# (C) 2010 magicant

# Completion script for the "chgrp" command.
# Supports POSIX 2008, GNU coreutils 8.4, FreeBSD 8.1, OpenBSD 4.8, NetBSD 5.0,
# Mac OS X 10.6.3, SunOS 5.10, HP-UX 11i v3.

function completion/chgrp {

	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=( #>#
	"h ${long:+--no-dereference}; change the group of symbolic links"
	"H; follow symbolic links to directories in operands (with -R)"
	"L; follow all symbolic links to directories (with -R)"
	"P; don't follow any symbolic links (with -R)"
	"R ${long:+--recursive}; recursively change the group of files in a directory"
	) #<#

	ADDOPTIONS=()
	case $type in (GNU|*BSD|Darwin|SunOS)
		ADDOPTIONS=("$ADDOPTIONS" #>#
		"f ${long:+--silent --quiet}; suppress error messages"
		) #<#
		case $type in (GNU|NetBSD|FreeBSD|Darwin)
			ADDOPTIONS=("$ADDOPTIONS" #>#
			"v ${long:+--verbose}; print a message for each file processed"
			) #<#
		esac
	esac
	case $type in
	(GNU)
		ADDOPTIONS=("$ADDOPTIONS" #>#
		"c --changes; print a message when a change has been made"
		"--dereference; change the group of files referred to by symbolic links"
		"--no-preserve-root; cancel the --preserve-root option"
		"--preserve-root; don't recursively change the group of the root directory"
		"--reference:; specify a file to whose group changes are made"
		"--help"
		"--version"
		) #<#
		;;
	(FreeBSD)
		ADDOPTIONS=("$ADDOPTIONS" #>#
		"x; stop recursion when reaching a different file system"
		) #<#
		;;
	esac

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

	command -f completion//parseoptions ${long:+-es}
	case $ARGOPT in
	(-)
		command -f completion//completeoptions
		;;
	(--reference)
		complete -P "$PREFIX" -f
		;;
	(*)
		command -f completion//getoperands
		if [ ${WORDS[#]} -eq 0 ]; then
			complete -g
		else
			complete -f
		fi
		;;
	esac

}


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