# (C) 2010 magicant

# Completion script for the "which" command.
# Supports GNU which 2.20, FreeBSD 8.1, OpenBSD 4.8, NetBSD 5.0,
# Mac OS X 10.6.4, SunOS 5.10, HP-UX 11i v3.

function completion/which {

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

        typeset OPTIONS ARGOPT PREFIX
        OPTIONS=( #>#
        ) #<#

        case $type in (GNU|Darwin|*BSD)
                OPTIONS=("$OPTIONS" #>#
                "a ${long:+--all}; print all matches, not just the first one"
                ) #<#
                case $type in (Darwin|FreeBSD)
                        OPTIONS=("$OPTIONS" #>#
                        "s; print nothing"
                        ) #<#
                esac
                ;;
        esac
        case $type in (GNU)
                OPTIONS=("$OPTIONS" #>#
                "i --read-alias; read alias definitions from the standard input"
                "--skip-alias; cancel the --read-alias option"
                "--read-functions; read function definitions from the standard input"
                "--skip-functions; cancel the --read-functions option"
                "--skip-dot; ignore directory names that start with a dot"
                "--skip-tilde; ignore directories under \$HOME"
                "--show-dot; print \"./program\" for programs in a dot directory"
                "--show-tilde; use ~ for programs under \$HOME"
                "V v --version; print version info"
                "--help"
                ) #<#
                # --tty-only is not completed since it's meaningless in an
                # interactive shell session
        esac

        command -f completion//parseoptions ${long:+-es}
        case $ARGOPT in
        (-)
                command -f completion//completeoptions
                ;;
        (*)
                complete -P "$PREFIX" --external-command
                ;;
        esac

}


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