add support for mypy

Signed-off-by: Trevor James Smith <10819524+Zeitsperre@users.noreply.github.com>

{{cookiecutter.project_slug}}/.pre-commit-config.yaml

@@ -65,6 +65,10 @@ repos:
     rev: v2.13
     hooks:
       - id: vulture
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.14.1
+    hooks:
+      - id: mypy
   {%- if cookiecutter.use_black == 'y' %}
   - repo: https://github.com/keewis/blackdoc
     rev: v0.3.9

{{cookiecutter.project_slug}}/docs/conf.py

@@ -19,6 +19,7 @@
 #
 import os
 import sys
+from typing import Any
 
 sys.path.insert(0, os.path.abspath('..'))
 
@@ -138,7 +139,7 @@
 
 # -- Options for LaTeX output ------------------------------------------
 
-latex_elements = {
+latex_elements: dict[str, Any] = {
     # The paper size ('letterpaper' or 'a4paper').
     #
     # 'papersize': 'letterpaper',

{{cookiecutter.project_slug}}/src/{{cookiecutter.project_slug}}/cli.py

@@ -10,7 +10,7 @@ def main():
     parser.add_argument('_', nargs='*')
     args = parser.parse_args()
 
-    print("Arguments: " + str(args._))
+    print(f"Arguments: {args._}")
     print("Replace this message by putting your code into {{cookiecutter.project_slug}}.cli.main")
     return 0
 
@@ -25,7 +25,7 @@ def main():
 
 
 @click.command()
-def main(args=None):
+def main(args=None) -> int:
     """Console script for {{cookiecutter.project_slug}}."""
     click.echo(
         "Replace this message by putting your code into {{cookiecutter.project_slug}}.cli.main",
@@ -43,8 +43,8 @@ def main(args=None):
 console = Console()
 
 
-@app.command()
-def main():
+@app.command()  # type: ignore[misc]
+def main() -> None:
     """Console script for {{cookiecutter.project_slug}}."""
     console.print(
         "Replace this message by putting your code into {{cookiecutter.project_slug}}.cli.main",

{{cookiecutter.project_slug}}/tests/test_{{cookiecutter.project_slug}}.py

@@ -73,9 +73,13 @@ def test_command_line_interface(self):
 
 def test_package_metadata():
     """Test the package metadata."""
-    project = find_spec("{{ cookiecutter.project_slug }}").submodule_search_locations[0]
+    project = find_spec("{{ cookiecutter.project_slug }}")
 
-    metadata = pathlib.Path(project).resolve().joinpath("__init__.py")
+    assert project is not None
+    assert project.submodule_search_locations is not None
+    location = project.submodule_search_locations[0]
+
+    metadata = pathlib.Path(location).resolve().joinpath("__init__.py")
 
     with metadata.open() as f:
         contents = f.read()