strange behavior of exclude option

[bluebrown]

Bug Report

To Reproduce
When I run mypy from the command line, I can see it's using the exclude option specified in setup.cfg.

[mypy]
python_executable = .venv/bin/python
exclude = alembic
warn_return_any = True
warn_unused_configs = True
disallow_untyped_defs = True
disallow_untyped_decorators = True
warn_redundant_casts = True
warn_unreachable = True
warn_unused_ignores = True
show_column_numbers = True
ignore_missing_imports = True

But VS Code is marking the files in the excluded alembic folder still with errors. Providing an additional flag in settings.json didn't help either.

"python.linting.mypyEnabled": true,
"python.linting.mypyArgs": [
  "--exclude=alembic"
],

I managed to get it working with `python.linting.ignorePatterns``.

"python.linting.ignorePatterns": [
  "alembic/**/*.py"
],

I found out that the same problem occurs with another tool. So this probably unrelated to VS Code. When I run my pre-commit hook. All options are picked up, but it's not excluding the pattern given in exclude.

- repo: https://github.com/pre-commit/mirrors-mypy
  rev: v0.910
  hooks:
    - id: mypy
      additional_dependencies: [tokenize-rt==4.1.0]

Providing it with an extra flag there also doesn't help. Unfortunately, I have found a workaround like in VS Code for the hook so far.

Your Environment

• Mypy version used: v0.910
• Python version used: 3.8
• Operating system and version: ubuntu20.04 (wsl2)

[emmatyping]

I found out that the same problem occurs with another tool. So this probably unrelated to VS Code.

This would lead me to the opposite conclusion. If the issue happens with and without mypy, wouldn't that mean its more likely VSCode's fault?

[bluebrown]

Two separate tools, VS Code and pre-commit, having both problems propagating exclude to the underlying mypy installation. It is this hook https://github.com/pre-commit/mirrors-mypy. Pre commit runs on git commit, it is unrelated to VS Code.

Not, VS Code has issues setting this for 2 tools. But 2 tools having issues setting this for mypy.

[emmatyping]

Ah this seems to be a duplicate of #11094. I'll leave a comment there explaining things.