Use pre-commit in tox

requirements/static.in

@@ -1,5 +1 @@
-flake8
-nbstripout
-toml
-tox
-yapf
+pre-commit

requirements/static.txt

@@ -1,70 +1,27 @@
-# SHA1:1ae14843fff4b22dd16da520170445443705c399
 #
-# This file is autogenerated by pip-compile-multi
+# This file is autogenerated by pip-compile with python 3.8
 # To update, run:
 #
-#    pip-compile-multi
+#    pip-compile requirements/static.in
 #
-attrs==22.2.0
-    # via jsonschema
-cachetools==5.2.0
-    # via tox
-chardet==5.1.0
-    # via tox
-colorama==0.4.6
-    # via tox
+cfgv==3.3.1
+    # via pre-commit
 distlib==0.3.6
     # via virtualenv
-fastjsonschema==2.16.2
-    # via nbformat
 filelock==3.9.0
-    # via
-    #   tox
-    #   virtualenv
-flake8==6.0.0
-    # via -r requirements/static.in
-jsonschema==4.17.3
-    # via nbformat
-jupyter-core==5.1.2
-    # via nbformat
-mccabe==0.7.0
-    # via flake8
-nbformat==5.7.1
-    # via nbstripout
-nbstripout==0.6.1
-    # via -r requirements/static.in
-packaging==22.0
-    # via
-    #   pyproject-api
-    #   tox
+    # via virtualenv
+identify==2.5.13
+    # via pre-commit
+nodeenv==1.7.0
+    # via pre-commit
 platformdirs==2.6.2
-    # via
-    #   jupyter-core
-    #   tox
-    #   virtualenv
-pluggy==1.0.0
-    # via tox
-pycodestyle==2.10.0
-    # via flake8
-pyflakes==3.0.1
-    # via flake8
-pyproject-api==1.2.1
-    # via tox
-pyrsistent==0.19.3
-    # via jsonschema
-toml==0.10.2
-    # via -r requirements/static.in
-tomli==2.0.1
-    # via
-    #   pyproject-api
-    #   tox
-tox==4.1.3
+    # via virtualenv
+pre-commit==2.21.0
     # via -r requirements/static.in
-traitlets==5.8.0
-    # via
-    #   jupyter-core
-    #   nbformat
+pyyaml==6.0
+    # via pre-commit
 virtualenv==20.17.1
-    # via tox
-yapf==0.32.0
-    # via -r requirements/static.in
+    # via pre-commit
+
+# The following packages are considered to be unsafe in a requirements file:
+# setuptools

tox.ini

@@ -11,8 +11,8 @@ description = Code formatting and static analysis
 basepython = python3.8
 skip_install = true
 deps = -r requirements/static.txt
-allowlist_externals = find
-commands =
-  nbstripout --extra-keys 'metadata.language_info.version cell.metadata.jp-MarkdownHeadingCollapsed' --drop-empty-cells .
-  yapf --recursive --in-place src tests
-  flake8 .
+allowlist_externals = sh
+# The first run of pre-commit may reformat files. If this happens, it returns 1 but this
+# should not fail the job. So just run again if it fails. A second failure means that
+# either the different formatters can't agree on a format or that static analysis failed.
+commands = sh -c 'pre-commit run -a || (echo "" && pre-commit run -a)'