roles/head-node/files/commands/cord

#!/bin/bash

PROG=$(basename $0)

usage() {
    echo "$PROG [-s|--server <head-node-ip>] [-p|--port <head-node-ssh-port>] [-u|--user <head-node-ssh-user>] <command> <options>"

    # Find all files in path that match the pattern "cord-*"
    ALL_FILES=
    for DIR in $(echo $PATH | sed -e 's/:/ /g'); do
        ALL_FILES="$ALL_FILES $(/bin/ls -1 $DIR/cord-* 2> /dev/null)"
    done

    # Filter that down to only those files that we can "execute"
    COMMANDS=
    for CMD in $ALL_FILES; do
        test -x "$CMD" && COMMANDS="$COMMANDS $CMD"
    done
       
    # Process comands for usage information
    # Output all commands and their help information to file
    # so it can be sorted. The format will be:
    #
    # command usage_message

    # Find longest command name for table spacing
    MAX=0
    for CMD in $COMMANDS; do
        LEN=$(echo $(basename $CMD | sed -e 's/^[^-]*-//g') | wc -c)
        test $LEN -gt $MAX && MAX=$LEN
    done

    FILE=$(mktemp)
    # Process all the commands into the usage file
    for CMD in $COMMANDS; do
        NAME=$(basename $CMD | sed -e 's/^[^-]*-//g')
        DESC=$(grep "^#D " $CMD | head -1 | sed -e 's/^#D\w*//g' )
        printf "    %-${MAX}s    %s\n" $NAME "$DESC" >> $FILE
    done
    sort -u $FILE

    # clean up
    rm -f $FILE
    COMMANDS=$(echo $COMMANDS | sed -e 's/w+/ /g')
}

if [ $# -eq 0 ]; then
    usage
    exit 1
fi

SHORT=
while [ "$SHORT x" == " x" -a $# -gt 0 ]; do
    case $1 in
        help|-h|--help)
            usage
            exit 0
            ;;
        -s|--server)
            shift
	    if [ $# -eq 0 ]; then
		>&2 echo "Server parameter must be specified with '--server' option"
                usage
		exit 1
	    fi
   	    export CORD_HEAD_NODE="$1"
            ;;
	-u|--user)
	    shift
	    if [ $# -eq 0 ]; then
	        >&2 echo "User parameter must be specified with '--user' option"
	        usage
	        exit 1
	    fi
	    export CORD_HEAD_NODE_USER="$1"
	    ;;
	-p|--port)
	    shift
	    if [ $# -eq 0 ]; then
                >&2 echo "Port parameter must be specified with '--port' option"
		usage
		exit 1
            fi
	    export CORD_HEAD_NODE_PORT="$1"
	    ;;
        -*)
            >&2 echo "Unknown command line option '$1'."
            usage
            exit 1
            ;;
        *)
            SHORT=$1
            ;;
    esac
    shift
done

if [ "$SHORT x" == " x" ]; then
    >&2 echo "CORD command must be specified"
    usage
    exit 1
fi

COMMAND="cord-$SHORT"
FULL_COMMAND=$(which $COMMAND)

if [ ! -x "$FULL_COMMAND" ]; then
    >&2 echo "Unknown command specified '$SHORT'."
    usage
    exit 1
fi

test -z $CORD_HEAD_NODE && export CORD_HEAD_NODE="localhost"
test -z $CORD_HEAD_NODE_USER && export CORD_HEAD_NODE_USER="ubuntu"
test -z $CORD_HEAD_NODE_PORT && export CORD_HEAD_NODE_PORT="22"

exec "$FULL_COMMAND" $*