From: Anselm Schüler <mail@anselmschueler.com>
Date: Fri, 21 Aug 2026 11:13:13 GMT
Subject: Questions about --ext-diff
Message-ID: <1c1567ec-c81a-45be-8b92-2c995dd34c16@anselmschueler.com>

I’m unsure what the purpose of --ext-diff is. It seems to me that custom 
diff filters should just always be executed.

Is --ext-diff a security feature? It seems like it isn’t, since git-diff 
will happily execute the diff filter.

Maybe I don’t correctly understand what a diff filter is intended to be 
used for. What situation would you want a diff filter to be run by 
git-diff, but not by e.g. git-show?

~Anselm Schüler <mail@anselmschueler.com>