Add mypy pre-commit

Signed-off-by: Cristian Le <cristian.le@mpsd.mpg.de>

Author: LecrisUT

.pre-commit-config.yaml

@@ -38,3 +38,9 @@ repos:
       - id: end-of-file-fixer
       - id: mixed-line-ending
       - id: trailing-whitespace
+
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: "v1.4.1"
+    hooks:
+      - id: mypy
+        files: ^(fmf)

fmf/base.py

@@ -6,11 +6,17 @@
 import os
 import re
 import subprocess
+import sys
 from collections.abc import Iterator, Mapping
 from io import open
 from pprint import pformat as pretty
 # TODO: py3.10: typing.Optional, typing.Union -> '|' operator
-from typing import Any, Optional, TypeAlias, Union
+from typing import Any, Optional, Union
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
 
 import jsonschema
 from ruamel.yaml import YAML

fmf/context.py

@@ -19,9 +19,15 @@
 from __future__ import annotations
 
 import re
+import sys
 from collections.abc import Callable
 # TODO: py3.10: typing.Optional, typing.Union -> '|' operator
-from typing import Optional, TypeAlias, Union
+from typing import Optional, Union
+
+if sys.version_info >= (3, 10):
+    from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
 
 # TypeHints
 ExpressionType: TypeAlias = tuple[Optional[str], Union[str, bool], Optional[list[str]]]

pyproject.toml

@@ -0,0 +1,8 @@
+[tool.mypy]
+strict = true
+files = ["fmf"]
+python_version = "3.9"
+warn_unused_configs = true
+show_error_codes = true
+disallow_untyped_defs = false
+follow_imports = "normal"

setup.py

@@ -24,6 +24,7 @@
     'ruamel.yaml',
     'filelock',
     'jsonschema',
+    'typing-extensions ; python_version<"3.10"',
     ]
 extras_require = {
     'docs': ['sphinx>=3', 'sphinx_rtd_theme'],