Class: Gem::Indexer

Inherits:
Object show all
Includes:
UserInteraction
Defined in:
lib/rubygems/indexer.rb

Overview

Top level class for building the gem repository index.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from UserInteraction

#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction, #verbose

Methods included from DefaultUserInteraction

ui, #ui, ui=, #ui=, use_ui, #use_ui

Methods included from Text

#clean_text, #format_text, #levenshtein_distance, #min3, #truncate_text

Constructor Details

#initialize(directory, options = {}) ⇒ Indexer

Create an indexer that will index the gems in directory.



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# File 'lib/rubygems/indexer.rb', line 45

def initialize(directory, options = {})
  require 'fileutils'
  require 'tmpdir'
  require 'zlib'

  options = { :build_modern => true }.merge options

  @build_modern = options[:build_modern]

  @dest_directory = directory
  @directory = Dir.mktmpdir 'gem_generate_index'

  marshal_name = "Marshal.#{Gem.marshal_version}"

  @master_index = File.join @directory, 'yaml'
  @marshal_index = File.join @directory, marshal_name

  @quick_dir = File.join @directory, 'quick'
  @quick_marshal_dir = File.join @quick_dir, marshal_name
  @quick_marshal_dir_base = File.join "quick", marshal_name # FIX: UGH

  @quick_index = File.join @quick_dir, 'index'
  @latest_index = File.join @quick_dir, 'latest_index'

  @specs_index = File.join @directory, "specs.#{Gem.marshal_version}"
  @latest_specs_index =
    File.join(@directory, "latest_specs.#{Gem.marshal_version}")
  @prerelease_specs_index =
    File.join(@directory, "prerelease_specs.#{Gem.marshal_version}")
  @dest_specs_index =
    File.join(@dest_directory, "specs.#{Gem.marshal_version}")
  @dest_latest_specs_index =
    File.join(@dest_directory, "latest_specs.#{Gem.marshal_version}")
  @dest_prerelease_specs_index =
    File.join(@dest_directory, "prerelease_specs.#{Gem.marshal_version}")

  @files = []
end

Instance Attribute Details

#build_modern ⇒ Object

Build indexes for RubyGems 1.2.0 and newer when true



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# File 'lib/rubygems/indexer.rb', line 15

def build_modern
  @build_modern
end

#dest_directory ⇒ Object (readonly)

Index install location



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# File 'lib/rubygems/indexer.rb', line 20

def dest_directory
  @dest_directory
end

#dest_latest_specs_index ⇒ Object (readonly)

Latest specs index install location



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# File 'lib/rubygems/indexer.rb', line 30

def dest_latest_specs_index
  @dest_latest_specs_index
end

#dest_prerelease_specs_index ⇒ Object (readonly)

Prerelease specs index install location



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# File 'lib/rubygems/indexer.rb', line 35

def dest_prerelease_specs_index
  @dest_prerelease_specs_index
end

#dest_specs_index ⇒ Object (readonly)

Specs index install location



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# File 'lib/rubygems/indexer.rb', line 25

def dest_specs_index
  @dest_specs_index
end

#directory ⇒ Object (readonly)

Index build directory



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# File 'lib/rubygems/indexer.rb', line 40

def directory
  @directory
end

Instance Method Details

#build_indices ⇒ Object

Build various indices



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# File 'lib/rubygems/indexer.rb', line 87

def build_indices
  specs = map_gems_to_specs gem_file_list
  Gem::Specification._resort! specs
  build_marshal_gemspecs specs
  build_modern_indices specs if @build_modern

  compress_indices
end

#build_marshal_gemspecs(specs) ⇒ Object

Builds Marshal quick index gemspecs.



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# File 'lib/rubygems/indexer.rb', line 99

def build_marshal_gemspecs(specs)
  count = specs.count
  progress = ui.progress_reporter count,
                                  "Generating Marshal quick index gemspecs for #{count} gems",
                                  "Complete"

  files = []

  Gem.time 'Generated Marshal quick index gemspecs' do
    specs.each do |spec|
      next if spec.default_gem?
      spec_file_name = "#{spec.original_name}.gemspec.rz"
      marshal_name = File.join @quick_marshal_dir, spec_file_name

      marshal_zipped = Gem.deflate Marshal.dump(spec)

      File.open marshal_name, 'wb' do |io|
        io.write marshal_zipped
      end

      files << marshal_name

      progress.updated spec.original_name
    end

    progress.done
  end

  @files << @quick_marshal_dir

  files
end

#build_modern_index(index, file, name) ⇒ Object

Build a single index for RubyGems 1.2 and newer



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# File 'lib/rubygems/indexer.rb', line 135

def build_modern_index(index, file, name)
  say "Generating #{name} index"

  Gem.time "Generated #{name} index" do
    File.open(file, 'wb') do |io|
      specs = index.map do |*spec|
        # We have to splat here because latest_specs is an array, while the
        # others are hashes.
        spec = spec.flatten.last
        platform = spec.original_platform

        # win32-api-1.0.4-x86-mswin32-60
        unless String === platform
          alert_warning "Skipping invalid platform in gem: #{spec.full_name}"
          next
        end

        platform = Gem::Platform::RUBY if platform.nil? or platform.empty?
        [spec.name, spec.version, platform]
      end

      specs = compact_specs(specs)
      Marshal.dump(specs, io)
    end
  end
end

#build_modern_indices(specs) ⇒ Object

Builds indices for RubyGems 1.2 and newer. Handles full, latest, prerelease



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# File 'lib/rubygems/indexer.rb', line 165

def build_modern_indices(specs)
  prerelease, released = specs.partition do |s|
    s.version.prerelease?
  end
  latest_specs =
    Gem::Specification._latest_specs specs

  build_modern_index(released.sort, @specs_index, 'specs')
  build_modern_index(latest_specs.sort, @latest_specs_index, 'latest specs')
  build_modern_index(prerelease.sort, @prerelease_specs_index,
                     'prerelease specs')

  @files += [@specs_index,
             "#{@specs_index}.gz",
             @latest_specs_index,
             "#{@latest_specs_index}.gz",
             @prerelease_specs_index,
             "#{@prerelease_specs_index}.gz"]
end

#compact_specs(specs) ⇒ Object

Compacts Marshal output for the specs index data source by using identical objects as much as possible.



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# File 'lib/rubygems/indexer.rb', line 233

def compact_specs(specs)
  names = {}
  versions = {}
  platforms = {}

  specs.map do |(name, version, platform)|
    names[name] = name unless names.include? name
    versions[version] = version unless versions.include? version
    platforms[platform] = platform unless platforms.include? platform

    [names[name], versions[version], platforms[platform]]
  end
end

#compress(filename, extension) ⇒ Object

Compress filename with extension.



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# File 'lib/rubygems/indexer.rb', line 250

def compress(filename, extension)
  data = Gem.read_binary filename

  zipped = Gem.deflate data

  File.open "#{filename}.#{extension}", 'wb' do |io|
    io.write zipped
  end
end

#compress_indices ⇒ Object

Compresses indices on disk – All future files should be compressed using gzip, not deflate



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# File 'lib/rubygems/indexer.rb', line 217

def compress_indices
  say "Compressing indices"

  Gem.time 'Compressed indices' do
    if @build_modern
      gzip @specs_index
      gzip @latest_specs_index
      gzip @prerelease_specs_index
    end
  end
end

#gem_file_list ⇒ Object

List of gem file names to index.



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# File 'lib/rubygems/indexer.rb', line 263

def gem_file_list
  Gem::Util.glob_files_in_dir("*.gem", File.join(@dest_directory, "gems"))
end

#generate_index ⇒ Object

Builds and installs indices.



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# File 'lib/rubygems/indexer.rb', line 270

def generate_index
  make_temp_directories
  build_indices
  install_indices
rescue SignalException
ensure
  FileUtils.rm_rf @directory
end

#gzip(filename) ⇒ Object

Zlib::GzipWriter wrapper that gzips filename on disk.



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# File 'lib/rubygems/indexer.rb', line 282

def gzip(filename)
  Zlib::GzipWriter.open "#{filename}.gz" do |io|
    io.write Gem.read_binary(filename)
  end
end

#install_indices ⇒ Object

Install generated indices into the destination directory.



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# File 'lib/rubygems/indexer.rb', line 291

def install_indices
  verbose = Gem.configuration.really_verbose

  say "Moving index into production dir #{@dest_directory}" if verbose

  files = @files
  files.delete @quick_marshal_dir if files.include? @quick_dir

  if files.include? @quick_marshal_dir and not files.include? @quick_dir
    files.delete @quick_marshal_dir

    dst_name = File.join(@dest_directory, @quick_marshal_dir_base)

    FileUtils.mkdir_p File.dirname(dst_name), :verbose => verbose
    FileUtils.rm_rf dst_name, :verbose => verbose
    FileUtils.mv(@quick_marshal_dir, dst_name,
                 :verbose => verbose, :force => true)
  end

  files = files.map do |path|
    path.sub(/^#{Regexp.escape @directory}\/?/, '') # HACK?
  end

  files.each do |file|
    src_name = File.join @directory, file
    dst_name = File.join @dest_directory, file

    FileUtils.rm_rf dst_name, :verbose => verbose
    FileUtils.mv(src_name, @dest_directory,
                 :verbose => verbose, :force => true)
  end
end

#make_temp_directories ⇒ Object

Make directories for index generation



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# File 'lib/rubygems/indexer.rb', line 327

def make_temp_directories
  FileUtils.rm_rf @directory
  FileUtils.mkdir_p @directory, :mode => 0700
  FileUtils.mkdir_p @quick_marshal_dir
end

#map_gems_to_specs(gems) ⇒ Object 



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# File 'lib/rubygems/indexer.rb', line 185

def map_gems_to_specs(gems)
  gems.map do |gemfile|
    if File.size(gemfile) == 0
      alert_warning "Skipping zero-length gem: #{gemfile}"
      next
    end

    begin
      spec = Gem::Package.new(gemfile).spec
      spec.loaded_from = gemfile

      spec.abbreviate
      spec.sanitize

      spec
    rescue SignalException
      alert_error "Received signal, exiting"
      raise
    rescue Exception => e
      msg = ["Unable to process #{gemfile}",
             "#{e.message} (#{e.class})",
             "\t#{e.backtrace.join "\n\t"}"].join("\n")
      alert_error msg
    end
  end.compact
end

#paranoid(path, extension) ⇒ Object

Ensure path and path with extension are identical.



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# File 'lib/rubygems/indexer.rb', line 336

def paranoid(path, extension)
  data = Gem.read_binary path
  compressed_data = Gem.read_binary "#{path}.#{extension}"

  unless data == Gem::Util.inflate(compressed_data)
    raise "Compressed file #{compressed_path} does not match uncompressed file #{path}"
  end
end

#update_index ⇒ Object

Perform an in-place update of the repository from newly added gems.



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# File 'lib/rubygems/indexer.rb', line 348

def update_index
  make_temp_directories

  specs_mtime = File.stat(@dest_specs_index).mtime
  newest_mtime = Time.at 0

  updated_gems = gem_file_list.select do |gem|
    gem_mtime = File.stat(gem).mtime
    newest_mtime = gem_mtime if gem_mtime > newest_mtime
    gem_mtime >= specs_mtime
  end

  if updated_gems.empty?
    say 'No new gems'
    terminate_interaction 0
  end

  specs = map_gems_to_specs updated_gems
  prerelease, released = specs.partition {|s| s.version.prerelease? }

  files = build_marshal_gemspecs specs

  Gem.time 'Updated indexes' do
    update_specs_index released, @dest_specs_index, @specs_index
    update_specs_index released, @dest_latest_specs_index, @latest_specs_index
    update_specs_index(prerelease,
                       @dest_prerelease_specs_index,
                       @prerelease_specs_index)
  end

  compress_indices

  verbose = Gem.configuration.really_verbose

  say "Updating production dir #{@dest_directory}" if verbose

  files << @specs_index
  files << "#{@specs_index}.gz"
  files << @latest_specs_index
  files << "#{@latest_specs_index}.gz"
  files << @prerelease_specs_index
  files << "#{@prerelease_specs_index}.gz"

  files = files.map do |path|
    path.sub(/^#{Regexp.escape @directory}\/?/, '') # HACK?
  end

  files.each do |file|
    src_name = File.join @directory, file
    dst_name = File.join @dest_directory, file # REFACTOR: duped above

    FileUtils.mv src_name, dst_name, :verbose => verbose,
                 :force => true

    File.utime newest_mtime, newest_mtime, dst_name
  end
end

#update_specs_index(index, source, dest) ⇒ Object

Combines specs in index and source then writes out a new copy to dest. For a latest index, does not ensure the new file is minimal.



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# File 'lib/rubygems/indexer.rb', line 410

def update_specs_index(index, source, dest)
  specs_index = Marshal.load Gem.read_binary(source)

  index.each do |spec|
    platform = spec.original_platform
    platform = Gem::Platform::RUBY if platform.nil? or platform.empty?
    specs_index << [spec.name, spec.version, platform]
  end

  specs_index = compact_specs specs_index.uniq.sort

  File.open dest, 'wb' do |io|
    Marshal.dump specs_index, io
  end
end