[workflows/ci.yml] Build 3.12 with pyenv

.github/workflows/ci.yml

@@ -124,7 +124,7 @@ jobs:
     #-------- Python 3 -----
     - name: Set up supported Python ${{ matrix.python-version }}
       id: setup-python
-      if: ${{ matrix.python-impl == 'cpython' && matrix.python-version != '2.6' && matrix.python-version != '2.7'}}
+      if: ${{ matrix.python-impl == 'cpython' && matrix.python-version != '2.6' && matrix.python-version != '2.7' && matrix.python-version != '3.12'}}
       # wrap broken actions/setup-python@v4
       uses: ytdl-org/setup-python@v1
       with:
@@ -162,6 +162,42 @@ jobs:
             'import sys' \
             'print(sys.path)' \
             | ${expected} -
+    #-------- Python 3.12 -
+    - name: Set up Python 3.12 environment
+      if: ${{ matrix.python-version == '3.12' }}
+      shell: bash
+      run: |
+        PYENV_ROOT=$HOME/.local/share/pyenv
+        echo "PYENV_ROOT=${PYENV_ROOT}" >> "$GITHUB_ENV"
+    - name: Cache Python 3.12
+      id: cache312
+      if: ${{ matrix.python-version == '3.12' }}
+      uses: actions/cache@v3
+      with:
+        key: python-3.12
+        path: |
+          ${{ env.PYENV_ROOT }}
+    - name: Build and set up Python 3.12
+      if: ${{ matrix.python-version == '3.12' && ! steps.cache312.outputs.cache-hit }}
+      # dl and build locally
+      shell: bash
+      run: |
+        # Install build environment
+        sudo apt-get install -y build-essential llvm libssl-dev tk-dev  \
+                      libncursesw5-dev libreadline-dev libsqlite3-dev   \
+                      libffi-dev xz-utils zlib1g-dev libbz2-dev liblzma-dev
+        # Download PyEnv from its GitHub repository.
+        export PYENV_ROOT=${{ env.PYENV_ROOT }}
+        export PATH=$PYENV_ROOT/bin:$PATH
+        git clone "https://github.com/pyenv/pyenv.git" "$PYENV_ROOT"
+        pyenv install 3.12.0b4
+    - name: Locate Python 3.12
+      if: ${{ matrix.python-version == '3.12' }}
+      shell: bash
+      run: |
+        PYTHONHOME="${{ env.PYENV_ROOT }}/versions/3.12.0b4"
+        echo "PYTHONHOME=$PYTHONHOME" >> "$GITHUB_ENV"
+        echo "PATH=${PYTHONHOME}/bin:$PATH" >> "$GITHUB_ENV"
     #-------- Python 2.7 --
     - name: Set up Python 2.7
       if: ${{ matrix.python-version == '2.7' }}
@@ -325,7 +361,7 @@ jobs:
         done
     #-------- nose --------
     - name: Install nose for Python ${{ matrix.python-version }}
-      if: ${{ (matrix.python-version != '3.2' && steps.setup-python.outputs.python-path) || matrix.python-version == '2.7' }}
+      if: ${{ (matrix.python-version != '3.2' && steps.setup-python.outputs.python-path) || matrix.python-version == '2.7' || matrix.python-version == '3.12' }}
       shell: bash
       run: |
         echo "$PATH"