Add temporary hacks for debian13 and python < 3.10 when testing

 - a special flag is required to install pip packages under debian13
 - conda : python 3.8 must be pinned to avoid installation conflicts
 - conda : the alternative khiops-dev channel must be given for python 3.9 otherwise the installation of khiops-python dependencies fails

Author: Thierry RAMORASOAVINA

.github/workflows/pip.yml

@@ -89,13 +89,21 @@ jobs:
         with:
           name: pip-package
       - name: Install package
+        shell: bash
         run: |
           # Allow Pip to write to its cache
           mkdir -p /github/home/.cache/pip
           chown -R $(whoami) /github/home/.cache/pip
           # Install the Khiops Python library
-          pip install --upgrade pip
-          pip install $(ls khiops*.tar.gz)
+
+          # Hack for pip under debian, the alternatives are using venv or pipx
+          if [[ "${{ matrix.container }}" == "debian13" ]]; then
+            BREAK_SYSTEM_PACKAGES_FLAG="--break-system-packages"
+          else
+            # Under debian, the uninstallation of the previous version will fail
+            pip install --upgrade pip
+          fi          
+          pip install ${BREAK_SYSTEM_PACKAGES_FLAG} $(ls khiops*.tar.gz)
       - name: Run tests
         env:
           KHIOPS_SAMPLES_DIR: ${{ github.workspace }}/khiops-samples

.github/workflows/tests.yml

@@ -92,6 +92,7 @@ jobs:
           done
       - name: Install khiops-python dependencies
         if: success() || failure()
+        shell: bash
         run: |
           # The following git command is required,
           # as the Git repository is in a directory the current user does not own,
@@ -109,7 +110,15 @@ jobs:
             # Add homogeneous TOML support (Python >= 3.12 has standard tomllib)
             $CONDA install -y -n "$CONDA_ENV" tomli
             $CONDA run --no-capture-output -n "$CONDA_ENV" python scripts/extract_dependencies_from_pyproject_toml.py -f "pyproject.toml" > requires.txt
-            $CONDA install -y -n "$CONDA_ENV" `cat requires.txt`
+            if [[ "${{ matrix.python-version }}" == "3.8" ]]; then
+              # for python3.8 a pinned version of python is required to avoid installation conflicts
+              $CONDA install -y -n "$CONDA_ENV" `cat requires.txt` python=${{ matrix.python-version }} python_abi=${{ matrix.python-version }}
+            elif [[ "${{ matrix.python-version }}" == "3.9" ]]; then
+              # for python3.9 only, conda "forgets" the specific dev channel used for khiops-core 
+              $CONDA install -c https://anaconda.org/khiops-dev -y -n "$CONDA_ENV" `cat requires.txt`
+            else
+              $CONDA install -y -n "$CONDA_ENV" `cat requires.txt`              
+            fi
             rm -f requires.txt
           done
       - name: Configure Expensive Tests Setting
@@ -356,20 +365,26 @@ jobs:
           ref: ${{ env.SAMPLES_REVISION }}
           token: ${{ secrets.GITHUB_TOKEN }}
           path: khiops-samples
+      - name: Hack for pip under debian13
+        if: matrix.container == 'debian13'
+        run: |
+          # Hack for pip under debian, the alternatives are using venv or pipx
+          BREAK_SYSTEM_PACKAGES_FLAG="--break-system-packages"
+          echo "BREAK_SYSTEM_PACKAGES_FLAG=${BREAK_SYSTEM_PACKAGES_FLAG}" >> $GITHUB_ENV
       - name: Install khiops-python dev dependencies
         run: |
           # The following git command is required,
           # as the Git repository is in a directory the current user does not own,
           # Python versioneer fails to compute the current version correctly otherwise
           git config --global --add safe.directory $(realpath .)
           # Install tomli for Python < 3.11
-          pip install --user tomli
+          pip install ${BREAK_SYSTEM_PACKAGES_FLAG} tomli
           python scripts/extract_dependencies_from_pyproject_toml.py -f "pyproject.toml" > requires.txt
-          pip install --user `cat requires.txt`
+          pip install ${BREAK_SYSTEM_PACKAGES_FLAG} `cat requires.txt`
           rm -f requires.txt
       - name: Setup and Install Test Requirements
         run: |
-          pip install -r test-requirements.txt
+          pip install ${BREAK_SYSTEM_PACKAGES_FLAG} -r test-requirements.txt
       - name: Test Khiops Integration
         env:
           # Force > 2 CPU cores to launch mpiexec