Re: starting <tab> completion / command history

[Sebastian Tramp <mail@sebastian.tramp.name>]

On Thu, Aug 11, 2011 at 07:08:09PM -0700, Bart Schaefer wrote:

Bart,

thank you very much for this snippet (and the notes!!).

It works exact as I wanted and I can now concentrate on how commands are
saved and which commands are displayed in which directories. big fat
kudo :)

seebi

> On Aug 11, 11:11pm, Sebastian Tramp wrote:
> }
> } Is there a way to map a <tab> at the beginning of a command line to a
> } completion function?
> 
> What you need to do is bind tab to a non-completion zle widget so you
> can examine the cursor position, then invoke the appropriate completion
> widget depending on where you are.
> 
>     overload-tab () {
>       if (( CURSOR < 1 ))
>       then zle your-new-widget
>       else zle expand-or-complete
>       fi
>     }
>     zle -N overload-tab
>     bindkey $'\t' overload-tab
> 
> Next of course you need to define your-new-widget.
> 
> } I want to use it to complete full command lines which I save as a
> } history for each directory so that I can re-use commonly executed
> } commands (incl. parameters) for a specific directory.
> 
> The problem with this scheme is that completion is EXTREMELY word-
> oriented.  As soon as you introduce a command line containing spaces
> and/or quotes and/or punctuation, completion is likely to become very
> confused.
> 
> I've actually implemented something basically like this and the only
> way I got it to work reasonably reliably was (a) bind it to something
> other than TAB and (b) force it directly into menu selection so you
> have to choose the command by navigation.  It's pretty simple and
> looks like this:
> 
> -- 8< -- snip -- 8< --
> #compdef -k menu-complete ^X:
> zmodload -i zsh/complist
> _cmdselect() {
> local -a commands
> commands=(${(f)"$(< ~/.cmdselect)"})
> compadd -Qa commands
> MENUSELECT=0
> compstate[insert]=menu
> }
> _cmdselect "$@"
> -- 8< -- snip -- 8< --
> 
> Note the #compdef line to automatically bind this to ctrl-x colon.
> Also note the use of compadd -Q to insert the selection without turning
> into a monolithic quoted word.

-- 
Sebastian Tramp
WebID: http://sebastian.tramp.name