Class: Amigrind::Build::PackerRunner

Inherits:
Object
  • Object
show all
Includes:
Core::Logging::Mixin
Defined in:
lib/amigrind/build/packer_runner.rb

Instance Method Summary collapse

Constructor Details

#initialize(template, amigrind_client, blueprint, repo) ⇒ PackerRunner

Returns a new instance of PackerRunner.



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# File 'lib/amigrind/build/packer_runner.rb', line 14

def initialize(template, amigrind_client, blueprint, repo)
  @template = template
  @amigrind_client = amigrind_client
  @blueprint = blueprint
  @repo = repo
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/amigrind/build/packer_runner.rb', line 21

def run
  credentials = @amigrind_client.credentials

  aws_env_vars =
    case credentials.class
    when Aws::Credentials
      "AWS_ACCESS_KEY_ID='#{access_key}' AWS_SECRET_ACCESS_KEY='#{secret_key}'"
      {
        'AWS_ACCESS_KEY_ID' => credentials.access_key_id,
        'AWS_SECRET_ACCESS_KEY' => credentials.instance_variable_get(:@secret_access_key)
      }
    when Aws::SharedCredentials
      {
        'AWS_PROFILE' => credentials.profile_name,
        'AWS_DEFAULT_PROFILE' => credentials.profile_name
      }
    else
      {}
    end

  thread = nil
  retval = {
    region: @blueprint.aws.region,
    spools: { stdout: [], stderr: [] }
  }

  Dir.chdir @repo.path do
    Open3.popen3(aws_env_vars, 'packer build -machine-readable -') do |i, o, e, thr|
      thread = thr
      retval[:pid] = thread.pid

      i.write @template
      i.flush
      i.close_write

      streams = [ o, e ]

      stream_names = { o.fileno => :stdout, e.fileno => :stderr }

      until streams.find { |f| !f.eof }.nil?
        ready = IO.select(streams)

        if ready
          readable_streams = ready[0]

          readable_streams.each do |stream|
            stream_name = stream_names[stream.fileno]

            begin
              data = stream.read_nonblock(8192).strip
              debug_log data

              retval[:spools][stream_name] << data
              tokens = data.split(',')

              unless tokens.empty?
                if stream != o || tokens[2] == 'ui'
                  tokens.last.split('\n').each do |log_line|
                    info_log "packer | #{log_line.gsub('%!(PACKER_COMMA)', ',')}"
                  end
                end

                if tokens[2] == 'artifact' && tokens[4] == 'id'
                  retval[:amis] =
                    tokens[5].split('%!(PACKER_COMMA)').map { |pair| pair.split(':') }.to_h
                end
              end
            rescue EOFError => _
              debug_log "#{stream_name} eof"
              streams.delete stream # this is necessary, otherwise
            end
          end
        end
      end
    end
  end

  retval[:success] = thread.value.success?
  retval[:exit_code] = thread.value.exitstatus

  raise "ERROR: packer returned successfully, but couldn't parse AMIs?" \
    if retval[:success] && (retval[:amis].nil? || retval[:amis].empty?)

  retval
end