Class: Spawnpoint::Synchronizer

Inherits:
Object
  • Object
show all
Defined in:
lib/spawnpoint/synchronizer.rb

Constant Summary collapse

BACKUP_DIR = 
".spwn_sync_backup"

Instance Method Summary collapse

Instance Method Details

#rollback(argv) ⇒ Object 



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# File 'lib/spawnpoint/synchronizer.rb', line 150

def rollback(argv)
  target = parse_rollback_args(argv)
  unless target
    puts "Usage: spwn rollback --into <game-folder>"
    return 1
  end

  target = Pathname.new(target).expand_path
  backup = target.join(BACKUP_DIR)
  unless backup.directory?
    puts "Oops: there is no lesson sync to roll back in #{target}."
    return 1
  end

  backup.join("created_paths").readlines.each do |line|
    target.join(line.strip).delete if !line.strip.empty? && target.join(line.strip).file?
  end
  backup.join("files").find do |saved|
    next if saved.directory? || saved == backup.join("files")
    rel = saved.relative_path_from(backup.join("files"))
    dest = target.join(rel)
    FileUtils.mkdir_p(dest.parent)
    FileUtils.cp(saved, dest)
  end

  marker = target.join(".spwn_synced_paths")
  if backup.join("marker").file?
    FileUtils.cp(backup.join("marker"), marker)
  else
    marker.delete if marker.file?
  end

  FileUtils.rm_rf(backup)
  puts "Rolled back the most recent lesson sync."
  0
end

#run(argv) ⇒ Object 



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# File 'lib/spawnpoint/synchronizer.rb', line 28

def run(argv)
  lesson_folder, into_folder, force = parse_args(argv)

  unless lesson_folder
    puts "Usage:"
    puts "  spwn sync <lesson-folder> --into <game-folder>"
    puts "  spwn sync <lesson-folder> --into <game-folder> --force"
    puts ""
    puts "Example:"
    puts "  spwn sync 04-collectibles/starter --into ~/DragonRuby/mygame"
    puts ""
    puts "The first time a lesson copies a file that already exists in your"
    puts "game folder, spwn asks before replacing it. After you accept a"
    puts "file, later lessons replace that same file automatically."
    return 1
  end

  unless into_folder
    puts "Oops: tell spwn where to copy the lesson with --into."
    puts "Example: spwn sync 04-collectibles/starter --into ~/DragonRuby/mygame"
    return 1
  end

  source = Pathname.new(lesson_folder).expand_path
  target = Pathname.new(into_folder).expand_path

  unless source.directory?
    puts "Oops: #{source} is not a folder."
    return 1
  end

  unless target.directory?
    puts "Oops: #{target} is not a folder yet."
    return 1
  end

  has_assets = source.join("assets").directory?

  if has_assets
    puts "This lesson includes an assets/ folder."
    puts "Assets may look different from the previous lesson."
    puts "If you already have sprites from an older lesson, you will be asked before each one is replaced."
    puts ""
  end

  marker = target.join(".spwn_synced_paths")
  backup = target.join(BACKUP_DIR)
  FileUtils.rm_rf(backup)
  backup.join("files").mkpath
  backup.join("created_paths").write("")
  if marker.file?
    FileUtils.cp(marker, backup.join("marker"))
  else
    backup.join("no_marker").write("")
  end

  known = if marker.file?
    marker.readlines.map(&:strip).reject(&:empty?).to_set
  else
    Set.new
  end

  already_existed = Set.new
  target.find.each do |child|
    next unless child.file?
    already_existed << child.relative_path_from(target).to_s
  end

  copied = 0
  upgraded = 0
  skipped = 0
  new_known = Set.new

  source.find.to_a.each do |child|
    next unless child.file?

    rel = child.relative_path_from(source)
    rel_s = rel.to_s
    dest = target.join(rel)

    if dest.exist?
      if force || known.include?(rel_s)
        backup_existing(backup, dest, rel_s)
        copy_file(child, dest)
        upgraded += 1
        new_known << rel_s
      elsif already_existed.include?(rel_s)
        if agree?("Copy #{rel} from this lesson?")
          backup_existing(backup, dest, rel_s)
          copy_file(child, dest)
          upgraded += 1
          new_known << rel_s
        else
          skipped += 1
        end
      end
    else
      copy_file(child, dest)
      File.open(backup.join("created_paths"), "a") { |fh| fh.puts(rel_s) }
      copied += 1
      new_known << rel_s
    end
  end

  merged = known | new_known
  if merged.any?
    marker.open("w") do |fh|
      merged.to_a.sort.each do |name|
        fh.puts(name)
      end
    end
  end

  puts ""
  puts "Done."
  puts "New:       #{copied}"
  puts "Updated:   #{upgraded}"
  puts "Skipped:   #{skipped}"

  0
end