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Date: Wed, 2 Dec 2015 07:43:01 +1100
From: Duncan Roe <duncan_roe@acslink.net.au>
To: cygwin@cygwin.com
Subject: Re: Calling cygpath from find exec?
Message-ID: <20151201204301.GB2707@dimstar.local.net>
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References: <56537B03.4050204@codespunk.com> <565383D5.3010709@redhat.com>
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User-Agent: Mutt/1.5.22 (2013-10-16)

On Mon, Nov 23, 2015 at 02:23:33PM -0700, Eric Blake wrote:
> On 11/23/2015 01:45 PM, Matt D. wrote:
> > Is there a reason why these produce different results?
> >
> > find . -exec cygpath -wa {} \;
> > find . -exec echo $(cygpath -wa {}) \;
>
> Incorrect quoting.  You are invoking:
>
> find . -exec echo c:\cygwin\home\you\{} \;
>
> (or whatever ./{} resolves to), instead of one cygpath per name found by
> find.
>
> >
> > I have to do this which is much slower:
> > find . -exec bash -c 'echo $(cygpath -wa {})' \;
> >
>
> This indeed quotes things so that cygpath is now invoked once per file,
> but at the expense of an additional bash per file as well.
>
> Why not just:
>
> find . -exec cygpath -wa {} +
>
> since cygpath handles more than one file in an invocation (that is,
> using '-exec {} +' rather than '-exec {} \;' is generally faster).
>
I would be using xargs. Especially under /cygdrive, the "-print0 / xargs -0"
combination takes care of spaces and other nasties in file names.

find . -print0 | xargs -0 cygpath -wa

For utilities that only accept one argument, you can use xargs -n1 -0; you
still get the benefit of -print0.

Cheers ... Duncan.

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