Add nox and github action for code formatting & type checking

.github/workflows/format.yml

@@ -0,0 +1,34 @@
+name: Format & Type Check
+
+on: [push, pull_request]
+
+jobs:
+  formatting:
+    runs-on: ubuntu-latest
+    name: "Check code style"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Run ruff via nox
+        run: |
+          python -m pip install nox
+          python -m nox -s format
+
+  pyright:
+    runs-on: ubuntu-latest
+    name: "Type checking"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+
+      - name: Run pyright via nox
+        run: |
+          python -m pip install nox
+          python -m nox -s pyright

noxfile.py

@@ -0,0 +1,29 @@
+import os
+
+import nox
+from nox import options
+
+PROJECT_PATH = os.path.join(".", "src")
+SCRIPT_PATHS = [PROJECT_PATH, "noxfile.py"]
+
+options.sessions = ["format_fix", "pyright"]
+
+
+@nox.session()
+def format_fix(session: nox.Session) -> None:
+    session.install("-r", "requirements_dev.txt")
+    session.run("python", "-m", "ruff", "format", *SCRIPT_PATHS)
+    session.run("python", "-m", "ruff", "check", *SCRIPT_PATHS, "--fix")
+
+
+@nox.session()
+def format_check(session: nox.Session) -> None:
+    session.install("-r", "requirements_dev.txt")
+    session.run("python", "-m", "ruff", "format", *SCRIPT_PATHS, "--check")
+    session.run("python", "-m", "ruff", "check", *SCRIPT_PATHS)
+
+
+@nox.session()
+def pyright(session: nox.Session) -> None:
+    session.install("-r", "requirements_dev.txt", "-r", "requirements.txt")
+    session.run("pyright", *SCRIPT_PATHS)

requirements_dev.txt

@@ -1,2 +1,5 @@
-ruff==0.7.3
+nox==2024.10.9
+ruff==0.9.1
 pre-commit==4.0.1
+pyright==1.1.391
+

src/extensions/fortune.py

@@ -9,7 +9,7 @@
 @arc.slash_command("fortune", "Send a user a random Fortune!")
 async def fortune_command(
     ctx: arc.GatewayContext,
-    user: arc.Option[hikari.User, arc.UserParams("A user")] = None,
+    user: arc.Option[hikari.User | None, arc.UserParams("A user")] = None,
 ) -> None:
     """Send a random Fortune!"""