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1 files changed, 37 insertions, 0 deletions

diff --git a/node_modules/webpack/lib/WarnCaseSensitiveModulesPlugin.js b/node_modules/webpack/lib/WarnCaseSensitiveModulesPlugin.js
new file mode 100644
index 00000000..867a33fe
--- /dev/null
+++ b/node_modules/webpack/lib/WarnCaseSensitiveModulesPlugin.js
@@ -0,0 +1,37 @@
+/*
+	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;