Docker helper function to get a shell

Want to get your bash shell in a running docker container?

run: deit application
(deit, as in: ‘Docker Exec -IT’)

and will show you all running containers which have ‘application’ in the name.

Add the following function to your ~/.bashrc or ~/.zshrc

# Function to display matching containers and allow user selection
function deit {
    container_query="$1"
    shift 1
    container_command="${@:-bash}"  # Default to 'bash' if no command is provided

    # Get the list of matching container names
    matching_containers=($(docker ps --format '{{.Names}}' | grep "$container_query"))
    count=${#matching_containers[@]}

    if [ "$count" -eq 0 ]; then
        echo "No containers found with '$container_query' in the name."
        return 1
    elif [ "$count" -eq 1 ]; then
        container_name="${matching_containers[0]}"
        echo "Found container: $container_name"
        echo "Executing: docker exec -it $container_name $container_command"
        docker exec -it "$container_name" $container_command
    else
        echo "Multiple containers found with '$container_query' in the name:"
        for i in "${!matching_containers[@]}"; do
            echo "$((i + 1)). ${matching_containers[i]}"
        done

        while true; do
            read -p "Choose the number of the container you want to use: " choice
            if [[ "$choice" =~ ^[0-9]+$ ]] && [ "$choice" -ge 1 ] && [ "$choice" -le "$count" ]; then
                container_name="${matching_containers[$((choice - 1))]}"
                echo "Selected container: $container_name"
                echo "Executing: docker exec -it $container_name $container_command"
                docker exec -it "$container_name" $container_command
                break
            else
                echo "Invalid choice. Please try again."
            fi
        done
    fi
}