What sits in YOUR_PLUGIN_base.rb ?

So what exactly sits in the files that were mentioned in the last post ?
Let's start with YOUR_PLUGIN_base. rb file.

	#---------Plugin Info---------------------------------------------------------
	#-----------------------------------------------------------------------------
	# Name :
	# Copyright : (c) 2013
	# Designed : Author
	# Icons by :
	# Description : Opis
	# Menu Item : Plugins > YOUR_PLUGIN MENU
	# Context Menu: N/A
	# Usage :
	# Date :
	#-----------------------------------------------------------------------------
	# Permission to use, copy, modify this software for
	# any non-commercial purpose is hereby granted
	#-----------------------------------------------------------------------------
	# CHANGELOG:
	#
	#-----------------------------------------------------------------------------
	require "sketchup.rb"
	require "YOUR_LIB.rb"
	require "YOUR_PLUGIN/YOUR_PLUGIN.rb"
	if !file_loaded?(__FILE__) then
	#---menu----------------------------------------------------------------------
	YOUR_PLUGIN_menu = UI.menu("plugins").add_submenu("YOUR_PLUGIN")
	#---toolbar-------------------------------------------------------------------
	YOUR_PLUGIN_tb = UI::Toolbar.new("YOUR_PLUGIN")
	#---command-------------------------------------------------------------------
	cmd = UI::Command.new("YOUR_PLUGIN") {YOUR_PLUGIN.new()}
	cmd.small_icon = "YOUR_PLUGIN/YOUR_ICONs.png"
	cmd.large_icon = "YOUR_PLUGIN/YOUR_ICON.png"
	cmd.tooltip = "YOUR_PLUGIN"
	cmd.status_bar_text = "YOUR_PLUGIN"
	cmd.menu_text = "YOUR_PLUGIN"
	YOUR_PLUGIN_tb.add_item(cmd)
	YOUR_PLUGIN_menu.add_item("YOUR_PLUGIN") {YOUR_PLUGIN.new()}
	#-----------------------------------------------------------------------------
	end
	#-----------------------------------------------------------------------------
	file_loaded( File.basename(__FILE__) )
	#-----------------------------------------------------------------------------

view raw YOUR_PLUGIN_base.rb hosted with ❤ by GitHub

Lines 1 to 19 are description of the plugin, this part should be quite obvious. 
Lines 21, 22 and 23 are call-outs for 3 files that are necesary for our plugin to function.

"sketchup.rb" includes all genereal ruby function definitions that sketchup normaly uses,

"YOUR_LIB.rb" includes definitions of Your functions and

"YOUR_PLUGIN.rb" includes definition of tour plugin.

Lines from 25 are executed only if this file was not already loaded.

Line 27 adds new submenu YOUR_PLUGIN to Sketchup's Plugin menu.

Line 29 adds new toolbar YOUR_PLUGIN to Sketchup.

Line 33 defines a new comand "cmd , which calls out a new tool  - YOUR_PLUGIN.

Line 34 and 35 show path to icons that will sit in toolbar.

Line 36 is a tooltip - a text that will appeara whrn you hold a cursor above your toolbar.

Line 37 -  sets the status bar text for your plugin

Line 38 -  sets the menu item name for your plugin

Lines 39 and 40 - add YOUR_PLUGIN tool to new menu and toolbar