webpack/lib/WarnCaseSensitiveModulesPlugin.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 CaseSensitiveModulesWarning = require("./CaseSensitiveModulesWarning");

class WarnCaseSensitiveModulesPlugin {
	apply(compiler) {
		compiler.hooks.compilation.tap(
			"WarnCaseSensitiveModulesPlugin",
			compilation => {
				compilation.hooks.seal.tap("WarnCaseSensitiveModulesPlugin", () => {
					const moduleWithoutCase = new Map();
					for (const module of compilation.modules) {
						const identifier = module.identifier().toLowerCase();
						const array = moduleWithoutCase.get(identifier);
						if (array) {
							array.push(module);
						} else {
							moduleWithoutCase.set(identifier, [module]);
						}
					}
					for (const pair of moduleWithoutCase) {
						const array = pair[1];
						if (array.length > 1) {
							compilation.warnings.push(new CaseSensitiveModulesWarning(array));
						}
					}
				});
			}
		);
	}
}

module.exports = WarnCaseSensitiveModulesPlugin;