chore: update mypy and move to toml (#547)

* Updates mypy to 0.950
* Uses pyproject.toml insted of mypy.ini - nicer config, fewer files
* Uses `strict = true` instead of the long list (supported last few versions)
* Uses more precise include ignoring, and includes a couple of typing requirements
    * Exposes a variable type change, fixed
* Adds a few extra (easy) strictness and config flags. Didn't add unreachable, since it was more involved.

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Co-authored-by: Pradyun Gedam <pradyunsg@gmail.com>

.pre-commit-config.yaml

@@ -8,11 +8,12 @@ repos:
       - id: trailing-whitespace
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.942
+    rev: v0.950
     hooks:
       - id: mypy
         exclude: '^(docs|tasks|tests)|setup\.py'
         args: []
+        additional_dependencies: [pyparsing, nox]
 
   - repo: https://github.com/asottile/pyupgrade
     rev: v2.32.0

MANIFEST.in

@@ -4,7 +4,6 @@ include LICENSE LICENSE.APACHE LICENSE.BSD
 include .coveragerc
 include .flake8
 include .pre-commit-config.yaml
-include mypy.ini
 
 recursive-include docs *
 recursive-include tests *.py

packaging/requirements.py

@@ -20,7 +20,7 @@
     stringStart,
 )
 
-from .markers import MARKER_EXPR, Marker
+from .markers import MARKER_EXPR as _MARKER_EXPR, Marker
 from .specifiers import LegacySpecifier, Specifier, SpecifierSet
 
 
@@ -66,7 +66,7 @@ class InvalidRequirement(ValueError):
 VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
 VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
 
-MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR = originalTextFor(_MARKER_EXPR())("marker")
 MARKER_EXPR.setParseAction(
     lambda s, l, t: Marker(s[t._original_start : t._original_end])
 )

pyproject.toml

@@ -1,3 +1,13 @@
 [build-system]
 requires = ['setuptools >= 40.8.0', 'wheel']
 build-backend = 'setuptools.build_meta'
+
+
+[tool.mypy]
+strict = true
+show_error_codes = true
+enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
+
+[[tool.mypy.overrides]]
+module = ["_manylinux"]
+ignore_missing_imports = true