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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { RawSource } = require("webpack-sources");
const OriginalSource = require("webpack-sources").OriginalSource;
const Module = require("./Module");
const {
JAVASCRIPT_TYPES,
RUNTIME_TYPES
} = require("./ModuleSourceTypeConstants");
const { WEBPACK_MODULE_TYPE_RUNTIME } = require("./ModuleTypeConstants");
/** @typedef {import("./config/defaults").WebpackOptionsNormalizedWithDefaults} WebpackOptions */
/** @typedef {import("./Chunk")} Chunk */
/** @typedef {import("./ChunkGraph")} ChunkGraph */
/** @typedef {import("./Compilation")} Compilation */
/** @typedef {import("./Dependency").UpdateHashContext} UpdateHashContext */
/** @typedef {import("./Generator").SourceTypes} SourceTypes */
/** @typedef {import("./Module").BuildMeta} BuildMeta */
/** @typedef {import("./Module").BuildInfo} BuildInfo */
/** @typedef {import("./Module").BuildCallback} BuildCallback */
/** @typedef {import("./Module").CodeGenerationContext} CodeGenerationContext */
/** @typedef {import("./Module").CodeGenerationResult} CodeGenerationResult */
/** @typedef {import("./Module").NeedBuildCallback} NeedBuildCallback */
/** @typedef {import("./Module").NeedBuildContext} NeedBuildContext */
/** @typedef {import("./Module").Sources} Sources */
/** @typedef {import("./RequestShortener")} RequestShortener */
/** @typedef {import("./ResolverFactory").ResolverWithOptions} ResolverWithOptions */
/** @typedef {import("./util/Hash")} Hash */
/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
/** @typedef {import("./Module").BasicSourceTypes} BasicSourceTypes */
class RuntimeModule extends Module {
/**
* Creates an instance of RuntimeModule.
* @param {string} name a readable name
* @param {number=} stage an optional stage
*/
constructor(name, stage = 0) {
super(WEBPACK_MODULE_TYPE_RUNTIME);
/** @type {string} */
this.name = name;
/** @type {number} */
this.stage = stage;
/** @type {BuildMeta} */
this.buildMeta = {};
/** @type {BuildInfo} */
this.buildInfo = {};
/** @type {Compilation | undefined} */
this.compilation = undefined;
/** @type {Chunk | undefined} */
this.chunk = undefined;
/** @type {ChunkGraph | undefined} */
this.chunkGraph = undefined;
/** @type {boolean} */
this.fullHash = false;
/** @type {boolean} */
this.dependentHash = false;
/** @type {string | undefined | null} */
this._cachedGeneratedCode = undefined;
}
/**
* Processes the provided compilation.
* @param {Compilation} compilation the compilation
* @param {Chunk} chunk the chunk
* @param {ChunkGraph} chunkGraph the chunk graph
* @returns {void}
*/
attach(compilation, chunk, chunkGraph = compilation.chunkGraph) {
this.compilation = compilation;
this.chunk = chunk;
this.chunkGraph = chunkGraph;
}
/**
* Returns the unique identifier used to reference this module.
* @returns {string} a unique identifier of the module
*/
identifier() {
return `webpack/runtime/${this.name}`;
}
/**
* Returns a human-readable identifier for this module.
* @param {RequestShortener} requestShortener the request shortener
* @returns {string} a user readable identifier of the module
*/
readableIdentifier(requestShortener) {
return `webpack/runtime/${this.name}`;
}
/**
* Checks whether the module needs to be rebuilt for the current build state.
* @param {NeedBuildContext} context context info
* @param {NeedBuildCallback} callback callback function, returns true, if the module needs a rebuild
* @returns {void}
*/
needBuild(context, callback) {
return callback(null, false);
}
/**
* Builds the module using the provided compilation context.
* @param {WebpackOptions} options webpack options
* @param {Compilation} compilation the compilation
* @param {ResolverWithOptions} resolver the resolver
* @param {InputFileSystem} fs the file system
* @param {BuildCallback} callback callback function
* @returns {void}
*/
build(options, compilation, resolver, fs, callback) {
// do nothing
// should not be called as runtime modules are added later to the compilation
callback();
}
/**
* Updates the hash with the data contributed by this instance.
* @param {Hash} hash the hash used to track dependencies
* @param {UpdateHashContext} context context
* @returns {void}
*/
updateHash(hash, context) {
hash.update(this.name);
hash.update(`${this.stage}`);
try {
const code =
this.fullHash || this.dependentHash
? // Do not use getGeneratedCode here, because i. e. compilation hash might be not
// ready at this point. We will cache it later instead.
this.generate()
: this.getGeneratedCode();
if (code !== null && code !== undefined) {
hash.update(code);
}
} catch (err) {
hash.update(/** @type {Error} */ (err).message);
}
super.updateHash(hash, context);
}
/**
* Returns the source types this module can generate.
* @returns {SourceTypes} types available (do not mutate)
*/
getSourceTypes() {
return RUNTIME_TYPES;
}
/**
* Basic source types are high-level categories like javascript, css, webassembly, etc.
* We only have built-in knowledge about the javascript basic type here; other basic types may be
* added or changed over time by generators and do not need to be handled or detected here.
*
* Some modules, e.g. RemoteModule, may return non-basic source types like "remote" and "share-init"
* from getSourceTypes(), but their generated output is still JavaScript, i.e. their basic type is JS.
* @returns {BasicSourceTypes} types available (do not mutate)
*/
getSourceBasicTypes() {
return JAVASCRIPT_TYPES;
}
/**
* Generates code and runtime requirements for this module.
* @param {CodeGenerationContext} context context for code generation
* @returns {CodeGenerationResult} result
*/
codeGeneration(context) {
/** @type {Sources} */
const sources = new Map();
const generatedCode = this.getGeneratedCode();
if (generatedCode) {
sources.set(
WEBPACK_MODULE_TYPE_RUNTIME,
this.useSourceMap || this.useSimpleSourceMap
? new OriginalSource(generatedCode, this.identifier())
: new RawSource(generatedCode)
);
}
return {
sources,
runtimeRequirements: null
};
}
/**
* Returns the estimated size for the requested source type.
* @param {string=} type the source type for which the size should be estimated
* @returns {number} the estimated size of the module (must be non-zero)
*/
size(type) {
try {
const source = this.getGeneratedCode();
return source ? source.length : 0;
} catch (_err) {
return 0;
}
}
/* istanbul ignore next */
/**
* Generates runtime code for this runtime module.
* @abstract
* @returns {string | null} runtime code
*/
generate() {
const AbstractMethodError = require("./errors/AbstractMethodError");
throw new AbstractMethodError();
}
/**
* Gets generated code.
* @returns {string | null} runtime code
*/
getGeneratedCode() {
if (this._cachedGeneratedCode) {
return this._cachedGeneratedCode;
}
return (this._cachedGeneratedCode = this.generate());
}
/**
* Returns true, if the runtime module should get it's own scope.
* @returns {boolean} true, if the runtime module should get it's own scope
*/
shouldIsolate() {
return true;
}
}
/**
* Runtime modules without any dependencies to other runtime modules
*/
RuntimeModule.STAGE_NORMAL = 0;
/**
* Runtime modules with simple dependencies on other runtime modules
*/
RuntimeModule.STAGE_BASIC = 5;
/**
* Runtime modules which attach to handlers of other runtime modules
*/
RuntimeModule.STAGE_ATTACH = 10;
/**
* Runtime modules which trigger actions on bootstrap
*/
RuntimeModule.STAGE_TRIGGER = 20;
module.exports = RuntimeModule;