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

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Message-ID: <20191022190127.GA697@dcvr>
Date:   Tue, 22 Oct 2019 19:01:27 +0000
From:   Eric Wong <e@...24.org>
To:     Vegard Nossum <vegard.nossum@...cle.com>
Cc:     Willy Tarreau <w@....eu>, "Theodore Y. Ts'o" <tytso@....edu>,
        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>
Subject: Re: email as a bona fide git transport

Vegard Nossum <vegard.nossum@...cle.com> wrote:
> I sent v2 of the patches (with metadata _after_ the diff) to the git
> list here:
> 
> https://public-inbox.org/git/20191022114518.32055-1-vegard.nossum@oracle.com/T/#u
> 
> 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:

--message-id helps provide a concrete reference, yes.  However,
being able to search for commit subjects in the mail archives is
already implemented via cgit filter.  An example is here:

https://80x24.org/mirrors/git.git/commit/?id=8da56a484800023a545d7a7c022473f5aa9e720f

The link at "userdiff: fix some corner cases in dts regex" makes a link to:

https://public-inbox.org/git/?x=t&q=%22userdiff:+fix+some+corner+cases+in+dts+regex%22
(side note: not sure if that "x=t" to expand the whole message is good...)

That link is generated by examples/cgit-commit-filter.lua in the
 public-inbox source:

https://public-inbox.org/meta/1677253/s/?b=examples/cgit-commit-filter.lua

My longer term plan is to be able to use the post-image blob OIDs
from cgit to generate a search query for public-inbox such as:

https://public-inbox.org/git/?q=dfpost:afc6b5b404+dfpost:072d58b69d+dfpost:4353b8220c+dfpost:333a625c70+dfpost:e187d356f6

Which finds all versions of the userdiff patch posted.  But AFAIK
there's no easy way to get at blob OIDs from cgit to a Lua filter...