Issue 5535 - Bundle paths should be relative in the files dict

webpack_runner.js

Index: webpack_runner.js
diff --git a/webpack_runner.js b/webpack_runner.js
index 437bec1c7855d01e80c22c2258048f098757762e..b04016265abc109cbb9597c2bb5fdc8fc10c5742 100644
--- a/webpack_runner.js
+++ b/webpack_runner.js
@@ -137,9 +137,11 @@ process.stdin.on("end", () =>
       for (let config of options)
       {
         let filepath = path.join(config.output.path, config.output.filename);
-        let mappath = filepath + ".map";
-        files[filepath] = memoryFS.readFileSync(filepath, "utf-8");
-        files[mappath] = memoryFS.readFileSync(mappath, "utf-8");
+        let relativeFilepath = path.relative("/", filepath);
+        files[relativeFilepath] = memoryFS.readFileSync(filepath, "utf-8");
+        files[relativeFilepath + ".map"] = memoryFS.readFileSync(
+          filepath + ".map", "utf-8"
+        );
       }
 
       console.log(JSON.stringify(files));