instance method validate!

# File lib/kamal/cli/build/clone.rb, line 45
    def validate!
      status = capture_with_info(*KAMAL.builder.clone_status).strip

      unless status.empty?
        raise Kamal::Cli::Build::BuildError, "Clone in #{KAMAL.config.builder.build_directory} is dirty, #{status}"
      end

      revision = capture_with_info(*KAMAL.builder.clone_revision).strip
      if revision != Kamal::Git.revision
        raise Kamal::Cli::Build::BuildError, "Clone in #{KAMAL.config.builder.build_directory} is not on the correct revision, expected `#{Kamal::Git.revision}` but got `#{revision}`"
      end
    rescue SSHKit::Command::Failed => e
      raise Kamal::Cli::Build::BuildError, "Failed to validate clone: #{e.message}"
    end