Class: Uas2Git::Migration

Inherits:
Object
  • Object
show all
Defined in:
lib/uas2git/migration.rb

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Migration

Returns a new instance of Migration.



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# File 'lib/uas2git/migration.rb', line 8

def initialize(args)
  @options = parse(args)

  show_help_message('Missing PROJECT_NAME parameter') if args.empty?
  show_help_message('Too many arguments') if args.size > 1

  @project_name = args.first

  begin
    show_help_message('The repository must be empty') unless Rugged::Repository.new('.').empty?
  rescue
  end

  if @options[:password].nil? then
    @options[:password] = ask('Enter password for ' + @options[:username] + '@' + @options[:host] + ': ') { |q| q.echo = false }
  end
end

Instance Method Details

#parse(args) ⇒ Object 



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# File 'lib/uas2git/migration.rb', line 153

def parse(args)
  # Set up reasonable defaults for options.
  options = {}
  options[:host] = 'localhost'
  options[:username] = 'admin'
  options[:password] = nil

  @opts = OptionParser.new do |opts|
    opts.banner = 'Usage: uas2git PROJECT_NAME [options]'

    opts.separator ''
    opts.separator 'Specific options:'

    opts.on('-H', '--host NAME', 'Unity Asset Server host') do |host|
      options[:host] = host
    end

    opts.on('-u', '--username NAME', 'Crendential for Unity Asset Server') do |username|
      options[:username] = username
    end

    opts.on('-p', '--password PASSWD') do |password|
      options[:password] = password
    end

    opts.separator ''

    # No argument, shows at tail.  This will print an options summary.
    # Try it and see!
    opts.on_tail('-h', '--help', 'Show this message') do
      puts opts
      exit
    end
  end

  @opts.parse! args
  options
end

#run! ⇒ Object 



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# File 'lib/uas2git/migration.rb', line 26

def run!
  ActiveRecord::Base.establish_connection(
      :adapter  => 'postgresql',
      :host     => @options[:host],
      :port     => '10733',
      :username => @options[:username],
      :password => @options[:password],
      :database => @project_name
  )

  # Initialize a git repository
  repo = Progress.start('Initializing a git repository', 1) do
    Progress.step do
      Rugged::Repository.init_at('.')
    end
  end

  # Import files
  oids = {}
  meta_oids = {}

  asset_versions = Uas2Git::Uas::Model::AssetVersion.joins(:type).where('assettype.description <> \'dir\'')
  Progress.start('Importing ' + asset_versions.count.to_s + ' files', asset_versions.count) do
    asset_versions.find_each do |asset_version|
      Progress.step do
        asset_version.contents.each do |contents|
          blob = ''

          asset_version.transaction do
            fd = asset_version.class.connection.raw_connection.lo_open(contents.stream, PG::INV_READ)

            loop do
              data = asset_version.class.connection.raw_connection.lo_read(fd, 65536)
              break if data == nil || data.empty?

              blob += data
            end

            asset_version.class.connection.raw_connection.lo_close(fd)
          end

          oid = repo.write(blob, :blob)

          if contents.tag == 'asset' then
            oids[asset_version.asset.serial] = {} if oids[asset_version.asset.serial].nil?
            oids[asset_version.asset.serial][asset_version.revision] = oid
          elsif contents.tag == 'asset.meta' then
            meta_oids[asset_version.asset.serial] = {} if meta_oids[asset_version.asset.serial].nil?
            meta_oids[asset_version.asset.serial][asset_version.revision] = oid
          end
        end
      end
    end
  end

  # Precalculating directory paths from changesets
  dirs = {}
  prev_changeset = nil

  Progress.start('Precalculating directory paths', Uas2Git::Uas::Model::Changeset.count) do
    Uas2Git::Uas::Model::Changeset.find_each do |changeset|
      Progress.step do
        dirs[changeset.serial] = prev_changeset ? dirs[prev_changeset.serial].clone : {}

        changeset.asset_versions.joins(:type).where('assettype.description = \'dir\'').find_each do |asset_version|
          if asset_version.parent then
            dirs[changeset.serial][asset_version.asset.serial] = dirs[changeset.serial][asset_version.parent.serial] + '/' + asset_version.name
          else
            dirs[changeset.serial][asset_version.asset.serial] = asset_version.name
          end
        end

        prev_changeset = changeset
      end
    end
  end

  # Importing changesets
  Progress.start('Importing ' + Uas2Git::Uas::Model::Changeset.count.to_s + ' changesets', Uas2Git::Uas::Model::Changeset.count) do
    Uas2Git::Uas::Model::Changeset.find_each do |changeset|
      Progress.step do
        index = Rugged::Index.new

        Uas2Git::Uas::Model::AssetVersion.joins(:type).where('assettype.description <> \'dir\'').where(
            'created_in <= :c AND assetversion.serial IN (SELECT assetversion FROM changesetcontents WHERE changesetcontents.changeset <= :c) AND revision = (SELECT MAX(revision) FROM assetversion AV2 WHERE AV2.asset = assetversion.asset AND AV2.created_in <= :c)',
            { :c => changeset.serial }
        ).find_each do |asset_version|
          if asset_version.parent then
            path = dirs[changeset.serial][asset_version.parent.serial] + '/' + asset_version.name
          else
            path = 'ProjectSettings/' + asset_version.name
          end

          if !path.start_with?('Trash/') then
            index.add(:path => path, :oid => oids[asset_version.asset.serial][asset_version.revision], :mode => 0100644)
            if meta_oids.has_key?(asset_version.asset.serial) then
              index.add(:path => path + '.meta', :oid => meta_oids[asset_version.asset.serial][asset_version.revision], :mode => 0100644)
            end
          end
        end

        author = {
            :name => changeset.creator.username,
            :email => '',
            :time => changeset.commit_time.nil? ? Time.now : changeset.commit_time
        }

        Rugged::Commit.create(repo, {
            :tree => index.write_tree(repo),
            :author => author,
            :committer => author,
            :message => changeset.description,
            :parents => repo.empty? ? [] : [ repo.head.target ].compact,
            :update_ref => 'HEAD'
        })
      end
    end
  end

  # Checking out the working copy
  Progress.start('Checking out the work tree', 1) do
    Progress.step do
      repo.reset('HEAD', :hard)
    end
  end
end

#show_help_message(msg) ⇒ Object 



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# File 'lib/uas2git/migration.rb', line 192

def show_help_message(msg)
  puts "Error starting script: #{msg}\n\n"
  puts @opts.help
  exit
end