#!/bin/bash
# env setup script for step-ca docker compose
# 2023-01-06 by dede & dany

echo "step-ca docker compose setup"
echo "> env setup for step-ca with docker compose..."

# check for existing .env file to not break an existing setup
if [[ -f .env ]]; then
  echo "> .env file already exists. setup will not run. either rename or delete it first."
  exit 1
elif [[ ! -f env.sample ]]; then
  echo "> env.sample file is missing. cannot run."
  exit 2
fi

# create .env file
echo -e "# file generated by ${0##*/} on $(date +"%F %H:%M") by $USER\n" > .env

# step through the list of lines and ask for each key to use default value or set value
# for each line in configfile
while read -r -u 3 line; do

  # keep blank and comment lines
  if [[ -z $line ]] || [[ $line == \#* ]]; then
    echo "$line" >> .env

  # handle variable lines
  else
    # split line by '=' into key and value
    readarray -d "=" -t currvar<<< "$line"
    echo -n "please enter value for ${currvar[0]} [${currvar[1]::-1}]: "
    read -r userinput

    # set userinput as new value
    if [ -n "$userinput" ] ; then
      echo "${currvar[0]}=$userinput" >> .env

    # keep default value if empty userinput
    else
      echo "$line" >> .env
    fi
  fi
done 3< env.sample