From 9ba3ca6ce5013207737e431f52735c7eda3a2fbb Mon Sep 17 00:00:00 2001
From: Chris Patterson <cpatterson@microsoft.com>
Date: Mon, 14 Feb 2022 12:09:01 -0500
Subject: mypy: introduce type checking (#1254)

All currently failing modules are excluded from reporting
errors using follow-imports=silent and an exclusion list.

Future work can whittle down this failing list. This change will
start enforcing new modules and those currently passing.

Includes some minor alphabetical reordering in tox.ini.

Signed-off-by: Chris Patterson <cpatterson@microsoft.com>
---
 tox.ini | 38 ++++++++++++++++++++++++++++++++------
 1 file changed, 32 insertions(+), 6 deletions(-)

(limited to 'tox.ini')

diff --git a/tox.ini b/tox.ini
index aab6d4d4..c494cb94 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py3, lowest-supported-dev, flake8, pylint, black, isort
+envlist = py3, lowest-supported-dev, black, flake8, isort, mypy, pylint
 recreate = True
 
 [testenv]
@@ -10,10 +10,15 @@ passenv=
     PYTEST_ADDOPTS
 
 [format_deps]
-flake8==3.9.2
-pylint==2.11.1
 black==21.12b0
+flake8==3.9.2
 isort==5.10.1
+mypy==0.931
+pylint==2.11.1
+pytest==7.0.0
+types-PyYAML==6.0.4
+types-requests==2.27.8
+types-setuptools==57.4.9
 
 [testenv:flake8]
 deps =
@@ -37,18 +42,30 @@ deps =
     isort=={[format_deps]isort}
 commands = {envpython} -m isort . --check-only
 
+[testenv:mypy]
+deps =
+    mypy=={[format_deps]mypy}
+    types-pyyaml=={[format_deps]types-PyYAML}
+    types-requests=={[format_deps]types-requests}
+    types-setuptools=={[format_deps]types-setuptools}
+    pytest=={[format_deps]pytest}
+commands = {envpython} -m mypy .
+
 [testenv:check_format]
 deps =
-    flake8=={[format_deps]flake8}
-    pylint=={[format_deps]pylint}
     black=={[format_deps]black}
+    flake8=={[format_deps]flake8}
     isort=={[format_deps]isort}
+    mypy=={[format_deps]mypy}
+    pylint=={[format_deps]pylint}
+    pytest=={[format_deps]pytest}
     -r{toxinidir}/test-requirements.txt
     -r{toxinidir}/integration-requirements.txt
 commands =
     {[testenv:black]commands}
-    {[testenv:isort]commands}
     {[testenv:flake8]commands}
+    {[testenv:isort]commands}
+    {[testenv:mypy]commands}
     {[testenv:pylint]commands}
 
 [testenv:do_format]
@@ -122,6 +139,15 @@ commands =
 commands = {envpython} -m flake8 {posargs:cloudinit/ tests/ tools/ setup.py}
 deps = flake8
 
+[testenv:tip-mypy]
+commands = {envpython} -m mypy --install-types --non-interactive .
+deps =
+    mypy
+    pytest
+    types-PyYAML
+    types-requests
+    types-setuptools
+
 [testenv:tip-pylint]
 commands = {envpython} -m pylint {posargs:cloudinit tests tools}
 deps =
-- 
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