From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Using 'system*' instead of 'system' in 'guix environment'
Date: Thu, 08 Oct 2015 16:59:56 +0200
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	(David Thompson's message of "Thu, 8 Oct 2015 08:41:17 -0400")
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To: "Thompson, David" <dthompson2@worcester.edu>
Cc: guix-devel <guix-devel@gnu.org>

"Thompson, David" <dthompson2@worcester.edu> skribis:

> I disagree, and here's why.  Going back to the sudo/ssh example, it's
> not possible to do 'cd /bar; frob' naively because this...
>
>     sudo cd /bar; frob
>
> ...is two commands.  And this doesn't work either because it's not a
> valid string for exec:
>
>     sudo 'cd /bar; frob'
>
> However, we can just do the 'sh -c' trick!
>
>     sudo sh -c 'cd /bar; frob'
>
> This is essentially what you propose having built-in, but I think it
> would be best to leave it out.  That way we can simply use 'system*'
> and users that want to execute an inline Bash script can do so using
> the method they most likely already know about from tools like sudo
> and ssh.
>
>     guix environment --ad-hoc guile -- guile -c '(frob)'
>
>     guix environment --ad-hoc guile -- sh -c "cd bar/; guile -c '(frob)'"
>
> This has the additional advantage that the first process created
> inside containers will be PID 1, not 2.
>
> Does this counter-proposal sound OK?

Yes it does; you win.  ;-)

I guess we must still support -E for compatibility.  Probably it should
do an implicit =E2=80=98sh -c=E2=80=99?

Thanks,
Ludo=E2=80=99.