shell command output question

shell command output question

[Noel Yap]

I would like to have the following in my .emacs:
  (setq load-path (cons STUFF load-path))

where STUFF is the output of a command line.  Does
anyone know how I would be able to do this?

Thanks,
Noel

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Re: shell command output question

[Kalyan K. Mukherjea]

Hi Noel,
To output the result of a shell command into a buffer do;
\C-u \M-! command RETURN

Hope this helps.
Kalyan 

On Tue, 23 Apr 2002, Noel Yap wrote:

> I would like to have the following in my .emacs:
>   (setq load-path (cons STUFF load-path))
> 
> where STUFF is the output of a command line.  Does
> anyone know how I would be able to do this?
> 
> Thanks,
> Noel
> 
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> 

Re: shell command output question

[Noel Yap]

--- "Kalyan K. Mukherjea" <kalyan@isical.ac.in> wrote:
> Hi Noel,
> To output the result of a shell command into a
> buffer do;
> \C-u \M-! command RETURN

I apologize if my question wasn't clear enough.  I
would like to be able to use the output of a shell
command as input to a function in ~/.emacs.

Thanks,
Noel



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Re: shell command output question

[Niklas Morberg]

Noel Yap <yap_noel@yahoo.com> writes:

> I would like to have the following in my .emacs:
>   (setq load-path (cons STUFF load-path))
>
> where STUFF is the output of a command line.  Does
> anyone know how I would be able to do this?

shell-command-to-string might be your friend. Does this work?

(setq load-path (cons (shell-command-to-string
		       "your_command") load-path))

Niklas

Re: shell command output question

[Noel Yap]

--- Niklas Morberg <niklas.morberg@axis.com> wrote:
> Noel Yap <yap_noel@yahoo.com> writes:
> 
> > I would like to have the following in my .emacs:
> >   (setq load-path (cons STUFF load-path))
> >
> > where STUFF is the output of a command line.  Does
> > anyone know how I would be able to do this?
> 
> shell-command-to-string might be your friend. Does
> this work?
> 
> (setq load-path (cons (shell-command-to-string
> 		       "your_command") load-path))

It sort of does.  I just need to strip off the CR at
the end.  Would you happen to know how I can do that?

Thanks,
Noel


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RE: shell command output question

[Bingham, Jay]

The following will work as long as there is only one new line in the string and it is at the end of the string:

(setq load-path (cons (split-string (shell-command-to-string
	"your_command") "\n") load-path)))

From what you are trying to do I assume that "your command" will be something like "echo $PATH".  You can access environment variables with the command getenv

So you could accomplish the same with:

(setq load-path (cons (getenv "PATH") load-path)))


J_)
C_)ingham
.    COMPAQ NonStop Integrity Systems
.    Austin, TX
. Language is the apparel in which your thoughts parade in public.
. Never clothe them in vulgar and shoddy attire. -Dr. George W. Crane-

 -----Original Message-----
From: 	Noel Yap [mailto:yap_noel@yahoo.com] 
Sent:	Wednesday, 24 April, 2002 9:50 p
To:	Niklas Morberg
Cc:	help-gnu-emacs@gnu.org
Subject:	Re: shell command output question

--- Niklas Morberg <niklas.morberg@axis.com> wrote:
> Noel Yap <yap_noel@yahoo.com> writes:
> 
> > I would like to have the following in my .emacs:
> >   (setq load-path (cons STUFF load-path))
> >
> > where STUFF is the output of a command line.  Does
> > anyone know how I would be able to do this?
> 
> shell-command-to-string might be your friend. Does
> this work?
> 
> (setq load-path (cons (shell-command-to-string
> 		       "your_command") load-path))

It sort of does.  I just need to strip off the CR at
the end.  Would you happen to know how I can do that?

Thanks,
Noel


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Re: shell command output question

[G Anna]

> Date: Thu, 25 Apr 2002 11:50:27 -0500
> From: "Bingham, Jay" <Jay.Bingham@compaq.com>
> Subj: RE: shell command output question

(snip)

> From what you are trying to do I assume that "your command" will be
> something like "echo $PATH".  You can access environment variables
> with the command getenv

That is exactly the kind of question one should ask.  What are you
trying to achieve? (This question is to the OP.)  Instead of asking
something related to what you want, just ask what you want.  You would
probably get a more elegant solution.

Cheers,
anna

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Re: shell command output question

[Noel Yap]

--- G Anna <drguruolai@eth.net> wrote:
> 
> > Date: Thu, 25 Apr 2002 11:50:27 -0500
> > From: "Bingham, Jay" <Jay.Bingham@compaq.com>
> > Subj: RE: shell command output question
> 
> (snip)
> 
> > From what you are trying to do I assume that "your
> command" will be
> > something like "echo $PATH".  You can access
> environment variables
> > with the command getenv
> 
> That is exactly the kind of question one should ask.
>  What are you
> trying to achieve? (This question is to the OP.) 
> Instead of asking
> something related to what you want, just ask what
> you want.  You would
> probably get a more elegant solution.

OK.  Here it is.

I am running Cygwin on NT and I want to be able to use
the same .emacs on NT as on Unix.  Since emacs on NT
doesn't grok Cygwin paths, I need to convert the paths
passed into load-path into native paths.  So, I've
created a script on both Unix and NT that'll take a
path and convert it into a native path (on Unix, this
is just an echo; on NT it's just a cygpath -w). 
Ideally, I would have an emacs on NT that groks Cygwin
but I don't think that'll happen any time soon (last I
tried, emacs didn't build under Cygwin -- maybe it's
time to try again).

If anyone can suggest a better way to do this, I would
very much appreciate it.

Thanks,
Noel

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Re: shell command output question

[G Anna]

> Date: Fri, 26 Apr 2002 12:26:36 -0700 (PDT)
> From: Noel Yap <yap_noel@yahoo.com>
> Subj: Re: shell command output question

(snip)

> I am running Cygwin on NT and I want to be able to use the same
> .emacs on NT as on Unix.  Since emacs on NT doesn't grok Cygwin
> paths, I need to convert the paths passed into load-path into native
> paths.  So, I've created a script on both Unix and NT that'll take a
> path and convert it into a native path (on Unix, this is just an
> echo; on NT it's just a cygpath -w).  Ideally, I would have an emacs
> on NT that groks Cygwin but I don't think that'll happen any time
> soon (last I tried, emacs didn't build under Cygwin -- maybe it's
> time to try again).

Well, for GNU Emacs on Windows the mailing list is
help-emacs-windows@gnu.org; My suggestion is to just repost this mail
to that mailing list.  

I use GNU Emacs on Linux, so I cannot help you much there.  Sorry, I
couldn't be of more help.

Cheers,
anna

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