Re: Getting first tag per branch for a commit

Junio C Hamano [off-list ref] writes:

Orgad Shaneh [off-list ref] writes:

quoted

What I'd like to have is a way to tell the first tag per branch (or
per merge) that the commit appeared on.

quoted

I think that this can be done by filtering out tags that are connected
to already listed tags by first-parent link.

Yes.  When one tag can be reached by another tag, then the former is
definitely an earlier tag than the latter.

A trivial way to compute it would require O(n^2) invocations of "git
merge-base --is-ancestor".  Alternatively, I think you can perhaps
use "git merge-base --independent".

Ah, forget the latter.  "independent" is about solving the opposite
use case--it is to cull the ones that can be reached by other tips.