Class: Gem::Commands::SingCommand

Inherits:
Gem::Command
  • Object
show all
Includes:
LocalRemoteOptions, VersionOption, MIDIator::Drums, MIDIator::Notes
Defined in:
lib/rubygems/commands/sing_command.rb

Overview

gem command to “sing” the implementation of a gem.

Constant Summary collapse

VERSION = 
'1.2.1'

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SingCommand

Returns a new instance of SingCommand.



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# File 'lib/rubygems/commands/sing_command.rb', line 23

def initialize
  super("sing", "\"Sing\" a gem's implementation",
        :version => Gem::Requirement.default)

  add_version_option
  add_local_remote_options
end

Instance Method Details

#arguments ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/sing_command.rb', line 31

def arguments # :nodoc:
  'GEMNAME       name of an installed gem to sing'
end

#defaults_str ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/sing_command.rb', line 35

def defaults_str # :nodoc:
  "--version='>= 0'"
end

#execute ⇒ Object 



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# File 'lib/rubygems/commands/sing_command.rb', line 43

def execute
  name = get_one_gem_name

  base = files = nil

  if remote? then
    version = options[:version] || Gem::Requirement.default
    all = Gem::Requirement.default
    dep = Gem::Dependency.new name, version

    specs_and_sources = Gem::SpecFetcher.fetcher.fetch dep

    spec, source_uri = specs_and_sources.sort_by { |spec,| spec.version }.last

    alert_error "Could not find #{name} in any repository" unless spec

    gem_path = File.join "/tmp", spec.file_name

    unless File.file? gem_path then
      path = Gem::RemoteFetcher.fetcher.download spec, source_uri
      FileUtils.mv path, gem_path
    end

    dir_path = File.join "/tmp", File.basename(gem_path, '.gem')

    unless File.directory? dir_path then
      FileUtils.mkdir_p dir_path
      Gem::Installer.new(gem_path, :unpack => true).unpack dir_path
    end

    Dir.chdir dir_path do
      files = spec.require_paths.map { |d| Dir["#{d}/**/*.rb"] }.flatten.sort
    end

    base = dir_path
  else
    dep = Gem::Dependency.new name, options[:version]
    specs = Gem.source_index.search dep

    if specs.empty? then
      alert_error "No installed gem #{dep}"
      terminate_interaction 1
    end

    spec  = specs.last
    base  = spec.full_gem_path
    files = spec.lib_files
  end

  $stdout.sync = true

  ##
  # Special thanks to Ben Bleything for midiator and help getting
  # this up and running!

  midi = MIDIator::Interface.new
  midi.use :dls_synth

  # blues scale
  scale = [ C4, Eb4, F4, Fs4, G4, Bb4,
            C5, Eb5, F5, Fs5, G5, Bb5,
            C6, Eb6, F6, Fs6, G6, Bb6 ]

  midi.control_change 32, 10, 1 # TR-808 is Program 26 in LSB bank 1
  midi.program_change 10, 26

  # TODO: eventually add ability to play actual AST

  files.each do |path|
    full_path = File.join base, path

    next unless File.file? full_path # rails is run by MORONS

    warn path

    line_number_of_last_end = 0
    File.foreach full_path do |line|
      if line =~ /^(\s+)end$/ then
        distance = $INPUT_LINE_NUMBER - line_number_of_last_end
        note_character = "♩"
        duration = case distance
                   when 0 .. 3
                     note_character = "♪"
                     0.125
                   when 4 .. 10
                     note_character = "♩"
                     0.25
                   when 11 .. 30
                     note_character = "d"
                     0.5
                   else
                     note_character = "o"
                     1.0
                   end
        line_number_of_last_end = $INPUT_LINE_NUMBER
        num_spaces = $1.size

        print "#{note_character} "
        print line
        midi.play scale[ num_spaces / 2 ], duration
        print "\n" * (duration * 4).to_i if Gem.configuration.really_verbose
      end
    end

    [ HighTom1, HighTom2, LowTom1, LowTom2 ].each do |note|
      midi.play note, 0.067, 10
    end

    midi.play CrashCymbal1, 0.25, 10
  end

  midi.play CrashCymbal2, 0.25, 10
  sleep 1.0
end

#usage ⇒ Object

:nodoc:



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# File 'lib/rubygems/commands/sing_command.rb', line 39

def usage # :nodoc:
  "#{program_name} GEMNAME [options]"
end