Re: Expanding interactively aliases

[Sven Wischnowsky <wischnow@informatik.hu-berlin.de>]

This is probably overkill...


The _expand_alias can be used both as a completer and as a stand-alone 
command. It can be configured with three boolean styles:

  - always-regular: expand regular aliases even if not in command
                    position
  - disabled:       expand disabled aliases, too
  - complete:       (only if used as a command) if the word isn't a
                    alias, complete aliases

It alwasy tries to expand global aliases everywhere, maybe that should 
be configurable, too.

No docs because I don't know if this should go in.


_expand_alias:
------------------------------------------------------------
local word expl tmp pre sel what

setopt localoptions

if [[ -n $funcstack[2] ]]; then
  if [[ "$funcstack[2]" = _prefix ]]; then
    word="$IPREFIX$PREFIX$SUFFIX"
  else
    word="$IPREFIX$PREFIX$SUFFIX$ISUFFIX"
  fi
  pre=()
else
  local curcontext="$curcontext"

  if [[ -z "$curcontext" ]]; then
    curcontext="expand-alias-word:::"
  else
    curcontext="expand-alias-word:${curcontext#*:}"
  fi

  word="$IPREFIX$PREFIX$SUFFIX$ISUFFIX"
  pre=(_main_complete - aliases)
fi

if [[ CURRENT -eq 1 ]]; then
  sel=rg
else
  sel=g
fi

zstyle -t ":completion:${curcontext}:" always-regular && sel="${sel}r"
zstyle -t ":completion:${curcontext}:" disabled && sel="${sel}${(U)sel}"


[[ $sel = *r* ]] && tmp=$aliases[$word]
[[ -z $tmp && $sel = *g* ]] && tmp=$galiases[$word]
[[ -z $tmp && $sel = *R* ]] && tmp=$dis_aliases[$word]
[[ -z $tmp && $sel = *G* ]] && tmp=$dis_galiases[$word]


if [[ -n $tmp ]]; then
  $pre _wanted aliases expl alias compadd -UQ ${(Q)tmp}
elif (( $#pre )) && zstyle -t ":completion:${curcontext}:" complete; then
  $pre _aliases -s "$sel"
else
  return 1
fi
------------------------------------------------------------

And changing _aliases to:
------------------------------------------------------------
#compdef alias unalias

local expl sel args

zparseopts -E -D s:=sel

[[ -z $sel ]] && sel=rg

args=()
[[ $sel = *r* ]] && args=( $args 'aliases:regular alias:compadd -k aliases' )
[[ $sel = *g* ]] && args=( $args 'global-aliases:global alias:compadd -k galiases' )
[[ $sel = *R* ]] && args=( $args 'disabled-aliases:disabled regular alias:compadd -k dis_aliases' )
[[ $sel = *G* ]] && args=( $args 'disabled-global-aliases:disabled global alias:compadd -k dis_galiases' )

_alternative $args
------------------------------------------------------------



Bye
 Sven


--
Sven Wischnowsky                         wischnow@informatik.hu-berlin.de