Class: Machinery::BuildTask

Inherits:
Object show all
Defined in:
lib/build_task.rb

Overview

Copyright © 2013-2016 SUSE LLC

This program is free software; you can redistribute it and/or modify it under the terms of version 3 of the GNU General Public License as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, contact SUSE LLC.

To contact SUSE about this file by physical or electronic mail, you may find current contact information at www.suse.com

Instance Method Summary collapse

Instance Method Details

#build(system_description, output_path, options = {}) ⇒ Object 



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# File 'lib/build_task.rb', line 19

def build(system_description, output_path, options = {})
  Machinery::LocalSystem.validate_architecture("x86_64")
  Machinery::LocalSystem.validate_existence_of_packages(["kiwi", "kiwi-desc-vmxboot"])
  system_description.validate_build_compatibility

  tmp_config_dir = Dir.mktmpdir("machinery-config", "/tmp")
  tmp_image_dir = Dir.mktmpdir("machinery-image", "/tmp")
  img_extension = "qcow2"

  config = Machinery::KiwiConfig.new(system_description, options)
  config.write(tmp_config_dir)

  begin
    FileUtils.mkdir_p(output_path)
  rescue Errno::EACCES
    raise Machinery::Errors::BuildDirectoryCreateError.new(
      output_path,
      Machinery::CurrentUser.new.username
    )
  end

  if tmp_image_dir.start_with?("/tmp/") && tmp_config_dir.start_with?("/tmp/")
    tmp_script = write_kiwi_wrapper(tmp_config_dir, tmp_image_dir,
      output_path, img_extension)

    begin
      with_c_locale do
        Machinery::LoggedCheetah.run(
          "sudo",
          tmp_script.path,
          stdout: $stdout,
          stderr: $stderr
        )
      end
    rescue SignalException => e
      # Handle SIGHUP(1), SIGINT(2) and SIGTERM(15) gracefully
      if [1, 2, 15].include?(e.signo)
        Machinery::Ui.warn "Warning: Interrupted by user. Waiting for build process to abort..."

        # When we got a SIGHUP or a SIGTERM we send a SIGINT to all processes
        # in our progress group (forked by Cheetah).
        # For SIGINT that's not needed because it is propagated automatically.
        #
        # The reason for killing the child processes with SIGINT (vs SIGTERM)
        # is that with SIGTERM the bash wrapper script around kiwi returns
        # while the unmounting of /proc is still in progress. That would break
        # the cleanup of the temporary kiwi directories below.
        if [1, 15].include?(e.signo)
          trap("INT") {}
          `sudo kill -INT -#{Process.getpgrp}`
        end
        Process.waitall

        Machinery::Ui.warn "Cleaning up temporary files..."
        [tmp_config_dir, tmp_image_dir].each do |path|
          Machinery::LoggedCheetah.run("sudo", "rm", "-r", path) if Dir.exist?(path)
        end
      end
      raise
    rescue Cheetah::ExecutionFailed
      raise(
        Machinery::Errors::BuildFailed,
        "The execution of the build script failed."
      )
    ensure
      tmp_script.delete
    end
  else
    raise RuntimeError.new(
      "The Kiwi temporary build directories are not in /tmp. This should " \
      "never happen, so nothing is deleted."
    )
  end

  image_file = Dir.glob(File.join(output_path, "*.#{img_extension}")).first

  unless image_file
    raise(Machinery::Errors::BuildFailed, "The image build process failed. Check " \
      "build log '#{tmp_image_dir}/kiwi-terminal-output.log' for more " \
      "details."
    )
  end

  meta_data = {
    description: system_description.name,
    image_file: File.basename(image_file)
  }
  File.write(File.join(output_path, Machinery::IMAGE_META_DATA_FILE),
    meta_data.to_yaml
  )
end

#kiwi_wrapper(tmp_config_dir, tmp_image_dir, output_path, image_extension) ⇒ Object 



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# File 'lib/build_task.rb', line 111

def kiwi_wrapper(tmp_config_dir, tmp_image_dir, output_path, image_extension)
  script = "#!/bin/bash\n"
  script << "/usr/sbin/kiwi --build '#{tmp_config_dir}' --destdir '#{tmp_image_dir}' --logfile '#{tmp_image_dir}/kiwi-terminal-output.log'\n"
  script << "if [ $? -eq 0 ]; then\n"
  script << "  mv '#{tmp_image_dir}/'*.#{image_extension} '#{output_path}'\n"
  script << "  rm -rf '#{tmp_image_dir}'\n"
  script << "else\n"
  script << "  echo -e 'Building the Image with Kiwi failed.\nThe Kiwi build directory #{tmp_image_dir} was not removed.'\n"
  script << "fi\n"
  script << "rm -rf '#{tmp_config_dir}'\n"
end

#write_kiwi_wrapper(tmp_config_dir, tmp_image_dir, output_path, image_extension) ⇒ Object 



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# File 'lib/build_task.rb', line 123

def write_kiwi_wrapper(tmp_config_dir, tmp_image_dir, output_path, image_extension)
  begin
    script = Tempfile.new('machinery-kiwi-wrapper-script')
    script << kiwi_wrapper(tmp_config_dir, tmp_image_dir, output_path, image_extension)
  ensure
    script.close unless script == nil
  end
  File.chmod(0755, script.path)
  script
end