devhosts

#!/usr/bin/env ruby

section_start = '## devstart -- section marker - do not touch'
section_end = '## devend -- section marker - do not touch'

ips = {
  :vidal     => '3.141',
  :jose      => '3.138',
  :alejandro => '3.139',
  :roberto   => '3.140',
  :alex      => '3.157',

  :javier    => '2.221',
  :jason     => '2.222',
  :ian       => '2.227',
  :ulises    => '2.224',
  :juozas    => '2.235'
}

apps = %w{ao av aw se th}

prepared_block =
  "#{section_start}\n" +
  ips.map do |name, ip|
    "192.168.#{ip} " +
    apps.map do |app|
      "#{name}.#{app}.dev"
    end.join(' ')
  end.join("\n") +
  "\n#{section_end}"

contents = File.read('/etc/hosts')
unless( contents.sub!( /#{section_start}.*#{section_end}/m, prepared_block ))
  contents += "\n#{prepared_block}\n"
end

File.open('/etc/hosts', 'w') do |io|
  io.puts contents
end

__END__