Drop flake8 in favor of Ruff (home-assistant#89863)

.devcontainer/devcontainer.json

@@ -20,7 +20,6 @@
     "python.linting.enabled": true,
     "python.linting.pylintEnabled": true,
     "python.formatting.blackPath": "/usr/local/bin/black",
-    "python.linting.flake8Path": "/usr/local/bin/flake8",
     "python.linting.pycodestylePath": "/usr/local/bin/pycodestyle",
     "python.linting.pydocstylePath": "/usr/local/bin/pydocstyle",
     "python.linting.mypyPath": "/usr/local/bin/mypy",

.github/workflows/ci.yaml

@@ -286,55 +286,6 @@ jobs:
           shopt -s globstar
           pre-commit run --hook-stage manual black --files {homeassistant,tests}/components/${{ needs.info.outputs.integrations_glob }}/{*,**/*} --show-diff-on-failure
 
-  lint-flake8:
-    name: Check flake8
-    runs-on: ubuntu-22.04
-    needs:
-      - info
-      - pre-commit
-    steps:
-      - name: Check out code from GitHub
-        uses: actions/[email protected]
-      - name: Set up Python ${{ env.DEFAULT_PYTHON }}
-        uses: actions/[email protected]
-        id: python
-        with:
-          python-version: ${{ env.DEFAULT_PYTHON }}
-          check-latest: true
-      - name: Restore base Python virtual environment
-        id: cache-venv
-        uses: actions/cache/[email protected]
-        with:
-          path: venv
-          fail-on-cache-miss: true
-          key: >-
-            ${{ runner.os }}-${{ steps.python.outputs.python-version }}-venv-${{
-              needs.info.outputs.pre-commit_cache_key }}
-      - name: Restore pre-commit environment from cache
-        id: cache-precommit
-        uses: actions/cache/[email protected]
-        with:
-          path: ${{ env.PRE_COMMIT_CACHE }}
-          fail-on-cache-miss: true
-          key: >-
-            ${{ runner.os }}-${{ steps.python.outputs.python-version }}-${{
-              needs.info.outputs.pre-commit_cache_key }}
-      - name: Register flake8 problem matcher
-        run: |
-          echo "::add-matcher::.github/workflows/matchers/flake8.json"
-      - name: Run flake8 (fully)
-        if: needs.info.outputs.test_full_suite == 'true'
-        run: |
-          . venv/bin/activate
-          pre-commit run --hook-stage manual flake8 --all-files
-      - name: Run flake8 (partially)
-        if: needs.info.outputs.test_full_suite == 'false'
-        shell: bash
-        run: |
-          . venv/bin/activate
-          shopt -s globstar
-          pre-commit run --hook-stage manual flake8 --files {homeassistant,tests}/components/${{ needs.info.outputs.integrations_glob }}/{*,**/*}
-
   lint-ruff:
     name: Check ruff
     runs-on: ubuntu-22.04

.pre-commit-config.yaml

@@ -36,20 +36,6 @@ repos:
           - --quiet-level=2
         exclude_types: [csv, json]
         exclude: ^tests/fixtures/|homeassistant/generated/
-  - repo: https://github.com/PyCQA/flake8
-    rev: 6.0.0
-    hooks:
-      - id: flake8
-        additional_dependencies:
-          - pycodestyle==2.10.0
-          - pyflakes==3.0.1
-          - flake8-docstrings==1.6.0
-          - pydocstyle==6.2.3
-          - flake8-comprehensions==3.10.1
-          - flake8-noqa==1.3.0
-          - mccabe==0.7.0
-        exclude: docs/source/conf.py
-        stages: [manual]
   - repo: https://github.com/PyCQA/bandit
     rev: 1.7.4
     hooks:

.vscode/tasks.json

@@ -42,20 +42,6 @@
       },
       "problemMatcher": []
     },
-    {
-      "label": "Flake8",
-      "type": "shell",
-      "command": "pre-commit run flake8 --all-files",
-      "group": {
-        "kind": "test",
-        "isDefault": true
-      },
-      "presentation": {
-        "reveal": "always",
-        "panel": "new"
-      },
-      "problemMatcher": []
-    },
     {
       "label": "Ruff",
       "type": "shell",

Dockerfile.dev

@@ -5,7 +5,6 @@ SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 # Uninstall pre-installed formatting and linting tools
 # They would conflict with our pinned versions
 RUN pipx uninstall black
-RUN pipx uninstall flake8
 RUN pipx uninstall pydocstyle
 RUN pipx uninstall pycodestyle
 RUN pipx uninstall mypy

homeassistant/components/light/__init__.py

@@ -405,7 +405,7 @@ def preprocess_data(data: dict[str, Any]) -> dict[str | vol.Optional, Any]:
         base["params"] = data
         return base
 
-    async def async_handle_light_on_service(
+    async def async_handle_light_on_service(  # noqa: C901
         light: LightEntity, call: ServiceCall
     ) -> None:
         """Handle turning a light on.

homeassistant/components/mqtt/discovery.py

@@ -99,7 +99,7 @@ async def async_start(  # noqa: C901
     mqtt_integrations = {}
 
     @callback
-    def async_discovery_message_received(msg: ReceiveMessage) -> None:
+    def async_discovery_message_received(msg: ReceiveMessage) -> None:  # noqa: C901
         """Process the received message."""
         mqtt_data.last_discovery = time.time()
         payload = msg.payload

pyproject.toml

@@ -292,15 +292,6 @@ keep-runtime-typing = true
 
 [tool.ruff.per-file-ignores]
 
-# TODO: these files have functions that are too complex, but flake8's and ruff's
-#       complexity (and/or nested-function) handling differs; trying to add a noqa doesn't work
-#       because the flake8-noqa plugin then disagrees on whether there should be a C901 noqa
-#       on that line.  So, for now, we just ignore C901s on these files as far as ruff is concerned.
-
-"homeassistant/components/light/__init__.py" = ["C901"]
-"homeassistant/components/mqtt/discovery.py" = ["C901"]
-"homeassistant/components/websocket_api/http.py" = ["C901"]
-
 # Allow for main entry & scripts to write to stdout
 "homeassistant/__main__.py" = ["T201"]
 "homeassistant/scripts/*" = ["T201"]

requirements_test_pre_commit.txt

@@ -4,15 +4,7 @@ autoflake==2.0.0
 bandit==1.7.4
 black==23.1.0
 codespell==2.2.2
-flake8-comprehensions==3.10.1
-flake8-docstrings==1.6.0
-flake8-noqa==1.3.0
-flake8==6.0.0
 isort==5.12.0
-mccabe==0.7.0
-pycodestyle==2.10.0
-pydocstyle==6.2.3
-pyflakes==3.0.1
 pyupgrade==3.3.1
 ruff==0.0.256
 yamllint==1.28.0

script/lint

@@ -12,10 +12,6 @@ if [ -z "$files" ] ; then
   exit
 fi
 printf "%s\n" $files
-echo "================"
-echo "LINT with flake8"
-echo "================"
-pre-commit run flake8 --files $files
 echo "=============="
 echo "LINT with ruff"
 echo "=============="

script/lint_and_test.py

@@ -116,9 +116,9 @@ async def pylint(files):
     return res
 
 
-async def _ruff_or_flake8(tool, files):
-    """Exec ruff or flake8."""
-    _, log = await async_exec("pre-commit", "run", tool, "--files", *files)
+async def ruff(files):
+    """Exec ruff."""
+    _, log = await async_exec("pre-commit", "run", "ruff", "--files", *files)
     res = []
     for line in log.splitlines():
         line = line.split(":")
@@ -129,23 +129,12 @@ async def _ruff_or_flake8(tool, files):
     return res
 
 
-async def flake8(files):
-    """Exec flake8."""
-    return await _ruff_or_flake8("flake8", files)
-
-
-async def ruff(files):
-    """Exec ruff."""
-    return await _ruff_or_flake8("ruff", files)
-
-
 async def lint(files):
     """Perform lint."""
     files = [file for file in files if os.path.isfile(file)]
     res = sorted(
         itertools.chain(
             *await asyncio.gather(
-                flake8(files),
                 pylint(files),
                 ruff(files),
             )

setup.cfg

@@ -3,32 +3,3 @@
 
 [metadata]
 url = https://www.home-assistant.io/
-
-[flake8]
-exclude = .venv,.git,docs,venv,bin,lib,deps,build
-max-complexity = 25
-doctests = True
-# To work with Black
-# E501: line too long
-# W503: Line break occurred before a binary operator
-# E203: Whitespace before ':'
-# D202 No blank lines allowed after function docstring
-# W504 line break after binary operator
-ignore =
-    E501,
-    W503,
-    E203,
-    D202,
-    W504
-noqa-require-code = True
-
-# Ignores, that are currently caused by mismatching configurations
-# between ruff and flake8 configurations. Once ruff becomes permanent flake8
-# will be removed, including these ignores below.
-# In case we decide not to continue with ruff, we should remove these
-# and probably need to clean up a couple of noqa comments.
-per-file-ignores =
-    homeassistant/config.py:NQA102
-    tests/components/august/mocks.py:NQA102
-    tests/components/tts/conftest.py:NQA102
-    tests/helpers/test_icon.py:NQA102