atomize.rb

require 'yaml'

class SnapcraftConfig
  module AttrRecorder
    def attr_accessor(*args)
      record_readable(*args)
      super
    end

    def attr_reader(*args)
      record_readable(*args)
      super
    end

    def record_readable(*args)
      @readable_attrs ||= []
      @readable_attrs += args
    end

    def readable_attrs
      @readable_attrs
    end
  end

  module YamlAttributer
    def encode_with(c)
      c.tag = nil # Unset the tag to prevent clutter
      self.class.readable_attrs.each do |readable_attrs|
        c[readable_attrs.to_s.tr('_', '-')] = method(readable_attrs).call
      end
      super(c) if defined?(super)
    end
  end

  class Part
    extend AttrRecorder
    prepend YamlAttributer

    # Array<String>
    attr_accessor :after
    # String
    attr_accessor :plugin
    # String
    attr_accessor :source
    # Array<String>
    attr_accessor :configflags
    # Array<String>
    attr_accessor :build_packages
    # Array<String>
    attr_accessor :stage_packages
    # Hash
    attr_accessor :filesets
    # Array<String>
    attr_accessor :snap

    def initialize
      @after = []
      @plugin = 'cmake'
      @source = nil
      @configflags = %w(
        -DKDE_INSTALL_USE_QT_SYS_PATHS=ON
        -DCMAKE_INSTALL_PREFIX=/usr
        -DCMAKE_BUILD_TYPE=Debug
        -DENABLE_TESTING=OFF
        -DBUILD_TESTING=OFF
        -DKDE_SKIP_TEST_SETTINGS=ON
      )
      @build_packages = []
      @stage_packages = []
      @filesets = {
        'exclusion' => %w(
          -usr/lib/*/cmake/*
          -usr/include/*
          -usr/share/ECM/*
          -usr/share/doc/*
          -usr/share/man/*
        )
      }
      @snap = %w($exclusion)
    end

    def encode_with(c)
      return unless @plugin == 'nil' || @plugin.nil?
      p c
      # c['configflags']
    end
  end

  class Slot
    extend AttrRecorder
    prepend YamlAttributer

    attr_accessor :content
    attr_accessor :interface
    attr_accessor :read
  end

  extend AttrRecorder
  prepend YamlAttributer

  attr_accessor :name
  attr_accessor :version
  attr_accessor :summary
  attr_accessor :description
  attr_accessor :confinement
  attr_accessor :grade
  attr_accessor :slots
  attr_accessor :parts

  def initialize
    @parts = {}
    @slots = {}
  end
end

config = SnapcraftConfig.new
config.name = 'kde-frameworks-5'
config.version = '5.30'
config.summary = 'KDE Frameworks 5'
config.description = 'KDE Frameworks are addons and useful extensions to Qt'
config.confinement = 'devmode'
config.grade = 'stable'

slot = SnapcraftConfig::Slot.new
slot.content = 'kde-frameworks-5-all'
slot.interface = 'content'
slot.read = %w(usr)
config.slots['kde-frameworks-5-slot'] = slot

# This list is generated by resolving and sorting the dep tree from
# kde-build-metadata. Commented out bits we don't presently want to build.
parts = %w(qt5 extra-cmake-modules kcoreaddons) + # kdesupport/polkit-qt-1
        %w(kauth kconfig kwidgetsaddons kcompletion
           kwindowsystem kcrash karchive ki18n kdoctools kfilemetadata
           kjobwidgets kpty kunitconversion kcodecs) + # kdesupport/phonon/phonon
        %w(knotifications kpackage kguiaddons kconfigwidgets kitemviews
           kiconthemes attica kdbusaddons kservice kglobalaccel sonnet
           ktextwidgets breeze-icons kxmlgui kbookmarks solid kwallet kio
           kdeclarative kcmutils kplotting kparts kdewebkit kdesignerplugin
           kemoticons kjs knewstuff kinit kjsembed knotifyconfig kded
           kross kmediaplayer kdesu ktexteditor kactivities kactivities-stats
           kdnssd kidletime kitemmodels threadweaver oxygen-icons5
           plasma-framework kxmlrpcclient kpeople frameworkintegration
           kdelibs4support krunner khtml kwayland kf5umbrella baloo)
# padding
parts = [nil] + parts
# parts += [nil]
parts.each_cons(2) do |first_name, second_name|
  # puts "#{second_name} AFTER #{first_name}"
  next unless second_name # first item is nil
  part = SnapcraftConfig::Part.new
  part.after = [first_name] if first_name # last item is also nil
  part.source = "http://download.kde.org/stable/frameworks/5.26/#{second_name}-5.26.0.tar.xz"
  config.parts[second_name] = part
end

puts File.write('new', YAML.dump(config, indentation: 4))