overlay/sys-kernel/genkernel/files/genkernel.bash

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2012-11-08 01:44:18 +01:00
# genkernel (8) completion
# Copyright 2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Written by Aron Griffis <agriffis@gentoo.org>
_genkernel()
{
declare cur prev genkernel_help actions params
COMPREPLY=()
cur=${COMP_WORDS[COMP_CWORD]}
prev=${COMP_WORDS[COMP_CWORD-1]}
# extract initial list of params/actions from genkernel --help
genkernel_help=$(command genkernel --help)
actions=( $(<<<"$genkernel_help" sed -n \
'/^Available Actions:/,/^$/s/^[[:space:]]\+\([^[:space:]]\+\).*/\1/p') )
params=( $(<<<"$genkernel_help" egrep -oe '--[^[:space:]]{2,}') )
# attempt to complete the current parameter based on the list
COMPREPLY=($(compgen -W "${params[*]/=*/=} ${actions[*]}" -- "$cur"))
# if we don't have a rhs to complete
if [[ ${#COMPREPLY[@]} -gt 1 ]]; then
return
elif [[ ${#COMPREPLY[@]} -eq 0 && $cur != --*=* ]]; then
return
elif [[ ${#COMPREPLY[@]} -eq 1 && $COMPREPLY != --*= ]]; then
# using nospace completion, add an explicit space
COMPREPLY="${COMPREPLY} "
return
fi
# we have a unique lhs and need to complete the rhs
declare args lhs rhs
if [[ ${#COMPREPLY[@]} -eq 1 ]]; then
lhs=$COMPREPLY
else
lhs=${cur%%=*}=
rhs=${cur#*=}
fi
# genkernel's help gives clues as to what belongs on the rhs.
# extract the clue for the current parameter
args=" ${params[*]} "
args="${args##* $lhs}"
args="${args%% *}"
# generate a list of completions for the argument; this replaces args with
# an array of results
args=( $(case $args in
('<0-5>') compgen -W "$(echo {1..5})" -- "$rhs" ;;
('<outfile>'|'<file>') compgen -A file -o plusdirs -- "$rhs" ;;
('<dir>') compgen -A directory -S / -- "$rhs" ;;
('<tbz2>') compgen -G '*.tbz2' -G '*.tar.bz2' -o plusdirs -- "$rhs" ;;
(*) compgen -o bashdefault -- "$rhs" ;; # punt
esac) )
# we're using nospace completion to prevent spaces after paths that aren't
# "done" yet. So do some hacking to the args to add spaces after
# non-directories.
declare slash=/
args=( "${args[@]/%/ }" ) # add space to all
args=( "${args[@]/%$slash /$slash}" ) # remove space from dirs
# recreate COMPREPLY
if [[ $cur == "$lhs"* ]]; then
COMPREPLY=( "${args[@]}" )
elif [[ ${#args[@]} -gt 0 ]]; then
COMPREPLY=( "${args[@]/#/$lhs}" )
fi
}
complete -o nospace -F _genkernel genkernel