Fix slangpy not using correct slang backend (#7334)

- fix path conversion from linux to windows
- add exit on fail for lib copy

This ensures the slang backend built in CI is
indeed the one used for tests.

1 files changed, 21 insertions, 8 deletions

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 194294b00..3984b1fda 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -287,17 +287,30 @@ jobs:
         shell: pwsh
         run: |
           python --version
-          Write-Host "Cleaning up existing installations..."
-          Start-Process -FilePath "python" -ArgumentList "-m pip uninstall -y slangpy" -Verb RunAs -Wait
-          Write-Host "Installing slangpy..."
-          python -m pip install --no-cache-dir --verbose slangpy --user
-          Write-Host "Getting Python site-packages directory and copying library files (DLL, SO, DYLIB)..."
+          Write-Host "Cleaning up existing installations and installing slangpy..."
+          try {
+            $SLANGPY_LOCATION = python -c "import slangpy; print(slangpy.__file__.rsplit('\\', 2)[0])"
+            Start-Process -FilePath "python" -ArgumentList "-m pip uninstall -y slangpy" -Verb RunAs -Wait
+            if (Test-Path $SLANGPY_LOCATION) {
+              Write-Host "Removing existing slangpy directory at: $SLANGPY_LOCATION"
+              Remove-Item -Path $SLANGPY_LOCATION -Recurse -Force
+            }
+          } catch {
+            Write-Host "slangpy not found or already removed"
+          }
+          python -m pip install --verbose slangpy --user
           $SITE_PACKAGES = python -c "import slangpy; print(slangpy.__file__.rsplit('\\', 2)[0])"
+          $bin_dir = $env:bin_dir -replace '^/c/', 'C:\' -replace '/', '\'
           Write-Host "Site packages directory: $SITE_PACKAGES"
-          Write-Host "Copying library files..."
-          Copy-Item -Path "$bin_dir\*" -Include "*.dll","*.so","*.dylib" -Destination "$SITE_PACKAGES\slangpy\" -Force -ErrorAction Continue
+          Write-Host "bin_dir location: $bin_dir"
+          try {
+            Copy-Item -Path "$bin_dir\slang*.dll" -Destination "$SITE_PACKAGES\slangpy\" -Force -ErrorAction Stop
+          } catch {
+            Write-Error "Failed to copy library files: $_"
+            exit 1
+          }
           Write-Host "Listing files in slangpy directory..."
-          Get-ChildItem -Path "$SITE_PACKAGES\slangpy" | Write-Host
+          Get-ChildItem -Path "$SITE_PACKAGES\slangpy" | ForEach-Object { Write-Host "$($_.Name) - Last Modified: $($_.LastWriteTime)" }
           Write-Host "Running pytest on slangpy tests..."
           $env:PYTHONPATH = "$SITE_PACKAGES"
           python -m pytest "$SITE_PACKAGES\slangpy\tests" -v