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bug#27456: 25.2; Not possible to use -prune with find-dired

From: Michael Heerdegen
Subject: bug#27456: 25.2; Not possible to use -prune with find-dired
Date: Wed, 19 Jul 2017 02:21:20 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

Allen Li <address@hidden> writes:

> PS Upon closer reading, it sounds like you're suggesting to do
> (find-dired "~/.emacs.d" "-name \"elpa\" -prune -o -name \"*.el\" ")

Yes, that's what I meant.  Don't specify "-ls" yourself.

> PPS In a sudden flash of insight, I thought of using (find-dired
> "~/.emacs.d" "-name \"elpa\" -prune -false -o -name \"*.el\"")

I think this is the canonical solution for your use case. "-prune"
doesn't fail, so you need to add "-false" for the directory itself to be
left out.

> Since I have found a workaround for my use case, I am okay with this
> being closed now, but I feel like there may be more complex find
> commands that I may want to do in the future where this either does
> not work or introduces a lot more complexity, in which case I (or
> someone else) will have to reopen this bug or create a new one.  I
> think it would be valuable for someone experienced with find to chime
> in, but I think that perhaps find-dired shouldn't always construct a
> command like "find \( <args> \) -ls"

I doubt that it is really a big problem in practice, but I don't close
the bug for now, not being an expert on "find" myself.



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