Add pre-commit (#74)

Add `pre-commit` to the repo, replacing the existing manual use of
`ruff` and `mypy` in github actions. This is more in line with what
happens in both `ipython` and `matplotlib`. I have kept `zizmor` as a
separate github action.

Author: ianthomas23

.github/workflows/main.yml

@@ -18,6 +18,7 @@ concurrency:
 
 jobs:
   run:
+    name: Build and test
     runs-on: ${{ matrix.os }}
     timeout-minutes: 3
 
@@ -52,32 +53,8 @@ jobs:
     - name: Test installation without nbdime
       run: pytest -v
 
-    - name: Test flake8
-      if: ${{ matrix.python-version == '3.14' }}
-      run: flake8 matplotlib_inline --ignore=E501,W504,W503
-
     - name: Test Build
       if: ${{ matrix.python-version == '3.14' }}
       run: |
         pip install build
         python -m build
-
-    - name: Install ruff
-      if: ${{ matrix.python-version == '3.14' }}
-      run: pip install ruff
-
-    - name: Check code with ruff
-      if: ${{ matrix.python-version == '3.14' }}
-      run: ruff check matplotlib_inline
-
-    - name: Check formatting with ruff
-      if: ${{ matrix.python-version == '3.14' }}
-      run: ruff format matplotlib_inline --check
-
-    - name: install Mypy
-      if: ${{ matrix.python-version == '3.14' }}
-      run : pip install mypy matplotlib
-
-    - name: run mypy
-      if: ${{ matrix.python-version == '3.14' }}
-      run: mypy .

.github/workflows/publish.yml

@@ -44,4 +44,3 @@ jobs:
         fi
     - name: Publish package
       uses: pypa/gh-action-pypi-publish@7245906fb61fa33a13554f9d5fb856fe61758086 # v1.14.3
-

.pre-commit-config.yaml

@@ -0,0 +1,25 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v6.0.0
+    hooks:
+      - id: check-added-large-files
+      - id: check-merge-conflict
+      - id: check-toml
+      - id: check-yaml
+      - id: debug-statements
+      - id: end-of-file-fixer
+        exclude: \.ipynb$
+      - id: trailing-whitespace
+        exclude: \.ipynb$
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.17.3
+    hooks:
+      - id: ruff-check
+        exclude: \.ipynb$
+      - id: ruff-format
+        exclude: \.ipynb$
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v2.4.0
+    hooks:
+      - id: mypy
+        additional_dependencies: [matplotlib, traitlets]

pyproject.toml

@@ -49,7 +49,6 @@ inline = "matplotlib_inline.backend_inline"
 
 [project.optional-dependencies]
 test = [
-    "flake8",
     "nbdime",
     "nbval",
     "notebook",