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From: Dave Love <d.love@dl.ac.uk>
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Subject: Re: [PATCH] Use shell-command-on-region in pgg-gpg.el
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Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> I'm kinda surprised that that would make any difference.  If the
> command uses environment variables, it should heed them in any case,
> shouldn't it?

That presumably depends on details of what you've had to do under Doze
to use shell commands (e.g. Cygwin bash).
>
>> I haven't been able to test the original implementation
>> (since call-process-region does not use my proxy settings)
>> and don't know if the output from the command is supposed to
>> pop up in a new frame. Now it does.
>
> It's not supposed to do that, which is why one doesn't use
> `shell-command*' in programs.

But one does (in various places)!  See the OUTPUT-BUFFER arg to
redirect output.