Re: [PATCH 0/1] replay: add --revert option to reverse commit changes

[Junio C Hamano <gitster@pobox.com>]

Siddharth Asthana <siddharthasthana31@gmail.com> writes:

> 1. For quick undoing an entire MR, the `merge-tree` approach you 
> suggest is indeed more efficient and avoids unnecessary intermediate 
> conflicts.
>
> 2. For commit-by-commit reverts, we need individual revert commits with 
> proper attribution (which commit is being reverted) for auditability and 
> history clarity. This is particularly useful when only specific commits 
> from a merged branch need to be reverted.

These are both good workflows with appropriate uses.  To make the
tool useful for #2, it needs to be able to allow "I have merged a
topic with 7 commits, but the first commit and the fourth commit are
faulty and I need to revert them", i.e., not just a range (like
"rebase" and "cherry-pick" workflows take), but a set of commits
that are potentially disconnected.  The current command line
arguments "git replay" supports, or "git revert A..B" for that
matter, are not exactly a good fit for such a use case, although the
user can of course run two single-commit revert operations in a row.