[PATCH] emacs: Make the shell location configurable

[Robert Ewald]

Hello,

Thanks for reviewing the patch.

> On 15 Aug 2017, at 18:02, David Bremner <david at tethera.net> wrote:
> 
> Robert Ewald <robewald at gmx.net> writes:
> 
>> The location of the shell is not always /bin/sh. Use the
>> shell-file-name variable to be able to specify the shell location.
>> ---
> 
> Can you say a bit more about the problem you are trying to solve? I
> think shell-file-name is not guaranteed to be Bourne shell compatible.

I would like to use notmuch with a remote-notmuch script on emacs on 
windows (not cygwin).

Right now I cannot make this work, because that version of emacs doesn't 
have any kind of unix style paths. I have an installation of msys that 
provides the usual unix tools. This is configured in the init.el by
setting shell-file-name.

Does the shell-file-name have to be bourne shell compatible? My
understanding is that using "/bin/sh" requires a POSIX compatible shell, 
bash specific shell scripts should be invoked with e.g. /bin/bash.
I believe a POSIX compatible shell is sufficient in this particular case. 
Of course, if shell-file-name is not POSIX compatible this line may not 
work.

Another way would be to introduce another configuration variable, but I 
would like to avoid that.

Best regards

Robert