GNU Emacs 23.1 and Cygwin bash shell - cleaning up display

GNU Emacs 23.1 and Cygwin bash shell - cleaning up display

[Paul Bibbings]

Hi

I'm running GNU Emacs 23.1 built for Windows (on Vista) and I'm wanting
to use Cygwin bash as an alternative shell.  I'm trying out this
function from the Cygwin FAQ
(http://www.cygwin.com/faq/faq-nochunks.html#faq.using.ntemacs):

(defun my-bash (&optional buffer)
  "Run Cygwin Bash shell in optional BUFFER; default *shell-bash*."
  (autoload 'comint-check-proc "comint")
  (interactive
   (let ((name "*shell-bash*"))
     (if current-prefix-arg
    (setq name (read-string
           (format "Cygwin shell buffer (default %s): " name)
           (not 'initial-input)
           (not 'history)
           name)))
     (list name)))
  (or buffer
      (setq buffer "*shell-bash*"))
  (if (comint-check-proc buffer)
      (pop-to-buffer buffer)
    (let* ((shell-file-name            "bash")
      (explicit-shell-file-name   shell-file-name)
      (explicit-sh-args           '("--login" "-i"))
      (explicit-bash-args         explicit-sh-args)
      (w32-quote-process-args     ?\"));; Use Cygwin quoting rules.
      (shell buffer)
      ;;  By default Emacs sends "\r\n", but bash wants plain "\n"
      (set-buffer-process-coding-system 'undecided-dos 'undecided-unix)
      ;; With TAB completion, add slash path separator, none to filenames
      (make-local-variable 'comint-completion-addsuffix)
      (setq comint-completion-addsuffix '("/" . ""))
      ;;  This variable is local to buffer
      (setq comint-prompt-regexp "^[ \n\t]*[$] ?"))))

Now, this works fine in itself, but I'm experiencing the common problems
with how this displays with extra "noise."  As an example, if we take
the following, using the bash shell directly in a Windows console:

   c:\cygwin>cygwin.bat

   Me@MY ~
   $ pwd
   /home/Me

   Me@MY ~
   $

the equivalent in Emacs renders (After `M-x my-bash' && pwd) as:

   ^[]0;~^G
   ^[[32mMe@MY ^[[33m~^[[0m
   $ pwd
   /home/Me
   $[]0;~^G
   ^[]0;32mMe@MY ^[[33m~^[[0m
   $
   
... and that is a LOT of noise!

The encoding for *shell-bash* in this scenario shows as multi-byte
iso-latin-1-dos with DOS-style CRLF.

Any help in cleaning this up will be very much appreciated.

Regards

Paul Bibbings

Re: GNU Emacs 23.1 and Cygwin bash shell - cleaning up display

[Pascal J. Bourguignon]

Paul Bibbings <paul.bibbings@gmail.com> writes:

> the equivalent in Emacs renders (After `M-x my-bash' && pwd) as:
>
>    ^[]0;~^G
>    ^[[32mMe@MY ^[[33m~^[[0m
>    $ pwd
>    /home/Me
>    $[]0;~^G
>    ^[]0;32mMe@MY ^[[33m~^[[0m
>    $
>    
> ... and that is a LOT of noise!
>
> The encoding for *shell-bash* in this scenario shows as multi-byte
> iso-latin-1-dos with DOS-style CRLF.
>
> Any help in cleaning this up will be very much appreciated.

You may activate ansi-color.

    M-x ansi-color-for-comint-mode-on RET

(You may do that automatically in a hook).
However, this deals only with color escapes, not with positionning
escapes or others. 
To avoid these, you may change the prompt.
I use:

    export PS1='[\u@\h $DISPLAY \W]$ '

in my ~/.bashrc

-- 
__Pascal Bourguignon__

Re: GNU Emacs 23.1 and Cygwin bash shell - cleaning up display

[Paul Bibbings]

pjb@inf...com (Pascal J. Bourguignon) writes:
> Paul Bibbings <paul.bibbings@gmail.com> writes:
>
>> the equivalent in Emacs renders (After `M-x my-bash' && pwd) as:
>>
>>    ^[]0;~^G
>>    ^[[32mMe@MY ^[[33m~^[[0m
>>    $ pwd
>>    /home/Me
>>    $[]0;~^G
>>    ^[]0;32mMe@MY ^[[33m~^[[0m
>>    $
>>    
>> ... and that is a LOT of noise!
>>
>> The encoding for *shell-bash* in this scenario shows as multi-byte
>> iso-latin-1-dos with DOS-style CRLF.
>>
>> Any help in cleaning this up will be very much appreciated.
>
> You may activate ansi-color.
>
>     M-x ansi-color-for-comint-mode-on RET
>
> (You may do that automatically in a hook).
> However, this deals only with color escapes, not with positionning
> escapes or others. 
> To avoid these, you may change the prompt.
> I use:
>
>     export PS1='[\u@\h $DISPLAY \W]$ '
>
> in my ~/.bashrc

This is great, Pascal.  Thanks for this.  I have managed to get rid of
the noise and, also, it triggered me to discover that, having recently
moved my HOME directory, I had actually omitted to move over my
.bashrc.  Having done so, and made a few modifications, I'm good now!

Regards

Paul Bibbings

RE: GNU Emacs 23.1 and Cygwin bash shell - cleaning up display

[KARR, DAVID (ATTSI)]

> -----Original Message-----
> From: help-gnu-emacs-bounces+dk068x=att.com@gnu.org [mailto:help-gnu-
> emacs-bounces+dk068x=att.com@gnu.org] On Behalf Of Paul Bibbings
> Sent: Sunday, February 28, 2010 11:17 AM
> To: help-gnu-emacs@gnu.org
> Subject: Re: GNU Emacs 23.1 and Cygwin bash shell - cleaning up
display
> 
> pjb@inf...com (Pascal J. Bourguignon) writes:
> > Paul Bibbings <paul.bibbings@gmail.com> writes:
> >
> >> the equivalent in Emacs renders (After `M-x my-bash' && pwd) as:
> >>
> >>    ^[]0;~^G
> >>    ^[[32mMe@MY ^[[33m~^[[0m
> >>    $ pwd
> >>    /home/Me
> >>    $[]0;~^G
> >>    ^[]0;32mMe@MY ^[[33m~^[[0m
> >>    $
> >>
> >> ... and that is a LOT of noise!

You can create a $HOME/.emacs_bash file, which is used for alternative
settings with Bash in Emacs.  With this, you can set a different prompt
in Emacs than outside of Emacs.

> >>
> >> The encoding for *shell-bash* in this scenario shows as multi-byte
> >> iso-latin-1-dos with DOS-style CRLF.
> >>
> >> Any help in cleaning this up will be very much appreciated.
> >
> > You may activate ansi-color.
> >
> >     M-x ansi-color-for-comint-mode-on RET
> >
> > (You may do that automatically in a hook).
> > However, this deals only with color escapes, not with positionning
> > escapes or others.
> > To avoid these, you may change the prompt.
> > I use:
> >
> >     export PS1='[\u@\h $DISPLAY \W]$ '
> >
> > in my ~/.bashrc
> 
> This is great, Pascal.  Thanks for this.  I have managed to get rid of
> the noise and, also, it triggered me to discover that, having recently
> moved my HOME directory, I had actually omitted to move over my
> .bashrc.  Having done so, and made a few modifications, I'm good now!
> 
> Regards
> 
> Paul Bibbings

Re: GNU Emacs 23.1 and Cygwin bash shell - cleaning up display

[J. David Boyd]

"KARR, DAVID (ATTSI)" <dk068x@att.com> writes:

Creating my own .emacs_bash file is exactly what I did.  Looks like
this:

-------------------------------------------

. ~/.bashrc


PS1='\[\e[34m\]\u@\h \[\e[35m\]\w\[\e[0m\]\n\$ '
export PS1

-------------------------------------------

Works great too!