Class: Gel::Package

Inherits:
Object
  • Object
show all
Defined in:
lib/gel/package.rb,
lib/gel/package/inspector.rb

Defined Under Namespace

Classes: Inspector, Installer, Specification, YAMLLoader

Class Method Summary collapse

Class Method Details

.extract(filename, receiver) ⇒ Object 



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# File 'lib/gel/package.rb', line 123

def self.extract(filename, receiver)
  File.open(filename) do |io|
    Gel::Support::Tar::TarReader.new(io) do |package_reader|
      sums = with_file(package_reader, "checksums.yaml.gz", nil) do |sum_stream|
        yaml = Zlib::GzipReader.new(sum_stream).read

        if Psych::VERSION < "3.1" # Ruby 2.5 & below
          ::YAML.safe_load(yaml, [], [], false, "#{filename}:checksums.yaml.gz")
        else
          ::YAML.safe_load(yaml, filename: "#{filename}:checksums.yaml.gz")
        end
      end

      spec = with_file(package_reader, "metadata.gz", sums) do |meta_stream|
        yaml = Zlib::GzipReader.new(meta_stream).read
        loaded = YAMLLoader.load(yaml, "#{filename}:metadata.gz")
        Specification.new(loaded)
      end or raise "no metadata.gz"

      return receiver.gem(spec) do |target|
        with_file(package_reader, "data.tar.gz", sums) do |data_stream|
          Gel::Support::Tar::TarReader.new(Zlib::GzipReader.new(data_stream)) do |data_reader|
            data_reader.each do |entry|
              target.file(entry.full_name, entry, entry.header.mode)
            end
          end
          true
        end or raise "no data.tar.gz"
      end
    end
  end
end

.with_file(reader, filename, checksums) ⇒ Object 



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# File 'lib/gel/package.rb', line 106

def self.with_file(reader, filename, checksums)
  reader.seek(filename) do |stream|
    if checksums
      data = stream.read
      stream.rewind

      checksums.each do |type, map|
        next unless %w(SHA1 SHA512).include?(type)
        calculated = Digest(type).hexdigest(data)
        raise "#{type} checksum mismatch on #{filename}" unless calculated == map[filename]
      end
    end

    yield stream
  end
end