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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const parseJson = require("json-parse-better-errors");
const asyncLib = require("neo-async");
const {
SyncHook,
SyncBailHook,
AsyncParallelHook,
AsyncSeriesHook
} = require("tapable");
const { SizeOnlySource } = require("webpack-sources");
const webpack = require("./");
const Cache = require("./Cache");
const CacheFacade = require("./CacheFacade");
const ChunkGraph = require("./ChunkGraph");
const Compilation = require("./Compilation");
const ConcurrentCompilationError = require("./ConcurrentCompilationError");
const ContextModuleFactory = require("./ContextModuleFactory");
const ModuleGraph = require("./ModuleGraph");
const NormalModuleFactory = require("./NormalModuleFactory");
const RequestShortener = require("./RequestShortener");
const ResolverFactory = require("./ResolverFactory");
const Stats = require("./Stats");
const Watching = require("./Watching");
const WebpackError = require("./WebpackError");
const { Logger } = require("./logging/Logger");
const { join, dirname, mkdirp } = require("./util/fs");
const { makePathsRelative } = require("./util/identifier");
const { isSourceEqual } = require("./util/source");
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("../declarations/WebpackOptions").EntryNormalized} Entry */
/** @typedef {import("../declarations/WebpackOptions").OutputNormalized} OutputOptions */
/** @typedef {import("../declarations/WebpackOptions").WatchOptions} WatchOptions */
/** @typedef {import("../declarations/WebpackOptions").WebpackOptionsNormalized} WebpackOptions */
/** @typedef {import("../declarations/WebpackOptions").WebpackPluginInstance} WebpackPluginInstance */
/** @typedef {import("./Chunk")} Chunk */
/** @typedef {import("./FileSystemInfo").FileSystemInfoEntry} FileSystemInfoEntry */
/** @typedef {import("./Module")} Module */
/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
/** @typedef {import("./util/fs").IntermediateFileSystem} IntermediateFileSystem */
/** @typedef {import("./util/fs").OutputFileSystem} OutputFileSystem */
/** @typedef {import("./util/fs").WatchFileSystem} WatchFileSystem */
/**
* @typedef {Object} CompilationParams
* @property {NormalModuleFactory} normalModuleFactory
* @property {ContextModuleFactory} contextModuleFactory
*/
/**
* @template T
* @callback Callback
* @param {Error=} err
* @param {T=} result
*/
/**
* @callback RunAsChildCallback
* @param {Error=} err
* @param {Chunk[]=} entries
* @param {Compilation=} compilation
*/
/**
* @typedef {Object} AssetEmittedInfo
* @property {Buffer} content
* @property {Source} source
* @property {Compilation} compilation
* @property {string} outputPath
* @property {string} targetPath
*/
/**
* @param {string[]} array an array
* @returns {boolean} true, if the array is sorted
*/
const isSorted = array => {
for (let i = 1; i < array.length; i++) {
if (array[i - 1] > array[i]) return false;
}
return true;
};
/**
* @param {Object} obj an object
* @param {string[]} keys the keys of the object
* @returns {Object} the object with properties sorted by property name
*/
const sortObject = (obj, keys) => {
const o = {};
for (const k of keys.sort()) {
o[k] = obj[k];
}
return o;
};
/**
* @param {string} filename filename
* @param {string | string[] | undefined} hashes list of hashes
* @returns {boolean} true, if the filename contains any hash
*/
const includesHash = (filename, hashes) => {
if (!hashes) return false;
if (Array.isArray(hashes)) {
return hashes.some(hash => filename.includes(hash));
} else {
return filename.includes(hashes);
}
};
class Compiler {
/**
* @param {string} context the compilation path
*/
constructor(context) {
this.hooks = Object.freeze({
/** @type {SyncHook<[]>} */
initialize: new SyncHook([]),
/** @type {SyncBailHook<[Compilation], boolean>} */
shouldEmit: new SyncBailHook(["compilation"]),
/** @type {AsyncSeriesHook<[Stats]>} */
done: new AsyncSeriesHook(["stats"]),
/** @type {SyncHook<[Stats]>} */
afterDone: new SyncHook(["stats"]),
/** @type {AsyncSeriesHook<[]>} */
additionalPass: new AsyncSeriesHook([]),
/** @type {AsyncSeriesHook<[Compiler]>} */
beforeRun: new AsyncSeriesHook(["compiler"]),
/** @type {AsyncSeriesHook<[Compiler]>} */
run: new AsyncSeriesHook(["compiler"]),
/** @type {AsyncSeriesHook<[Compilation]>} */
emit: new AsyncSeriesHook(["compilation"]),
/** @type {AsyncSeriesHook<[string, AssetEmittedInfo]>} */
assetEmitted: new AsyncSeriesHook(["file", "info"]),
/** @type {AsyncSeriesHook<[Compilation]>} */
afterEmit: new AsyncSeriesHook(["compilation"]),
/** @type {SyncHook<[Compilation, CompilationParams]>} */
thisCompilation: new SyncHook(["compilation", "params"]),
/** @type {SyncHook<[Compilation, CompilationParams]>} */
compilation: new SyncHook(["compilation", "params"]),
/** @type {SyncHook<[NormalModuleFactory]>} */
normalModuleFactory: new SyncHook(["normalModuleFactory"]),
/** @type {SyncHook<[ContextModuleFactory]>} */
contextModuleFactory: new SyncHook(["contextModuleFactory"]),
/** @type {AsyncSeriesHook<[CompilationParams]>} */
beforeCompile: new AsyncSeriesHook(["params"]),
/** @type {SyncHook<[CompilationParams]>} */
compile: new SyncHook(["params"]),
/** @type {AsyncParallelHook<[Compilation]>} */
make: new AsyncParallelHook(["compilation"]),
/** @type {AsyncParallelHook<[Compilation]>} */
finishMake: new AsyncSeriesHook(["compilation"]),
/** @type {AsyncSeriesHook<[Compilation]>} */
afterCompile: new AsyncSeriesHook(["compilation"]),
/** @type {AsyncSeriesHook<[Compiler]>} */
watchRun: new AsyncSeriesHook(["compiler"]),
/** @type {SyncHook<[Error]>} */
failed: new SyncHook(["error"]),
/** @type {SyncHook<[string | null, number]>} */
invalid: new SyncHook(["filename", "changeTime"]),
/** @type {SyncHook<[]>} */
watchClose: new SyncHook([]),
/** @type {AsyncSeriesHook<[]>} */
shutdown: new AsyncSeriesHook([]),
/** @type {SyncBailHook<[string, string, any[]], true>} */
infrastructureLog: new SyncBailHook(["origin", "type", "args"]),
// TODO the following hooks are weirdly located here
// TODO move them for webpack 5
/** @type {SyncHook<[]>} */
environment: new SyncHook([]),
/** @type {SyncHook<[]>} */
afterEnvironment: new SyncHook([]),
/** @type {SyncHook<[Compiler]>} */
afterPlugins: new SyncHook(["compiler"]),
/** @type {SyncHook<[Compiler]>} */
afterResolvers: new SyncHook(["compiler"]),
/** @type {SyncBailHook<[string, Entry], boolean>} */
entryOption: new SyncBailHook(["context", "entry"])
});
this.webpack = webpack;
/** @type {string=} */
this.name = undefined;
/** @type {Compilation=} */
this.parentCompilation = undefined;
/** @type {Compiler} */
this.root = this;
/** @type {string} */
this.outputPath = "";
/** @type {Watching} */
this.watching = undefined;
/** @type {OutputFileSystem} */
this.outputFileSystem = null;
/** @type {IntermediateFileSystem} */
this.intermediateFileSystem = null;
/** @type {InputFileSystem} */
this.inputFileSystem = null;
/** @type {WatchFileSystem} */
this.watchFileSystem = null;
/** @type {string|null} */
this.recordsInputPath = null;
/** @type {string|null} */
this.recordsOutputPath = null;
this.records = {};
/** @type {Set<string>} */
this.managedPaths = new Set();
/** @type {Set<string>} */
this.immutablePaths = new Set();
/** @type {ReadonlySet<string>} */
this.modifiedFiles = undefined;
/** @type {ReadonlySet<string>} */
this.removedFiles = undefined;
/** @type {ReadonlyMap<string, FileSystemInfoEntry | "ignore" | null>} */
this.fileTimestamps = undefined;
/** @type {ReadonlyMap<string, FileSystemInfoEntry | "ignore" | null>} */
this.contextTimestamps = undefined;
/** @type {number} */
this.fsStartTime = undefined;
/** @type {ResolverFactory} */
this.resolverFactory = new ResolverFactory();
this.infrastructureLogger = undefined;
/** @type {WebpackOptions} */
this.options = /** @type {WebpackOptions} */ ({});
this.context = context;
this.requestShortener = new RequestShortener(context, this.root);
this.cache = new Cache();
this.compilerPath = "";
/** @type {boolean} */
this.running = false;
/** @type {boolean} */
this.idle = false;
/** @type {boolean} */
this.watchMode = false;
/** @type {Compilation} */
this._lastCompilation = undefined;
/** @type {NormalModuleFactory} */
this._lastNormalModuleFactory = undefined;
/** @private @type {WeakMap<Source, { sizeOnlySource: SizeOnlySource, writtenTo: Map<string, number> }>} */
this._assetEmittingSourceCache = new WeakMap();
/** @private @type {Map<string, number>} */
this._assetEmittingWrittenFiles = new Map();
/** @private @type {Set<string>} */
this._assetEmittingPreviousFiles = new Set();
}
/**
* @param {string} name cache name
* @returns {CacheFacade} the cache facade instance
*/
getCache(name) {
return new CacheFacade(this.cache, `${this.compilerPath}${name}`);
}
/**
* @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
*/
getInfrastructureLogger(name) {
if (!name) {
throw new TypeError(
"Compiler.getInfrastructureLogger(name) called without a name"
);
}
return new Logger(
(type, args) => {
if (typeof name === "function") {
name = name();
if (!name) {
throw new TypeError(
"Compiler.getInfrastructureLogger(name) called with a function not returning a name"
);
}
}
if (this.hooks.infrastructureLog.call(name, type, args) === undefined) {
if (this.infrastructureLogger !== undefined) {
this.infrastructureLogger(name, type, args);
}
}
},
childName => {
if (typeof name === "function") {
if (typeof childName === "function") {
return this.getInfrastructureLogger(() => {
if (typeof name === "function") {
name = name();
if (!name) {
throw new TypeError(
"Compiler.getInfrastructureLogger(name) called with a function not returning a name"
);
}
}
if (typeof childName === "function") {
childName = childName();
if (!childName) {
throw new TypeError(
"Logger.getChildLogger(name) called with a function not returning a name"
);
}
}
return `${name}/${childName}`;
});
} else {
return this.getInfrastructureLogger(() => {
if (typeof name === "function") {
name = name();
if (!name) {
throw new TypeError(
"Compiler.getInfrastructureLogger(name) called with a function not returning a name"
);
}
}
return `${name}/${childName}`;
});
}
} else {
if (typeof childName === "function") {
return this.getInfrastructureLogger(() => {
if (typeof childName === "function") {
childName = childName();
if (!childName) {
throw new TypeError(
"Logger.getChildLogger(name) called with a function not returning a name"
);
}
}
return `${name}/${childName}`;
});
} else {
return this.getInfrastructureLogger(`${name}/${childName}`);
}
}
}
);
}
// TODO webpack 6: solve this in a better way
// e.g. move compilation specific info from Modules into ModuleGraph
_cleanupLastCompilation() {
if (this._lastCompilation !== undefined) {
for (const module of this._lastCompilation.modules) {
ChunkGraph.clearChunkGraphForModule(module);
ModuleGraph.clearModuleGraphForModule(module);
module.cleanupForCache();
}
for (const chunk of this._lastCompilation.chunks) {
ChunkGraph.clearChunkGraphForChunk(chunk);
}
this._lastCompilation = undefined;
}
}
// TODO webpack 6: solve this in a better way
_cleanupLastNormalModuleFactory() {
if (this._lastNormalModuleFactory !== undefined) {
this._lastNormalModuleFactory.cleanupForCache();
this._lastNormalModuleFactory = undefined;
}
}
/**
* @param {WatchOptions} watchOptions the watcher's options
* @param {Callback<Stats>} handler signals when the call finishes
* @returns {Watching} a compiler watcher
*/
watch(watchOptions, handler) {
if (this.running) {
return handler(new ConcurrentCompilationError());
}
this.running = true;
this.watchMode = true;
this.watching = new Watching(this, watchOptions, handler);
return this.watching;
}
/**
* @param {Callback<Stats>} callback signals when the call finishes
* @returns {void}
*/
run(callback) {
if (this.running) {
return callback(new ConcurrentCompilationError());
}
let logger;
const finalCallback = (err, stats) => {
if (logger) logger.time("beginIdle");
this.idle = true;
this.cache.beginIdle();
this.idle = true;
if (logger) logger.timeEnd("beginIdle");
this.running = false;
if (err) {
this.hooks.failed.call(err);
}
if (callback !== undefined) callback(err, stats);
this.hooks.afterDone.call(stats);
};
const startTime = Date.now();
this.running = true;
const onCompiled = (err, compilation) => {
if (err) return finalCallback(err);
if (this.hooks.shouldEmit.call(compilation) === false) {
compilation.startTime = startTime;
compilation.endTime = Date.now();
const stats = new Stats(compilation);
this.hooks.done.callAsync(stats, err => {
if (err) return finalCallback(err);
return finalCallback(null, stats);
});
return;
}
process.nextTick(() => {
logger = compilation.getLogger("webpack.Compiler");
logger.time("emitAssets");
this.emitAssets(compilation, err => {
logger.timeEnd("emitAssets");
if (err) return finalCallback(err);
if (compilation.hooks.needAdditionalPass.call()) {
compilation.needAdditionalPass = true;
compilation.startTime = startTime;
compilation.endTime = Date.now();
logger.time("done hook");
const stats = new Stats(compilation);
this.hooks.done.callAsync(stats, err => {
logger.timeEnd("done hook");
if (err) return finalCallback(err);
this.hooks.additionalPass.callAsync(err => {
if (err) return finalCallback(err);
this.compile(onCompiled);
});
});
return;
}
logger.time("emitRecords");
this.emitRecords(err => {
logger.timeEnd("emitRecords");
if (err) return finalCallback(err);
compilation.startTime = startTime;
compilation.endTime = Date.now();
logger.time("done hook");
const stats = new Stats(compilation);
this.hooks.done.callAsync(stats, err => {
logger.timeEnd("done hook");
if (err) return finalCallback(err);
this.cache.storeBuildDependencies(
compilation.buildDependencies,
err => {
if (err) return finalCallback(err);
return finalCallback(null, stats);
}
);
});
});
});
});
};
const run = () => {
this.hooks.beforeRun.callAsync(this, err => {
if (err) return finalCallback(err);
this.hooks.run.callAsync(this, err => {
if (err) return finalCallback(err);
this.readRecords(err => {
if (err) return finalCallback(err);
this.compile(onCompiled);
});
});
});
};
if (this.idle) {
this.cache.endIdle(err => {
if (err) return finalCallback(err);
this.idle = false;
run();
});
} else {
run();
}
}
/**
* @param {RunAsChildCallback} callback signals when the call finishes
* @returns {void}
*/
runAsChild(callback) {
const startTime = Date.now();
this.compile((err, compilation) => {
if (err) return callback(err);
this.parentCompilation.children.push(compilation);
for (const { name, source, info } of compilation.getAssets()) {
this.parentCompilation.emitAsset(name, source, info);
}
const entries = [];
for (const ep of compilation.entrypoints.values()) {
entries.push(...ep.chunks);
}
compilation.startTime = startTime;
compilation.endTime = Date.now();
return callback(null, entries, compilation);
});
}
purgeInputFileSystem() {
if (this.inputFileSystem && this.inputFileSystem.purge) {
this.inputFileSystem.purge();
}
}
/**
* @param {Compilation} compilation the compilation
* @param {Callback<void>} callback signals when the assets are emitted
* @returns {void}
*/
emitAssets(compilation, callback) {
let outputPath;
const emitFiles = err => {
if (err) return callback(err);
const assets = compilation.getAssets();
compilation.assets = { ...compilation.assets };
/** @type {Map<string, { path: string, source: Source, size: number, waiting: { cacheEntry: any, file: string }[] }>} */
const caseInsensitiveMap = new Map();
/** @type {Set<string>} */
const allTargetPaths = new Set();
asyncLib.forEachLimit(
assets,
15,
({ name: file, source, info }, callback) => {
let targetFile = file;
let immutable = info.immutable;
const queryStringIdx = targetFile.indexOf("?");
if (queryStringIdx >= 0) {
targetFile = targetFile.substr(0, queryStringIdx);
// We may remove the hash, which is in the query string
// So we recheck if the file is immutable
// This doesn't cover all cases, but immutable is only a performance optimization anyway
immutable =
immutable &&
(includesHash(targetFile, info.contenthash) ||
includesHash(targetFile, info.chunkhash) ||
includesHash(targetFile, info.modulehash) ||
includesHash(targetFile, info.fullhash));
}
const writeOut = err => {
if (err) return callback(err);
const targetPath = join(
this.outputFileSystem,
outputPath,
targetFile
);
allTargetPaths.add(targetPath);
// check if the target file has already been written by this Compiler
const targetFileGeneration =
this._assetEmittingWrittenFiles.get(targetPath);
// create an cache entry for this Source if not already existing
let cacheEntry = this._assetEmittingSourceCache.get(source);
if (cacheEntry === undefined) {
cacheEntry = {
sizeOnlySource: undefined,
writtenTo: new Map()
};
this._assetEmittingSourceCache.set(source, cacheEntry);
}
let similarEntry;
const checkSimilarFile = () => {
const caseInsensitiveTargetPath = targetPath.toLowerCase();
similarEntry = caseInsensitiveMap.get(caseInsensitiveTargetPath);
if (similarEntry !== undefined) {
const { path: other, source: otherSource } = similarEntry;
if (isSourceEqual(otherSource, source)) {
// Size may or may not be available at this point.
// If it's not available add to "waiting" list and it will be updated once available
if (similarEntry.size !== undefined) {
updateWithReplacementSource(similarEntry.size);
} else {
if (!similarEntry.waiting) similarEntry.waiting = [];
similarEntry.waiting.push({ file, cacheEntry });
}
alreadyWritten();
} else {
const err =
new WebpackError(`Prevent writing to file that only differs in casing or query string from already written file.
This will lead to a race-condition and corrupted files on case-insensitive file systems.
${targetPath}
${other}`);
err.file = file;
callback(err);
}
return true;
} else {
caseInsensitiveMap.set(
caseInsensitiveTargetPath,
(similarEntry = {
path: targetPath,
source,
size: undefined,
waiting: undefined
})
);
return false;
}
};
/**
* get the binary (Buffer) content from the Source
* @returns {Buffer} content for the source
*/
const getContent = () => {
if (typeof source.buffer === "function") {
return source.buffer();
} else {
const bufferOrString = source.source();
if (Buffer.isBuffer(bufferOrString)) {
return bufferOrString;
} else {
return Buffer.from(bufferOrString, "utf8");
}
}
};
const alreadyWritten = () => {
// cache the information that the Source has been already been written to that location
if (targetFileGeneration === undefined) {
const newGeneration = 1;
this._assetEmittingWrittenFiles.set(targetPath, newGeneration);
cacheEntry.writtenTo.set(targetPath, newGeneration);
} else {
cacheEntry.writtenTo.set(targetPath, targetFileGeneration);
}
callback();
};
/**
* Write the file to output file system
* @param {Buffer} content content to be written
* @returns {void}
*/
const doWrite = content => {
this.outputFileSystem.writeFile(targetPath, content, err => {
if (err) return callback(err);
// information marker that the asset has been emitted
compilation.emittedAssets.add(file);
// cache the information that the Source has been written to that location
const newGeneration =
targetFileGeneration === undefined
? 1
: targetFileGeneration + 1;
cacheEntry.writtenTo.set(targetPath, newGeneration);
this._assetEmittingWrittenFiles.set(targetPath, newGeneration);
this.hooks.assetEmitted.callAsync(
file,
{
content,
source,
outputPath,
compilation,
targetPath
},
callback
);
});
};
const updateWithReplacementSource = size => {
updateFileWithReplacementSource(file, cacheEntry, size);
similarEntry.size = size;
if (similarEntry.waiting !== undefined) {
for (const { file, cacheEntry } of similarEntry.waiting) {
updateFileWithReplacementSource(file, cacheEntry, size);
}
}
};
const updateFileWithReplacementSource = (
file,
cacheEntry,
size
) => {
// Create a replacement resource which only allows to ask for size
// This allows to GC all memory allocated by the Source
// (expect when the Source is stored in any other cache)
if (!cacheEntry.sizeOnlySource) {
cacheEntry.sizeOnlySource = new SizeOnlySource(size);
}
compilation.updateAsset(file, cacheEntry.sizeOnlySource, {
size
});
};
const processExistingFile = stats => {
// skip emitting if it's already there and an immutable file
if (immutable) {
updateWithReplacementSource(stats.size);
return alreadyWritten();
}
const content = getContent();
updateWithReplacementSource(content.length);
// if it exists and content on disk matches content
// skip writing the same content again
// (to keep mtime and don't trigger watchers)
// for a fast negative match file size is compared first
if (content.length === stats.size) {
compilation.comparedForEmitAssets.add(file);
return this.outputFileSystem.readFile(
targetPath,
(err, existingContent) => {
if (
err ||
!content.equals(/** @type {Buffer} */ (existingContent))
) {
return doWrite(content);
} else {
return alreadyWritten();
}
}
);
}
return doWrite(content);
};
const processMissingFile = () => {
const content = getContent();
updateWithReplacementSource(content.length);
return doWrite(content);
};
// if the target file has already been written
if (targetFileGeneration !== undefined) {
// check if the Source has been written to this target file
const writtenGeneration = cacheEntry.writtenTo.get(targetPath);
if (writtenGeneration === targetFileGeneration) {
// if yes, we may skip writing the file
// if it's already there
// (we assume one doesn't modify files while the Compiler is running, other then removing them)
if (this._assetEmittingPreviousFiles.has(targetPath)) {
// We assume that assets from the last compilation say intact on disk (they are not removed)
compilation.updateAsset(file, cacheEntry.sizeOnlySource, {
size: cacheEntry.sizeOnlySource.size()
});
return callback();
} else {
// Settings immutable will make it accept file content without comparing when file exist
immutable = true;
}
} else if (!immutable) {
if (checkSimilarFile()) return;
// We wrote to this file before which has very likely a different content
// skip comparing and assume content is different for performance
// This case happens often during watch mode.
return processMissingFile();
}
}
if (checkSimilarFile()) return;
if (this.options.output.compareBeforeEmit) {
this.outputFileSystem.stat(targetPath, (err, stats) => {
const exists = !err && stats.isFile();
if (exists) {
processExistingFile(stats);
} else {
processMissingFile();
}
});
} else {
processMissingFile();
}
};
if (targetFile.match(/\/|\\/)) {
const fs = this.outputFileSystem;
const dir = dirname(fs, join(fs, outputPath, targetFile));
mkdirp(fs, dir, writeOut);
} else {
writeOut();
}
},
err => {
// Clear map to free up memory
caseInsensitiveMap.clear();
if (err) {
this._assetEmittingPreviousFiles.clear();
return callback(err);
}
this._assetEmittingPreviousFiles = allTargetPaths;
this.hooks.afterEmit.callAsync(compilation, err => {
if (err) return callback(err);
return callback();
});
}
);
};
this.hooks.emit.callAsync(compilation, err => {
if (err) return callback(err);
outputPath = compilation.getPath(this.outputPath, {});
mkdirp(this.outputFileSystem, outputPath, emitFiles);
});
}
/**
* @param {Callback<void>} callback signals when the call finishes
* @returns {void}
*/
emitRecords(callback) {
if (!this.recordsOutputPath) return callback();
const writeFile = () => {
this.outputFileSystem.writeFile(
this.recordsOutputPath,
JSON.stringify(
this.records,
(n, value) => {
if (
typeof value === "object" &&
value !== null &&
!Array.isArray(value)
) {
const keys = Object.keys(value);
if (!isSorted(keys)) {
return sortObject(value, keys);
}
}
return value;
},
2
),
callback
);
};
const recordsOutputPathDirectory = dirname(
this.outputFileSystem,
this.recordsOutputPath
);
if (!recordsOutputPathDirectory) {
return writeFile();
}
mkdirp(this.outputFileSystem, recordsOutputPathDirectory, err => {
if (err) return callback(err);
writeFile();
});
}
/**
* @param {Callback<void>} callback signals when the call finishes
* @returns {void}
*/
readRecords(callback) {
if (!this.recordsInputPath) {
this.records = {};
return callback();
}
this.inputFileSystem.stat(this.recordsInputPath, err => {
// It doesn't exist
// We can ignore this.
if (err) return callback();
this.inputFileSystem.readFile(this.recordsInputPath, (err, content) => {
if (err) return callback(err);
try {
this.records = parseJson(content.toString("utf-8"));
} catch (e) {
e.message = "Cannot parse records: " + e.message;
return callback(e);
}
return callback();
});
});
}
/**
* @param {Compilation} compilation the compilation
* @param {string} compilerName the compiler's name
* @param {number} compilerIndex the compiler's index
* @param {OutputOptions=} outputOptions the output options
* @param {WebpackPluginInstance[]=} plugins the plugins to apply
* @returns {Compiler} a child compiler
*/
createChildCompiler(
compilation,
compilerName,
compilerIndex,
outputOptions,
plugins
) {
const childCompiler = new Compiler(this.context);
childCompiler.name = compilerName;
childCompiler.outputPath = this.outputPath;
childCompiler.inputFileSystem = this.inputFileSystem;
childCompiler.outputFileSystem = null;
childCompiler.resolverFactory = this.resolverFactory;
childCompiler.modifiedFiles = this.modifiedFiles;
childCompiler.removedFiles = this.removedFiles;
childCompiler.fileTimestamps = this.fileTimestamps;
childCompiler.contextTimestamps = this.contextTimestamps;
childCompiler.fsStartTime = this.fsStartTime;
childCompiler.cache = this.cache;
childCompiler.compilerPath = `${this.compilerPath}${compilerName}|${compilerIndex}|`;
const relativeCompilerName = makePathsRelative(
this.context,
compilerName,
this.root
);
if (!this.records[relativeCompilerName]) {
this.records[relativeCompilerName] = [];
}
if (this.records[relativeCompilerName][compilerIndex]) {
childCompiler.records = this.records[relativeCompilerName][compilerIndex];
} else {
this.records[relativeCompilerName].push((childCompiler.records = {}));
}
childCompiler.options = {
...this.options,
output: {
...this.options.output,
...outputOptions
}
};
childCompiler.parentCompilation = compilation;
childCompiler.root = this.root;
if (Array.isArray(plugins)) {
for (const plugin of plugins) {
plugin.apply(childCompiler);
}
}
for (const name in this.hooks) {
if (
![
"make",
"compile",
"emit",
"afterEmit",
"invalid",
"done",
"thisCompilation"
].includes(name)
) {
if (childCompiler.hooks[name]) {
childCompiler.hooks[name].taps = this.hooks[name].taps.slice();
}
}
}
compilation.hooks.childCompiler.call(
childCompiler,
compilerName,
compilerIndex
);
return childCompiler;
}
isChild() {
return !!this.parentCompilation;
}
createCompilation() {
this._cleanupLastCompilation();
return (this._lastCompilation = new Compilation(this));
}
/**
* @param {CompilationParams} params the compilation parameters
* @returns {Compilation} the created compilation
*/
newCompilation(params) {
const compilation = this.createCompilation();
compilation.name = this.name;
compilation.records = this.records;
this.hooks.thisCompilation.call(compilation, params);
this.hooks.compilation.call(compilation, params);
return compilation;
}
createNormalModuleFactory() {
this._cleanupLastNormalModuleFactory();
const normalModuleFactory = new NormalModuleFactory({
context: this.options.context,
fs: this.inputFileSystem,
resolverFactory: this.resolverFactory,
options: this.options.module,
associatedObjectForCache: this.root,
layers: this.options.experiments.layers
});
this._lastNormalModuleFactory = normalModuleFactory;
this.hooks.normalModuleFactory.call(normalModuleFactory);
return normalModuleFactory;
}
createContextModuleFactory() {
const contextModuleFactory = new ContextModuleFactory(this.resolverFactory);
this.hooks.contextModuleFactory.call(contextModuleFactory);
return contextModuleFactory;
}
newCompilationParams() {
const params = {
normalModuleFactory: this.createNormalModuleFactory(),
contextModuleFactory: this.createContextModuleFactory()
};
return params;
}
/**
* @param {Callback<Compilation>} callback signals when the compilation finishes
* @returns {void}
*/
compile(callback) {
const params = this.newCompilationParams();
this.hooks.beforeCompile.callAsync(params, err => {
if (err) return callback(err);
this.hooks.compile.call(params);
const compilation = this.newCompilation(params);
const logger = compilation.getLogger("webpack.Compiler");
logger.time("make hook");
this.hooks.make.callAsync(compilation, err => {
logger.timeEnd("make hook");
if (err) return callback(err);
logger.time("finish make hook");
this.hooks.finishMake.callAsync(compilation, err => {
logger.timeEnd("finish make hook");
if (err) return callback(err);
process.nextTick(() => {
logger.time("finish compilation");
compilation.finish(err => {
logger.timeEnd("finish compilation");
if (err) return callback(err);
logger.time("seal compilation");
compilation.seal(err => {
logger.timeEnd("seal compilation");
if (err) return callback(err);
logger.time("afterCompile hook");
this.hooks.afterCompile.callAsync(compilation, err => {
logger.timeEnd("afterCompile hook");
if (err) return callback(err);
return callback(null, compilation);
});
});
});
});
});
});
});
}
/**
* @param {Callback<void>} callback signals when the compiler closes
* @returns {void}
*/
close(callback) {
if (this.watching) {
// When there is still an active watching, close this first
this.watching.close(err => {
this.close(callback);
});
return;
}
this.hooks.shutdown.callAsync(err => {
if (err) return callback(err);
// Get rid of reference to last compilation to avoid leaking memory
// We can't run this._cleanupLastCompilation() as the Stats to this compilation
// might be still in use. We try to get rid of the reference to the cache instead.
this._lastCompilation = undefined;
this._lastNormalModuleFactory = undefined;
this.cache.shutdown(callback);
});
}
}
module.exports = Compiler;