docs: rework CI a bit

Author: henryiii

.github/workflows/ci.yml

@@ -704,14 +704,11 @@ jobs:
     - name: Install Doxygen
       run: sudo apt-get install -y doxygen librsvg2-bin # Changed to rsvg-convert in 20.04
 
-    - name: Install docs & setup requirements
-      run: python3 -m pip install -r docs/requirements.txt
-
     - name: Build docs
-      run: python3 -m sphinx -W -b html docs docs/.build
+      run: pipx run nox -s docs
 
     - name: Make SDist
-      run: python3 setup.py sdist
+      run: pipx run nox -s build
 
     - run: git status --ignored
 

noxfile.py

@@ -57,10 +57,10 @@ def docs(session: nox.Session) -> None:
     session.chdir("docs")
 
     if "pdf" in session.posargs:
-        session.run("sphinx-build", "-M", "latexpdf", ".", "_build")
+        session.run("sphinx-build", "-b", "latexpdf", ".", "_build")
         return
 
-    session.run("sphinx-build", "-M", "html", ".", "_build")
+    session.run("sphinx-build", "-b", "html", ".", "_build")
 
     if "serve" in session.posargs:
         session.log("Launching docs at http://localhost:8000/ - use Ctrl-C to quit")