default pipe

default pipe

[GoTaR]

Hi!

Is it possible somehow to set default pipe command? E.g.

$ ls | <enter>

to be executed as

$ ls | less <enter>

TIA

-- 
GoTaR <priv0.onet.pl->gotar>        http://vfmg.sourceforge.net/
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Re: default pipe

[Bart Schaefer]

On Jul 25,  4:57pm, GoTaR wrote:
}
} Is it possible somehow to set default pipe command?

Well, it's possible *somehow* but ...

} $ ls | <enter>

This is syntactically incomplete, so zsh is going to print the PS2
prompt and wait for you to enter another command.  In most cases I
think this is what you'd want.

The only way to subvert this is to hack the accept-line ZLE widget:

function accept-pipe-as-terminator {
   setopt localoptions extendedglob
   if [[ "$BUFFER" = *\|[[:space:]]# ]]
   then
      # in 4.2.x and later, use BUFFER+=less
      BUFFER="$BUFFER less"
   fi
   zle .accept-line
}
zle -N accept-line accept-pipe-as-terminator

Re: default pipe

[GoTaR]

On Mon, Jul 25, 2005 at 17:28:14 +0000, Bart Schaefer wrote:

> } $ ls | <enter>
> 
> This is syntactically incomplete, so zsh is going to print the PS2
> prompt and wait for you to enter another command.  In most cases I
> think this is what you'd want.

Actually I always finish pipes in a line, so it's never what I want;]

> The only way to subvert this is to hack the accept-line ZLE widget:
[...]
> zle -N accept-line accept-pipe-as-terminator

Works perfect:) Thanks!

-- 
GoTaR <priv0.onet.pl->gotar>        http://vfmg.sourceforge.net/
                                    http://tccs.sourceforge.net/

Re: default pipe

[zzapper]

On Mon, 25 Jul 2005 16:57:37 +0200,  wrote:

>Hi!
>
>Is it possible somehow to set default pipe command? E.g.
>
>$ ls | <enter>
>
>to be executed as
>
>$ ls | less <enter>
>
>TIA

alias -g L=' | less'

ls L

(dunno if that's what you want!)


-- 
zzapper
vim -c ":%s%s*%Cyrnfr)fcbafbe[Oenz(Zbbyranne%|:%s)[[()])-)Ig|norm Vg?"
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Re: default pipe

[Wayne Davison]

On Mon, Jul 25, 2005 at 06:29:41PM +0100, zzapper wrote:
> alias -g L=' | less'

I too have some global aliases for simple pipe commands, but I have
found it a little safer to use a short string of characters that is
more unlikely to ever be a filename than a single capital letter.
I have these that use a leading comma:

alias -g ,e='|egrep' ,f='|fgrep' ,g='|grep'
alias -g ,h='|head'  ,t='|tail'  ,w='|wc'
alias -g ,l='|less'  ,x='|xargs'

I also have a second version of each of those aliases that combines
stderr and stdout into the pipe, such as this one for less:

alias -g ,,l='|&less'

Yes, it does mean you need to type a space before the global alias, but
I always typed a space before a "|" anyway, so that doesn't bother me.

..wayne..

Re: default pipe

[zzapper]

On Mon, 25 Jul 2005 12:23:30 -0700,  wrote:

>On Mon, Jul 25, 2005 at 06:29:41PM +0100, zzapper wrote:
>> alias -g L=' | less'
>
>I too have some global aliases for simple pipe commands, but I have
>found it a little safer to use a short string of characters that is
>more unlikely to ever be a filename than a single capital letter.
>I have these that use a leading comma:
>
>alias -g ,e='|egrep' ,f='|fgrep' ,g='|grep'
>alias -g ,h='|head'  ,t='|tail'  ,w='|wc'
>alias -g ,l='|less'  ,x='|xargs'
>
>I also have a second version of each of those aliases that combines
>stderr and stdout into the pipe, such as this one for less:
>
>alias -g ,,l='|&less'
>
>Yes, it does mean you need to type a space before the global alias, but
>I always typed a space before a "|" anyway, so that doesn't bother me.
>
Wayne,
never thought to use a sequence ,x etc good idea. I have a convention to use uppercase for Global
Aliases don't know if that's my idea or is general.

-- 
zzapper
vim -c ":%s%s*%Cyrnfr)fcbafbe[Oenz(Zbbyranne%|:%s)[[()])-)Ig|norm Vg?"
http://www.rayninfo.co.uk/tips/ vim, zsh & success tips

Re: default pipe

[Vincent Lefevre]

On 2005-07-25 20:35:20 +0100, zzapper wrote:
> never thought to use a sequence ,x etc good idea. I have a
> convention to use uppercase for Global Aliases don't know if that's
> my idea or is general.

Wouldn't a method based on bindkey (to insert some string) be safer?

-- 
Vincent Lefèvre <vincent@vinc17.org> - Web: <http://www.vinc17.org/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/>
Work: CR INRIA - computer arithmetic / SPACES project at LORIA

Re: default pipe

[DervishD]

    Hi Vincent :)

 * Vincent Lefevre <vincent@vinc17.org> dixit:
> On 2005-07-25 20:35:20 +0100, zzapper wrote:
> > never thought to use a sequence ,x etc good idea. I have a
> > convention to use uppercase for Global Aliases don't know if that's
> > my idea or is general.
> Wouldn't a method based on bindkey (to insert some string) be safer?

    I don't know if it is safer, but I prefer it. That's the way I
have all my 'special' pipe commands implemented.

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
http://www.pleyades.net & http://www.gotesdelluna.net
It's my PC and I'll cry if I want to...

Re: default pipe

[Oliver Kiddle]

Wayne Davison wrote:

> I too have some global aliases for simple pipe commands, but I have
> found it a little safer to use a short string of characters that is
> more unlikely to ever be a filename than a single capital letter.
> I have these that use a leading comma:
> 
> alias -g ,e='|egrep' ,f='|fgrep' ,g='|grep'

I tend to prefer bindkey -s instead of global aliases for such
sequences. It has the advantage that it is expanded so you can see what
it is going to do.

Oliver


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Re: default pipe

[Wayne Davison]

On Wed, Jul 27, 2005 at 07:35:06PM +0200, Oliver Kiddle wrote:
> I tend to prefer bindkey -s instead of global aliases for such
> sequences. It has the advantage that it is expanded so you can see
> what it is going to do.

I much prefer the global aliases because they take up less room on the
line, are easier to edit (since they remain short), and I like them
unexpanded in the history.  To each his own.

..wayne..

Re: default pipe

[DervishD]

    Hi GoTaR :)

 * GoTaR <gotar@poczta.onet.pl> dixit:
> Is it possible somehow to set default pipe command? E.g.
> 
> $ ls | <enter>
> 
> to be executed as
> 
> $ ls | less <enter>

    Not exactly what you want, but I have my useless Windoze keys
mapped to that. When I hit my 'menu' key, "| less <enter>" is
automatically entered in the command line. Is very easy if you use
Linux: just add a string to the key you want to do the dirty job and
after that 'bindkey' that string to the command you want to be
automatically entered. That's all.

    If you use Linux and a Windoze keyboard, I can post you the
things you need to add to your keymap and zshenv/zshrc files.

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
http://www.pleyades.net & http://www.gotesdelluna.net
It's my PC and I'll cry if I want to...