Add linting and CI workflow

.github/dependabot.yml

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+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10
+  - package-ecosystem: "pip"
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10

.github/release-drafter.yml

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+change-template: "- #$NUMBER - $TITLE (@$AUTHOR)"
+categories:
+  - title: "⚠ Breaking Changes"
+    labels:
+      - "breaking change"
+template: |
+  ## What’s Changed
+
+  $CHANGES

.github/workflows/release-drafter.yml

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+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  update_release_draft:
+    runs-on: ubuntu-latest
+    steps:
+      # Drafts your next Release notes as Pull Requests are merged into "main"
+      - uses: release-drafter/release-drafter@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

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+# This workflow will install Python dependencies, run tests and lint
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version:
+          - "3.9"
+          - "3.10"
+
+    steps:
+      - uses: actions/checkout@v2.3.4
+        with:
+          fetch-depth: 2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2.3.1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements_lint.txt
+      - name: Lint
+        run: pre-commit run

.gitignore

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+# Hide sublime text stuff
+*.sublime-project
+*.sublime-workspace
+
+# Hide some OS X stuff
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+
+# Thumbnails
+._*
+
+# IntelliJ IDEA
+.idea
+*.iml
+
+# pytest
+.pytest_cache
+.cache
+
+# GITHUB Proposed Python stuff:
+*.py[cod]
+
+# C extensions
+*.so
+
+# Packages
+*.egg
+*.egg-info
+dist
+build
+eggs
+.eggs
+parts
+bin
+var
+sdist
+develop-eggs
+.installed.cfg
+lib
+lib64
+pip-wheel-metadata
+
+# Logs
+*.log
+pip-log.txt
+
+# Unit test / coverage reports
+.coverage
+.tox
+coverage.xml
+nosetests.xml
+htmlcov/
+test-reports/
+test-results.xml
+test-output.xml
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+.python-version
+
+# emacs auto backups
+*~
+*#
+*.orig
+
+# venv stuff
+pyvenv.cfg
+pip-selfcheck.json
+venv
+.venv
+Pipfile*
+share/*
+Scripts/
+
+# vimmy stuff
+*.swp
+*.swo
+tags
+ctags.tmp
+
+# vagrant stuff
+virtualization/vagrant/setup_done
+virtualization/vagrant/.vagrant
+virtualization/vagrant/config
+
+# Visual Studio Code
+.vscode/*
+!.vscode/cSpell.json
+!.vscode/extensions.json
+!.vscode/tasks.json
+
+# Typing
+.mypy_cache

.pre-commit-config.yaml

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+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.1.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-docstring-first
+    -   id: check-yaml
+    -   id: debug-statements
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 4.0.1
+    hooks:
+    -   id: flake8
+        args:
+          - --max-line-length=500
+          - --ignore=E203,E266,E501,W503
+          - --max-complexity=18
+          - --select=B,C,E,F,W,T4,B9
+-   repo: https://github.com/ambv/black
+    rev: 21.12b0
+    hooks:
+    - id: black
+      language_version: python3
+-   repo: https://github.com/asottile/pyupgrade
+    rev: v2.31.0
+    hooks:
+    -   id: pyupgrade
+        args: ['--py39-plus']
+-   repo: https://github.com/pre-commit/mirrors-isort
+    rev: v5.10.1
+    hooks:
+    -   id: isort
+        args:
+          - --multi-line=3
+          - --trailing-comma
+          - --force-grid-wrap=0
+          - --use-parentheses
+          - --line-width=88
+          - -p=homeassistant
+          - --force-sort-within-sections
+-   repo: https://github.com/PyCQA/pydocstyle
+    rev: 6.1.1
+    hooks:
+    -   id: pydocstyle
+-   repo: https://github.com/pre-commit/mirrors-mypy
+    rev: 'v0.930'
+    hooks:
+    -   id: mypy

pylintrc

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+[MASTER]
+ignore=tests
+# Use a conservative default here; 2 should speed up most setups and not hurt
+# any too bad. Override on command line as appropriate.
+jobs=2
+persistent=no
+
+[BASIC]
+good-names=id,i,j,k,ex,Run,_,fp
+max-attributes=15
+
+[MESSAGES CONTROL]
+# Reasons disabled:
+# too-many-* - are not enforced for the sake of readability
+# too-few-* - same as too-many-*
+disable=
+  too-few-public-methods,
+  too-many-arguments,
+  too-many-public-methods,
+  too-many-instance-attributes,
+  too-many-branches
+
+[REPORTS]
+score=no
+
+[FORMAT]
+expected-line-ending-format=LF

requirements_lint.txt

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+black==21.12b0
+flake8==4.0.1
+isort==5.10.1
+mypy==0.930
+pre-commit==2.16.0
+pydocstyle==6.1.1
+pylint==2.12.2