class Mixlib::Archive::LibArchive

def create(files, gzip: false)
  compression = gzip ? ::Archive::COMPRESSION_GZIP : ::Archive::COMPRESSION_NONE
  # "PAX restricted" will use PAX extensions when it has to, but will otherwise
  # use ustar for maximum compatibility
  format = ::Archive::FORMAT_TAR_PAX_RESTRICTED
  ::Archive.write_open_filename(archive, compression, format) do |tar|
    files.each do |fn|
      tar.new_entry do |entry|
        content = nil
        entry.pathname = fn
        stat = File.lstat(fn)
        if File.file?(fn)
          content = File.read(fn, mode: "rb")
          entry.size = content.bytesize
        end
        entry.mode = stat.mode
        entry.filetype = resolve_type(stat.ftype)
        entry.atime = stat.atime
        entry.mtime = stat.mtime
        entry.symlink = File.readlink(fn) if File.symlink?(fn)
        tar.write_header(entry)
        tar.write_data(content) unless content.nil?
      end
    end
  end
end

def extract(destination, perms: true, ignore: [])
  ignore_re = Regexp.union(ignore)
  flags = perms ? ::Archive::EXTRACT_PERM : nil
  FileUtils.mkdir_p(destination)
  reader = ::Archive::Reader.open_filename(@archive)
  reader.each_entry do |entry|
    if entry.pathname =~ ignore_re
      Mixlib::Archive::Log.warn "ignoring entry #{entry.pathname}"
      next
    end
    reader.extract(entry, flags.to_i, destination: destination)
  end
  reader.close
end

def initialize(archive, options = {})
  @archive = archive
  @options = options
end

def resolve_type(type)
  case type
  when "characterSpecial"
    ::Archive::Entry::CHARACTER_SPECIAL
  when "blockSpecial"
    ::Archive::Entry::BLOCK_SPECIAL
  when "link"
    ::Archive::Entry::SYMBOLIC_LINK
  else
    ::Archive::Entry.const_get(type.upcase)
  end
end