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#!/usr/bin/env ruby

file_names = ['path/to/config.local.php']

config_values = [
  'CS_CART_DB_HOST',
  'CS_CART_DB_NAME',
  'CS_CART_DB_USER',
  'CS_CART_DB_PASSWORD',
  'CS_CART_HTTP_HOST',
  'CS_CART_HTTP_PATH',
  'CS_CART_HTTPS_HOST',
  'CS_CART_HTTPS_PATH',
  'CS_CART_CUSTOMER_INDEX',
  'CS_CART_ADMIN_INDEX'
]

file_names.each do |file_name|
  text = File.read(file_name)
  config_values.each do |config_value|
    search_regexp = /%#{Regexp.quote(config_value)}%/
    next if ENV[config_value].nil?
    p ENV[config_value]
    text = text.gsub(search_regexp, ENV[config_value])
  end

  # To write changes to the file, use:
  File.open(file_name, "w") {|file| file.puts text }
end