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HarmonyExportSpecifierDependency.js
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Wed, Feb 19, 10:05

HarmonyExportSpecifierDependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const makeSerializable = require("../util/makeSerializable");
const HarmonyExportInitFragment = require("./HarmonyExportInitFragment");
const NullDependency = require("./NullDependency");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../ModuleGraphConnection").ConnectionState} ConnectionState */
class HarmonyExportSpecifierDependency extends NullDependency {
constructor(id, name) {
super();
this.id = id;
this.name = name;
}
get type() {
return "harmony export specifier";
}
/**
* Returns the exported names
* @param {ModuleGraph} moduleGraph module graph
* @returns {ExportsSpec | undefined} export names
*/
getExports(moduleGraph) {
return {
exports: [this.name],
terminalBinding: true,
dependencies: undefined
};
}
/**
* @param {ModuleGraph} moduleGraph the module graph
* @returns {ConnectionState} how this dependency connects the module to referencing modules
*/
getModuleEvaluationSideEffectsState(moduleGraph) {
return false;
}
serialize(context) {
const { write } = context;
write(this.id);
write(this.name);
super.serialize(context);
}
deserialize(context) {
const { read } = context;
this.id = read();
this.name = read();
super.deserialize(context);
}
}
makeSerializable(
HarmonyExportSpecifierDependency,
"webpack/lib/dependencies/HarmonyExportSpecifierDependency"
);
HarmonyExportSpecifierDependency.Template = class HarmonyExportSpecifierDependencyTemplate extends (
NullDependency.Template
) {
/**
* @param {Dependency} dependency the dependency for which the template should be applied
* @param {ReplaceSource} source the current replace source which can be modified
* @param {DependencyTemplateContext} templateContext the context object
* @returns {void}
*/
apply(
dependency,
source,
{ module, moduleGraph, initFragments, runtime, concatenationScope }
) {
const dep = /** @type {HarmonyExportSpecifierDependency} */ (dependency);
if (concatenationScope) {
concatenationScope.registerExport(dep.name, dep.id);
return;
}
const used = moduleGraph
.getExportsInfo(module)
.getUsedName(dep.name, runtime);
if (!used) {
const set = new Set();
set.add(dep.name || "namespace");
initFragments.push(
new HarmonyExportInitFragment(module.exportsArgument, undefined, set)
);
return;
}
const map = new Map();
map.set(used, `/* binding */ ${dep.id}`);
initFragments.push(
new HarmonyExportInitFragment(module.exportsArgument, map, undefined)
);
}
};
module.exports = HarmonyExportSpecifierDependency;

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