Class: Backup::Instance

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root_path, cloud = false, *args) ⇒ Instance

Returns a new instance of Instance.



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# File 'lib/backup.rb', line 13

def initialize(root_path, cloud = false, *args)
  if cloud
    @file_item = Backup::FileItem.for :cloud, *args
  else
    @file_item = Backup::FileItem.for :local
  end

  @hostname = Socket.gethostname
  @_root_path = @root_path
  @root_path = "#{root_path}/#{@hostname}"
  @timestamp = Backup::Timestamp.create
end

Instance Attribute Details

#compression ⇒ Object

Returns the value of attribute compression.



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# File 'lib/backup.rb', line 11

def compression
  @compression
end

#file_item ⇒ Object (readonly)

Returns the value of attribute file_item.



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# File 'lib/backup.rb', line 11

def file_item
  @file_item
end

#hostname ⇒ Object

Returns the value of attribute hostname.



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# File 'lib/backup.rb', line 11

def hostname
  @hostname
end

#root_path ⇒ Object (readonly)

Returns the value of attribute root_path.



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# File 'lib/backup.rb', line 11

def root_path
  @root_path
end

#timestamp ⇒ Object (readonly)

Returns the value of attribute timestamp.



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# File 'lib/backup.rb', line 11

def timestamp
  @timestamp
end

Instance Method Details

#create!(local_path, increment = false, purge_previous = false) ⇒ Object 



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# File 'lib/backup.rb', line 43

def create! local_path, increment = false, purge_previous = false
  jar = Jar.new @file_item, @root_path, local_path, @key
  jar.save increment, @compression, purge_previous
end

#jar_versions(jar) ⇒ Object 



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# File 'lib/backup.rb', line 52

def jar_versions jar
  Jar.jar_versions @file_item, @root_path, jar, !!jar[/^[0-9a-z]{32}$/]
end

#jars ⇒ Object 



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# File 'lib/backup.rb', line 48

def jars
  Jar.all @file_item, @root_path
end

#restore_jar_to(hash, timestamp, to) ⇒ Object 



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# File 'lib/backup.rb', line 56

def restore_jar_to(hash, timestamp, to)
  files = Jar.fetch_index_for(@file_item, @root_path, hash, timestamp)
  puts_fail "Jar doesn't exists" if files.nil?

  unless files[:checksum].nil?
    if @key.nil? or
       @key.decrypt(Base64.decode64(files[:checksum])) != timestamp

      puts_fail "Checksum does not match."
    end
    files.delete :checksum
  end

  unless files[:compression].nil?
    compression = Archive.new files[:compression].to_sym
    files.delete :compression
  else
    compression = nil
  end

  pbar = ProgressBar.new(
    "Restoring",
    files.keys.length
  )
  pbar.bar_mark = '*'

  files.keys.sort.each do |file|
    restore_file = File.join(to, file)
    current_file = files[file]

    if current_file[:checksum].nil?
      try_create_dir restore_file

      File.chmod current_file[:mode], restore_file
      File.chown current_file[:uid], current_file[:gid], restore_file

      file_ok = @file_item.stat(restore_file)[restore_file]

      check_mode(restore_file, file_ok[:mode], current_file[:mode])
      check_rights(
        restore_file,
        file_ok[:uid],
        file_ok[:gid],
        current_file[:uid],
        current_file[:gid]
      )
    else
      try_create_dir(File.dirname restore_file)

      begin
        File.open(restore_file, "wb") do |f|
          f.chmod current_file[:mode]
          f.chown current_file[:uid], current_file[:gid]

          remote_path = "#{@root_path}/#{hash}/#{current_file[:timestamp]}"
          remote_path += "/#{@file_item.file_hash file}"

          data = @file_item.read_file(remote_path)
          data = @key.decrypt_from_stream data if @key

          unless compression.nil?
            data = compression.decompress(data).read
          end

          f.print data
        end

        file_ok = @file_item.stat(restore_file)[restore_file]

        check_mode(restore_file, file_ok[:mode], current_file[:mode])
        check_rights(
          restore_file,
          file_ok[:uid],
          file_ok[:gid],
          current_file[:uid],
          current_file[:gid]
        )
      rescue Errno::EACCES
        puts_fail "Permission denied for #{restore_file.dark_green}"
      end
    end

    pbar.inc
  end

  pbar.finish
end

#rsa_key(path, size) ⇒ Object 



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# File 'lib/backup.rb', line 35

def rsa_key path, size
  if File.exists? path
    @key = Crypto::Key.from_file(path, size)
  else
    @key = nil
  end
end