#! /usr/bin/ruby

=begin
--------------------------------------------------------------------------------

Choose a version from among the subdirectories in the versions directory and
record that choice.

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
=end

begin
  require File.expand_path('subscripts/common', File.dirname(__FILE__))
rescue LoadError => e
  puts e
end

@version_parms_file = "#{@home}/scripts/subscripts/_current_version.rb"

# Find out what versions we have available
def build_version_list()
  @version_names = []
  Dir.foreach("#{@home}/versions") do |filename|
    @version_names.push(filename) unless (filename[0,1] == "_") || (filename[0,1] == ".")
  end
  @version_names.sort!
  raise "Found no version directories." unless @version_names.length > 0
end

# Write the current version to the file
def write_current_version(name)
  File.open(@version_parms_file, "w") do |file|
    file.puts "# what is the current version under test?"
    file.puts "@version_name = '#{name}'"
  end
  puts "version set to #{name}"
end

#
# ---------------------------------------------------------
# MAIN ROUTINE
# ---------------------------------------------------------
#

build_version_list()

puts "Enter version number: "
@version_names.each_index do |index|
  puts "                      #{index+1} = #{@version_names[index]}" 
end
number = STDIN.gets.chomp.to_i

if number <= 0 || number > @version_names.length
  puts "UNRECOGNIZED VERSION." 
  exit
end

write_current_version(@version_names[number - 1])