brew/Library/Homebrew/gpg.rb

require "utils"

class Gpg
  module_function

  def executable
    which "gpg"
  end

  def available?
    File.executable?(executable.to_s)
  end

  def create_test_key(path)
    odie "No GPG present to test against!" unless available?

    (path/"batch.gpg").write <<~EOS
      Key-Type: RSA
      Key-Length: 2048
      Subkey-Type: RSA
      Subkey-Length: 2048
      Name-Real: Testing
      Name-Email: testing@foo.bar
      Expire-Date: 1d
      %no-protection
      %commit
    EOS
    system executable, "--batch", "--gen-key", "batch.gpg"
  end

  def cleanup_test_processes!
    odie "No GPG present to test against!" unless available?

    gpgconf = Pathname.new(executable).parent/"gpgconf"

    system gpgconf, "--kill", "gpg-agent"
    system gpgconf, "--homedir", "keyrings/live", "--kill",
                                 "gpg-agent"
  end

  def test(path)
    create_test_key(path)
    begin
      yield
    ensure
      cleanup_test_processes!
    end
  end
end