Extracts all variable names from a compose.yml and creates a .env file ready for values to be inserted

generate-env.sh

#!/bin/bash

# Define the Compose file path
COMPOSE_FILE="compose.yml"

# Define the .env file to create
ENV_FILE=".env"

# Empty the .env file if it already exists
> $ENV_FILE

# Extract the variable names and write them to the .env file
grep -oP '\$\{\K[^}]*' "$COMPOSE_FILE" | sort -u | while read -r var_name; do
    echo "$var_name=" >> "$ENV_FILE"
done

echo "The .env file has been created with empty values for the variables."