006d_generate_ros_config_on_master_command.sh

#!/bin/bash

# Checking if host is aleady part of a swarm
swarm_status=$(docker info  2> /dev/null | grep -E "^[[:space:]]*Swarm:[[:space:]]*.?.?active" \
    | awk -F":" '{ print $2 }' | tr -d [:blank:]) 

if [ "$swarm_status" = "inactive" ]; then
    echo "[STOPPING] THIS HOST ISN'T PART OF A SWARM?!?!"
    exit -1
fi


# Is it the master or not?
if  docker swarm ca > /dev/null 2>&1; then
    # It the container running?
    if ! docker container inspect swarm_master > /dev/null 2>&1; then
        echo "[STOPPING] CONTAINER ISN'T RUNNING?!?!"
        exit -1
    fi

    IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' swarm_master)
    > ./Commands/bin/set_swarm_settings.bash
    echo "export ROS_HOSTNAME=$IP" >> ./Commands/bin/set_swarm_settings.bash 
    echo "export ROS_IP=$IP" >> ./Commands/bin/set_swarm_settings.bash
    echo "export ROS_MASTER_URI=http://localhost:11311" >> ./Commands/bin/set_swarm_settings.bash
else
    # Worker
    # It the container running?
    read -p "Please supply the container name: " container_name
    
    if ! docker container inspect $container_name> /dev/null 2>&1; then
        echo "[STOPPING] CONTAINER ISN'T RUNNING?!?!"
        exit -1
    fi

    IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $container_name)
    > ./Commands/bin/set_swarm_settings.bash
    echo "export ROS_HOSTNAME=$IP" >> ./Commands/bin/set_swarm_settings.bash 
    echo "export ROS_IP=$IP" >> ./Commands/bin/set_swarm_settings.bash
    
    read -p "IP on overlay network of the master container: " master_ip
    echo "export ROS_MASTER_URI=http://$master_ip:11311" >> ./Commands/bin/set_swarm_settings.bash
fi