gen-dhcp.rb

#!/usr/bin/ruby

require 'optparse'
require 'csv'

class StaticDhcpLease
  attr_accessor :host, :mac, :ip

  def initialize(hostname, mac, ip)
    @host  = hostname
    @mac   = mac
    @ip  = ip
  end

  def to_s
   out = "host " + @host + " {\n"
   out << "  hardware ethernet " + @mac + ";\n"
   out << "  fixed-address " + @ip + ";\n"
   out << "}\n"
   out
  end

  def self.find_by_name(hostname)
    r = nil
    ObjectSpace.each_object(StaticDhcpLease) { |o|
      r = o if o.host == hostname
    }
    r
  end

  def self.print_all
    ObjectSpace.each_object(StaticDhcpLease) { |o|
      puts o
      puts "\n"
    }
  end

end

csvData = Array.new
leases  = Array.new
opt     = OptionParser.new

input   = 'inventory-export-current.csv'

opt.on("--input [FILE]", "-f", String, "Puppet inventory export file (CSV)") do |f|
  input = f
end

opt.parse!

CSV.open(input, 'r', ';') do |row|
  hostname = row[0]
 
  if StaticDhcpLease.find_by_name(hostname) == nil
    StaticDhcpLease.new(hostname, '', '')
  else
    row[1] =~ /(.*)address/
    match = $1
    StaticDhcpLease.find_by_name(hostname).send("#{match}=".to_sym, row[2])
  end 
   
end

StaticDhcpLease.print_all