class Gem::Commands::OpenCommand

# File lib/rubygems/commands/open_command.rb, line 11
def initialize
  super 'open', 'Open gem sources in editor'

  add_option('-e', '--editor COMMAND', String,
             "Prepends COMMAND to gem path. Could be used to specify editor.") do |command, options|
    options[:editor] = command || get_env_editor
  end
  add_option('-v', '--version VERSION', String,
             "Opens specific gem version") do |version|
    options[:version]  = version
  end
end

# File lib/rubygems/commands/open_command.rb, line 52
def execute
  @version = options[:version] || Gem::Requirement.default
  @editor  = options[:editor] || get_env_editor

  found = open_gem(get_one_gem_name)

  terminate_interaction 1 unless found
end

# File lib/rubygems/commands/open_command.rb, line 45
def get_env_editor
  ENV['GEM_EDITOR'] ||
    ENV['VISUAL'] ||
    ENV['EDITOR'] ||
    'vi'
end

# File lib/rubygems/commands/open_command.rb, line 74
def open_editor(path)
  Dir.chdir(path) do
    system(*@editor.split(/\s+/) + [path])
  end
end

# File lib/rubygems/commands/open_command.rb, line 61
def open_gem(name)
  spec = spec_for name

  return false unless spec

  if spec.default_gem?
    say "'#{name}' is a default gem and can't be opened."
    return false
  end

  open_editor(spec.full_gem_path)
end

# File lib/rubygems/commands/open_command.rb, line 80
def spec_for(name)
  spec = Gem::Specification.find_all_by_name(name, @version).first

  return spec if spec

  say "Unable to find gem '#{name}'"
end