get_db_url.sh

#!/bin/bash

# Detect the operating system
os=$(uname)

# Get the network interface and IP address based on the OS
if [ "$os" == "Linux" ]; then
  interface=$(ip route | grep default | awk '{print $5}')
  ip_address=$(ip addr show $interface | grep 'inet ' | awk '{print $2}' | cut -d/ -f1)
elif [ "$os" == "Darwin" ]; then  # macOS
  interface=$(route -n get default | grep 'interface:' | awk '{print $2}')
  ip_address=$(ifconfig $interface | grep 'inet ' | awk '{print $2}')
else
  echo "Unsupported OS"
  exit 1
fi

# Copy the example env file to .env if it doesn't exist
[ ! -f .env ] && cp env.example .env

# Check if DATABASE_URL is set in .env, if not, set it
if ! grep -q "^DATABASE_URL" .env; then
  # Remove the existing DATABASE_URL line
  if [ "$os" == "Linux" ]; then
    sed -i '/^DATABASE_URL/d' .env
  elif [ "$os" == "Darwin" ]; then
    sed -i '' '/^DATABASE_URL/d' .env
  fi

  # Append the new DATABASE_URL line to a new line
  echo -e "\nDATABASE_URL=postgres://root:root@$ip_address:5440/webservice_tutorial" >> .env
else
  echo "DATABASE_URL is already set in .env"
fi