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Subject: |
Eshell doesn't handle ANSI escapes/colors well |
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Date: |
Sun, 2 May 2010 20:54:46 -0700 |
>From Emacs bzr HEAD:
Eshell doesn't handle a terminal escape code like ^[.
My eshell-output-filter-functions:
'(eshell-output-filter-functions (quote (eshell-handle-ansi-color
eshell-handle-control-codes eshell-watch-for-password-prompt
eshell-postoutput-scroll-to-bottom)))
Example:
[~/emacs.20100501/lisp/eshell]$ export TERM=xterm-256color
[~/emacs.20100501/lisp/eshell]$ *grep --color=auto ansi esh-*
^[[Kesh-mode.el^[[K^[[K:^[[K eshell-handle-^[[Kansi^[[K-color
^[[Kesh-mode.el^[[K^[[K:^[[K(autoload
'^[[Kansi^[[K-color-apply-on-region "^[[Kansi^[[K-color")
^[[Kesh-mode.el^[[K^[[K:^[[K(defun eshell-handle-^[[Kansi^[[K-color ()
^[[Kesh-mode.el^[[K^[[K:^[[K (^[[Kansi^[[K-color-apply-on-region
eshell-last-output-start
^[[Kesh-mode.el^[[K^[[K:^[[K 'eshell-handle-^[[Kansi^[[K-color)
^[[Kesh-var.el^[[K^[[K:^[[K;; is identical to just saying (lisp); but
with the variable exp^[[Kansi^[[Kon
`term-handle-ansi-escape' from term.el seems to be be handling
ansi escapes very well. Maybe we can integrate a modified
version of it into Eshell.
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--- Begin Message ---
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Subject: |
Re: Eshell doesn't handle ANSI escapes/colors well |
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Date: |
Sat, 29 May 2010 14:29:22 -0400 |
>> Eshell doesn't handle a terminal escape code like ^[.
>>
>> [~/emacs.20100501/lisp/eshell]$ export TERM=xterm-256color
>> [~/emacs.20100501/lisp/eshell]$ *grep --color=auto ansi esh-*
>> ^[[Kesh-mode.el^[[K^[[K:^[[K eshell-handle-^[[Kansi^[[K-color
>
> This was working some time ago so maybe looking at what have changed and
> reenable this feature should be good.
No, this is not a regression. The mess here is due to the ^[[K ("erase
line") sequence that colorized grep emits. (I don't know why it needs
this control sequence.)
There is no sane way for the ansi-color package to handle this. Unlike
term.el, it is not intended to be a terminal emulator. The best we can
do is to delete such sequences from the output, and I've committed a
change to do that.
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