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Dependency.js
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Mon, Nov 18, 11:15

Dependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("./ChunkGraph")} ChunkGraph */
/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
/** @typedef {import("./Module")} Module */
/** @typedef {import("./ModuleGraph")} ModuleGraph */
/** @typedef {import("./ModuleGraphConnection")} ModuleGraphConnection */
/** @typedef {import("./ModuleGraphConnection").ConnectionState} ConnectionState */
/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
/** @typedef {import("./WebpackError")} WebpackError */
/** @typedef {import("./util/Hash")} Hash */
/** @typedef {import("./util/runtime").RuntimeSpec} RuntimeSpec */
/**
* @typedef {Object} UpdateHashContext
* @property {ChunkGraph} chunkGraph
* @property {RuntimeSpec} runtime
* @property {RuntimeTemplate=} runtimeTemplate
*/
/**
* @typedef {Object} SourcePosition
* @property {number} line
* @property {number=} column
*/
/**
* @typedef {Object} RealDependencyLocation
* @property {SourcePosition} start
* @property {SourcePosition=} end
* @property {number=} index
*/
/**
* @typedef {Object} SyntheticDependencyLocation
* @property {string} name
* @property {number=} index
*/
/** @typedef {SyntheticDependencyLocation|RealDependencyLocation} DependencyLocation */
/**
* @typedef {Object} ExportSpec
* @property {string} name the name of the export
* @property {boolean=} canMangle can the export be renamed (defaults to true)
* @property {boolean=} terminalBinding is the export a terminal binding that should be checked for export star conflicts
* @property {(string | ExportSpec)[]=} exports nested exports
* @property {ModuleGraphConnection=} from when reexported: from which module
* @property {string[] | null=} export when reexported: from which export
*/
/**
* @typedef {Object} ExportsSpec
* @property {(string | ExportSpec)[] | true | null} exports exported names, true for unknown exports or null for no exports
* @property {Set<string>=} excludeExports when exports = true, list of unaffected exports
* @property {ModuleGraphConnection=} from when reexported: from which module
* @property {boolean=} canMangle can the export be renamed (defaults to true)
* @property {boolean=} terminalBinding are the exports terminal bindings that should be checked for export star conflicts
* @property {Module[]=} dependencies module on which the result depends on
*/
/**
* @typedef {Object} ReferencedExport
* @property {string[]} name name of the referenced export
* @property {boolean=} canMangle when false, referenced export can not be mangled, defaults to true
*/
class Dependency {
constructor() {
// TODO check if this can be moved into ModuleDependency
/** @type {boolean} */
this.weak = false;
// TODO check if this can be moved into ModuleDependency
/** @type {boolean} */
this.optional = false;
/** @type {DependencyLocation} */
this.loc = undefined;
}
/**
* @returns {string} a display name for the type of dependency
*/
get type() {
return "unknown";
}
/**
* @returns {string} a dependency category, typical categories are "commonjs", "amd", "esm"
*/
get category() {
return "unknown";
}
/**
* @returns {string | null} an identifier to merge equal requests
*/
getResourceIdentifier() {
return null;
}
/**
* Returns the referenced module and export
* @deprecated
* @param {ModuleGraph} moduleGraph module graph
* @returns {never} throws error
*/
getReference(moduleGraph) {
throw new Error(
"Dependency.getReference was removed in favor of Dependency.getReferencedExports, ModuleGraph.getModule and ModuleGraph.getConnection().active"
);
}
/**
* Returns list of exports referenced by this dependency
* @param {ModuleGraph} moduleGraph module graph
* @param {RuntimeSpec} runtime the runtime for which the module is analysed
* @returns {(string[] | ReferencedExport)[]} referenced exports
*/
getReferencedExports(moduleGraph, runtime) {
return Dependency.EXPORTS_OBJECT_REFERENCED;
}
/**
* @param {ModuleGraph} moduleGraph module graph
* @returns {function(ModuleGraphConnection, RuntimeSpec): ConnectionState} function to determine if the connection is active
*/
getCondition(moduleGraph) {
return null;
}
/**
* Returns the exported names
* @param {ModuleGraph} moduleGraph module graph
* @returns {ExportsSpec | undefined} export names
*/
getExports(moduleGraph) {
return undefined;
}
/**
* Returns warnings
* @param {ModuleGraph} moduleGraph module graph
* @returns {WebpackError[]} warnings
*/
getWarnings(moduleGraph) {
return null;
}
/**
* Returns errors
* @param {ModuleGraph} moduleGraph module graph
* @returns {WebpackError[]} errors
*/
getErrors(moduleGraph) {
return null;
}
/**
* Update the hash
* @param {Hash} hash hash to be updated
* @param {UpdateHashContext} context context
* @returns {void}
*/
updateHash(hash, context) {
const { chunkGraph } = context;
const module = chunkGraph.moduleGraph.getModule(this);
if (module) {
hash.update(chunkGraph.getModuleId(module) + "");
}
}
/**
* implement this method to allow the occurrence order plugin to count correctly
* @returns {number} count how often the id is used in this dependency
*/
getNumberOfIdOccurrences() {
return 1;
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {ConnectionState} how this dependency connects the module to referencing modules
*/
getModuleEvaluationSideEffectsState(moduleGraph) {
return true;
}
serialize({ write }) {
write(this.weak);
write(this.optional);
write(this.loc);
}
deserialize({ read }) {
this.weak = read();
this.optional = read();
this.loc = read();
}
}
Dependency.NO_EXPORTS_REFERENCED = [];
Dependency.EXPORTS_OBJECT_REFERENCED = [[]];
Object.defineProperty(Dependency.prototype, "module", {
/**
* @deprecated
* @returns {never} throws
*/
get() {
throw new Error(
"module property was removed from Dependency (use compilation.moduleGraph.getModule(dependency) instead)"
);
},
/**
* @deprecated
* @returns {never} throws
*/
set() {
throw new Error(
"module property was removed from Dependency (use compilation.moduleGraph.updateModule(dependency, module) instead)"
);
}
});
Object.defineProperty(Dependency.prototype, "disconnect", {
get() {
throw new Error(
"disconnect was removed from Dependency (Dependency no longer carries graph specific information)"
);
}
});
module.exports = Dependency;

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