bash-completion/contrib/tar

# -*- mode: shell-script; sh-basic-offset: 8; indent-tabs-mode: t -*-
# ex: ts=8 sw=8 noet filetype=sh
#
# bash completion for GNU tar

have tar && {
_tar()
{
	local cur ext regex tar untar

	COMPREPLY=()
	cur=`_get_cword`

	if [ $COMP_CWORD -eq 1 ]; then
		COMPREPLY=( $( compgen -W 'c t x u r d A' -- "$cur" ) )
		return 0
	fi

	case "${COMP_WORDS[1]}" in
	?(-)[cr]*f)
		_filedir
		return 0
		;;
	+([^IZzJjy])f)
		ext='t@(ar?(.@(Z|gz|bz?(2)|lz?(ma)))|gz|bz?(2)|lz?(ma))'
		regex='t\(ar\(\.\(Z\|gz\|bz2\?\|lzma\|xz\)\)\?\|gz\|bz2\?\|lzma\|xz\)'
		;;
	*[Zz]*f)
		ext='t?(ar.)@(gz|Z)'
		regex='t\(ar\.\)\?\(gz\|Z\)'
		;;
	*[Ijy]*f)
		ext='t?(ar.)bz?(2)'
		regex='t\(ar\.\)\?bz2\?'
		;;
	*[J]*f)
		ext='t?(ar.)@(lz?(ma)|xz)'
		regex='t\(ar\.\)\?\(lzma\|xz\)\?'
		;;
	*)
		_filedir
		return 0
		;;

	esac

	if [[ "$COMP_LINE" == *$ext' ' ]]; then
		# complete on files in tar file
		#
		# get name of tar file from command line
		tar=$( echo "$COMP_LINE" | \
			sed -e 's/^.* \([^ ]*'$regex'\) .*$/\1/' )
		# devise how to untar and list it
		untar=t${COMP_WORDS[1]//[^Izjyf]/}

		COMPREPLY=( $( compgen -W "$( echo $( tar $untar $tar \
				2>/dev/null ) )" -- "$cur" ) )
		return 0
	fi

	# file completion on relevant files
	_filedir "$ext"

	return 0
}
[ -n "${COMP_TAR_INTERNAL_PATHS:-}" ] && complete -F _tar $dirnames tar ||
	complete -F _tar $filenames tar
}