chore(ci): stage Windows snapshots on the workspace volume

Author: fengmk2

.github/workflows/ci.yml

@@ -28,28 +28,6 @@ defaults:
     shell: bash
 
 jobs:
-  windows-case-sensitivity-probe:
-    runs-on: namespace-profile-windows-4c-8g
-    steps:
-      - name: Inspect case-sensitive directory support
-        shell: pwsh
-        run: |
-          Get-Volume | Format-Table DriveLetter, FileSystem, FileSystemLabel
-          $key = 'HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem'
-          Get-ItemProperty -Path $key -Name NtfsEnableDirCaseSensitivity -ErrorAction SilentlyContinue
-          New-ItemProperty -Path $key -Name NtfsEnableDirCaseSensitivity -PropertyType DWord -Value 1 -Force | Out-Null
-          Get-ItemProperty -Path $key -Name NtfsEnableDirCaseSensitivity
-          foreach ($root in @([System.IO.Path]::GetTempPath(), $env:RUNNER_TEMP)) {
-            $probe = Join-Path $root ('vp-case-probe-' + [guid]::NewGuid().ToString('N'))
-            New-Item -ItemType Directory -Path $probe -Force | Out-Null
-            Write-Output "Testing $probe"
-            fsutil.exe fsinfo volumeinfo ([System.IO.Path]::GetPathRoot($probe))
-            fsutil.exe file setCaseSensitiveInfo $probe enable
-            Write-Output "setCaseSensitiveInfo exit: $LASTEXITCODE"
-            fsutil.exe file queryCaseSensitiveInfo $probe
-          }
-          exit 0
-
   detect-changes:
     runs-on: ubuntu-latest
     permissions:
@@ -1057,15 +1035,6 @@ jobs:
       - uses: taiki-e/checkout-action@7d1e50e93dc4fb3bba58f85018fadf77898aee8b # v1.4.2
       - uses: ./.github/actions/clone
 
-      # Windows Server images without WSL can leave per-directory NTFS case
-      # sensitivity disabled. The shim regression fixture enables it on an
-      # empty directory and asserts that differently cased names are distinct.
-      - name: Enable per-directory NTFS case sensitivity
-        shell: pwsh
-        run: |
-          New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem' `
-            -Name NtfsEnableDirCaseSensitivity -PropertyType DWord -Value 1 -Force | Out-Null
-
       # Route TEMP/TMP onto a Dev Drive (ReFS): staged fixture workspaces
       # live under os.tmpdir() and must resolve pnpm junction reparse points
       # cleanly. NTFS-on-C: preserves the junction-target backslashes during
@@ -1155,6 +1124,10 @@ jobs:
           cargo-nextest nextest run --archive-file windows-snapshot-tests.tar.zst --workspace-remap . --no-fail-fast --partition hash:${{ matrix.shard }}/3
         env:
           RUST_BACKTRACE: '1'
+          # Rust's GetTempPath2 ignores TEMP/TMP under the SYSTEM account.
+          # Use the runner's NTFS workspace volume: C:\Windows\SystemTemp
+          # rejects the case-sensitive directory flag on these hosts.
+          SystemTemp: ${{ runner.temp }}
           # Keep Windows env parity with the `test` recipe in justfile.
           __COMPAT_LAYER: RunAsInvoker