inject_secrets.rb

require "dotgpg"

class SecretsHandler
  @secret_output_path = "./" #Path to your secret sturct in the project

  def decrypt
    decrytped_secrets = decrypt_secrets()
    secrets_dict = extract_secrets_from(decrypt_secrets)
    inject_into_swift(secrets_dict)
  end

  def dry_run *nil_secrets
    secrets_dict = {}
    nil_secrets.map { |s| secrets_dict[s] = "nil"  }
    inject_into_swift secrets_dict
  end

  private

  def decrypt_secrets
    gpg = Dotgpg::Dir.new "./"
    output = StringIO.new
    gpg.decrypt "secrets.gpg", output
    output.string
  end

  def extract_secrets_from secrets_payload
    secrets = {}
    secrets_payload.split("\n").each do |l|
      keysWithsecret = l.split("=")
      secrets[keysWithsecret[0].strip] = keysWithsecret[1].strip
    end
    secrets
  end

  def inject_into_swift secrets_dict
    content = "struct AppSecrets {\n"
    secrets_dict.each { |key, value|  content << "\tstatic let #{key}: String? = #{value}\n" }
    content << "}"
    File.open("#{@secret_output_path}secrets.swift", "w") { |f| f.puts content }
  end
end

if ARGV.include? "--dry-run"
  SecretsHandler.new.dry_run "firebaseKey", "googleMapsKey", "imageRendererKey"
else
  SecretsHandler.new.decrypt
end