WORKFLOW: build PDF

.github/workflows/build.yml

@@ -25,3 +25,35 @@ jobs:
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         branch: gh-pages
+  build-pdf:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+    - name: check out code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
+    - name: install python3
+      run: |
+        sudo apt -y update
+        sudo apt -y install python3 python3-pip
+    - name: install python3 dependencies
+      run: |
+        python3 -m pip install -r requirements.txt
+    - name: install latex dependencies
+      run: |
+        sudo apt install -y latexmk texlive texlive-fonts-extra
+    - name: build PDF
+      run: make latexpdf
+    - name: do some trick ;-)
+      run: |
+          mv _build/latex/matematyka.pdf ..
+          git rm -rf *
+          mv ../matematyka.pdf .
+          git add .
+          git commit --amend --no-edit
+    - name: Push changes
+      uses: ad-m/github-push-action@master
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        branch: pdf