pdm install with cpu torch

.github/workflows/ci-pdm-install-and-test.yml

@@ -14,14 +14,19 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Install pdm
-        uses: pdm-project/setup-pdm@v4
-        with:
-          python-version: "3.10"
-          cache: true
+        run: |
+          python -m pip install pdm
+
+      - name: Create venv
+        run: |
+          pdm venv create --with-pip
+          pdm use --venv in-project
 
       - name: Install torch (CPU)
         run: |
           python -m pip install torch  --index-url https://download.pytorch.org/whl/cpu
+          # check that the CPU version is installed
+          python -c "import torch; assert torch.__version__.endswith('+gpu')"
 
       - name: Install package (including dev dependencies)
         run: |

.gitignore

@@ -76,3 +76,5 @@ tags
 
 # pdm (https://pdm-project.org/en/stable/)
 .pdm-python
+# exclude pdm.lock file so that both cpu and gpu versions of torch will be accepted by pdm
+pdm.lock