Library/Homebrew/cask/lib/hbc/container/tar.rb


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require "tmpdir"

require "hbc/container/base"

class Hbc::Container::Tar < Hbc::Container::Base
  def self.me?(criteria)
    criteria.magic_number(%r{^.{257}ustar}n) ||
      # or compressed tar (bzip2/gzip/lzma/xz)
      IO.popen(["/usr/bin/tar", "-t", "-f", criteria.path.to_s], err: "/dev/null") { |io| !io.read(1).nil? }
  end

  def extract
    Dir.mktmpdir do |unpack_dir|
      @command.run!("/usr/bin/tar", args: ["-x", "-f", @path, "-C", unpack_dir])
      @command.run!("/usr/bin/ditto", args: ["--", unpack_dir, @cask.staged_path])
    end
  end
end