Questions about --ext-diff

Anselm Schüler <[email protected]>
Newsgroups org.kernel.vger.git
Message-ID <[email protected]> 
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 <[email protected]>
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