api, login, auth

1 files changed, 2327 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/Compilation.js b/node_modules/webpack/lib/Compilation.js
new file mode 100644
index 0000000..6329174
--- /dev/null
+++ b/node_modules/webpack/lib/Compilation.js
@@ -0,0 +1,2327 @@
+/*
+	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 { CachedSource } = require("webpack-sources");
+const {
+	Tapable,
+	SyncHook,
+	SyncBailHook,
+	SyncWaterfallHook,
+	AsyncSeriesHook
+} = require("tapable");
+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 ChunkRenderError = require("./ChunkRenderError");
+const Stats = require("./Stats");
+const Semaphore = require("./util/Semaphore");
+const createHash = require("./util/createHash");
+const SortableSet = require("./util/SortableSet");
+const GraphHelpers = require("./GraphHelpers");
+const ModuleDependency = require("./dependencies/ModuleDependency");
+const compareLocations = require("./compareLocations");
+const { Logger, LogType } = require("./logging/Logger");
+const ErrorHelpers = require("./ErrorHelpers");
+const buildChunkGraph = require("./buildChunkGraph");
+const WebpackError = require("./WebpackError");
+
+/** @typedef {import("./Module")} Module */
+/** @typedef {import("./Compiler")} Compiler */
+/** @typedef {import("webpack-sources").Source} Source */
+/** @typedef {import("./DependenciesBlockVariable")} DependenciesBlockVariable */
+/** @typedef {import("./dependencies/SingleEntryDependency")} SingleEntryDependency */
+/** @typedef {import("./dependencies/MultiEntryDependency")} MultiEntryDependency */
+/** @typedef {import("./dependencies/DllEntryDependency")} DllEntryDependency */
+/** @typedef {import("./dependencies/DependencyReference")} DependencyReference */
+/** @typedef {import("./DependenciesBlock")} DependenciesBlock */
+/** @typedef {import("./AsyncDependenciesBlock")} AsyncDependenciesBlock */
+/** @typedef {import("./Dependency")} Dependency */
+/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
+/** @typedef {import("./Dependency").DependencyTemplate} DependencyTemplate */
+/** @typedef {import("./util/createHash").Hash} Hash */
+
+// TODO use @callback
+/** @typedef {{[assetName: string]: Source}} CompilationAssets */
+/** @typedef {(err: Error|null, result?: Module) => void } ModuleCallback */
+/** @typedef {(err?: Error|null, result?: Module) => void } ModuleChainCallback */
+/** @typedef {(module: Module) => void} OnModuleCallback */
+/** @typedef {(err?: Error|null) => void} Callback */
+/** @typedef {(d: Dependency) => any} DepBlockVarDependenciesCallback */
+/** @typedef {new (...args: any[]) => Dependency} DepConstructor */
+/** @typedef {{apply: () => void}} Plugin */
+
+/**
+ * @typedef {Object} ModuleFactoryCreateDataContextInfo
+ * @property {string} issuer
+ * @property {string} compiler
+ */
+
+/**
+ * @typedef {Object} ModuleFactoryCreateData
+ * @property {ModuleFactoryCreateDataContextInfo} contextInfo
+ * @property {any=} resolveOptions
+ * @property {string} context
+ * @property {Dependency[]} dependencies
+ */
+
+/**
+ * @typedef {Object} ModuleFactory
+ * @property {(data: ModuleFactoryCreateData, callback: ModuleCallback) => any} create
+ */
+
+/**
+ * @typedef {Object} SortedDependency
+ * @property {ModuleFactory} factory
+ * @property {Dependency[]} dependencies
+ */
+
+/**
+ * @typedef {Object} DependenciesBlockLike
+ * @property {Dependency[]} dependencies
+ * @property {AsyncDependenciesBlock[]} blocks
+ * @property {DependenciesBlockVariable[]} variables
+ */
+
+/**
+ * @typedef {Object} LogEntry
+ * @property {string} type
+ * @property {any[]} args
+ * @property {number} time
+ * @property {string[]=} trace
+ */
+
+/**
+ * @typedef {Object} AssetInfo
+ * @property {boolean=} immutable true, if the asset can be long term cached forever (contains a hash)
+ * @property {number=} size size in bytes, only set after asset has been emitted
+ * @property {boolean=} development true, when asset is only used for development and doesn't count towards user-facing assets
+ * @property {boolean=} hotModuleReplacement true, when asset ships data for updating an existing application (HMR)
+ */
+
+/**
+ * @typedef {Object} Asset
+ * @property {string} name the filename of the asset
+ * @property {Source} source source of the asset
+ * @property {AssetInfo} info info about the asset
+ */
+
+/**
+ * @param {Chunk} a first chunk to sort by id
+ * @param {Chunk} b second chunk to sort by id
+ * @returns {-1|0|1} sort value
+ */
+const byId = (a, b) => {
+	if (typeof a.id !== typeof b.id) {
+		return typeof a.id < typeof b.id ? -1 : 1;
+	}
+	if (a.id < b.id) return -1;
+	if (a.id > b.id) return 1;
+	return 0;
+};
+
+/**
+ * @param {Module} a first module to sort by
+ * @param {Module} b second module to sort by
+ * @returns {-1|0|1} sort value
+ */
+const byIdOrIdentifier = (a, b) => {
+	if (typeof a.id !== typeof b.id) {
+		return typeof a.id < typeof b.id ? -1 : 1;
+	}
+	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;
+};
+
+/**
+ * @param {Module} a first module to sort by
+ * @param {Module} b second module to sort by
+ * @returns {-1|0|1} sort value
+ */
+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;
+};
+
+/**
+ * @param {Compilation} a first compilation to sort by
+ * @param {Compilation} b second compilation to sort by
+ * @returns {-1|0|1} sort value
+ */
+const byNameOrHash = (a, b) => {
+	if (a.name < b.name) return -1;
+	if (a.name > b.name) return 1;
+	if (a.fullHash < b.fullHash) return -1;
+	if (a.fullHash > b.fullHash) return 1;
+	return 0;
+};
+
+/**
+ * @param {DependenciesBlockVariable[]} variables DepBlock Variables to iterate over
+ * @param {DepBlockVarDependenciesCallback} fn callback to apply on iterated elements
+ * @returns {void}
+ */
+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]);
+		}
+	}
+};
+
+/**
+ * @template T
+ * @param {T[]} arr array of elements to iterate over
+ * @param {function(T): void} fn callback applied to each element
+ * @returns {void}
+ */
+const iterationOfArrayCallback = (arr, fn) => {
+	for (let index = 0; index < arr.length; index++) {
+		fn(arr[index]);
+	}
+};
+
+/**
+ * @template T
+ * @param {Set<T>} set set to add items to
+ * @param {Set<T>} otherSet set to add items from
+ * @returns {void}
+ */
+const addAllToSet = (set, otherSet) => {
+	for (const item of otherSet) {
+		set.add(item);
+	}
+};
+
+/**
+ * @param {Source} a a source
+ * @param {Source} b another source
+ * @returns {boolean} true, when both sources are equal
+ */
+const isSourceEqual = (a, b) => {
+	if (a === b) return true;
+	// TODO webpack 5: check .buffer() instead, it's called anyway during emit
+	/** @type {Buffer|string} */
+	let aSource = a.source();
+	/** @type {Buffer|string} */
+	let bSource = b.source();
+	if (aSource === bSource) return true;
+	if (typeof aSource === "string" && typeof bSource === "string") return false;
+	if (!Buffer.isBuffer(aSource)) aSource = Buffer.from(aSource, "utf-8");
+	if (!Buffer.isBuffer(bSource)) bSource = Buffer.from(bSource, "utf-8");
+	return aSource.equals(bSource);
+};
+
+class Compilation extends Tapable {
+	/**
+	 * Creates an instance of Compilation.
+	 * @param {Compiler} compiler the compiler which created the compilation
+	 */
+	constructor(compiler) {
+		super();
+		this.hooks = {
+			/** @type {SyncHook<Module>} */
+			buildModule: new SyncHook(["module"]),
+			/** @type {SyncHook<Module>} */
+			rebuildModule: new SyncHook(["module"]),
+			/** @type {SyncHook<Module, Error>} */
+			failedModule: new SyncHook(["module", "error"]),
+			/** @type {SyncHook<Module>} */
+			succeedModule: new SyncHook(["module"]),
+
+			/** @type {SyncHook<Dependency, string>} */
+			addEntry: new SyncHook(["entry", "name"]),
+			/** @type {SyncHook<Dependency, string, Error>} */
+			failedEntry: new SyncHook(["entry", "name", "error"]),
+			/** @type {SyncHook<Dependency, string, Module>} */
+			succeedEntry: new SyncHook(["entry", "name", "module"]),
+
+			/** @type {SyncWaterfallHook<DependencyReference, Dependency, Module>} */
+			dependencyReference: new SyncWaterfallHook([
+				"dependencyReference",
+				"dependency",
+				"module"
+			]),
+
+			/** @type {AsyncSeriesHook<Module[]>} */
+			finishModules: new AsyncSeriesHook(["modules"]),
+			/** @type {SyncHook<Module>} */
+			finishRebuildingModule: new SyncHook(["module"]),
+			/** @type {SyncHook} */
+			unseal: new SyncHook([]),
+			/** @type {SyncHook} */
+			seal: new SyncHook([]),
+
+			/** @type {SyncHook} */
+			beforeChunks: new SyncHook([]),
+			/** @type {SyncHook<Chunk[]>} */
+			afterChunks: new SyncHook(["chunks"]),
+
+			/** @type {SyncBailHook<Module[]>} */
+			optimizeDependenciesBasic: new SyncBailHook(["modules"]),
+			/** @type {SyncBailHook<Module[]>} */
+			optimizeDependencies: new SyncBailHook(["modules"]),
+			/** @type {SyncBailHook<Module[]>} */
+			optimizeDependenciesAdvanced: new SyncBailHook(["modules"]),
+			/** @type {SyncBailHook<Module[]>} */
+			afterOptimizeDependencies: new SyncHook(["modules"]),
+
+			/** @type {SyncHook} */
+			optimize: new SyncHook([]),
+			/** @type {SyncBailHook<Module[]>} */
+			optimizeModulesBasic: new SyncBailHook(["modules"]),
+			/** @type {SyncBailHook<Module[]>} */
+			optimizeModules: new SyncBailHook(["modules"]),
+			/** @type {SyncBailHook<Module[]>} */
+			optimizeModulesAdvanced: new SyncBailHook(["modules"]),
+			/** @type {SyncHook<Module[]>} */
+			afterOptimizeModules: new SyncHook(["modules"]),
+
+			/** @type {SyncBailHook<Chunk[], ChunkGroup[]>} */
+			optimizeChunksBasic: new SyncBailHook(["chunks", "chunkGroups"]),
+			/** @type {SyncBailHook<Chunk[], ChunkGroup[]>} */
+			optimizeChunks: new SyncBailHook(["chunks", "chunkGroups"]),
+			/** @type {SyncBailHook<Chunk[], ChunkGroup[]>} */
+			optimizeChunksAdvanced: new SyncBailHook(["chunks", "chunkGroups"]),
+			/** @type {SyncHook<Chunk[], ChunkGroup[]>} */
+			afterOptimizeChunks: new SyncHook(["chunks", "chunkGroups"]),
+
+			/** @type {AsyncSeriesHook<Chunk[], Module[]>} */
+			optimizeTree: new AsyncSeriesHook(["chunks", "modules"]),
+			/** @type {SyncHook<Chunk[], Module[]>} */
+			afterOptimizeTree: new SyncHook(["chunks", "modules"]),
+
+			/** @type {SyncBailHook<Chunk[], Module[]>} */
+			optimizeChunkModulesBasic: new SyncBailHook(["chunks", "modules"]),
+			/** @type {SyncBailHook<Chunk[], Module[]>} */
+			optimizeChunkModules: new SyncBailHook(["chunks", "modules"]),
+			/** @type {SyncBailHook<Chunk[], Module[]>} */
+			optimizeChunkModulesAdvanced: new SyncBailHook(["chunks", "modules"]),
+			/** @type {SyncHook<Chunk[], Module[]>} */
+			afterOptimizeChunkModules: new SyncHook(["chunks", "modules"]),
+			/** @type {SyncBailHook} */
+			shouldRecord: new SyncBailHook([]),
+
+			/** @type {SyncHook<Module[], any>} */
+			reviveModules: new SyncHook(["modules", "records"]),
+			/** @type {SyncHook<Module[]>} */
+			optimizeModuleOrder: new SyncHook(["modules"]),
+			/** @type {SyncHook<Module[]>} */
+			advancedOptimizeModuleOrder: new SyncHook(["modules"]),
+			/** @type {SyncHook<Module[]>} */
+			beforeModuleIds: new SyncHook(["modules"]),
+			/** @type {SyncHook<Module[]>} */
+			moduleIds: new SyncHook(["modules"]),
+			/** @type {SyncHook<Module[]>} */
+			optimizeModuleIds: new SyncHook(["modules"]),
+			/** @type {SyncHook<Module[]>} */
+			afterOptimizeModuleIds: new SyncHook(["modules"]),
+
+			/** @type {SyncHook<Chunk[], any>} */
+			reviveChunks: new SyncHook(["chunks", "records"]),
+			/** @type {SyncHook<Chunk[]>} */
+			optimizeChunkOrder: new SyncHook(["chunks"]),
+			/** @type {SyncHook<Chunk[]>} */
+			beforeChunkIds: new SyncHook(["chunks"]),
+			/** @type {SyncHook<Chunk[]>} */
+			optimizeChunkIds: new SyncHook(["chunks"]),
+			/** @type {SyncHook<Chunk[]>} */
+			afterOptimizeChunkIds: new SyncHook(["chunks"]),
+
+			/** @type {SyncHook<Module[], any>} */
+			recordModules: new SyncHook(["modules", "records"]),
+			/** @type {SyncHook<Chunk[], any>} */
+			recordChunks: new SyncHook(["chunks", "records"]),
+
+			/** @type {SyncHook} */
+			beforeHash: new SyncHook([]),
+			/** @type {SyncHook<Chunk>} */
+			contentHash: new SyncHook(["chunk"]),
+			/** @type {SyncHook} */
+			afterHash: new SyncHook([]),
+			/** @type {SyncHook<any>} */
+			recordHash: new SyncHook(["records"]),
+			/** @type {SyncHook<Compilation, any>} */
+			record: new SyncHook(["compilation", "records"]),
+
+			/** @type {SyncHook} */
+			beforeModuleAssets: new SyncHook([]),
+			/** @type {SyncBailHook} */
+			shouldGenerateChunkAssets: new SyncBailHook([]),
+			/** @type {SyncHook} */
+			beforeChunkAssets: new SyncHook([]),
+			/** @type {SyncHook<Chunk[]>} */
+			additionalChunkAssets: new SyncHook(["chunks"]),
+
+			/** @type {AsyncSeriesHook} */
+			additionalAssets: new AsyncSeriesHook([]),
+			/** @type {AsyncSeriesHook<Chunk[]>} */
+			optimizeChunkAssets: new AsyncSeriesHook(["chunks"]),
+			/** @type {SyncHook<Chunk[]>} */
+			afterOptimizeChunkAssets: new SyncHook(["chunks"]),
+			/** @type {AsyncSeriesHook<CompilationAssets>} */
+			optimizeAssets: new AsyncSeriesHook(["assets"]),
+			/** @type {SyncHook<CompilationAssets>} */
+			afterOptimizeAssets: new SyncHook(["assets"]),
+
+			/** @type {SyncBailHook} */
+			needAdditionalSeal: new SyncBailHook([]),
+			/** @type {AsyncSeriesHook} */
+			afterSeal: new AsyncSeriesHook([]),
+
+			/** @type {SyncHook<Chunk, Hash>} */
+			chunkHash: new SyncHook(["chunk", "chunkHash"]),
+			/** @type {SyncHook<Module, string>} */
+			moduleAsset: new SyncHook(["module", "filename"]),
+			/** @type {SyncHook<Chunk, string>} */
+			chunkAsset: new SyncHook(["chunk", "filename"]),
+
+			/** @type {SyncWaterfallHook<string, TODO>} */
+			assetPath: new SyncWaterfallHook(["filename", "data"]), // TODO MainTemplate
+
+			/** @type {SyncBailHook} */
+			needAdditionalPass: new SyncBailHook([]),
+
+			/** @type {SyncHook<Compiler, string, number>} */
+			childCompiler: new SyncHook([
+				"childCompiler",
+				"compilerName",
+				"compilerIndex"
+			]),
+
+			/** @type {SyncBailHook<string, LogEntry>} */
+			log: new SyncBailHook(["origin", "logEntry"]),
+
+			// TODO the following hooks are weirdly located here
+			// TODO move them for webpack 5
+			/** @type {SyncHook<object, Module>} */
+			normalModuleLoader: new SyncHook(["loaderContext", "module"]),
+
+			/** @type {SyncBailHook<Chunk[]>} */
+			optimizeExtractedChunksBasic: new SyncBailHook(["chunks"]),
+			/** @type {SyncBailHook<Chunk[]>} */
+			optimizeExtractedChunks: new SyncBailHook(["chunks"]),
+			/** @type {SyncBailHook<Chunk[]>} */
+			optimizeExtractedChunksAdvanced: new SyncBailHook(["chunks"]),
+			/** @type {SyncHook<Chunk[]>} */
+			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;
+			}
+		});
+		/** @type {string=} */
+		this.name = undefined;
+		/** @type {Compiler} */
+		this.compiler = compiler;
+		this.resolverFactory = compiler.resolverFactory;
+		this.inputFileSystem = compiler.inputFileSystem;
+		this.requestShortener = compiler.requestShortener;
+
+		const options = compiler.options;
+		this.options = options;
+		this.outputOptions = options && options.output;
+		/** @type {boolean=} */
+		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, "javascript"),
+			webassembly: new ModuleTemplate(this.runtimeTemplate, "webassembly")
+		};
+
+		this.semaphore = new Semaphore(options.parallelism || 100);
+
+		this.entries = [];
+		/** @private @type {{name: string, request: string, module: Module}[]} */
+		this._preparedEntrypoints = [];
+		/** @type {Map<string, Entrypoint>} */
+		this.entrypoints = new Map();
+		/** @type {Chunk[]} */
+		this.chunks = [];
+		/** @type {ChunkGroup[]} */
+		this.chunkGroups = [];
+		/** @type {Map<string, ChunkGroup>} */
+		this.namedChunkGroups = new Map();
+		/** @type {Map<string, Chunk>} */
+		this.namedChunks = new Map();
+		/** @type {Module[]} */
+		this.modules = [];
+		/** @private @type {Map<string, Module>} */
+		this._modules = new Map();
+		this.cache = null;
+		this.records = null;
+		/** @type {string[]} */
+		this.additionalChunkAssets = [];
+		/** @type {CompilationAssets} */
+		this.assets = {};
+		/** @type {Map<string, AssetInfo>} */
+		this.assetsInfo = new Map();
+		/** @type {WebpackError[]} */
+		this.errors = [];
+		/** @type {WebpackError[]} */
+		this.warnings = [];
+		/** @type {Compilation[]} */
+		this.children = [];
+		/** @type {Map<string, LogEntry[]>} */
+		this.logging = new Map();
+		/** @type {Map<DepConstructor, ModuleFactory>} */
+		this.dependencyFactories = new Map();
+		/** @type {Map<DepConstructor, DependencyTemplate>} */
+		this.dependencyTemplates = new Map();
+		// TODO refactor this in webpack 5 to a custom DependencyTemplates class with a hash property
+		// @ts-ignore
+		this.dependencyTemplates.set("hash", "");
+		this.childrenCounters = {};
+		/** @type {Set<number|string>} */
+		this.usedChunkIds = null;
+		/** @type {Set<number>} */
+		this.usedModuleIds = null;
+		/** @type {Map<string, number>=} */
+		this.fileTimestamps = undefined;
+		/** @type {Map<string, number>=} */
+		this.contextTimestamps = undefined;
+		/** @type {Set<string>=} */
+		this.compilationDependencies = undefined;
+		/** @private @type {Map<Module, Callback[]>} */
+		this._buildingModules = new Map();
+		/** @private @type {Map<Module, Callback[]>} */
+		this._rebuildingModules = new Map();
+		/** @type {Set<string>} */
+		this.emittedAssets = new Set();
+	}
+
+	getStats() {
+		return new Stats(this);
+	}
+
+	/**
+	 * @param {string | (function(): string)} name name of the logger, or function called once to get the logger name
+	 * @returns {Logger} a logger with that name
+	 */
+	getLogger(name) {
+		if (!name) {
+			throw new TypeError("Compilation.getLogger(name) called without a name");
+		}
+		/** @type {LogEntry[] | undefined} */
+		let logEntries;
+		return new Logger((type, args) => {
+			if (typeof name === "function") {
+				name = name();
+				if (!name) {
+					throw new TypeError(
+						"Compilation.getLogger(name) called with a function not returning a name"
+					);
+				}
+			}
+			let trace;
+			switch (type) {
+				case LogType.warn:
+				case LogType.error:
+				case LogType.trace:
+					trace = ErrorHelpers.cutOffLoaderExecution(new Error("Trace").stack)
+						.split("\n")
+						.slice(3);
+					break;
+			}
+			/** @type {LogEntry} */
+			const logEntry = {
+				time: Date.now(),
+				type,
+				args,
+				trace
+			};
+			if (this.hooks.log.call(name, logEntry) === undefined) {
+				if (logEntry.type === LogType.profileEnd) {
+					// eslint-disable-next-line node/no-unsupported-features/node-builtins
+					if (typeof console.profileEnd === "function") {
+						// eslint-disable-next-line node/no-unsupported-features/node-builtins
+						console.profileEnd(`[${name}] ${logEntry.args[0]}`);
+					}
+				}
+				if (logEntries === undefined) {
+					logEntries = this.logging.get(name);
+					if (logEntries === undefined) {
+						logEntries = [];
+						this.logging.set(name, logEntries);
+					}
+				}
+				logEntries.push(logEntry);
+				if (logEntry.type === LogType.profile) {
+					// eslint-disable-next-line node/no-unsupported-features/node-builtins
+					if (typeof console.profile === "function") {
+						// eslint-disable-next-line node/no-unsupported-features/node-builtins
+						console.profile(`[${name}] ${logEntry.args[0]}`);
+					}
+				}
+			}
+		});
+	}
+
+	/**
+	 * @typedef {Object} AddModuleResult
+	 * @property {Module} module the added or existing module
+	 * @property {boolean} issuer was this the first request for this module
+	 * @property {boolean} build should the module be build
+	 * @property {boolean} dependencies should dependencies be walked
+	 */
+
+	/**
+	 * @param {Module} module module to be added that was created
+	 * @param {any=} cacheGroup cacheGroup it is apart of
+	 * @returns {AddModuleResult} returns meta about whether or not the module had built
+	 * had an issuer, or any dependnecies
+	 */
+	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];
+
+			if (typeof cacheModule.updateCacheModule === "function") {
+				cacheModule.updateCacheModule(module);
+			}
+
+			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
+		};
+	}
+
+	/**
+	 * Fetches a module from a compilation by its identifier
+	 * @param {Module} module the module provided
+	 * @returns {Module} the module requested
+	 */
+	getModule(module) {
+		const identifier = module.identifier();
+		return this._modules.get(identifier);
+	}
+
+	/**
+	 * Attempts to search for a module by its identifier
+	 * @param {string} identifier identifier (usually path) for module
+	 * @returns {Module|undefined} attempt to search for module and return it, else undefined
+	 */
+	findModule(identifier) {
+		return this._modules.get(identifier);
+	}
+
+	/**
+	 * @param {Module} module module with its callback list
+	 * @param {Callback} callback the callback function
+	 * @returns {void}
+	 */
+	waitForBuildingFinished(module, callback) {
+		let callbackList = this._buildingModules.get(module);
+		if (callbackList) {
+			callbackList.push(() => callback());
+		} else {
+			process.nextTick(callback);
+		}
+	}
+
+	/**
+	 * Builds the module object
+	 *
+	 * @param {Module} module module to be built
+	 * @param {boolean} optional optional flag
+	 * @param {Module=} origin origin module this module build was requested from
+	 * @param {Dependency[]=} dependencies optional dependencies from the module to be built
+	 * @param {TODO} thisCallback the callback
+	 * @returns {TODO} returns the callback function with results
+	 */
+	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);
+				}
+				const originalMap = module.dependencies.reduce((map, v, i) => {
+					map.set(v, i);
+					return map;
+				}, new Map());
+				module.dependencies.sort((a, b) => {
+					const cmp = compareLocations(a.loc, b.loc);
+					if (cmp) return cmp;
+					return originalMap.get(a) - originalMap.get(b);
+				});
+				if (error) {
+					this.hooks.failedModule.call(module, error);
+					return callback(error);
+				}
+				this.hooks.succeedModule.call(module);
+				return callback();
+			}
+		);
+	}
+
+	/**
+	 * @param {Module} module to be processed for deps
+	 * @param {ModuleCallback} callback callback to be triggered
+	 * @returns {void}
+	 */
+	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
+		);
+	}
+
+	/**
+	 * @param {Module} module module to add deps to
+	 * @param {SortedDependency[]} dependencies set of sorted dependencies to iterate through
+	 * @param {(boolean|null)=} bail whether to bail or not
+	 * @param {TODO} cacheGroup optional cacheGroup
+	 * @param {boolean} recursive whether it is recursive traversal
+	 * @param {function} callback callback for when dependencies are finished being added
+	 * @returns {void}
+	 */
+	addModuleDependencies(
+		module,
+		dependencies,
+		bail,
+		cacheGroup,
+		recursive,
+		callback
+	) {
+		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;
+					err.dependencies = dependencies;
+					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(() => {
+					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) => {
+							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)
+								);
+							}
+							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 (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 (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) {
+					// eslint-disable-next-line no-self-assign
+					err.stack = err.stack;
+					return callback(err);
+				}
+
+				return process.nextTick(callback);
+			}
+		);
+	}
+
+	/**
+	 *
+	 * @param {string} context context string path
+	 * @param {Dependency} dependency dependency used to create Module chain
+	 * @param {OnModuleCallback} onModule function invoked on modules creation
+	 * @param {ModuleChainCallback} callback callback for when module chain is complete
+	 * @returns {void} will throw if dependency instance is not a valid Dependency
+	 */
+	_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 Dep = /** @type {DepConstructor} */ (dependency.constructor);
+		const moduleFactory = this.dependencyFactories.get(Dep);
+		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 (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);
+					}
+				}
+			);
+		});
+	}
+
+	/**
+	 *
+	 * @param {string} context context path for entry
+	 * @param {Dependency} entry entry dependency being created
+	 * @param {string} name name of entry
+	 * @param {ModuleCallback} callback callback function
+	 * @returns {void} returns
+	 */
+	addEntry(context, entry, name, callback) {
+		this.hooks.addEntry.call(entry, name);
+
+		const slot = {
+			name: name,
+			// TODO webpack 5 remove `request`
+			request: null,
+			module: null
+		};
+
+		if (entry instanceof ModuleDependency) {
+			slot.request = entry.request;
+		}
+
+		// TODO webpack 5: merge modules instead when multiple entry modules are supported
+		const idx = this._preparedEntrypoints.findIndex(slot => slot.name === name);
+		if (idx >= 0) {
+			// Overwrite existing entrypoint
+			this._preparedEntrypoints[idx] = slot;
+		} else {
+			this._preparedEntrypoints.push(slot);
+		}
+		this._addModuleChain(
+			context,
+			entry,
+			module => {
+				this.entries.push(module);
+			},
+			(err, module) => {
+				if (err) {
+					this.hooks.failedEntry.call(entry, name, err);
+					return callback(err);
+				}
+
+				if (module) {
+					slot.module = module;
+				} else {
+					const idx = this._preparedEntrypoints.indexOf(slot);
+					if (idx >= 0) {
+						this._preparedEntrypoints.splice(idx, 1);
+					}
+				}
+				this.hooks.succeedEntry.call(entry, name, module);
+				return callback(null, module);
+			}
+		);
+	}
+
+	/**
+	 * @param {string} context context path string
+	 * @param {Dependency} dependency dep used to create module
+	 * @param {ModuleCallback} callback module callback sending module up a level
+	 * @returns {void}
+	 */
+	prefetch(context, dependency, callback) {
+		this._addModuleChain(
+			context,
+			dependency,
+			module => {
+				module.prefetched = true;
+			},
+			callback
+		);
+	}
+
+	/**
+	 * @param {Module} module module to be rebuilt
+	 * @param {Callback} thisCallback callback when module finishes rebuilding
+	 * @returns {void}
+	 */
+	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(callback) {
+		const modules = this.modules;
+		this.hooks.finishModules.callAsync(modules, err => {
+			if (err) return callback(err);
+
+			for (let index = 0; index < modules.length; index++) {
+				const module = modules[index];
+				this.reportDependencyErrorsAndWarnings(module, [module]);
+			}
+
+			callback();
+		});
+	}
+
+	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 = {};
+		this.assetsInfo.clear();
+		for (const module of this.modules) {
+			module.unseal();
+		}
+	}
+
+	/**
+	 * @param {Callback} callback signals when the seal method is finishes
+	 * @returns {void}
+	 */
+	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.hooks.beforeChunks.call();
+		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.assignDepth(module);
+		}
+		buildChunkGraph(
+			this,
+			/** @type {Entrypoint[]} */ (this.chunkGroups.slice())
+		);
+		this.sortModules(this.modules);
+		this.hooks.afterChunks.call(this.chunks);
+
+		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);
+				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);
+					});
+				});
+			});
+		});
+	}
+
+	/**
+	 * @param {Module[]} modules the modules array on compilation to perform the sort for
+	 * @returns {void}
+	 */
+	sortModules(modules) {
+		// TODO webpack 5: this should only be enabled when `moduleIds: "natural"`
+		// TODO move it into a plugin (NaturalModuleIdsPlugin) and use this in WebpackOptionsApply
+		// TODO remove this method
+		modules.sort(byIndexOrIdentifier);
+	}
+
+	/**
+	 * @param {Module} module moulde to report from
+	 * @param {DependenciesBlock[]} blocks blocks to report from
+	 * @returns {void}
+	 */
+	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);
+		}
+	}
+
+	/**
+	 * @param {TODO} groupOptions options for the chunk group
+	 * @param {Module} module the module the references the chunk group
+	 * @param {DependencyLocation} loc the location from with the chunk group is referenced (inside of module)
+	 * @param {string} request the request from which the the chunk group is referenced
+	 * @returns {ChunkGroup} the new or existing chunk group
+	 */
+	addChunkInGroup(groupOptions, module, loc, request) {
+		if (typeof groupOptions === "string") {
+			groupOptions = { name: groupOptions };
+		}
+		const name = groupOptions.name;
+		if (name) {
+			const chunkGroup = this.namedChunkGroups.get(name);
+			if (chunkGroup !== undefined) {
+				chunkGroup.addOptions(groupOptions);
+				if (module) {
+					chunkGroup.addOrigin(module, loc, request);
+				}
+				return chunkGroup;
+			}
+		}
+		const chunkGroup = new ChunkGroup(groupOptions);
+		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;
+	}
+
+	/**
+	 * This method first looks to see if a name is provided for a new chunk,
+	 * and first looks to see if any named chunks already exist and reuse that chunk instead.
+	 *
+	 * @param {string=} name optional chunk name to be provided
+	 * @returns {Chunk} create a chunk (invoked during seal event)
+	 */
+	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;
+	}
+
+	/**
+	 * @param {Module} module module to assign depth
+	 * @returns {void}
+	 */
+	assignDepth(module) {
+		const queue = new Set([module]);
+		let depth;
+
+		module.depth = 0;
+
+		/**
+		 * @param {Module} module module for processeing
+		 * @returns {void}
+		 */
+		const enqueueJob = module => {
+			const d = module.depth;
+			if (typeof d === "number" && d <= depth) return;
+			queue.add(module);
+			module.depth = depth;
+		};
+
+		/**
+		 * @param {Dependency} dependency dependency to assign depth to
+		 * @returns {void}
+		 */
+		const assignDepthToDependency = dependency => {
+			if (dependency.module) {
+				enqueueJob(dependency.module);
+			}
+		};
+
+		/**
+		 * @param {DependenciesBlock} block block to assign depth to
+		 * @returns {void}
+		 */
+		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);
+		}
+	}
+
+	/**
+	 * @param {Module} module the module containing the dependency
+	 * @param {Dependency} dependency the dependency
+	 * @returns {DependencyReference} a reference for the dependency
+	 */
+	getDependencyReference(module, dependency) {
+		// TODO remove dep.getReference existence check in webpack 5
+		if (typeof dependency.getReference !== "function") return null;
+		const ref = dependency.getReference();
+		if (!ref) return null;
+		return this.hooks.dependencyReference.call(ref, dependency, module);
+	}
+
+	/**
+	 *
+	 * @param {Module} module module relationship for removal
+	 * @param {DependenciesBlockLike} block //TODO: good description
+	 * @returns {void}
+	 */
+	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);
+		}
+	}
+
+	/**
+	 * @param {Module} module module to patch tie
+	 * @param {Chunk} chunk chunk to patch tie
+	 * @returns {void}
+	 */
+	patchChunksAfterReasonRemoval(module, chunk) {
+		if (!module.hasReasons()) {
+			this.removeReasonsOfDependencyBlock(module, module);
+		}
+		if (!module.hasReasonForChunk(chunk)) {
+			if (module.removeChunk(chunk)) {
+				this.removeChunkFromDependencies(module, chunk);
+			}
+		}
+	}
+
+	/**
+	 *
+	 * @param {DependenciesBlock} block block tie for Chunk
+	 * @param {Chunk} chunk chunk to remove from dep
+	 * @returns {void}
+	 */
+	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 asyncBlock = blocks[indexBlock];
+			// Grab all chunks from the first Block's AsyncDepBlock
+			const chunks = asyncBlock.chunkGroup.chunks;
+			// For each chunk in chunkGroup
+			for (let indexChunk = 0; indexChunk < chunks.length; indexChunk++) {
+				const iteratedChunk = chunks[indexChunk];
+				asyncBlock.chunkGroup.removeChunk(iteratedChunk);
+				asyncBlock.chunkGroup.removeParent(iteratedChunk);
+				// Recurse
+				this.removeChunkFromDependencies(block, iteratedChunk);
+			}
+		}
+
+		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() {
+		/** @type {Set<number>} */
+		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
+		/** @type {number[]} */
+		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();
+		}
+
+		chunks.sort((a, b) => a.compareTo(b));
+	}
+
+	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();
+		}
+
+		/**
+		 * Used to sort errors and warnings in compilation. this.warnings, and
+		 * this.errors contribute to the compilation hash and therefore should be
+		 * updated whenever other references (having a chunk id) are sorted. This preserves the hash
+		 * integrity
+		 *
+		 * @param {WebpackError} a first WebpackError instance (including subclasses)
+		 * @param {WebpackError} b second WebpackError instance (including subclasses)
+		 * @returns {-1|0|1} sort order index
+		 */
+		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);
+		this.children.sort(byNameOrHash);
+	}
+
+	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 = /** @type {string} */ (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 byId(a, b);
+		});
+		for (let i = 0; i < chunks.length; i++) {
+			const chunk = chunks[i];
+			const chunkHash = createHash(hashFunction);
+			try {
+				if (outputOptions.hashSalt) {
+					chunkHash.update(outputOptions.hashSalt);
+				}
+				chunk.updateHash(chunkHash);
+				const template = chunk.hasRuntime()
+					? this.mainTemplate
+					: this.chunkTemplate;
+				template.updateHashForChunk(
+					chunkHash,
+					chunk,
+					this.moduleTemplates.javascript,
+					this.dependencyTemplates
+				);
+				this.hooks.chunkHash.call(chunk, chunkHash);
+				chunk.hash = /** @type {string} */ (chunkHash.digest(hashDigest));
+				hash.update(chunk.hash);
+				chunk.renderedHash = chunk.hash.substr(0, hashDigestLength);
+				this.hooks.contentHash.call(chunk);
+			} catch (err) {
+				this.errors.push(new ChunkRenderError(chunk, "", err));
+			}
+		}
+		this.fullHash = /** @type {string} */ (hash.digest(hashDigest));
+		this.hash = this.fullHash.substr(0, hashDigestLength);
+	}
+
+	/**
+	 * @param {string} update extra information
+	 * @returns {void}
+	 */
+	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 = /** @type {string} */ (hash.digest(hashDigest));
+		this.hash = this.fullHash.substr(0, hashDigestLength);
+	}
+
+	/**
+	 * @param {string} file file name
+	 * @param {Source} source asset source
+	 * @param {AssetInfo} assetInfo extra asset information
+	 * @returns {void}
+	 */
+	emitAsset(file, source, assetInfo = {}) {
+		if (this.assets[file]) {
+			if (!isSourceEqual(this.assets[file], source)) {
+				// TODO webpack 5: make this an error instead
+				this.warnings.push(
+					new WebpackError(
+						`Conflict: Multiple assets emit different content to the same filename ${file}`
+					)
+				);
+				this.assets[file] = source;
+				this.assetsInfo.set(file, assetInfo);
+				return;
+			}
+			const oldInfo = this.assetsInfo.get(file);
+			this.assetsInfo.set(file, Object.assign({}, oldInfo, assetInfo));
+			return;
+		}
+		this.assets[file] = source;
+		this.assetsInfo.set(file, assetInfo);
+	}
+
+	/**
+	 * @param {string} file file name
+	 * @param {Source | function(Source): Source} newSourceOrFunction new asset source or function converting old to new
+	 * @param {AssetInfo | function(AssetInfo | undefined): AssetInfo} assetInfoUpdateOrFunction new asset info or function converting old to new
+	 */
+	updateAsset(
+		file,
+		newSourceOrFunction,
+		assetInfoUpdateOrFunction = undefined
+	) {
+		if (!this.assets[file]) {
+			throw new Error(
+				`Called Compilation.updateAsset for not existing filename ${file}`
+			);
+		}
+		if (typeof newSourceOrFunction === "function") {
+			this.assets[file] = newSourceOrFunction(this.assets[file]);
+		} else {
+			this.assets[file] = newSourceOrFunction;
+		}
+		if (assetInfoUpdateOrFunction !== undefined) {
+			const oldInfo = this.assetsInfo.get(file);
+			if (typeof assetInfoUpdateOrFunction === "function") {
+				this.assetsInfo.set(file, assetInfoUpdateOrFunction(oldInfo || {}));
+			} else {
+				this.assetsInfo.set(
+					file,
+					Object.assign({}, oldInfo, assetInfoUpdateOrFunction)
+				);
+			}
+		}
+	}
+
+	getAssets() {
+		/** @type {Asset[]} */
+		const array = [];
+		for (const assetName of Object.keys(this.assets)) {
+			if (Object.prototype.hasOwnProperty.call(this.assets, assetName)) {
+				array.push({
+					name: assetName,
+					source: this.assets[assetName],
+					info: this.assetsInfo.get(assetName) || {}
+				});
+			}
+		}
+		return array;
+	}
+
+	/**
+	 * @param {string} name the name of the asset
+	 * @returns {Asset | undefined} the asset or undefined when not found
+	 */
+	getAsset(name) {
+		if (!Object.prototype.hasOwnProperty.call(this.assets, name))
+			return undefined;
+		return {
+			name,
+			source: this.assets[name],
+			info: this.assetsInfo.get(name) || {}
+		};
+	}
+
+	createModuleAssets() {
+		for (let i = 0; i < this.modules.length; i++) {
+			const module = this.modules[i];
+			if (module.buildInfo.assets) {
+				const assetsInfo = module.buildInfo.assetsInfo;
+				for (const assetName of Object.keys(module.buildInfo.assets)) {
+					const fileName = this.getPath(assetName);
+					this.emitAsset(
+						fileName,
+						module.buildInfo.assets[assetName],
+						assetsInfo ? assetsInfo.get(assetName) : undefined
+					);
+					this.hooks.moduleAsset.call(module, fileName);
+				}
+			}
+		}
+	}
+
+	createChunkAssets() {
+		const outputOptions = this.outputOptions;
+		const cachedSourceMap = new Map();
+		/** @type {Map<string, {hash: string, source: Source, chunk: Chunk}>} */
+		const alreadyWrittenFiles = 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;
+					const pathAndInfo = this.getPathWithInfo(
+						filenameTemplate,
+						fileManifest.pathOptions
+					);
+					file = pathAndInfo.path;
+					const assetInfo = pathAndInfo.info;
+
+					// check if the same filename was already written by another chunk
+					const alreadyWritten = alreadyWrittenFiles.get(file);
+					if (alreadyWritten !== undefined) {
+						if (alreadyWritten.hash === usedHash) {
+							if (this.cache) {
+								this.cache[cacheName] = {
+									hash: usedHash,
+									source: alreadyWritten.source
+								};
+							}
+							chunk.files.push(file);
+							this.hooks.chunkAsset.call(chunk, file);
+							continue;
+						} else {
+							throw new Error(
+								`Conflict: Multiple chunks emit assets to the same filename ${file}` +
+									` (chunks ${alreadyWritten.chunk.id} and ${chunk.id})`
+							);
+						}
+					}
+					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
+							};
+						}
+					}
+					this.emitAsset(file, source, assetInfo);
+					chunk.files.push(file);
+					this.hooks.chunkAsset.call(chunk, file);
+					alreadyWrittenFiles.set(file, {
+						hash: usedHash,
+						source,
+						chunk
+					});
+				}
+			} catch (err) {
+				this.errors.push(
+					new ChunkRenderError(chunk, file || filenameTemplate, err)
+				);
+			}
+		}
+	}
+
+	/**
+	 * @param {string} filename used to get asset path with hash
+	 * @param {TODO=} data // TODO: figure out this param type
+	 * @returns {string} interpolated path
+	 */
+	getPath(filename, data) {
+		data = data || {};
+		data.hash = data.hash || this.hash;
+		return this.mainTemplate.getAssetPath(filename, data);
+	}
+
+	/**
+	 * @param {string} filename used to get asset path with hash
+	 * @param {TODO=} data // TODO: figure out this param type
+	 * @returns {{ path: string, info: AssetInfo }} interpolated path and asset info
+	 */
+	getPathWithInfo(filename, data) {
+		data = data || {};
+		data.hash = data.hash || this.hash;
+		return this.mainTemplate.getAssetPathWithInfo(filename, data);
+	}
+
+	/**
+	 * This function allows you to run another instance of webpack inside of webpack however as
+	 * a child with different settings and configurations (if desired) applied. It copies all hooks, plugins
+	 * from parent (or top level compiler) and creates a child Compilation
+	 *
+	 * @param {string} name name of the child compiler
+	 * @param {TODO} outputOptions // Need to convert config schema to types for this
+	 * @param {Plugin[]} plugins webpack plugins that will be applied
+	 * @returns {Compiler} creates a child Compiler instance
+	 */
+	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() {
+		/** @type {Set<number|string>} */
+		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(
+	/**
+	 * @deprecated
+	 * @param {string} name Name
+	 * @param {any[]} args Other arguments
+	 * @returns {void}
+	 * @this {Compilation}
+	 */
+	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(
+		/**
+		 * @deprecated
+		 * @this {Compilation}
+		 * @returns {TODO} module template
+		 */
+		function() {
+			return this.moduleTemplates.javascript;
+		},
+		"Compilation.moduleTemplate: Use Compilation.moduleTemplates.javascript instead"
+	),
+	set: util.deprecate(
+		/**
+		 * @deprecated
+		 * @param {ModuleTemplate} value Template value
+		 * @this {Compilation}
+		 * @returns {void}
+		 */
+		function(value) {
+			this.moduleTemplates.javascript = value;
+		},
+		"Compilation.moduleTemplate: Use Compilation.moduleTemplates.javascript instead."
+	)
+});
+
+module.exports = Compilation;