Fixing windows paths

lib/helpers.js

@@ -82,7 +82,11 @@ const reduceChunk = (files, chunk, options, auxiliaryFiles) => {
   return Array.from(chunk.files).reduce((prev, path) => {
     let name = chunk.name ? chunk.name : null;
     // chunk name, or for nameless chunks, just map the files directly.
-    name = name ? (options.useEntryKeys ? name : `${name}.${getFileType(path, options)}`) : path;
+    name = name
+      ? options.useEntryKeys && !path.endsWith('.map')
+        ? name
+        : `${name}.${getFileType(path, options)}`
+      : path;
 
     return prev.concat({
       path,

lib/hooks.js

@@ -33,15 +33,7 @@ const beforeRunHook = ({ emitCountMap, manifestFileName }, compiler, callback) =
 };
 
 const emitHook = function emit(
-  {
-    compiler,
-    emitCountMap,
-    manifestAssetId,
-    manifestFileName,
-    moduleAssets,
-    assetTypeModuleAssets,
-    options
-  },
+  { compiler, emitCountMap, manifestAssetId, manifestFileName, moduleAssets, assetTypeModuleAssets, options },
   compilation
 ) {
   const emitCount = emitCountMap.get(manifestFileName) - 1;
@@ -142,11 +134,15 @@ const normalModuleLoaderHook = ({ moduleAssets, assetTypeModuleAssets }, loaderC
   // the "emitFile" callback is never called on asset modules
   // so, we create a different map that can be used later in the "emit" hook
   if (['asset', 'asset/inline', 'asset/resource', 'asset/source'].includes(module.type)) {
+    // This takes the userRequest (which is an absolute path) and turns it into
+    // a relative path to the root context. This is done so that the string
+    // will match asset.info.sourceFilename in the emit hook.
+    let sourceFilename = relative(loaderContext.rootContext, module.userRequest);
+    // at this point, Windows paths use \ in their paths
+    // but in the emit hook, asset.info.sourceFilename fill have UNIX slashes
+    sourceFilename = sourceFilename.replace(/\\/g, '/');
     Object.assign(assetTypeModuleAssets, {
-      // This takes the userRequest (which is an absolute path) and turns it into
-      // a relative path to the root context. This is done so that the string
-      // will match asset.info.sourceFilename in the emit hook.
-      [relative(loaderContext.rootContext, module.userRequest)]: basename(module.userRequest)
+      [sourceFilename]: basename(module.userRequest)
     });
   }