b4 adds Link trailer although not asked to?

Matthias Beyer <[email protected]> Sun, 26 Apr 2026 12:21:32 +0200

Newsgroups	org.kernel.linux.tools
Message-ID	<e3mhkyielk4berng7qdypcyty5e7yru3u4hsyx2fgzta56ryzf@xufrwmpc3g4b>

Hi,

(CC Konstantin as author of the file mentioned below)

I am currently playing with b4 and am wondering why b4 adds a `Link:`
trailer even though I did not specify `--add-link`.

There's no configuration file around

    git config list | grep b4 # no output

or something, here's what I did:

    notmuch show --format=mbox $SOME_NOTMUCH_QUERY | b4 am -m - -o -

and it prints the resulting patches with a `Link: ...`.

FWIW, I am not in the kernel context, so a lore.kernel.org link is wrong
for my usecase (I know I can set an alternative mask, but I don't want
any link in the resulting commits here).

The above was tested with b4 0.14.3 and 0.15.2.

The only source line in b4 that sets addlink=True is in

    src/b4/mbox.py:135

but I don't see how that line is hit in my case, because `addmsgid`
should be False here (False by default).

Hope you can help me here,
Best,
Matthias

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