From: Ramkumar Ramachandra <artagnon@gmail.com>
Date: Thu, 21 Mar 2013 12:32:32 GMT
Subject: Re: Which file is older in history?
Message-ID: <CALkWK0nOzUXk0cFh8GCHc=YqLkRJ2XNFgU_tOsua81ROK99mXw@mail.gmail.com>
In-Reply-To: <20130321122428.GB22607@sigill.intra.peff.net>

Jeff King wrote:
> On Thu, Mar 21, 2013 at 08:21:30AM -0400, Jeff King wrote:
>
>> On Thu, Mar 21, 2013 at 05:29:39PM +0530, Ramkumar Ramachandra wrote:
>>
>> > > This must be a trick question but the naïve way I think of is
>> > >
>> > >         git log --diff-filter=A -- path1 path2
>> >
>> > Thanks, I didn't know about --diff-filter.  I'll need one extra step
>> > to figure out which commit corresponds to the introduction of which
>> > file, no?
>>
>> Maybe
>>
>>   git log --format=%H --name-status --diff-filter=A -- path1 path2 |
>>   perl -lne '
>>     if (/[0-9a-f]{40}/) { $commit = $& }
>>     elsif (/^A\t(.*)/) { $h{$1} = $commit }
>>     END { print "$h{$_} $_" for keys(%h) }
>>   '
>
> Actually, I only looked at your question, not the original point, which
> was not which commit was which, but which one was older. If you just
> want to know which is older, then just:
>
>   git log --format=%H --name-status --diff-filter=A -- path1 path2 |
>   grep ^A |
>   tail -1

Great!  I just learnt about --name-status now.
Nit: tail -<n> is deprecated in favor of tail -n <n>, I think.  It's
nicer to have definite fixed command line options, as opposed to
parsing an arbitrary -(*) and deciding if \1 is a \d+.