simplify sphinx build script

.github/workflows/sphinx.yml

@@ -5,30 +5,27 @@ on:
     branches:
       - main
 
-
 jobs:
   build:
     runs-on: ubuntu-latest
-    env:
-      PMIP_CBC_LIBRARY: "/home/runner/build/dist/lib/libCbc.so"
     steps:
       - uses: actions/checkout@v4
-      # - name: Compile CBC binary
-      #   run : |
-      #     sudo apt-get install gcc g++ gfortran libgfortran-9-dev liblapack-dev libamd2 libcholmod3 libmetis-dev libsuitesparse-dev libnauty2-dev git
-      #     mkdir -p ~/build
-      #     cd ~/build
-      #     wget -nH https://raw.githubusercontent.com/coin-or/coinbrew/master/coinbrew
-      #     bash coinbrew fetch Cbc@master --no-prompt --skip-update
-      #     bash coinbrew build Cbc@stable/2.10 --no-prompt --tests=none
       - name: Install Python 3
         uses: actions/setup-python@v5
         with:
           python-version: '3.9.x'
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install build
+          pip install .[docs,test]
+      - name: Build package
+        run: python -m build
       - name: Build HTML
-        uses: ammaraskar/sphinx-action@master
-        with: 
-          pre-build-command: "apt-get update -y --allow-releaseinfo-change && apt-get install -y git pandoc latexmk texlive-latex-recommended texlive-latex-extra dvipng texlive-fonts-recommended && pip install sphinx==7.1.2"
+        run: |
+          apt-get update -y --allow-releaseinfo-change && apt-get install -y git pandoc latexmk texlive-latex-recommended texlive-latex-extra dvipng texlive-fonts-recommended
+          cd docs
+          make html
       - name: Upload artifacts
         uses: actions/upload-artifact@v1
         with:
@@ -39,4 +36,4 @@ jobs:
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: docs/_build/html
+          publish_dir: docs/_build/html