executing bash function with shell-command

executing bash function with shell-command

[mvar]

Hello,

Apologies if this has been asked before, i couldn't find something relevant
in the archives!
I've been trying to setup a lisp function in emacs (24.5.1)  that executes
an external bash function defined in my .bashrc file (or even .emacs_bash).
If i open the shell directly from within emacs and type the function in there
it works, but if i call it with "shell-command" i get a "command not found" error.
A workaround is to run shell-command with "source ~/.emacs-bash && function_name".
Am i doing something horribly wrong?

another question, is it viable to create some function/script in Lisp
that for example will ssh to a remote machine, execute some pre-defined
commands and log-off ? The only relevant info i've found so far is for
remote editing with tramp.

thanks,
Michael

Re: executing bash function with shell-command

[Emanuel Berg]

mvar <mvar.40k@gmail.com> writes:

> I've been trying to setup a lisp function in emacs
> (24.5.1) that executes an external bash function
> defined in my .bashrc file (or even .emacs_bash).
> If i open the shell directly from within emacs and
> type the function in there it works, but if i call
> it with "shell-command" i get a "command not
> found" error.

It is because when you open bash from Emacs bash is
the interactive shell. When you open Emacs from bash
Emacs talks to a non-interactive bash where BASH_ENV
is the only thing that is sourced. (Or so I've heard -
I don't use bash myself - I use zsh, where you solve
this by putting shared stuff in .zshenv)

So try putting the shared file path in BASH_ENV, or
you can even try:

    BASH_ENV=~/.bashrc emacs

The the distinction interactive/non-interactive gets
foggy but I suppose your computer won't blow up.

> A workaround is to run shell-command with "source
> ~/.emacs-bash && function_name".

Indeed, the material is not read is the problem.

> another question, is it viable to create some
> function/script in Lisp that for example will ssh to
> a remote machine, execute some pre-defined commands
> and log-off ? The only relevant info i've found so
> far is for remote editing with tramp.

Yes, you can do that.

-- 
underground experts united
http://user.it.uu.se/~embe8573

Re: executing bash function with shell-command

[Emanuel Berg]

Emanuel Berg <embe8573@student.uu.se> writes:

> It is because when you open bash from Emacs bash is
> the interactive shell. When you open Emacs from bash
> Emacs talks to a non-interactive bash where BASH_ENV
> is the only thing that is sourced. (Or so I've heard
> - I don't use bash myself - I use zsh, where you
> solve this by putting shared stuff in .zshenv)
>
> So try putting the shared file path in BASH_ENV, or
> you can even try:
>
>     BASH_ENV=~/.bashrc emacs

Yes, this works for me even tho I'm on zsh.

In ~/.bashrc put this, carefully, as bash is fussy!

    function hi () {
        echo hello
    }

Then invoke Emacs like this:

    SHELL=/bin/bash BASH_ENV=~/.bashrc emacs -Q

Then:

    M-x shell-command RET hi RET

N.B. Don't rely on SHELL if you want to change the
shell in general. 

-- 
underground experts united
http://user.it.uu.se/~embe8573

Re: executing bash function with shell-command

[mvar]

> Emanuel Berg <embe8573@student.uu.se> writes:
> 
> Yes, this works for me even tho I'm on zsh.
> 
> In ~/.bashrc put this, carefully, as bash is fussy!
> 
>     function hi () {
>         echo hello
>     }
> 
> Then invoke Emacs like this:
> 
>     SHELL=/bin/bash BASH_ENV=~/.bashrc emacs -Q
> 
> Then:
> 
>     M-x shell-command RET hi RET
> 
> N.B. Don't rely on SHELL if you want to change the
> shell in general. 
> 
> -- 
> underground experts united
> http://user.it.uu.se/~embe8573

hello Emanuel,

yes this works perfectly fine and even with --daemon!

many thanks!



Michael

Re: executing bash function with shell-command

[Emanuel Berg]

mvar <mvar.40k@gmail.com> writes:

> yes this works perfectly fine and even with
> --daemon!
>
> many thanks!

My pleasure!

-- 
underground experts united
http://user.it.uu.se/~embe8573