alias vl="vi !$"

alias vl="vi !$"

[zzapper]

Hi,
I've often wanted to have aliases such

alias vl="vi !$" where !$ is the command line "last parameter"

Doesn't work though, is there any way to do this kind of thing?

zzapper (vim & cygwin & zsh)
--

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Re: alias vl="vi !$"

[James Devenish]

In message <65a050lf2u4bjch4u2uv68q56u5co0gknp@4ax.com>
on Thu, Mar 11, 2004 at 08:59:16AM +0000, zzapper wrote:
> alias vl="vi !$" where !$ is the command line "last parameter"
> 
> Doesn't work though, is there any way to do this kind of thing?

Make your own 'function' named `vl`?

Re: alias vl="vi !$"

[zzapper]

On Thu, 11 Mar 2004 17:10:03 +0800, James Devenish 
>on Thu, Mar 11, 2004 at 08:59:16AM +0000, zzapper wrote:
>> alias vl="vi !$" where !$ is the command line "last parameter"
>> 
>> Doesn't work though, is there any way to do this kind of thing?
>
>Make your own 'function' named `vl`?
>
>
Do I have access to the positional parameters of the previous command
line /history from inside a function?

zzapper (vim & cygwin & zsh)
--

vim -c ":%s/^/WhfgTNabgureRIvzSUnpxre/|:%s/[R-T]/ /Ig|:normal ggVGg?"

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Re: alias vl="vi !$"

[Peter Stephenson]

zzapper wrote:
> Do I have access to the positional parameters of the previous command
> line /history from inside a function?

You'll have to be more specific.  Tell us exactly what you're trying to
do and it will avoid all these guessing games...



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Re: alias vl="vi !$"

[zzapper]

On Thu, 11 Mar 2004 12:33:55 +0000, Peter Stephenson  wrote:

On the command prompt line I'm often typing say

>ll fred.txt
>vi !$

Now I'd like to have an alias/function called say vl (vi last)

>vl

Which would save me typing vi !$ (my poor little fingers!), for that
to work vl would need to access the line history

zzapper (vim & cygwin & zsh)
--

vim -c ":%s/^/WhfgTNabgureRIvzSUnpxre/|:%s/[R-T]/ /Ig|:normal ggVGg?"

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Re: alias vl="vi !$"

[Thomas Köhler]

[-- Attachment #1: Type: text/plain, Size: 910 bytes --]

Hi,

zzapper wrote:
> On Thu, 11 Mar 2004 12:33:55 +0000, Peter Stephenson  wrote:
> 
> On the command prompt line I'm often typing say
> 
> >ll fred.txt
> >vi !$
> 
> Now I'd like to have an alias/function called say vl (vi last)
> 
> >vl
> 
> Which would save me typing vi !$ (my poor little fingers!), for that
> to work vl would need to access the line history

accept-line-or-empty-cmd() {
    if [ "$LBUFFER$RBUFFER"  = vl ] ; then
        LBUFFER="vi !$"
        RBUFFER=""
    fi
    builtin zle .accept-line
}
zle -N accept-line-or-empty-cmd
bindkey "^M" accept-line-or-empty-cmd

Fun with widgets :)

Ciao,
Thomas

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 Thomas Köhler       Email:       jean-luc@picard.franken.de
     <><             WWW:           http://jeanluc-picard.de
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Re: alias vl="vi !$"

[zzapper]

On Thu, 11 Mar 2004 08:59:16 +0000,  wrote:

>Hi,
>I've often wanted to have aliases such
>
>alias vl="vi !$" where !$ is the command line "last parameter"
>
Tejmo emailed me this solution which works!!

vl () {
        gvim.exe $(history -1 | sed "s/.* //g")
}


zzapper (vim & cygwin & zsh)
--

vim -c ":%s/^/WhfgTNabgureRIvzSUnpxre/|:%s/[R-T]/ /Ig|:normal ggVGg?"

http://www.vim.org/tips/tip.php?tip_id=305  Best of Vim Tips

Re: alias vl="vi !$"

[Bart Schaefer]

On Mar 11, 12:26pm, zzapper wrote:
> Subject: Re: alias vl="vi !$"
>
> On Thu, 11 Mar 2004 17:10:03 +0800, James Devenish 
> >on Thu, Mar 11, 2004 at 08:59:16AM +0000, zzapper wrote:
> >> alias vl="vi !$" where !$ is the command line "last parameter"
> >
> >Make your own 'function' named `vl`?
> >
> Do I have access to the positional parameters of the previous command
> line /history from inside a function?

This brings up an interesting point.

On the command line, $_ is the last word of the previous command, very
much like !$ is.  (In the external process environment, $_ is the path
name of the currently executing command.)

Inside a function, however, $_ has already been changed to be the last
word of the _currently executing_ command, the same as as $argv[-1].
Which is not really all that useful, though maybe more useful than if
it had been changed to the path name of zsh or some such.

I'm usually a stickler for backwards compatibility, but does anyone
think anything would break if the changing of $_ were delayed until
after shell functions have been called, so that it would remain the
last word of the _previous_ command?

On Mar 11,  1:55pm, Thomas Köhler wrote:
>
> accept-line-or-empty-cmd() {
>     if [ "$LBUFFER$RBUFFER"  = vl ] ; then
>         LBUFFER="vi !$"
>         RBUFFER=""
>     fi
>     builtin zle .accept-line
> }

Cute, but unecessarily complicated:

	if [[ $BUFFER = vl ]]; then BUFFER='vi !$'; fi

It also doesn't really work like an alias.  Consider (in csh) that
	vl foo
would become
	vi !$ foo
whereas your example above would grumble about vl not found.

On Mar 11,  1:23pm, zzapper wrote:
> 
> Tejmo emailed me this solution which works!!
> 
> vl () {
>         gvim.exe $(history -1 | sed "s/.* //g")
> }

That's the right idea, but it's a lot of processes for something you could
do entirely in zsh.

    vl () {
	zmodload -i zsh/parameter	# Just in case
	vi "${${(z)history[${${(@kno)history}[-1]}]}[-1]}" "$@"
    }

I'm tempted to just leave that unexplained, but I wont't.

${(@kno)history}	history numbers in ascending order (note 1)
${${...}[-1]}		last element (largest histno) (note 2)
${(z)history[...]}	corresponding history entry, split to words
${${...}[-1]}		last element (last word of last history entry)

Note 1: The @ is only necessary because the whole thing is inside the
square brackets of ${history[...]}, which forces string context.  Thus
the @ converts back to array context.

Note 2: I'd have used ${${(@knO)history}[1]} except that's affected by
the KSH_ARRAYS option.  Negative subscripting isn't.

Re: $_ and compatibility

[Danek Duvall]

On Thu, Mar 11, 2004 at 05:17:35PM +0000, Bart Schaefer wrote:

> I'm usually a stickler for backwards compatibility, but does anyone
> think anything would break if the changing of $_ were delayed until
> after shell functions have been called, so that it would remain the
> last word of the _previous_ command?

Somewhere, someone would break.  That's almost a given.

But with a proper notice, maybe it would be okay?  I think it would make
sense to keep a list of (non-bug) incompatibilities somewhere in the
distribution so that people would have a definitive place to find out
why their stuff isn't working anymore.

But it still makes it harder to incorporate zsh in a distribution that
strives for backwards compatibility.  :(

Danek

Re: alias vl="vi !$"

[Wayne Davison]

On Thu, Mar 11, 2004 at 05:17:35PM +0000, Bart Schaefer wrote:
> Inside a function, however, $_ has already been changed to be the last
> word of the _currently executing_ command, the same as as $argv[-1].

But it's not changed in an alias, so the simplest approach would appear
to be:

    alias vl='vi $_'

That works for me.

..wayne..

Re: alias vl="vi !$"

[zzapper]

On Thu, 11 Mar 2004 11:05:53 -0800,  wrote:

>On Thu, Mar 11, 2004 at 05:17:35PM +0000, Bart Schaefer wrote:
>> Inside a function, however, $_ has already been changed to be the last
>> word of the _currently executing_ command, the same as as $argv[-1].
>
>But it's not changed in an alias, so the simplest approach would appear
>to be:
>
>    alias vl='vi $_'
>
>That works for me.
>
>..wayne..

That is so wunderbar!!!

But in fact I like all the answers to this thread!!!


zzapper (vim & cygwin & zsh)
--

vim -c ":%s/^/WhfgTNabgureRIvzSUnpxre/|:%s/[R-T]/ /Ig|:normal ggVGg?"

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Re: alias vl="vi !$"

[Thorsten Kampe]

* zzapper (2004-03-11 21:13 +0100)
> On Thu, 11 Mar 2004 11:05:53 -0800,  wrote:
>>On Thu, Mar 11, 2004 at 05:17:35PM +0000, Bart Schaefer wrote:
>>> Inside a function, however, $_ has already been changed to be the last
>>> word of the _currently executing_ command, the same as as $argv[-1].
>>
>>But it's not changed in an alias, so the simplest approach would appear
>>to be:
>>
>>    alias vl='vi $_'
> 
> That is so wunderbar!!!

And the most wonderful thing is that you probably don't need all that 
stuff (alias, function) and simply type "vi [Alt]+[.]" 
("insert-last-word"). Because this is common sequence like 

cat <deletable_file>
rm  <deletable_file>

it doesn't make sense to make aliases or functions for all the 
countless possibilities.

Thorsten

Re: alias vl="vi !$"

[Peter Stephenson]

Bart Schaefer wrote:
> Inside a function, however, $_ has already been changed to be the last
> word of the _currently executing_ command, the same as as $argv[-1].
> Which is not really all that useful, though maybe more useful than if
> it had been changed to the path name of zsh or some such.
> 
> I'm usually a stickler for backwards compatibility, but does anyone
> think anything would break if the changing of $_ were delayed until
> after shell functions have been called, so that it would remain the
> last word of the _previous_ command?

It's not likely anyone's using the present form in a function; after all
there are better ways of getting the current arguments inside a
function, and if the command entered isn't simply the function (there's
a more complicated expression), it's hard to see why you would want the
last argument.

-- 
Peter Stephenson <pws@pwstephenson.fsnet.co.uk>
Work: pws@csr.com
Web: http://www.pwstephenson.fsnet.co.uk