Executing init script after launching eshell

Executing init script after launching eshell

[C K Kashyap]

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Hi All,

Here's what I'd like to be doing - When I start emacs, I typically open up
multiple eshells to do different kinds of compilation etc. Is there  a way
to retain the "session" in such a manner that all open eshells are also
retained.

As a workaround I was attempting to write a script that would open up the
necessary eshells -

(progn
   (eshell)
   (rename-buffer "b1")
    (insert "cd path1\n")
    (eshell)
   (rename-buffer "b2")
    (insert "cd path2\n")
)
The problem is that I am not able to cd into the right place in eshell
using (insert "cd path1\n") !!!

Regards,
Kashyap

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Re: Executing init script after launching eshell

[Tom Willemsen]

Hey Kashyap,

On Tue 27 Mar 2012 09:58:46 AM CEST, C K Kashyap wrote:

 > Hi All,
 >
 > Here's what I'd like to be doing - When I start emacs, I typically open up
 > multiple eshells to do different kinds of compilation etc. Is there  a way
 > to retain the "session" in such a manner that all open eshells are also
 > retained.
 >
 > As a workaround I was attempting to write a script that would open up the
 > necessary eshells -
 >
 > (progn
 >    (eshell)
 >    (rename-buffer "b1")
 >     (insert "cd path1\n")
 >     (eshell)
 >    (rename-buffer "b2")
 >     (insert "cd path2\n")
 > )

Maybe the following could work, it seems to do what you want when I try
it here.

(progn
  (let ((default-directory "path1"))
    (eshell t)
    (rename-buffer "b1"))
  (let ((default-directory "path2"))
    (eshell t)
    (rename-buffer "b2")))

I don't know if using `default-directory' like that is such a great
idea, but it looks slightly better than the result of:

(progn
  (eshell t)
  (eshell/cd "path1")
  (eshell-send-input)
  (eshell t)
  (eshell/cd "path2")
  (eshell-send-input))
 
 > The problem is that I am not able to cd into the right place in eshell
 > using (insert "cd path1\n") !!!

That seems to be because you don't use `eshell-send-input'

Hope it helps in some small way.             

Re: Executing init script after launching eshell

[C K Kashyap]

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Thanks Tom

Maybe the following could work, it seems to do what you want when I try
> it here.
>
> (progn
>  (let ((default-directory "path1"))
>    (eshell t)
>    (rename-buffer "b1"))
>  (let ((default-directory "path2"))
>    (eshell t)
>    (rename-buffer "b2")))
>
>
This is a working solution for me.


> (progn
>  (eshell t)
>  (eshell/cd "path1")
>  (eshell-send-input)
>  (eshell t)
>  (eshell/cd "path2")
>  (eshell-send-input))
>
>
The above snippet does not seem to work for me. Could you please explain
the below lines ?

 (eshell t) -> This opens up a new eshell
 (eshell/cd "path1") - ?????
 (eshell-send-input) - I am guessing the command in the previous step gets
passed on using this command.


> Hope it helps in some small way.
>

Absolutely helps!!!

Regards,
Kashyap

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Re: Executing init script after launching eshell

[Tom Willemsen]

Hey Kashyap,

On Tue 27 Mar 2012 12:26:37 PM CEST, C K Kashyap wrote:

 > Thanks Tom
 >
 > Maybe the following could work, it seems to do what you want when I try
 > > it here.
 > >
 > > (progn
 > >  (let ((default-directory "path1"))
 > >    (eshell t)
 > >    (rename-buffer "b1"))
 > >  (let ((default-directory "path2"))
 > >    (eshell t)
 > >    (rename-buffer "b2")))
 > >
 > >
 > This is a working solution for me.

Excellent!

 > > (progn
 > >  (eshell t)
 > >  (eshell/cd "path1")
 > >  (eshell-send-input)
 > >  (eshell t)
 > >  (eshell/cd "path2")
 > >  (eshell-send-input))
 > >
 > >
 > The above snippet does not seem to work for me. Could you please explain
 > the below lines ?
 >
 >  (eshell t) -> This opens up a new eshell
 >  (eshell/cd "path1") - ?????
 >  (eshell-send-input) - I am guessing the command in the previous step gets
 > passed on using this command.

The `eshell/cd' function is what is executed when you type 'cd' into
eshell, unless you have changed this. It doesn't change what you see in
eshell though, so the `eshell-send-input' should send an empty command,
which resets the eshell prompt and should show you that it's actually in
the right directory. Perhaps I got it wrong here, I use `eshell-reset'
in one of my keybindings, but I though send-input was perhaps clearer to
use here, sorry.

It also doesn't rename the buffers, so it was wrong anyway, I only know
that just sending a `\n' character to an eshell buffer doesn't execute
the command, but `eshell-send-input' does, or should. At least that's
what I noticed when messing around with sending commands
programmatically.

 > > Hope it helps in some small way.
 > >
 >
 > Absolutely helps!!!

Awesome!

Regards,
Tom

Re: Executing init script after launching eshell

[C K Kashyap]

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Thanks a lot Tom,

The `eshell/cd' function is what is executed when you type 'cd' into

> eshell, unless you have changed this. It doesn't change what you see in
> eshell though, so the `eshell-send-input' should send an empty command,
>
>
Oh, I now get the use of (eshell-send-input) ... I can even do
(progn
  (eshell t)
  (insert "cd /Users/kck")
  (eshell-send-input)
  )

Regards,
Kashyap

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