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CommonJsFullRequireDependency.js
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Mon, Feb 10, 11:23

CommonJsFullRequireDependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Template = require("../Template");
const { equals } = require("../util/ArrayHelpers");
const makeSerializable = require("../util/makeSerializable");
const propertyAccess = require("../util/propertyAccess");
const ModuleDependency = require("./ModuleDependency");
/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Dependency")} Dependency */
/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */
class CommonJsFullRequireDependency extends ModuleDependency {
/**
* @param {string} request the request string
* @param {[number, number]} range location in source code
* @param {string[]} names accessed properties on module
*/
constructor(request, range, names) {
super(request);
this.range = range;
this.names = names;
this.call = false;
this.asiSafe = undefined;
}
/**
* 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) {
if (this.call) {
const importedModule = moduleGraph.getModule(this);
if (
!importedModule ||
importedModule.getExportsType(moduleGraph, false) !== "namespace"
) {
return [this.names.slice(0, -1)];
}
}
return [this.names];
}
serialize(context) {
const { write } = context;
write(this.names);
write(this.call);
write(this.asiSafe);
super.serialize(context);
}
deserialize(context) {
const { read } = context;
this.names = read();
this.call = read();
this.asiSafe = read();
super.deserialize(context);
}
get type() {
return "cjs full require";
}
get category() {
return "commonjs";
}
}
CommonJsFullRequireDependency.Template = class CommonJsFullRequireDependencyTemplate extends (
ModuleDependency.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,
runtimeTemplate,
moduleGraph,
chunkGraph,
runtimeRequirements,
runtime,
initFragments
}
) {
const dep = /** @type {CommonJsFullRequireDependency} */ (dependency);
if (!dep.range) return;
const importedModule = moduleGraph.getModule(dep);
let requireExpr = runtimeTemplate.moduleExports({
module: importedModule,
chunkGraph,
request: dep.request,
weak: dep.weak,
runtimeRequirements
});
const ids = dep.names;
const usedImported = moduleGraph
.getExportsInfo(importedModule)
.getUsedName(ids, runtime);
if (usedImported) {
const comment = equals(usedImported, ids)
? ""
: Template.toNormalComment(propertyAccess(ids)) + " ";
requireExpr += `${comment}${propertyAccess(usedImported)}`;
}
source.replace(dep.range[0], dep.range[1] - 1, requireExpr);
}
};
makeSerializable(
CommonJsFullRequireDependency,
"webpack/lib/dependencies/CommonJsFullRequireDependency"
);
module.exports = CommonJsFullRequireDependency;

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