Does it have to be this specific black version?

[MaGering]

Setting up github actions in PR #23, I've specified the version of black to black==20.8b1 orientating on https://github.com/rl-institut/oemof-B3/pull/25/files.

This has led to the following question:

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Does it have to be this specific black version?

Originally posted by @jnnr in #23 (comment)

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[SabineHaas]

No, the only important thing is that we all have to use the same version of black.

Also interesting, how to set up a hook so that formatting is automatic at push event:

I added a file named pre-commit (no extension) to my local git repo's .git/hooks. The file contains:

#!/bin/sh
flake8 .
black . --exclude /docs

Maybe the order matters?

Then, I made the file executable by chmod +x

Now, each time when I commit, the linters run first and stop the commit if there is mistake.

Originally posted by @jnnr in rl-institut/oemof-B3#25 (comment)

Nice thank you! I guess you could even push that to the repo, so that we can use it, as well.

Now you can use black ., no need for --exclude, as I've added a config file for black, too.

Originally posted by @SabineHaas in rl-institut/oemof-B3#25 (comment)

[jnnr]

I had problems with this pre-commit hook: black would reformat, but this would not be added and commited with the same commit. I changed the hook such that it only checks (--check gives an error, other than --diff). Now it looks like this:

#!/bin/sh

flake8 . && black . --check

[jnnr]

Can you add an inline comment to the requirement that explains why we fix the black version, @MaGering? After that, I would consider this issue as resolved.