Re: Completer help wanted

[Mikael Magnusson <mikachu@xxxxxxxxx>]

2009/1/31 Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>:
> On Sat, 31 Jan 2009 19:55:31 +0100
> Mikael Magnusson <mikachu@xxxxxxxxx> wrote:
>> I want to write a _use that lets me complete USE=<tab> on gentoo. I already
>> have a _gentoo_packages (which I didn't write) that does it for euse and
>> other commands, with code that looks like this:
>> _gentoo_packages_update_useflag(){
>>     local flags PORTDIR
>>       var=PORTDIR
>>       [[ -z ${(P)var} && -r /etc/make.conf ]] &&
>>           local $var="`. /etc/make.conf 2>/dev/null; echo ${(P)var}`"
>>       [[ -z ${(P)var} && -r /etc/make.globals ]] &&
>>           local $var="`. /etc/make.globals 2>/dev/null; echo ${(P)var}`"
>>
>>     flags=( ${${(M)${(f)"$(<$PORTDIR/profiles/use.desc)"}:#* - *}%% - *}
>>     ${${${(M)${(f)"$(<$PORTDIR/profiles/use.local.desc)"}#* - *}%% - *}#*:} )
>>     compadd $flags
>> }
>>
>> I would not be averse to copying it instead of calling it. This is what
>> I got so far,
>>
>> #compdef -value-,USE,-default-
>> _gentoo_packages useflag
>>
>> But it only completes one useflag and goes away. I want to complete several,
>> and have them separated by spaces.
>
> Without looking at this in any detail (which I'm not going to do), it
> sounds like you're going to have to use "compadd -P <something>" to skip
> over what's been added already so that it starts the completion afresh
> each time.  The <something> probably ends in a space, possibly "* ".  It
> sounds like you you also need space as a removable suffix (compadd -q -S
> ' ').
>
> In a fully "compliant" completion function you would usually use _wanted
> before the compadd to get tag support correct, but that's just the icing
> on the cake.

Thanks, I think I got it working as well as I need it to. You meant compset
for -P, which took me a few seconds to realize. Here's what I got:

#compdef -value-,USE,-default-

local flags PORTDIR space
var=PORTDIR
[[ -z ${(P)var} && -r /etc/make.conf ]] &&
  local $var="`. /etc/make.conf 2>/dev/null; echo ${(P)var}`"
[[ -z ${(P)var} && -r /etc/make.globals ]] &&
  local $var="`. /etc/make.globals 2>/dev/null; echo ${(P)var}`"

flags=( ${${(M)${(f)"$(<$PORTDIR/profiles/use.desc)"}:#* - *}%% - *}
${${${(M)${(f)"$(<$PORTDIR/profiles/use.local.desc)"}#* - *}%% - *}#*:} )

if [[ -n $compstate[quote] ]]; then
  space=' '
else
  space='\ '
fi
compset -P "* "
compadd -S $space $flags


Is there some more automagic way to handle the quoting?

-- 
Mikael Magnusson