How to preserve git author line-by-line when using a code formatter?

Question

We are sick of linting. So we want to use black in our project. Unfortunately, it changes almost every other line in our project which would make us loose most of our authorship information. We use annotate in pycharm or git blame a lot to figure out who to talk to when looking at specific code pieces. How could this information be preserved when changing lots of files in one commit?

Edit: As this is a duplicate of this question, I'd like to focus rather on a "as good as possible" approach.

Let's assume the lint commit is created by an artificial (but known) author, hence serving as a flag. Is it then possible to create a git blame like output which shows all authors since this key lint commit as well as any previous author of lines that were changed in that commit?

I realize this wouldn't work well for lines that were split / merged but it at least gives a faster way to limit the scope of potential persons to talk to to 1,2,3 people.

Answer 1

From https://git-scm.com/docs/git-blame#Documentation/git-blame.txt---ignore-revltrevgt:

--ignore-rev

Ignore changes made by the revision when assigning blame, as if the change never happened. Lines that were changed or added by an ignored commit will be blamed on the previous commit that changed that line or nearby lines. This option may be specified multiple times to ignore more than one revision. If the blame.markIgnoredLines config option is set, then lines that were changed by an ignored commit and attributed to another commit will be marked with a ? in the blame output. If the blame.markUnblamableLines config option is set, then those lines touched by an ignored commit that we could not attribute to another revision are marked with a *.

If the code formatting is all done in a single commit, I think you could use that flag. There's also a --ignore-revs-file that looks useful if you want to ignore more than a single commit.