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Thu, 16 Oct 2025 17:18:06 -0400 (EDT) From: Junio C Hamano To: James Bottomley Cc: git@vger.kernel.org Subject: Re: [PATCH 0/3] add a message-id header to git In-Reply-To: <7205e71da08f22db757b5dc0bcf3fef27db40ea4.camel@HansenPartnership.com> (James Bottomley's message of "Thu, 16 Oct 2025 17:00:40 -0400") References: <20251016185758.21996-1-James.Bottomley@HansenPartnership.com> <7205e71da08f22db757b5dc0bcf3fef27db40ea4.camel@HansenPartnership.com> Date: Thu, 16 Oct 2025 14:18:05 -0700 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Precedence: bulk X-Mailing-List: git@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain James Bottomley writes: > So this one's a bit more deliberate. If you import email and then re- > send as email we can't keep the same message-id; the internet RFCs > require us to keep message-ids unique, so git-format-patch won't output > the message-id. That necessarily also means that the poor man's rebase > you cite above will still run, but it would drop the message-id header. That is one more reason why I do not want it in the header, or "-m" to overwrite existing message-id trailer. If I received a patch via a message, applied, and forwarded it out of a commit I previously created from a message I earlier received from elsewhere, I would want the recipient of my forwarded patch message to be able to link the message I forward with the original message, probably in the mailing list archive where I took the message from in the first place.