refactor: Add mypy to CI, type corrections (#786)

Author: tony

.github/workflows/tests.yml

@@ -90,9 +90,13 @@ jobs:
     - name: Install python dependencies
       run: |
         poetry install -E "test coverage lint"
+
     - name: Lint with flake8
-      run: |
-        poetry run flake8
+      run: poetry run flake8
+
+    - name: Lint with mypy
+      run: poetry run mypy .
+
     - name: Test with pytest
       continue-on-error: ${{ matrix.tmux-version == 'master' }}
       run: |

CHANGES

@@ -24,6 +24,7 @@ $ pipx install --suffix=@next 'tmuxp' --pip-args '\--pre' --force
 - libtmux updated from v0.12 to v0.14 {issue}`790`
 - Add [doctest](https://docs.python.org/3/library/doctest.html) w/
   [pytest + doctest](https://docs.pytest.org/en/7.1.x/how-to/doctest.html), ({issue}`791`).
+- Added basic [mypy](http://mypy-lang.org/) type annotations via {issue}`786`
 
 ## tmuxp 1.12.1 (2022-08-04)
 

docs/_ext/aafig.py

@@ -10,19 +10,15 @@
     :author: Leandro Lucarella <llucax@gmail.com>
     :license: BOLA, see LICENSE for details
 """
+import logging
 import posixpath
+from hashlib import sha1 as sha
 from os import path
 
 from docutils import nodes
 from docutils.parsers.rst.directives import flag, images, nonnegative_int
 from sphinx.errors import SphinxError
-from sphinx.util import ensuredir, logging, relative_uri
-
-try:
-    from hashlib import sha1 as sha
-except ImportError:
-    from sha import sha
-
+from sphinx.util.osutil import ensuredir, relative_uri
 
 try:
     import aafigure

docs/conf.py

@@ -1,6 +1,7 @@
 # flake8: NOQA E5
 import inspect
 import sys
+import typing as t
 from os.path import dirname, relpath
 from pathlib import Path
 
@@ -14,7 +15,7 @@
 sys.path.insert(0, str(cwd / "_ext"))
 
 # package data
-about = {}
+about: t.Dict[str, str] = {}
 with open(project_root / "tmuxp" / "__about__.py") as fp:
     exec(fp.read(), about)
 
@@ -61,8 +62,8 @@
 html_static_path = ["_static"]
 html_favicon = "_static/favicon.ico"
 html_theme = "furo"
-html_theme_path = []
-html_theme_options = {
+html_theme_path: t.List[str] = []
+html_theme_options: t.Dict[str, t.Union[str, t.List[t.Dict[str, str]]]] = {
     "light_logo": "img/tmuxp.svg",
     "dark_logo": "img/tmuxp.svg",
     "footer_icons": [

docs/developing.md

@@ -334,6 +334,106 @@ this will load the `.tmuxp.yaml` in the root of the project.
 
 ```
 
+## Formatting
+
+The project uses [black] and [isort] (one after the other). Configurations are in `pyproject.toml`
+and `setup.cfg`:
+
+- `make black isort`: Run `black` first, then `isort` to handle import nuances
+
+## Linting
+
+[flake8] and [mypy] run via CI in our GitHub Actions. See the configuration in `pyproject.toml` and
+`setup.cfg`.
+
+### flake8
+
+[flake8] provides fast, reliable, barebones styling and linting.
+
+````{tab} Command
+
+poetry:
+
+```console
+$ poetry run flake8
+```
+
+If you setup manually:
+
+```console
+$ flake8
+```
+
+````
+
+````{tab} make
+
+```console
+$ make flake8
+```
+
+````
+
+````{tab} Watch
+
+```console
+$ make watch_flake8
+```
+
+requires [`entr(1)`].
+
+````
+
+````{tab} Configuration
+
+See `[flake8]` in setup.cfg.
+
+```{literalinclude} ../setup.cfg
+:language: ini
+:start-at: "[flake8]"
+:end-before: "[isort]"
+
+```
+
+````
+
+### mypy
+
+[mypy] is used for static type checking.
+
+````{tab} Command
+
+poetry:
+
+```console
+$ poetry run mypy .
+```
+
+If you setup manually:
+
+```console
+$ mypy .
+```
+
+````
+
+````{tab} make
+
+```console
+$ make mypy
+```
+
+````
+
+````{tab} Watch
+
+```console
+$ make watch_mypy
+```
+
+requires [`entr(1)`].
+````
+
 (gh-actions)=
 
 ## Continuous integration
@@ -350,6 +450,10 @@ the [gh build site].
 [py.test usage argument]: https://pytest.org/latest/usage.html
 [entr]: http://entrproject.org/
 [`entr(1)`]: http://entrproject.org/
+[black]: https://github.com/psf/black
+[isort]: https://pypi.org/project/isort/
+[flake8]: https://flake8.pycqa.org/
+[mypy]: http://mypy-lang.org/
 [github actions]: https://github.com/features/actions
 [gh build site]: https://github.com/tmux-python/tmuxp/actions?query=workflow%3Atests
 [.github/workflows/tests.yml]: https://github.com/tmux-python/tmuxp/blob/master/.github/workflows/tests.yml

poetry.lock

@@ -86,6 +86,8 @@ isort = "*"
 ### Lint ###
 flake8 = "*"
 mypy = "*"
+types-colorama = "^0.4.15"
+types-docutils = "^0.19.0"
 
 [tool.poetry.extras]
 docs = [
@@ -107,8 +109,20 @@ docs = [
 test = ["pytest", "pytest-rerunfailures", "pytest-mock", "pytest-watcher"]
 coverage = ["codecov", "coverage", "pytest-cov"]
 format = ["black", "isort"]
-lint = ["flake8", "mypy"]
+lint = ["flake8", "mypy", "types-colorama", "types-docutils"]
 
 [build-system]
 requires = ["poetry_core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
+
+[[tool.mypy.overrides]]
+module = [
+  "kaptan",
+  "aafigure",
+  "libtmux.*",
+  "IPython.*",
+  "ptpython.*",
+  "prompt_toolkit.*",
+  "bpython"
+]
+ignore_missing_imports = true

pyproject.toml

@@ -5,12 +5,6 @@ max-line-length = 88
 # Stuff we ignore thanks to black: https://github.com/ambv/black/issues/429
 extend-ignore = E203,W503
 
-[tool:pytest]
-filterwarnings = 
-	ignore:distutils Version classes are deprecated. Use packaging.version instead.
-addopts = --reruns=0 --tb=short --no-header --showlocals --doctest-modules
-doctest_optionflags = ELLIPSIS NORMALIZE_WHITESPACE
-
 [isort]
 profile = black
 combine_as_imports= true
@@ -21,3 +15,9 @@ known_pytest = pytest,py
 known_first_party = libtmux,tmuxp
 sections = FUTURE,STDLIB,PYTEST,THIRDPARTY,FIRSTPARTY,LOCALFOLDER
 line_length = 88
+
+[tool:pytest]
+filterwarnings = 
+	ignore:distutils Version classes are deprecated. Use packaging.version instead.
+addopts = --reruns=0 --tb=short --no-header --showlocals --doctest-modules
+doctest_optionflags = ELLIPSIS NORMALIZE_WHITESPACE

setup.cfg

@@ -0,0 +1,13 @@
+import dataclasses
+import typing as t
+
+
+@dataclasses.dataclass
+class TestConfigData:
+    expand1: t.Any
+    expand2: t.Any
+    expand_blank: t.Any
+    sampleconfig: t.Any
+    shell_command_before: t.Any
+    shell_command_before_session: t.Any
+    trickle: t.Any

tests/fixtures/structures.py

@@ -2,6 +2,7 @@
 import json
 import os
 import pathlib
+import typing as t
 from unittest.mock import MagicMock
 
 import pytest
@@ -416,7 +417,7 @@ def test_regression_00132_session_name_with_dots(
 ):
     yaml_config = FIXTURE_PATH / "workspacebuilder" / "regression_00132_dots.yaml"
     cli_args = [str(yaml_config)]
-    inputs = []
+    inputs: t.List[str] = []
     runner = CliRunner()
     result = runner.invoke(
         cli.command_load, cli_args, input="".join(inputs), standalone_mode=False