linux-kernel - Re: email as a bona fide git transport

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Date:   Tue, 22 Oct 2019 18:29:34 +0200
From:   Vegard Nossum <vegard.nossum@...cle.com>
To:     "Theodore Y. Ts'o" <tytso@....edu>
Cc:     Willy Tarreau <w@....eu>, Santiago Torres Arias <santiago@....edu>,
        workflows@...r.kernel.org, Git Mailing List <git@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Konstantin Ryabitsev <konstantin@...uxfoundation.org>,
        Eric Wong <e@...24.org>
Subject: Re: email as a bona fide git transport


On 10/22/19 3:53 PM, Theodore Y. Ts'o wrote:
> On Tue, Oct 22, 2019 at 02:11:22PM +0200, Vegard Nossum wrote:
>>
>> As I wrote in there, we could already today start using
>>
>>    git am --message-id
>>
>> when applying patches and this would provide something that a bot could
>> annotate with git notes pointing to lore/LKML/LWN/whatever. I think that
>> would already be a pretty nice improvement over today's situation.
>>
>> Sadly, since the beginning of 2018, this was only used for a measly
>> ~0.14% of all non-merge commits in the kernel:
>>
>> $ git rev-list --count --no-merges --since='2018-01-01' --grep 'Message-Id:
>> ' linus/master
>> 178
> 
> You might also want to count commits which have a link tag with a
> Message-Id:
> 
> Link: https://lore.kernel.org/r/c3438dad66a34a7d4e7509a5dd64c2326340a52a.1571647180.git.mbobrowski@mbobrowski.org
> 
> That's because some kernel developers have been using a hook script like this:
> 
> #!/bin/sh
> # For .git/hooks/applypatch-msg
> #
> # You must have the following in .git/config:
> # [am]
> #	messageid = true
> 	
> . git-sh-setup
> perl -pi -e 's|^Message-Id:\s*<?([^>]+)>?$|Link: https://lore.kernel.org/r/$1|g;' "$1"
> test -x "$GIT_DIR/hooks/commit-msg" &&
> 	exec "$GIT_DIR/hooks/commit-msg" ${1+"$@"}
> :
> 
> .... as we had reached rough consensus that this was the best way to
> incorprate the message id (since it could made to be a clickable link
> in tools like gitk, for example).  This rough consensus has only been
> in place since around the time of the Maintainer's Summit in Lisbon,
> so uptake is still probably a bit slow.  I'd expect to see a lot more
> of this in the next merge window, though.

Thanks, I was not aware of this!

Seems like something that should go in Documentation/maintainer/,
right?

The figure is much better, 16.7% on all non-merges since 2018-01-01.
This should help and we can maybe already do some interesting things
with git notes and lore/public-inbox.


Vegard