Re: bash scripts in Guix question

[Olivier Dion via]

On Wed, 05 Oct 2022, Maxim Cournoyer  wrote:
> Hi,
>
> Olivier Dion  writes:
>
> [...]
>
>>> I prefer the "#!/usr/bin/env bash" shebang; /usr/bin/env is available on
>>> FHS distribution, and on Guix System, for convenience.  You can use if
>>> for any interpreted script, such as Guile, Python, Perl, etc.
>>
>> Only if coreutils is in the profile that would work yes.
>
> coreutils doesn't need to be in the profile since /usr/bin/env is linked
> to (file-append coreutils "bin/env"); see in the value of %base-services
> in (gnu services base), which contains:
>
> --8<---cut here---start->8---
> (service special-files-service-type
>  `(("/bin/sh" ,(file-append bash "/bin/sh"))
>("/usr/bin/env" ,(file-append coreutils "/bin/env"
> --8<---cut here---end--->8---

Oh interesting I did not know that.  Thank you!

-- 
Olivier Dion
oldiob.dev

Re: bash scripts in Guix question

[Maxim Cournoyer]

Hi,

Olivier Dion  writes:

[...]

>> I prefer the "#!/usr/bin/env bash" shebang; /usr/bin/env is available on
>> FHS distribution, and on Guix System, for convenience.  You can use if
>> for any interpreted script, such as Guile, Python, Perl, etc.
>
> Only if coreutils is in the profile that would work yes.

coreutils doesn't need to be in the profile since /usr/bin/env is linked
to (file-append coreutils "bin/env"); see in the value of %base-services
in (gnu services base), which contains:

--8<---cut here---start->8---
(service special-files-service-type
 `(("/bin/sh" ,(file-append bash "/bin/sh"))
   ("/usr/bin/env" ,(file-append coreutils "/bin/env"
--8<---cut here---end--->8---
   

'env' looks up the command passed to it from PATH, but that's usually
satisfied if you were going to use a FHS location anyway such as
"/bin/bash".

-- 
Thanks,
Maxim

Re: bash scripts in Guix question - suspend ?

[Tobias Geerinckx-Rice]

Hi jordi,

>I'm puzzled, as long as   'loginctl suspend' is working in the shell

But '~/.config/i3/i3exit loginctl suspend' isn't.

Judging by your original snippet, you've mashed two commands together: you 
meant either

  ~/.config/i3/i3exit suspend

or

  loginctl suspend

But nobody here can tell you for certain how to call your 'i3exit' script 
without knowing what's in it.

Aside: you seem to be writing a wrapper script to wrap a wrapper script to call 
a wrapper for writing to /proc.  Is that necessary?  It can make things hard to 
follow.


Kind regards,

T G-R

Sent on the go.  Excuse or enjoy my brevity.

Re: bash scripts in Guix question

[Olivier Dion via]

On Tue, 04 Oct 2022, Maxim Cournoyer  wrote:
> Hi,
>
> Olivier Dion via  writes:
>
>> On Tue, 04 Oct 2022, jordi  wrote:
>>> Hi guixers,
>>>
>>> i'm wondering...for my scripts to work in Guix, instead of
>>>  '#!/bin/bash' , 
>>>
>>
>> Typically the `sh' program should be a symlinked to `bash' in your
>> system profile.  I think it is the case for many distro.  If you want it
>> to be bulletproof though for other distros maybe something like that:
>>
>> #!/bin/sh
>> if [ "$(basename $SHELL)" != "bash" ]; then
>>   exec bash "$0" "$@"
>> fi
>>
>> echo "hey!"
>
> I prefer the "#!/usr/bin/env bash" shebang; /usr/bin/env is available on
> FHS distribution, and on Guix System, for convenience.  You can use if
> for any interpreted script, such as Guile, Python, Perl, etc.

Only if coreutils is in the profile that would work yes.

-- 
Olivier Dion
oldiob.dev

Re: bash scripts in Guix question

[Maxim Cournoyer]

Hi,

Olivier Dion via  writes:

> On Tue, 04 Oct 2022, jordi  wrote:
>> Hi guixers,
>>
>> i'm wondering...for my scripts to work in Guix, instead of
>>  '#! /bin/bash' , 
>>
>
> Typically the `sh' program should be a symlinked to `bash' in your
> system profile.  I think it is the case for many distro.  If you want it
> to be bulletproof though for other distros maybe something like that:
>
> #!/bin/sh
> if [ "$(basename $SHELL)" != "bash" ]; then
>   exec bash "$0" "$@"
> fi
>
> echo "hey!"

I prefer the "#!/usr/bin/env bash" shebang; /usr/bin/env is available on
FHS distribution, and on Guix System, for convenience.  You can use if
for any interpreted script, such as Guile, Python, Perl, etc.

-- 
Thanks,
Maxim

Re: bash scripts in Guix question

[Fulbert]

Le Tue, Oct 04, 2022 at 03:18:36PM +0200, jordi a écrit :
> Hi guixers,
Hello!
> 
> i'm wondering...for my scripts to work in Guix, instead of
>  '#!  /bin/bash' , 
> 
> what do i have to start them with ? 
  
  #!/usr/bin/env bash

And if you need to pass arguments/options, take a look at

  $ info '(coreutils) env invocation'

> Thanks,thanks, thanks

Welcome!

Re: bash scripts in Guix question

[Olivier Dion via]

On Tue, 04 Oct 2022, jordi  wrote:
> Hi guixers,
>
> i'm wondering...for my scripts to work in Guix, instead of
>  '#!  /bin/bash' , 
>

Typically the `sh' program should be a symlinked to `bash' in your
system profile.  I think it is the case for many distro.  If you want it
to be bulletproof though for other distros maybe something like that:
--8<---cut here---start->8---
#!/bin/sh
if [ "$(basename $SHELL)" != "bash" ]; then
  exec bash "$0" "$@"
fi

echo "hey!"
--8<---cut here---end--->8---

-- 
Olivier Dion
oldiob.dev

Re: bash scripts in Guix question

[Ekaitz Zarraga]

Hi,

> Hi guixers,
> 
> i'm wondering...for my scripts to work in Guix, instead of
> '#! /bin/bash' ,
> 
> what do i have to start them with ?
> 
> Thanks,thanks, thanks
> 
> F

We have a link to bash located in /bin/sh so you can just leave /bin/sh. Or you 
can also use `#!/usr/bin/env bash`

Both should work.

Cheers,
Ekaitz

bash scripts in Guix question

[jordi]

Hi guixers,

i'm wondering...for my scripts to work in Guix, instead of
 '#!/bin/bash' , 

what do i have to start them with ? 

Thanks,thanks, thanks

F