Whitelist component for fixup commits

[jzaefferer]

#26 suggests allowing "fixup!" as a prefix to whitelist, but that's very specifc to the --fixup flag and will reuse the existing commit message. In our current PR workflows, we use something like "[fix]: description of the fixup".

Could also whitelist /\[[^\]]+\]:/ (anything in square brackets), along with "fixup!" and "squash!".

[jzaefferer]

@mislav any thoughts on this? Am I missing something?

[mislav]

I'm not sure what are you hinting at with square brackets, but the importance of whitelisting fixup! and squash! prefixes is:

1. They're added by git and are taken as directives to the git rebase autosquash process
2. These commits are short-lived. They're intended to be merged with other commits and never shared upstream
3. It doesn't make sense to verify the commit message of these commits since in the case of fixup!, its commit message will get discarded in the rebase process, and as for squash!: its message will get appended to the message of the original commit during rebase and re-verified again as a whole by the commit-msg git hook.

I have no opinion on the square brackets notation, as I think it represent completely different and unrelated use cases.