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ContextDependency.js
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Tue, Feb 4, 11:51

ContextDependency.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const Dependency = require("../Dependency");
const DependencyTemplate = require("../DependencyTemplate");
const makeSerializable = require("../util/makeSerializable");
const memorize = require("../util/memorize");
/** @typedef {import("../ContextModule").ContextOptions} ContextOptions */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../WebpackError")} WebpackError */
const getCriticalDependencyWarning = memorize(() =>
require("./CriticalDependencyWarning")
);
/** @typedef {ContextOptions & { request: string }} ContextDependencyOptions */
const regExpToString = r => (r ? r + "" : "");
class ContextDependency extends Dependency {
/**
* @param {ContextDependencyOptions} options options for the context module
*/
constructor(options) {
super();
this.options = options;
this.userRequest = this.options && this.options.request;
/** @type {false | string} */
this.critical = false;
this.hadGlobalOrStickyRegExp = false;
if (
this.options &&
(this.options.regExp.global || this.options.regExp.sticky)
) {
this.options = { ...this.options, regExp: null };
this.hadGlobalOrStickyRegExp = true;
}
this.request = undefined;
this.range = undefined;
this.valueRange = undefined;
// TODO refactor this
this.replaces = undefined;
}
get category() {
return "commonjs";
}
/**
* @returns {string | null} an identifier to merge equal requests
*/
getResourceIdentifier() {
return (
`context${this.options.request} ${this.options.recursive} ` +
`${regExpToString(this.options.regExp)} ${regExpToString(
this.options.include
)} ${regExpToString(this.options.exclude)} ` +
`${this.options.mode} ${this.options.chunkName} ` +
`${JSON.stringify(this.options.groupOptions)}`
);
}
/**
* Returns warnings
* @param {ModuleGraph} moduleGraph module graph
* @returns {WebpackError[]} warnings
*/
getWarnings(moduleGraph) {
let warnings = super.getWarnings(moduleGraph);
if (this.critical) {
if (!warnings) warnings = [];
const CriticalDependencyWarning = getCriticalDependencyWarning();
warnings.push(new CriticalDependencyWarning(this.critical));
}
if (this.hadGlobalOrStickyRegExp) {
if (!warnings) warnings = [];
const CriticalDependencyWarning = getCriticalDependencyWarning();
warnings.push(
new CriticalDependencyWarning(
"Contexts can't use RegExps with the 'g' or 'y' flags."
)
);
}
return warnings;
}
serialize(context) {
const { write } = context;
write(this.options);
write(this.userRequest);
write(this.critical);
write(this.hadGlobalOrStickyRegExp);
write(this.request);
write(this.range);
write(this.valueRange);
write(this.prepend);
write(this.replaces);
super.serialize(context);
}
deserialize(context) {
const { read } = context;
this.options = read();
this.userRequest = read();
this.critical = read();
this.hadGlobalOrStickyRegExp = read();
this.request = read();
this.range = read();
this.valueRange = read();
this.prepend = read();
this.replaces = read();
super.deserialize(context);
}
}
makeSerializable(
ContextDependency,
"webpack/lib/dependencies/ContextDependency"
);
ContextDependency.Template = DependencyTemplate;
module.exports = ContextDependency;

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