What is the meaning of . (dot, period) in additional_dependencies array of pre-commit config?

Question

I came across the following .pre-commit-hooks.yaml here. It contains the following section:

additional_dependencies:
  - .

What is the meaning of the dot? Is it necessary?

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After solution I created PR to remove the unused . here.

Answer 1

in this case it does nothing, it is a mistake. I believe an older version of this was selecting specific extras like .[core] and this is an artifact of that

. is always installed and is the hook repository (in this case ansible-lint)

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disclaimer: I wrote pre-commit