/usr/lib/ruby/2.3.0/tkextlib/vu.rb is in ruby2.3-tcltk 2.3.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# The vu widget set support
# by Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)
#
require 'tk'
# call setup script for general 'tkextlib' libraries
require 'tkextlib/setup.rb'
# call setup script
require 'tkextlib/vu/setup.rb'
# load package
# TkPackage.require('vu', '2.1')
TkPackage.require('vu')
# autoload
module Tk
module Vu
TkComm::TkExtlibAutoloadModule.unshift(self)
PACKAGE_NAME = 'vu'.freeze
def self.package_name
PACKAGE_NAME
end
def self.package_version
begin
TkPackage.require('vu')
rescue
''
end
end
##########################################
autoload :Dial, 'tkextlib/vu/dial'
autoload :Pie, 'tkextlib/vu/pie'
autoload :PieSlice, 'tkextlib/vu/pie'
autoload :NamedPieSlice, 'tkextlib/vu/pie'
autoload :Spinbox, 'tkextlib/vu/spinbox'
autoload :Bargraph, 'tkextlib/vu/bargraph'
end
end
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