Re: get commit ID from a tree object ID

From: Stefan Beller <sbeller@google.com>
Date: Mar 26, 2018, 22:14 UTC
Message-ID: <CAGZ79kZU39B42BeOxrUDxT6Nca0=Yd+O0TEgu6_HvK3O=b2KhQ@mail.gmail.com>
In-Reply-To: <xmqqwoyay48n.fsf@gitster-ct.c.googlers.com>

On Sat, Mar 17, 2018 at 10:57 AM Junio C Hamano <gitster@pobox.com> wrote:

> Jeff King <peff@peff.net> writes:

Show 11 quoted lines

> > If you want to dig further, you can use the diff machinery to show which
> > commit introduced a particular tree, like:
> >
> >   git rev-list --all |
> >   git diff-tree --stdin --pretty=raw --raw -t -r |
> >   less +/$desired_tree
> >
> > That "less" will find the mentioned tree, and then you'll have to
> > manually read the commit. It would be possible to do it mechanically
> > with a short perl script, but I'll leave that as an exercise for the
> > reader.

> Before Stefan jumps in ;-) I wonder if a recently materialized
> "find-object" option to the diff family can be used here as a
> sugar-coated way.

I am late to jump in, but testing the 'git log --find-object' seems to have issues with trees named by sha1 here, but the named tree via <commit>:<path> still seems to work.

It seems reasonable to be able to find trees using the find-object flag, though.

Stefan