Module: Unpacker

Defined in:
lib/unpacker.rb

Defined Under Namespace

Classes: UnrecognizedArchiveError

Class Method Summary collapse

Class Method Details

.archive?(file_name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/unpacker.rb', line 58

def self.archive?(file_name)
  supported = Unpacker.supported_archives
  ext = File.extname(file_name).sub('.', '')
  return true if ext==""
  support = supported.include? ext
  if !support
    help = case file_name
    when /(tar|tgz|tar\.gz|tar\.bz|tbz|tar\.bz2)$/
      "Please install tar"
    when /zip$/
      "Please install unzip"
    when /gz$/
      "Please install gunzip"
    when /bz2$/
      "Please install bunzip2"
    else
      raise UnrecognizedArchiveError
    end
    msg = "Archive type not supported: #{ext}\n#{help}"
    raise UnrecognizedArchiveError.new(msg)
  end
  support
end

.supported_archives ⇒ Object 



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# File 'lib/unpacker.rb', line 103

def self.supported_archives
  supported = []
  if !which('unrar').empty?
    supported << "rar"
  end
  if !which('tar').empty?
    %w[tar tgz tgz tar.gz tar.bz tar.bz2 tbz].each do |ext|
      supported << ext
    end
  end
  if !which('unzip').empty?
    supported << "zip"
  end
  if !which('gunzip').empty?
    supported << "gz"
  end
  if !which('bunzip2').empty?
    supported << "bz2"
  end
  supported
end

.unpack(file, tmpdir = "/tmp", &block) ⇒ Object 



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# File 'lib/unpacker.rb', line 34

def self.unpack(file, tmpdir = "/tmp", &block)
  Dir.mktmpdir 'unpacker' do |dir|
    cmd = case file
          when /(tar|tgz|tar\.gz)$/
            "tar xzf #{file} --directory #{dir}"
          when /(tar\.bz|tbz|tar\.bz2)$/
            "tar xjf #{file} --directory #{dir}"
          when /zip$/
            "unzip #{file} -d #{dir}"
          when /gz$/
            "gunzip #{file}"
          when /bz2$/
            "bunzip #{file}"
          else
            raise UnrecognizedArchiveError
          end
    stdout, stderr, status = Open3.capture3 cmd
    if !status.success?
      raise RuntimeError.new("There was a problem unpacking #{file}\n#{stderr}")
    end
    block.call Dir.new(dir)
  end
end

.valid?(file_path, file_name = file_path) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/unpacker.rb', line 82

def self.valid?(file_path, file_name = file_path)
  cmd = case file_name
        when /(tar|tar\.bz|tbz)$/
          "tar tf #{file_path}"
        when /zip$/
          "zip -T #{file_path}"
        when /gz|tgz$/
          "gunzip -t #{file_path}"
        when /bz2$/
          "bunzip2 -t #{file_path}"
        else
          raise UnrecognizedArchiveError
        end
  stdout, stderr, status = Open3.capture3 cmd
  if status.success?
    true
  else
    false
  end
end