Fix Windows wheels

.github/CHANGELOG.md

@@ -50,8 +50,14 @@
 * Introduce `ci:build_wheels` label, which controls wheel building on `pull_request` and other triggers.
   [(#648)](https://github.com/PennyLaneAI/pennylane-lightning/pull/648)
 
+* Remove building wheels for Lightning Kokkos on Windows.
+  [(#693)](https://github.com/PennyLaneAI/pennylane-lightning/pull/693)
+
 ### Improvements
 
+* Add tests for Windows Wheels, fix ill-defined caching, and set the proper backend for LKokkos wheels.
+  [(#693)](https://github.com/PennyLaneAI/pennylane-lightning/pull/693)
+
 * Replace string comparisons by `isinstance` checks where possible.
   [(#691)](https://github.com/PennyLaneAI/pennylane-lightning/pull/691)
 

.github/workflows/wheel_win_x86_64.yml

@@ -39,7 +39,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [windows-2022]
-        exec_model: [\"SERIAL\"]
+        exec_model: ["SERIAL"]
         kokkos_version: ${{ fromJson(needs.set_wheel_build_matrix.outputs.kokkos_version) }}
     timeout-minutes: 30
     name: Kokkos core (${{ matrix.exec_model }})
@@ -59,12 +59,6 @@ jobs:
           cd D:\a
           git clone --branch ${{ matrix.kokkos_version }} https://github.com/kokkos/kokkos.git
 
-      - name: Create installation directory
-        if: steps.kokkos-cache.outputs.cache-hit != 'true'
-        run: |
-          Remove-Item -Path D:\a\install_dir\${{ matrix.exec_model }} -Recurse -Force -ErrorAction Ignore
-          mkdir -p D:\a\install_dir\${{ matrix.exec_model }}
-
       - name: Install dependencies
         if: steps.kokkos-cache.outputs.cache-hit != 'true'
         run: |
@@ -73,6 +67,7 @@ jobs:
       - name: Build Kokkos core library
         if: steps.kokkos-cache.outputs.cache-hit != 'true'
         run: |
+          mkdir -p D:\a\install_dir\${{ matrix.exec_model }}
           cd D:\a\kokkos
           cmake -BBuild . -DCMAKE_INSTALL_PREFIX=D:\a\install_dir\${{ matrix.exec_model }} `
                           -DKokkos_ENABLE_COMPLEX_ALIGN=OFF `
@@ -87,15 +82,15 @@ jobs:
           cmake --install ./Build --config RelWithDebInfo --verbose
 
   win-wheels:
-    needs: [set_wheel_build_matrix]
+    needs: [set_wheel_build_matrix, build_dependencies]
     strategy:
       fail-fast: false
       matrix:
         os: [windows-2022]
         arch: [AMD64]
-        pl_backend: ["lightning_kokkos", "lightning_qubit"]
+        pl_backend: ["lightning_qubit"]
         cibw_build: ${{ fromJson(needs.set_wheel_build_matrix.outputs.python_version) }}
-        exec_model: [\"SERIAL\"]
+        exec_model: ["SERIAL"]
         kokkos_version: ${{ fromJson(needs.set_wheel_build_matrix.outputs.kokkos_version) }}
     timeout-minutes: 30
     name: ${{ matrix.os }} - ${{ matrix.pl_backend }} (Python ${{ fromJson('{ "cp39-*":"3.9","cp310-*":"3.10","cp311-*":"3.11","cp312-*":"3.12" }')[matrix.cibw_build] }})
@@ -112,11 +107,11 @@ jobs:
       - name: Checkout PennyLane-Lightning
         uses: actions/checkout@v4
 
-      - name: Copy cached libraries #Update when merging to pennylane-lightning
+      - name: Copy cached libraries
         if: steps.kokkos-cache.outputs.cache-hit == 'true'
         run: |
           Copy-Item -Path "D:\a\install_dir\${{ matrix.exec_model }}\" `
-                    -Destination "D:\a\Lightning-Unification\Lightning-Unification\Kokkos" -Recurse -Force
+                    -Destination "D:\a\pennylane-lightning\pennylane-lightning\Kokkos" -Recurse -Force
 
       - name: Install cibuildwheel
         run: python -m pip install cibuildwheel~=2.16.0 wheel
@@ -131,12 +126,8 @@ jobs:
           CIBW_BEFORE_BUILD: |
             python -m pip install pybind11 cmake~=3.24.0 build
 
-          #Temporarily commenting while solving problems to find binaries in CIBW tests.
-          # CIBW_BEFORE_TEST: |
-          #   python -m pip install -r requirements-tests.txt
-
-          # CIBW_TEST_COMMAND: |
-          #   pl-device-test --device=lightning.qubit --skip-ops -x --tb=short --no-flaky-report
+          CIBW_ENVIRONMENT: |
+            PL_BACKEND="${{ matrix.pl_backend }}"
 
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
 
@@ -164,6 +155,36 @@ jobs:
           }
           cd ..
 
+      - name: Determine Python version
+        id: pyvs
+        shell: bash
+        run: |
+          echo "version=$(echo  ${{ matrix.cibw_build }} | tr -cd '[:digit:].' | sed 's/./&./1')" >> $GITHUB_OUTPUT
+
+      - uses: actions/setup-python@v5
+        name: Install Python
+        with:
+          python-version: ${{ steps.pyvs.outputs.version }}
+
+      - name: Test wheels
+        run: |
+          python -m ensurepip --upgrade
+          python -m pip install setuptools
+          python -m pip install -r requirements-tests.txt
+          if ('${{ matrix.pl_backend }}' -eq 'lightning_kokkos'){
+            $SKIP_COMPILATION=true
+            $PL_BACKEND="lightning_qubit"
+            python -m pip install -e . -vv
+          }
+          cd wheelhouse
+          $wheels = Get-ChildItem "./" -Filter *.whl
+          foreach ($i in $wheels){
+            python -m pip install $i.Name
+          }
+          cd ..
+          $DEVICENAME=(echo ${{ matrix.pl_backend }} | %{$_ -replace "_","."})
+          pl-device-test --device=$DEVICENAME --skip-ops -x --tb=short --no-flaky-report
+
       - name: Validate wheels
         run: |
           python -m pip install twine
@@ -207,4 +228,4 @@ jobs:
         with:
           user: __token__
           password: ${{ secrets.TEST_PYPI_API_TOKEN }}
-          repository-url: https://test.pypi.org/legacy/
+          repository-url: https://test.pypi.org/legacy/

pennylane_lightning/core/_version.py

@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.36.0-dev35"
+__version__ = "0.36.0-dev36"