# (C) 2010 magicant

# Completion script for the "ln" command.
# Supports POSIX 2008, GNU coreutils 8.4, FreeBSD 8.1, OpenBSD 4.8, NetBSD 5.0,
# Mac OS X 10.6.4, SunOS 5.10, HP-UX 11i v3.

function completion/ln {

	case $("${WORDS[1]}" --version 2>/dev/null) in
		(*'coreutils'*) typeset type=GNU ;;
		(*)             typeset type="$(uname 2>/dev/null)" ;;
	esac
	case $type in
		(GNU) typeset long=true ;;
		(*)   typeset long= ;;
	esac

	typeset OPTIONS POSIXOPTIONS ADDOPTIONS ARGOPT PREFIX
	POSIXOPTIONS=( #>#
	"f ${long:+--force}; remove existing target"
	"L ${long:+--logical}; make a link to the file referred to by the symbolic link"
	"P ${long:+--physical}; make a link to the symbolic link itself"
	"s ${long:+--symbolic}; make a symbolic link rather than a hard link"
	) #<#

	ADDOPTIONS=()
	case $type in (GNU|FreeBSD|NetBSD|Darwin|HP-UX)
		ADDOPTIONS=("$ADDOPTIONS" #>#
		"i ${long:+--interactive}; ask before overwriting existing files"
		) #<#
		case $type in (GNU|FreeBSD|NetBSD|Darwin)
			ADDOPTIONS=("$ADDOPTIONS" #>#
			"v ${long:+--verbose}; print a message for each file processed"
			) #<#
		esac
	esac
	case $type in
	(GNU)
		ADDOPTIONS=("$ADDOPTIONS" #>#
		"b; like --backup=existing"
		"--backup::; specify how to make a backup"
		"d F --directory; make a hard link to a directory"
		"n --no-dereference; don't follow symbolic links"
		"S: --suffix:; specify a suffix to append to backup file names"
		"T --no-target-directory; always treat the destination as a regular file"
		"t: --target-directory:; specify a destination directory"
		"--help"
		"--version"
		) #<#
		;;
	(*BSD|Darwin)
		ADDOPTIONS=("$ADDOPTIONS" #>#
		"h n; don't follow symbolic links"
		) #<#
		case $type in (FreeBSD|Darwin)
			ADDOPTIONS=("$ADDOPTIONS" #>#
			"F; replace the target directory with a link (with -s)"
			) #<#
			case $type in (FreeBSD)
				ADDOPTIONS=("$ADDOPTIONS" #>#
				"w; warn when making a symbolic link to a unexisting file"
				) #<#
			esac
		esac
		;;
	esac

	OPTIONS=("$POSIXOPTIONS" "$ADDOPTIONS")
	unset POSIXOPTIONS ADDOPTIONS

	command -f completion//parseoptions ${long:+-es}
	case $ARGOPT in
	(-)
		command -f completion//completeoptions
		;;
	(--backup)
		if command -vf completion//completebackup >/dev/null 2>&1 ||
				. -AL completion/_backup; then
			command -f completion//completebackup
		fi
		;;
	(S|--suffix)
		;;
	(t|--target-directory)
		complete -T -P "$PREFIX" -S / -d
		;;
	(*)
		complete -f
		;;
	esac

}


# vim: set ft=sh ts=8 sts=8 sw=8 noet:
