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From: mlell@posteo.de
Subject: Re: guix environment shebang interpreter
Date: Thu, 06 Feb 2020 11:37:53 +0100
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To: EuAndreh <eu@euandre.org>
Cc: Help-Guix <help-guix-bounces+mlell=posteo.de@gnu.org>, help-guix <Help-Guix@gnu.org>

Hi!

> Is there a Guix equivalent of the nix-shell shebang?
> 

You could imagine something like:

     #! /usr/bin/env guix environment --ad-hoc PKG1 PKG2 ... -- 
INTERPRETER


But alas,  on linux you cannot put more than one argument in the shebang 
line.

See this discussion: 
https://unix.stackexchange.com/questions/399690/multiple-arguments-in-shebang

But, one answer there has a possible solution for you: 
https://unix.stackexchange.com/a/399698

--8<-------------------------------------------------------
#!/bin/sh -

if [ "$1" != "--really" ]; then exec bash --posix -- "$0" --really "$@"; 
fi

shift

# Processing continues
----------------------------------------------->8-----------

It lets the script `exec` itself with the right arguments! So maybe put

     exec guix environment --ad-hoc PKG1 PKG2 ... -- INTERPRETER "$0" 
"$@"

there?


Cheers,
Moritz