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Date: Wed, 3 Jul 2019 00:49:02 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: Theodore Ts'o <tytso@mit.edu>
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Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
	ksummit-discuss@lists.linuxfoundation.org
Subject: Re: [Ksummit-discuss] [MAINTAINERS SUMMIT] Patch version changes in
 commit logs?
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On Tue, 2 Jul 2019, Theodore Ts'o wrote:
> On Tue, Jul 02, 2019 at 03:26:48PM -0700, James Bottomley wrote:
> > git is our upstream for version control and our upstream has already
> > had this as a feature since 2014.  Trying to go to upstream  5 years
> > later and ask them to change it is likely going to be a singularly
> > unsuccessful exercise, plus even in the unlikely event we can work out
> > how to do it compatibly and without causing confusion and upstream said
> > yes it would take another few years to propagate.
> 
> If we really want to use the Link: header, we should be able to do
> this without requiring any changes to git.
> 
> Step 1)   git config am.messageid true
> Step 2)   Write and install a .git/hooks/applypatch-msg script which
> 	  looks for Message-Id: and transmogrifies that line to a
> 	  Link: trailer, using the lore.kernel.org URL template
> Step 3)   Document this in Documentation/process.  For bonus points
> 	  create a script which automatically sets up the user's git
> 	  configuration by setting up am.messageid config and
> 	  installing the hook file.
> Step 4)   Profit

Amen.