Simplify Windows path calc for NuGet source

.github/workflows/run-build-and-acceptance-tests.yml

@@ -284,7 +284,12 @@ jobs:
           path: ${{ github.workspace }}/nuget
       - name: Add NuGet packages as a local NuGet source
         run: |
-          dotnet nuget add source $(./scripts/normpath $PWD/nuget)
+          echo "PULUMI_LOCAL_NUGET=$PULUMI_LOCAL_NUGET"
+          SOURCE=$(./scripts/normpath $PULUMI_LOCAL_NUGET)
+          echo "SOURCE=$SOURCE"
+          dotnet nuget add source $SOURCE
+        env:
+          PULUMI_LOCAL_NUGET: ${{ github.workspace }}/nuget
       - name: Verify Pulumi Version
         run: |
           which pulumi

scripts/normpath

@@ -5,7 +5,7 @@ GitHub actions workers.
 
 For example, on Windows:
 
-    $ python realpath.py /d/a/pulumi/pulumi/nuget
+    $ ./scripts/normpath "D:\\a\\pulumi\\pulumi/nuget"
     D:\a\pulumi\pulumi\nuget
 
 """
@@ -17,12 +17,6 @@ import sys
 path = sys.argv[1]
 
 if os.name == 'nt':
-    path = pathlib.PureWindowsPath(path)
-    if path.root == '\\':
-        # Assume drive is encoded as /d/x/full/path
-        _, drive, rest = str(path).split('\\', 2)
-        print(pathlib.PureWindowsPath(f'{drive}:\\', rest))
-    else:
-        print(path)
+    print(pathlib.PureWindowsPath(path))
 else:
     print(pathlib.PurePosixPath(path))