Re: Wrapper for the GNU 'which' command

Re: Wrapper for the GNU 'which' command

[yonirabkin]

Kevin Rodgers wrote:
> Yoni Rabkin Katzenell wrote:
>  > This is a wrapper around the GNU 'which' command that I have found
>  > very useful when writing Emacs Lisp code which calls processes.
The
>  > function expects a name of a command as a string and returns true
if
>  > that command exists.
>
> ,----[ C-h f executable-find RET ]
> | executable-find is a compiled Lisp function in `executable'.
> | (executable-find COMMAND)
> |
> | Search for COMMAND in exec-path and return the absolute file name.
> | Return nil if COMMAND is not found anywhere in `exec-path'.
> `----
> 
> -- 
> Kevin Rodgers

When does emacs create `exec-path'?

Re: Wrapper for the GNU 'which' command

[Kevin Rodgers]

yonirabkin@gmail.com wrote:
 > Kevin Rodgers wrote:
 >>,----[ C-h f executable-find RET ]
 >>| executable-find is a compiled Lisp function in `executable'.
 >>| (executable-find COMMAND)
 >>|
 >>| Search for COMMAND in exec-path and return the absolute file name.
 >>| Return nil if COMMAND is not found anywhere in `exec-path'.
 >>`----
 >
 > When does emacs create `exec-path'?

At startup, it is initialized from the PATH and EMACSPATH (or a default
directory) environment variables.

You can get executable-find to search whatever path you want by
temporarily binding exec-path e.g.

(let ((exec-path (parse-colon-path (getenv "FOOPATH"))))
   (executable-find "foo"))

-- 
Kevin Rodgers