fix(pre-commit): fix file passing errors

`pre-commit` is known to override behavior from config files in
certain instances. This commit fixes known issues for:

- `isort`
- `black`
- `mypy`

For relevant details, see:

isort:
  + https://jugmac00.github.io/blog/isort-and-pre-commit-a-friendship-with-obstacles/
  + PyCQA/isort#885

black:
  + psf/black#1584

mypy:
  + python/mypy#4008 (comment)
  + https://pre-commit.com/#hooks-pass_filenames

.isort.cfg

@@ -6,4 +6,11 @@ force_grid_wrap=0
 use_parentheses=True
 line_length=88
 ensure_newline_before_comments=True
-extend_skip_glob=tests/*.py,docs/*.py,setup.py
+extend_skip_glob=tests/*.py,docs/conf.py,setup.py,pyvistaqt/rwi.py
+# `pre-comment` doesn't see skips; `filter_files=True` forces it
+# to see these files
+#
+# See:
+#   - https://jugmac00.github.io/blog/isort-and-pre-commit-a-friendship-with-obstacles/
+#   - https://github.com/PyCQA/isort/issues/885
+filter_files=True

.pre-commit-config.yaml

@@ -20,6 +20,16 @@ repos:
   rev: v0.961
   hooks:
     - id: mypy
+      language: system
+      # `pass_filenames` is used to overcome the "duplicate module"
+      # error from occuring. We are explicitly passing a 'txt'
+      # file to search. This setting tells `pre-commit` to not do a
+      # search and pass files to check to mypy, like it normally does.
+      #
+      # See:
+      #   - https://github.com/python/mypy/issues/4008#issuecomment-708060733
+      #   - https://pre-commit.com/#hooks-pass_filenames
+      pass_filenames: false
       args: [
         "--config-file",
         "mypy.ini",

pyproject.toml

@@ -2,7 +2,19 @@
 line-length = 88
 skip-string-normalization = true
 target-version = ["py39"]
-exclude='\.eggs|\.git|\.mypy_cache|\.tox|\.venv|_build|buck-out|build|dist|node_modules|rwi\.py'
+# `pre-comment` doesn't see skips; `force-exclude` forces it
+# to see these files
+#
+# See:
+#   - https://github.com/psf/black/issues/1584
+force-exclude = '''
+(
+    docs/conf\.py
+  | pyvistaqt/rwi\.py
+  | tests/.*\.py
+  | setup.py
+)
+'''
 check = true
 
 [tool.pydocstyle]