typing: Add run_mypy.py for easier mypy invocation

.github/workflows/lint_mypy.yml

@@ -31,4 +31,4 @@ jobs:
       with:
         python-version: '3.x'
     - run: python -m pip install mypy
-    - run: mypy --follow-imports=skip mesonbuild/interpreterbase.py mesonbuild/mtest.py mesonbuild/minit.py mesonbuild/mintro.py mesonbuild/mparser.py mesonbuild/msetup.py mesonbuild/ast mesonbuild/wrap tools/ mesonbuild/modules/fs.py mesonbuild/dependencies/boost.py mesonbuild/dependencies/mpi.py mesonbuild/dependencies/hdf5.py mesonbuild/compilers/mixins/intel.py mesonbuild/mlog.py mesonbuild/mcompile.py mesonbuild/mesonlib.py mesonbuild/arglist.py
+    - run: python run_mypy.py

mesonbuild/mlog.py

@@ -56,7 +56,7 @@ def colorize_console() -> bool:
     sys.stdout.colorize_console = _colorize_console  # type: ignore[attr-defined]
     return _colorize_console
 
-def setup_console():
+def setup_console() -> None:
     # on Windows, a subprocess might call SetConsoleMode() on the console
     # connected to stdout and turn off ANSI escape processing. Call this after
     # running a subprocess to ensure we turn it on again.

run_mypy.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+
+import sys
+import subprocess
+from pathlib import Path
+import typing as T
+
+normal_modules = [
+  'mesonbuild/interpreterbase.py',
+  'mesonbuild/mtest.py',
+  'mesonbuild/minit.py',
+  'mesonbuild/mintro.py',
+  'mesonbuild/mparser.py',
+  'mesonbuild/msetup.py',
+  'mesonbuild/ast',
+  'mesonbuild/wrap',
+  'tools',
+  'mesonbuild/modules/fs.py',
+  'mesonbuild/dependencies/boost.py',
+  'mesonbuild/dependencies/mpi.py',
+  'mesonbuild/dependencies/hdf5.py',
+  'mesonbuild/compilers/mixins/intel.py',
+  'mesonbuild/mlog.py',
+  'mesonbuild/mcompile.py',
+  'mesonbuild/mesonlib.py',
+  'mesonbuild/arglist.py',
+  # 'mesonbuild/envconfig.py',
+]
+
+strict_modules = [
+  'mesonbuild/interpreterbase.py',
+  # 'mesonbuild/mesonlib.py',
+  'mesonbuild/mlog.py',
+  'mesonbuild/ast',
+]
+
+normal_args = ['--follow-imports=skip']
+strict_args = normal_args + [
+  '--warn-redundant-casts',
+  '--warn-unused-ignores',
+  '--warn-return-any',
+  # '--warn-unreachable',
+  '--disallow-untyped-calls',
+  '--disallow-untyped-defs',
+  '--disallow-incomplete-defs',
+  '--disallow-untyped-decorators',
+  # '--disallow-any-expr',
+  # '--disallow-any-decorated',
+  # '--disallow-any-explicit',
+  # '--disallow-any-generics',
+  # '--disallow-subclassing-any',
+]
+
+def run_mypy(opts: T.List[str], modules: T.List[str]) -> int:
+  root = Path(__file__).absolute().parent
+  p = subprocess.run(
+    [sys.executable, '-m', 'mypy'] + opts + modules,
+    cwd=root,
+  )
+  return p.returncode
+
+def check_mypy() -> None:
+  try:
+    import mypy
+  except ImportError:
+    print('Failed import mypy')
+    sys.exit(1)
+
+def main() -> int:
+  res = 0
+  check_mypy()
+
+  print('Running normal mypy check...')
+  res += run_mypy(normal_args, normal_modules)
+
+  print('\n\nRunning struct mypy check...')
+  res += run_mypy(strict_args, strict_modules)
+
+  return res
+
+if __name__ == '__main__':
+  sys.exit(main())