ELisp finding files in Path

ELisp finding files in Path

[Paulo J. Matos]

Hi,

I would like to execute some commands in my .emacs only if there are
some files in the current PATH. The specific example is, I only want to
load a perforce library (p4.el) if I can find the executable p4 in the
path.

How can I do this? I couldn't find any way to either run a shell command
(through which I could run `which p4`), or read an environment variable
PATH, and then find all the files in it and see if p4 is there.

Any tips would be appreciated.

-- 
PMatos

Re: ELisp finding files in Path

[Eli Zaretskii]

> From: pocmatos@gmail.com (Paulo J. Matos)
> Date: Tue, 28 Sep 2010 11:10:12 +0100
> 
> I would like to execute some commands in my .emacs only if there are
> some files in the current PATH. The specific example is, I only want to
> load a perforce library (p4.el) if I can find the executable p4 in the
> path.
> 
> How can I do this?

Check out the executable-find function, it will return nil if it
doesn't find an executable program on PATH.

Re: ELisp finding files in Path

[Thierry Volpiatto]

pocmatos@gmail.com (Paulo J. Matos) writes:

> Hi,
>
> I would like to execute some commands in my .emacs only if there are
> some files in the current PATH. The specific example is, I only want to
> load a perforce library (p4.el) if I can find the executable p4 in the
> path.
>
> How can I do this? I couldn't find any way to either run a shell command
> (through which I could run `which p4`), or read an environment variable
> PATH, and then find all the files in it and see if p4 is there.
>
> Any tips would be appreciated.
(when (executable-find ...) (load ...)

-- 
A+ Thierry
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Re: ELisp finding files in Path

[Paulo J. Matos]

Eli Zaretskii <eliz@gnu.org> writes:

>
> Check out the executable-find function, it will return nil if it
> doesn't find an executable program on PATH.
>
>

woohoo, thanks!

-- 
PMatos