id;
if(moduleId === null) continue;
if(usedIds.has(moduleId))
throw new Error(`checkConstraints: duplicate module id ${moduleId}`);
usedIds.add(moduleId);
}
const chunks = this.chunks;
for(let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
const chunk = chunks[indexChunk];
if(chunks.indexOf(chunk) !== indexChunk)
throw new Error(`checkConstraints: duplicate chunk in compilation ${chunk.debugId}`);
}
for(const chunkGroup of this.chunkGroups) {
chunkGroup.checkConstraints();
}
}
}
// TODO remove in webpack 5
Compilation.prototype.applyPlugins = util.deprecate(function(name, ...args) {
this.hooks[name.replace(/[- ]([a-z])/g, match => match[1].toUpperCase())].call(...args);
}, "Compilation.applyPlugins is deprecated. Use new API on `.hooks` instead");
// TODO remove in webpack 5
Object.defineProperty(Compilation.prototype, "moduleTemplate", {
configurable: false,
get: util.deprecate(function() {
return this.moduleTemplates.javascript;
}, "Compilation.moduleTemplate: Use Compilation.moduleTemplates.javascript instead"),
set: util.deprecate(function(value) {
this.moduleTemplates.javascript = value;
}, "Compilation.moduleTemplate: Use Compilation.moduleTemplates.javascript instead.")
});
module.exports = Compilation;