Class: FPM::Fry::Tar::Extractor

Inherits:
Object
  • Object
show all
Defined in:
lib/fpm/fry/tar.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Extractor

Returns a new instance of Extractor.



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# File 'lib/fpm/fry/tar.rb', line 7

def initialize( options = {} )
  @logger = options.fetch(:logger){ Cabin::Channel.get }
end

Instance Method Details

#chown(uid, gid, path) ⇒ Object 



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# File 'lib/fpm/fry/tar.rb', line 53

def chown( uid, gid, path )
  FileUtils.chown( uid, gid, path )
rescue Errno::EPERM
  @logger.warn('Unable to chown file', 'file' => path, 'uid' => uid, 'gid' => gid)
end

#extract(destdir, reader, options = {}) ⇒ Object 



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# File 'lib/fpm/fry/tar.rb', line 11

def extract(destdir, reader, options = {})
  reader.each do |entry|
    extract_entry(File.join(destdir, entry.full_name), entry, options)
  end
end

#extract_entry(dest, entry, options = {}) ⇒ Object 



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# File 'lib/fpm/fry/tar.rb', line 17

def extract_entry(dest, entry, options = {})
  full_name = entry.full_name
  mode = entry.header.mode

  destdir = File.dirname(dest)
  uid = map_user(entry.header.uid, entry.header.uname)
  gid = map_group(entry.header.gid, entry.header.gname)

  @logger.debug('Extracting','file' => dest, 'uid'=> uid, 'gid' => gid, 'entry.fullname' => full_name, 'entry.mode' => mode )

  case(entry.header.typeflag)
  when "5" # Directory
    FileUtils.mkdir_p(dest, :mode => mode)
  when "2" # Symlink
    destdir = File.dirname(dest)
    FileUtils.mkdir_p(destdir, :mode => 0755)
    File.symlink( entry.header.linkname, dest )
  when "0" # File
    destdir = File.dirname(dest)
    FileUtils.mkdir_p(destdir, :mode => 0755)
    File.open(dest, "wb", entry.header.mode) do |os|
      loop do
        data = entry.read(4096)
        break unless data
        os.write(data)
      end
      os.fsync
    end
  else
    @logger.warn('Ignoring unknown tar entry',name: full_name)
    return
  end
  FileUtils.chmod(entry.header.mode, dest)
  chown( uid, gid, dest ) if options.fetch(:chown,true)
end

#map_group(gid, _) ⇒ Object 



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# File 'lib/fpm/fry/tar.rb', line 63

def map_group( gid, _ )
  return gid
end

#map_user(uid, _) ⇒ Object 



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# File 'lib/fpm/fry/tar.rb', line 59

def map_user( uid, _ )
  return uid
end