fix bug for file paths in windows during componentization

Signed-off-by: karthik2804 <karthik.ganeshram@fermyon.com>

Author: karthik2804

.github/workflows/main.yml

@@ -132,7 +132,7 @@ jobs:
   ########
 
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     needs:
       - build
     strategy:
@@ -141,6 +141,9 @@ jobs:
         node-version:
           - '23.10.0'
           # - latest reenable when https://github.com/nodejs/node/issues/57172 is fixed
+        os:
+          - ubuntu-latest
+          - windows-latest
         build-type:
           - 'release'
           - 'debug'

src/componentize.js

@@ -25,8 +25,17 @@ const isWindows = platform === 'win32';
 
 function maybeWindowsPath(path) {
   if (!path) return path;
-  if (!isWindows) return resolve(path);
-  return '//?/' + resolve(path).replace(/\\/g, '/');
+  const resolvedPath = resolve(path);
+  if (!isWindows) return resolvedPath;
+
+  // Strip any existing UNC prefix check both the format we add as well as what
+  //  the windows API returns when using path.resolve
+  let cleanPath = resolvedPath;
+  while (cleanPath.startsWith('\\\\?\\') || cleanPath.startsWith('//?/')) {
+    cleanPath = cleanPath.substring(4);
+  }
+
+  return '//?/' + cleanPath.replace(/\\/g, '/');
 }
 
 /**
@@ -108,7 +117,7 @@ export async function componentize(opts,
       .slice(0, 12)
   );
   await mkdir(tmpDir);
-  const sourceDir = join(tmpDir, 'sources');
+  const sourceDir = maybeWindowsPath(join(tmpDir, 'sources'));
   await mkdir(sourceDir);
 
   let {
@@ -223,7 +232,7 @@ export async function componentize(opts,
     console.log(env);
   }
 
-  let initializerPath = join(sourceDir, 'initializer.js');
+  let initializerPath = maybeWindowsPath(join(sourceDir, 'initializer.js'));
   sourcePath = maybeWindowsPath(sourcePath);
   let workspacePrefix = dirname(sourcePath);