SketchUp Embedded Ruby System module

SketchUp_Ruby_System.rb

# encoding: UTF-8
#
# Boilerplate Ideas for SketchUp Embedded Ruby System module.

if (Sketchup.platform == :platform_win rescue RUBY_PLATFORM !~ /darwin/)

  module System # for MS Windows

    require 'win32ole'

    extend self

    def is_windows?
      true
    end

    def is_macos?
      false
    end

    WIN = true
    MAC = false

    # Request the value of an environment variable.
    # @param var [String] The variable name requested.
    # @return [String] On MS Windows this returns strings encoded as UTF-8.
    # @return [nil] if the variable name does not exist.
    def get_env(var)
      unless var.respond_to?(:to_s)
        fail(TypeError,'String (or coercible) argument expected.',caller)
      end
      WIN32OLE.new('WScript.Shell').ExpandEnvironmentStrings("%#{var}%")
    end

    # The computer or hostname assigned to the system.
    def computer_name
      get_env('ComputerName')
    end

    # The name of the current user.
    def user_name
      get_env('Username')
    end

  end # System

else

  module System # for MacOS

    extend self

    def is_windows?
      false
    end

    def is_macos?
      true
    end

    WIN = false
    MAC = true

    # The computer or hostname assigned to the system.
    def computer_name
      ENV['HOST'] || ENV['HOSTNAME'] || `hostname`
    end

    # Request the value of an environment variable.
    # @param var [String] The variable name requested.
    # @return [String] On MacOS the ENV object returns strings encoded as UTF-8.
    # @return [nil] if the variable name does not exist.
    def get_env(var)
      unless var.respond_to?(:to_s)
        fail(TypeError,'String (or coercible) argument expected.',caller)
      end
      ENV["#{var}"]
    end

    # The name of the current user.
    def user_name
      ENV['USER']
    end

  end # System

end # platform conditional definitions