# Easier port forwarding - usage:
#
# $ portforward project-app1 5432
#
# where 'project-app1' is an alias from ~/.ssh/config and 5432 is the remote
# port that you want to forward to.
function portforward() {
    HOST=$1
    REMOTE_PORT=$2
    # Pick a random port and check it is free
    LOCAL_PORT=$((RANDOM+1000))
    if ! [[ `lsof -i :$LOCAL_PORT | grep COMMAND` ]]
    then
        # Port is free - woop!
        echo "Forwarding to port $REMOTE_PORT on $HOST from http://localhost:$LOCAL_PORT"
        ssh -L $LOCAL_PORT:localhost:$REMOTE_PORT $HOST -N 2> /dev/null
    else
        # Recursion ftw
        portforward $HOST $REMOTE_PORT
    fi
}