resolves CI drive out of space by prune caching and use CPU version of torch

Signed-off-by: jirka <[email protected]>

Author: Borda

.github/workflows/pythonapp.yml

@@ -33,16 +33,7 @@ jobs:
       uses: actions/setup-python@v6
       with:
         python-version: '3.9'
-    - name: cache weekly timestamp
-      id: pip-cache
-      run: |
-        echo "datew=$(date '+%Y-%V')" >> $GITHUB_OUTPUT
-    - name: cache for pip
-      uses: actions/cache@v4
-      id: cache
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ steps.pip-cache.outputs.datew }}
+        cache: 'pip'
     - name: Install dependencies
       run: |
         find  /opt/hostedtoolcache/* -maxdepth 0 ! -name 'Python' -exec rm -rf {} \;
@@ -75,22 +66,11 @@ jobs:
       uses: actions/setup-python@v6
       with:
         python-version: '3.9'
+        cache: 'pip'
     - name: Prepare pip wheel
       run: |
         which python
         python -m pip install --upgrade pip wheel
-    - name: cache weekly timestamp
-      id: pip-cache
-      run: |
-        echo "datew=$(date '+%Y-%V')" >> $GITHUB_OUTPUT
-        echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
-      shell: bash
-    - name: cache for pip
-      uses: actions/cache@v4
-      id: cache
-      with:
-        path: ${{ steps.pip-cache.outputs.dir }}
-        key: ${{ matrix.os }}-latest-pip-${{ steps.pip-cache.outputs.datew }}
     - if: runner.os == 'windows'
       name: Install torch cpu from pytorch.org (Windows only)
       run: |
@@ -136,26 +116,15 @@ jobs:
       uses: actions/setup-python@v6
       with:
         python-version: '3.9'
-    - name: cache weekly timestamp
-      id: pip-cache
-      run: |
-        echo "datew=$(date '+%Y-%V')" >> $GITHUB_OUTPUT
-    - name: cache for pip
-      uses: actions/cache@v4
-      id: cache
-      with:
-        path: |
-          ~/.cache/pip
-          ~/.cache/torch
-        key: ${{ runner.os }}-pip-${{ steps.pip-cache.outputs.datew }}
+        cache: 'pip'
     - name: Install dependencies
       run: |
         find  /opt/hostedtoolcache/* -maxdepth 0 ! -name 'Python' -exec rm -rf {} \;
         python -m pip install --user --upgrade pip setuptools wheel twine packaging
         # install the latest pytorch for testing
         # however, "pip install monai*.tar.gz" will build cpp/cuda with an isolated
         # fresh torch installation according to pyproject.toml
-        python -m pip install torch>=2.5.1 torchvision
+        python -m pip install torch>=2.5.1 torchvision --extra-index-url https://download.pytorch.org/whl/cpu
     - name: Check packages
       run: |
         pip uninstall monai
@@ -184,7 +153,7 @@ jobs:
       working-directory: ${{ steps.mktemp.outputs.tmp_dir }}
       run: |
         # install from wheel
-        python -m pip install monai*.whl
+        python -m pip install monai*.whl --extra-index-url https://download.pytorch.org/whl/cpu
         python -c 'import monai; monai.config.print_config()' 2>&1 | grep -iv "unknown"
         python -c 'import monai; print(monai.__file__)'
         python -m pip uninstall -y monai
@@ -195,7 +164,7 @@ jobs:
         # install from tar.gz
         name=$(ls *.tar.gz | head -n1)
         echo $name
-        python -m pip install $name[all]
+        python -m pip install $name[all] --extra-index-url https://download.pytorch.org/whl/cpu
         python -c 'import monai; monai.config.print_config()' 2>&1 | grep -iv "unknown"
         python -c 'import monai; print(monai.__file__)'
     - name: Quick test
@@ -205,7 +174,7 @@ jobs:
         cp ${{ steps.root.outputs.pwd }}/requirements*.txt .
         cp -r ${{ steps.root.outputs.pwd }}/tests .
         ls -al
-        python -m pip install -r requirements-dev.txt
+        python -m pip install -r requirements-dev.txt --extra-index-url https://download.pytorch.org/whl/cpu
         python -m unittest -v
       env:
         PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION: python  # https://github.com/Project-MONAI/MONAI/issues/4354
@@ -218,22 +187,11 @@ jobs:
       uses: actions/setup-python@v6
       with:
         python-version: '3.9'
-    - name: cache weekly timestamp
-      id: pip-cache
-      run: |
-        echo "datew=$(date '+%Y-%V')" >> $GITHUB_OUTPUT
-    - name: cache for pip
-      uses: actions/cache@v4
-      id: cache
-      with:
-        path: |
-          ~/.cache/pip
-          ~/.cache/torch
-        key: ${{ runner.os }}-pip-${{ steps.pip-cache.outputs.datew }}
+        cache: 'pip'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip wheel
-        python -m pip install -r docs/requirements.txt
+        python -m pip install -r docs/requirements.txt --extra-index-url https://download.pytorch.org/whl/cpu
     - name: Make html
       run: |
         cd docs/