Fix PennyLane LightningKokkos and LightningQubits tests for stable/stable

.github/CHANGELOG.md

@@ -23,7 +23,7 @@
 
 * Lightning-Kokkos' functors are rewritten as functions wrapping around generic gate and generator functors templated over a coefficient interaction function. This reduces boilerplate while clarifying how the various kernels differ from one another.
   [(#640)](https://github.com/PennyLaneAI/pennylane-lightning/pull/640)
-  
+
 * Update C++ and Python GitHub actions names to include the matrix info.
   [(#717)](https://github.com/PennyLaneAI/pennylane-lightning/pull/717)
 
@@ -49,6 +49,9 @@
 * The `.github/workflows/tests_lkcpu_python.yml` workflow properly checks out the release or stable version of Lightning-Qubit during the test job.
   [(#723)](https://github.com/PennyLaneAI/pennylane-lightning/pull/723)
 
+* Fix PennyLane LightningKokkos and LightningQubit tests for stable/stable configuration;
+  [(#734)](https://github.com/PennyLaneAI/pennylane-lightning/pull/734)
+
 ### Contributors
 
 This release contains contributions from (in alphabetical order):

.github/workflows/build_and_cache_Kokkos_linux.yml

@@ -12,11 +12,15 @@ on:
       runs_on:
         description: |
           The runner that should run the jobs. If left blank, the value from inputs.os is used.
-          This is useful if you want the jobs to run in a specific runner group, while not using that group name as part 
+          This is useful if you want the jobs to run in a specific runner group, while not using that group name as part
           of the cache key.
         required: false
         type: string
         default: ''
+      kokkos_version:
+        required: false
+        type: string
+        default: 4.3.01
     outputs:
       exec_model:
         description: "The execution model for Kokkos."
@@ -37,7 +41,7 @@ jobs:
 
       - name: Kokkos version
         id: kokkos_version
-        run: echo "kokkos_version=[\"4.3.01\"]" >> $GITHUB_OUTPUT
+        run: echo "kokkos_version=[\"${{ inputs.kokkos_version }}\"]" >> $GITHUB_OUTPUT
 
     outputs:
       exec_model: ${{ steps.exec_model.outputs.exec_model }}

.github/workflows/tests_lgpu_python.yml

@@ -101,7 +101,7 @@ jobs:
         run: |
           cd main
           git fetch --tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
 
       - uses: actions/setup-python@v5
         name: Install Python

.github/workflows/tests_lgpumpi_cpp.yml

@@ -58,7 +58,7 @@ jobs:
         if: inputs.lightning-version == 'stable'
         run: |
           git fetch tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
       - uses: actions/setup-python@v5
         id: setup_python
         name: Install Python
@@ -191,4 +191,3 @@ jobs:
           rm -rf ${{ steps.setup_venv.outputs.venv_name }}
           rm -rf * .git .gitignore .github
           pip cache purge
-

.github/workflows/tests_lgpumpi_python.yml

@@ -67,7 +67,7 @@ jobs:
         if: inputs.lightning-version == 'stable'
         run: |
           git fetch --tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
 
 
       # Since the self-hosted runner can be re-used. It is best to set up all package

.github/workflows/tests_lkcpu_python.yml

@@ -48,6 +48,7 @@ jobs:
     uses: ./.github/workflows/build_and_cache_Kokkos_linux.yml
     with:
       os: ubuntu-22.04
+      kokkos_version: ${{ inputs.lightning-version == 'stable' && '4.2.00' || '4.3.01' }} #To be updated next Release.
 
   build_lightning_kokkos_wheels:
     needs: [determine_runner, build_and_cache_Kokkos]
@@ -80,7 +81,7 @@ jobs:
         run: |
           cd main
           git fetch --tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
           git log -1 --format='%H'
           git status
 
@@ -168,7 +169,7 @@ jobs:
           fetch-tags: true
           path: main
 
-      - name: Switch to release build of Lightning
+      - name: Switch to release tag of Lightning
         if: inputs.lightning-version == 'release'
         run: |
           cd main
@@ -180,6 +181,16 @@ jobs:
         run: |
           python -m pip install -U pennylane-lightning --no-deps
 
+      - name: Switch to stable tag of Lightning
+        if: inputs.lightning-version == 'stable'
+        run: |
+          cd main
+          git fetch --tags --force
+          git checkout latest_release
+          git log -1 --format='%H'
+          git status
+
+
       - uses: actions/download-artifact@v4
         with:
           name: ${{ matrix.pl_backend }}-${{ matrix.exec_model }}_name.txt
@@ -286,4 +297,4 @@ jobs:
         with:
           fail_ci_if_error: true
           verbose: true
-          token: ${{ secrets.CODECOV_TOKEN }}
+          token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/tests_lkcuda_python.yml

@@ -46,7 +46,7 @@ jobs:
       matrix:
         os: [ubuntu-22.04]
         exec_model: ["CUDA"]
-        kokkos_version: ["4.3.01"]
+        kokkos_version: ["${{ inputs.lightning-version == 'stable' && '4.2.00' || '4.3.01' }}"] #To be updated next Release.
 
     steps:
       - name: Validate GPU version and installed compiler
@@ -110,7 +110,7 @@ jobs:
         os: [ubuntu-22.04]
         pl_backend: ["lightning_kokkos", "all"]
         exec_model: ["CUDA"]
-        kokkos_version: ["4.3.01"]
+        kokkos_version: ["${{ inputs.lightning-version == 'stable' && '4.2.00' || '4.3.01' }}"] #To be updated next Release.
 
     name: Python Tests (${{ matrix.pl_backend }}, kokkos-${{ matrix.kokkos_version }}, model-${{ matrix.exec_model }})
     runs-on:
@@ -161,7 +161,7 @@ jobs:
         run: |
           cd main
           git fetch --tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
           git log -1 --format='%H'
           git status
 

.github/workflows/tests_lqcpu_python.yml

@@ -76,7 +76,7 @@ jobs:
         run: |
           cd main
           git fetch --tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
           git log -1 --format='%H'
           git status
 
@@ -158,7 +158,7 @@ jobs:
           mv ${{ github.workspace }}/wheel_${{ matrix.pl_backend }}-${{ matrix.blas }}.whl ${{ github.workspace }}/$WHEEL_NAME
           python -m pip install -r requirements-dev.txt
           python -m pip install openfermionpyscf
-          python -m pip install ${{ github.workspace }}/$WHEEL_NAME --no-deps
+          python -m pip install ${{ github.workspace }}/$WHEEL_NAME --no-deps --force-reinstall
 
       - name: Checkout PennyLane for release build
         if: inputs.pennylane-version == 'release'
@@ -179,14 +179,23 @@ jobs:
         if: inputs.pennylane-version == 'stable'
         run: |
           cd main
-          python -m pip uninstall -y pennylane && python -m pip install -U pennylane
+          python -m pip uninstall -y pennylane && python -m pip install -U pennylane --no-deps
 
       - name: Install ML libraries for interfaces
         run: |
           python -m pip install --upgrade torch==$TORCH_VERSION -f https://download.pytorch.org/whl/cpu/torch_stable.html
           python -m pip install --upgrade "jax[cpu]"  # This also installs jaxlib
           python -m pip install --upgrade tensorflow~=$TF_VERSION keras~=$TF_VERSION
 
+      - name: Switch to stable tag of Lightning
+        if: inputs.lightning-version == 'stable'
+        run: |
+          cd main
+          git fetch --tags --force
+          git checkout latest_release
+          git log -1 --format='%H'
+          git status
+
       - name: Run PennyLane-Lightning unit tests
         run: |
           # TODO: Remove installing pytest-xdist with release v0.36.0

.github/workflows/tests_without_binary.yml

@@ -60,7 +60,7 @@ jobs:
         run: |
           cd main
           git fetch --tags --force
-          git checkout $(git tag | sort -V | tail -1)
+          git checkout latest_release
           git log -1 --format='%H'
           git status
 

pennylane_lightning/core/_version.py

@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.37.0-dev14"
+__version__ = "0.37.0-dev15"