get a list of nicknames used by a series of hosts from the UnrealIRCd connects log.

get_nicks_by_hosts.rb

#!/usr/bin/env ruby
# A simple script to get a list of nicknames used by a series of hosts from the UnrealIRCd connects log.
require 'set'

CONNECTS_LOG_PATH = File.expand_path('~/UnrealIRCd/logs/connects.log')
hosts = ARGV
if hosts.size == 0
  puts('Get a list of nicknames used by a series of hosts from the UnrealIRCd connects log.')
  abort('Usage: get_nicks_by_hosts host1 [host2] [..] [hostn]')
end

def get_nick(line)
  cols = line.split(' ')
  return cols[7] if line.include?('JOIN')
  return cols[7] if line.include?('PART')
  return cols[8].split('!')[0] if line.include?('Connect')
  return cols[9].split('!')[0] if line.include?('Disconnect')
end

used_nicks = Set.new
hosts.each do |host|
  lines = `grep #{host} #{CONNECTS_LOG_PATH}`.squeeze(' ').strip.split("\n")
  lines.each do |line|
    if nick = get_nick(line)
      used_nicks << nick
    end
  end
end

puts used_nicks.to_a.sort.join("\n")
nil