Use problemtools/githubci image in workflow. Run verifyproblem on all examples.

Author: gkreitz

.github/workflows/python-app.yml

@@ -18,6 +18,8 @@ jobs:
     strategy:
       matrix:
         python-version: ["pypy3.11", "3.11"] # 3.11 is the lowest we support, since we want StrEnum
+    container:
+      image: problemtools/githubci:latest
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
@@ -29,8 +31,6 @@ jobs:
         python -m pip install --upgrade pip
         pip install mypy ruff pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
-        sudo apt-get update
-        sudo apt-get install pandoc tidy ghostscript python3 texlive-fonts-recommended texlive-lang-cyrillic texlive-latex-extra texlive-plain-generic
     - name: Lint with ruff
       run: ruff check --output-format=github
     - name: Check ruff formatting
@@ -43,12 +43,16 @@ jobs:
 
   packages: # Use a separate job to test debian packaging to speed things up (no need to test this for every python version above)
     runs-on: ubuntu-latest
+    container:
+      image: problemtools/githubci:latest
     steps:
     - uses: actions/checkout@v4
-    - name: Install apt packages (for debbuild)
-      run: |
-        sudo apt-get update
-        sudo apt-get install debhelper dh-virtualenv dpkg-dev python3-venv automake g++ make libboost-regex-dev libgmp-dev python3 git build-essential
-      shell: bash
     - name: Build debian packages
       run:  make builddeb
+    - name: Install debian package
+      run:  gdebi -i ../kattis-problemtools_*.deb
+    - name: Verify examples
+      run: |
+        shopt -s extglob
+        verifyproblem examples/!(README.md)
+-     shell: bash