minecraft function

minecraft.bash

# Stupid game.
# minecraft -c | -s [ -p ]
function minecraft {
        typeset \
                jvm=${JAVA_HOME}/bin/java \
                worldPath=~/doc/mcdata2 \
                serverPath=~/doc/programs/ServerJarStorage/Release\ 1.8/minecraft_server.jar \
                clientPath=~/doc/programs/Minecraft.jar

        typeset opt OPTARG OPTIND OPTERR=0
        typeset -A mcopts

        [[ -x $jvm ]] || return

        while getopts :scp: opt; do
                case $opt in
                        \?)
                                printf 'Unknown option: %s\n' "$OPTARG" >&2
                                return 1
                                ;;
                        :)
                                printf '-%s requires an argument.\n' "$OPTARG" >&2
                                return 1
                                ;;
                        *)
                                mcopts[$opt]=$OPTARG
                                OPTARG=
                esac
        done

        if ! ${mcopts[s]+'false'}; then # Server
                pushd "$worldPath" || return
                if ! ${mcopts[p]+'false'}; then # If user supplies a fifo then read from it.
                        if [[ -p ${mcopts[p]} ]]; then
                                 # Open the fifo without blocking using a temporary fd in case there's no writer.
                                 {
                                         {
                                                 #lsof -ap "$BASHPID" -d 0-20 +f G >&2
                                                 #cat
                                                 "$jvm" -Xmx4096M -jar "$serverPath" nogui
                                         } 3<>"${mcopts[p]}" </dev/fd/3 3>&-
                                 } &
                        else
                                printf '%s must be a readable/writable named pipe\n' "${mcopts[p]}" >&2
                                return 1
                        fi
                else
                        "$jvm" -Xmx4096M -jar "$serverPath" nogui &
                fi
                printf 'Minecraft server PID: %d\n' "$!"
                wait
                popd
        elif ! ${mcopts[c]+'false'}; then # Client
                "$jvm" -jar "$clientPath"
        fi
}