Class: Sombrero::CLI::Docker::Build

Inherits:
Object
  • Object
show all
Defined in:
lib/sombrero/cli/docker/build.rb

Instance Method Summary collapse

Constructor Details

#initialize(dir, update_runner_only: false, push_opted: false) ⇒ Build

Returns a new instance of Build.



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# File 'lib/sombrero/cli/docker/build.rb', line 6

def initialize dir, update_runner_only: false, push_opted: false
  Dir.chdir dir do

    config = load_config
    validate_config(config)

    build_dir = Pathname.new(File.expand_path('__tmpbuildir__'))

    prepare_build_dir(build_dir)

    install_files(build_dir)

    app_dir = Pathname.new(File.expand_path(config['APP_DIR']))

    if update_runner_only
      puts "Skipping image building"
    else
      prepare_build(build_dir, app_dir)

      image_built = build_image(build_dir, config['IMAGE_NAME'], config['BUILD_OPTS'])

      if image_built && push_opted
        push_image(config['IMAGE_NAME'])
      end
    end

    puts "Installing run script"
    install_run_script(app_dir, *config.values_at('IMAGE_NAME', 'CONTAINER_NAME', 'RUN_SCRIPT', 'RUN_OPTS'))

    FileUtils.rm_rf(build_dir)
  end
end

Instance Method Details

#build_image(dir, image_name, build_opts) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 110

def build_image dir, image_name, build_opts
  CLI.run "docker build -t #{image_name} #{build_opts} '#{dir}'"
  $? && $?.success?
end

#container_definitions(container_name) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 137

def container_definitions container_name
  container_name.map do |kv|
    '[ "$APP_ENV" = "%s" ] && CONTAINER_NAME="%s"' % kv
  end.join("\n")
end

#install_build_files(dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 94

def install_build_files dir
  FileUtils.cp(PREPARE_BUILD_FILE, dir / 'build')
  FileUtils.cp(BUILD_FILE, dir / 'build/build')
end

#install_cleanup_file(dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 99

def install_cleanup_file dir
  FileUtils.cp(CLEANUP_FILE, dir / 'build/cleanup')
end

#install_dockerfile(dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 84

def install_dockerfile dir
  FileUtils.cp(BASE_DIR / 'Dockerfile', dir)
end

#install_files(dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 77

def install_files dir
  install_dockerfile(dir)
  install_start_file(dir)
  install_build_files(dir)
  install_cleanup_file(dir)
end

#install_run_script(app_dir, image_name, container_name, run_script, run_opts) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 120

def install_run_script app_dir, image_name, container_name, run_script, run_opts
  FileUtils.mkdir_p(app_dir / File.dirname(run_script))

  script_path = app_dir / run_script

  File.open script_path, 'w' do |f|
    f << File.read(BASE_DIR / 'run').
      gsub('{image}', image_name).
      gsub('{script_path_traversal}', script_path_traversal(run_script)).
      gsub('{run_opts}', run_opts).
      gsub('{environments}', container_name.keys.join(' ')).
      gsub('{container_definitions}', container_definitions(container_name))
  end

  FileUtils.chmod('+x', script_path)
end

#install_start_file(dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 88

def install_start_file dir
  File.open dir / 'start', 'w' do |f|
    f << File.read(BASE_DIR / 'start').sub('{start}', File.read(START_FILE))
  end
end

#load_config ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 39

def load_config
  YAML.load(File.read(CONFIG_FILE))
end

#prepare_build(dir, app_dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 103

def prepare_build dir, app_dir
  Dir.chdir dir / 'build' do
    CLI.run "APP_DIR=#{app_dir} #{PREPARE_BUILD_FILE}"
    exit 1 unless $? && $?.success?
  end
end

#prepare_build_dir(dir) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 72

def prepare_build_dir dir
  FileUtils.rm_rf(dir)
  FileUtils.mkdir_p(dir / 'build')
end

#push_image(image_name) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 115

def push_image image_name
  CLI.run "docker push #{image_name}"
  $? && $?.success?
end

#script_path_traversal(run_script) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 143

def script_path_traversal run_script
  run_script.gsub(/\A\/+|\/+\Z/, '').scan(/\/+/).map {'..'}*'/'
end

#validate_config(config) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 43

def validate_config config
  {
    'IMAGE_NAME' => :validate_config__image_name,
    'CONTAINER_NAME' => :validate_config__container_name,
    'APP_DIR' => :validate_config__app_dir,
    'RUN_SCRIPT' => :validate_config__run_script,
  }.each_pair do |key,validator|
    next if send(validator, config[key])
    puts "", "\t::: Please set #{key} in config.yml :::", ""
    exit 1
  end
end

#validate_config__app_dir(value) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 64

def validate_config__app_dir value
  !value.nil? && !value.empty?
end

#validate_config__container_name(value) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 60

def validate_config__container_name value
  !value.nil? && !value.empty? && value.values.any?
end

#validate_config__image_name(value) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 56

def validate_config__image_name value
  !value.nil? && !value.empty?
end

#validate_config__run_script(value) ⇒ Object 



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# File 'lib/sombrero/cli/docker/build.rb', line 68

def validate_config__run_script value
  !value.nil? && !value.empty?
end