webpack/lib/dependencies/ContextDependency.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
"use strict";
const Dependency = require("../Dependency");
const CriticalDependencyWarning = require("./CriticalDependencyWarning");

const regExpToString = r => (r ? r + "" : "");

class ContextDependency extends Dependency {
	// options: { request, recursive, regExp, include, exclude, mode, chunkName, groupOptions }
	constructor(options) {
		super();
		this.options = options;
		this.userRequest = this.options.request;
		/** @type {false | string} */
		this.critical = false;
		this.hadGlobalOrStickyRegExp = false;
		if (this.options.regExp.global || this.options.regExp.sticky) {
			this.options.regExp = null;
			this.hadGlobalOrStickyRegExp = true;
		}
	}

	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)}`
		);
	}

	getWarnings() {
		let warnings = super.getWarnings() || [];
		if (this.critical) {
			warnings.push(new CriticalDependencyWarning(this.critical));
		}
		if (this.hadGlobalOrStickyRegExp) {
			warnings.push(
				new CriticalDependencyWarning(
					"Contexts can't use RegExps with the 'g' or 'y' flags."
				)
			);
		}
		return warnings;
	}
}

// TODO remove in webpack 5
Object.defineProperty(ContextDependency.prototype, "async", {
	configurable: false,
	get() {
		throw new Error(
			"ContextDependency.async was removed. Use ContextDependency.options.mode instead."
		);
	},
	set() {
		throw new Error(
			"ContextDependency.async was removed. Pass options.mode to constructor instead"
		);
	}
});

module.exports = ContextDependency;