Check ALL ENV in a golang program

check_env.sh

#!/bin/bash



# Replace 'application' with the actual path to your Go project directory
PROJECT_DIR="application"
OUTPUT_FILE="env_variables.yaml"
ENV_FILE="$1"  # Specify the correct path to your optional environment file

#  if $1 is help or -h, print help
if [ "$1" == "help" ] || [ "$1" == "--help" ] || [ "$1" == "-help" ] || [ "$1" == "-h" ] || [ "$1" == "--h" ]; then
  echo "Usage: ./check_env.sh [env_file]"
  echo "  env_file: Optional path to environment file"
  exit 0
fi

# if env file is not provided, use .env file
if [ -z "$ENV_FILE" ]; then
  ENV_FILE="$PROJECT_DIR/.env"
fi

# Find all Go files in the project directory
GO_FILES=$(find "$PROJECT_DIR" -name "*.go")

# Initialize an array to store unique environment variables
unique_env_vars=()

# Loop through each Go file and find os.Getenv calls
for file in $GO_FILES; do
  env_vars=($(grep -oE 'os\.Getenv\("[A-Za-z_][A-Za-z0-9_]*"\)' "$file" | sed -E 's/os\.Getenv\("([A-Za-z_][A-Za-z0-9_]*)"\)/\1/g'))
  for env_var in "${env_vars[@]}"; do
    if [[ ! " ${unique_env_vars[@]} " =~ " ${env_var} " ]]; then
      unique_env_vars+=("$env_var")
    fi
  done
done

echo "" > "$OUTPUT_FILE"

# Write the unique environment variables to the output file
for env_var in "${unique_env_vars[@]}"; do
  echo "$env_var" >> "$OUTPUT_FILE"
done

# Function to check if an environment variable is set
check_env_var() {
  if [ -n "$1" ]; then
    if [ -n "${!1}" ]; then
      echo "true"
    elif [ -f "$2" ] && grep -q "^$1=" "$2"; then
      echo "true"
    else
      echo "false"
    fi
  else
    echo "false"
  fi
}

# Read the unique environment variables from the file
unique_env_vars=()
while IFS= read -r line; do
  unique_env_vars+=("$line")
done < "$OUTPUT_FILE"

# Initialize arrays for true and false variables
true_vars=()
false_vars=()

# Check if environment variables are provided and group them
for env_var in "${unique_env_vars[@]}"; do
    if [ -n "$env_var" ]; then
      env_var_status=$(check_env_var "$env_var" "$ENV_FILE")
      if [ "$env_var_status" == "true" ]; then
        true_vars+=("$env_var")
      else
        false_vars+=("$env_var")
      fi
    fi
done

> "$OUTPUT_FILE"

# Print true variables at the top, followed by a blank line, then false variables
for env_var in "${true_vars[@]}"; do
  echo "$env_var: true" >> "$OUTPUT_FILE"
done

echo  >> "$OUTPUT_FILE"

for env_var in "${false_vars[@]}"; do
  echo "$env_var: false" >> "$OUTPUT_FILE"
done


echo "--------------------"
echo "   Check completed"
echo "   Results are written to '$OUTPUT_FILE'"
echo "--------------------"