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Viewing file:     WarnCaseSensitiveModulesPlugin.js (1.38 KB)      -rwxrwxrwx

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const CaseSensitiveModulesWarning = require("./CaseSensitiveModulesWarning");

/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./Module")} Module */

class WarnCaseSensitiveModulesPlugin {
	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.compilation.tap(
			"WarnCaseSensitiveModulesPlugin",
			compilation => {
				compilation.hooks.seal.tap("WarnCaseSensitiveModulesPlugin", () => {
					/** @type {Map<string, Map<string, Module>>} */
					const moduleWithoutCase = new Map();
					for (const module of compilation.modules) {
						const identifier = module.identifier();
						const lowerIdentifier = identifier.toLowerCase();
						let map = moduleWithoutCase.get(lowerIdentifier);
						if (map === undefined) {
							map = new Map();
							moduleWithoutCase.set(lowerIdentifier, map);
						}
						map.set(identifier, module);
					}
					for (const pair of moduleWithoutCase) {
						const map = pair[1];
						if (map.size > 1) {
							compilation.warnings.push(
								new CaseSensitiveModulesWarning(
									map.values(),
									compilation.moduleGraph
								)
							);
						}
					}
				});
			}
		);
	}
}

module.exports = WarnCaseSensitiveModulesPlugin;