def execute
out = ''
arg = options[:args][0]
case arg
when /^packageversion/ then
out << Gem::RubyGemsPackageVersion
when /^version/ then
out << Gem::RubyGemsVersion
when /^gemdir/, /^gemhome/, /^home/, /^GEM_HOME/ then
out << Gem.dir
when /^gempath/, /^path/, /^GEM_PATH/ then
out << Gem.path.join(File::PATH_SEPARATOR)
when /^remotesources/ then
out << Gem.sources.join("\n")
when nil then
out = "RubyGems Environment:\n"
out << " - RUBYGEMS VERSION: #{Gem::RubyGemsVersion}\n"
out << " - RUBY VERSION: #{RUBY_VERSION} (#{RUBY_RELEASE_DATE}"
out << " patchlevel #{RUBY_PATCHLEVEL}" if defined? RUBY_PATCHLEVEL
out << ") [#{RUBY_PLATFORM}]\n"
out << " - INSTALLATION DIRECTORY: #{Gem.dir}\n"
out << " - RUBYGEMS PREFIX: #{Gem.prefix}\n" unless Gem.prefix.nil?
out << " - RUBY EXECUTABLE: #{Gem.ruby}\n"
out << " - EXECUTABLE DIRECTORY: #{Gem.bindir}\n"
out << " - RUBYGEMS PLATFORMS:\n"
Gem.platforms.each do |platform|
out << " - #{platform}\n"
end
out << " - GEM PATHS:\n"
out << " - #{Gem.dir}\n"
path = Gem.path.dup
path.delete Gem.dir
path.each do |p|
out << " - #{p}\n"
end
out << " - GEM CONFIGURATION:\n"
Gem.configuration.each do |name, value|
out << " - #{name.inspect} => #{value.inspect}\n"
end
out << " - REMOTE SOURCES:\n"
Gem.sources.each do |s|
out << " - #{s}\n"
end
else
fail Gem::CommandLineError, "Unknown enviroment option [#{arg}]"
end
say out
true
end