.handgunignore

~$
\.DS_Store$

handgun

#!/usr/bin/env ruby
require 'rubygems'
require 'eventmachine'

if ARGV.size < 1
  STDERR.puts 'command required'
  STDERR.puts 'e.g.  handgun ruby test.rb'
  exit 1
end

puts cmd = ARGV.join(' ')
pid = nil
last = 0

@ignores = Array.new
@ignores << /\/\..+/ # dotfile
if File.exists? Dir.pwd+'/.handgunignore'
  open(Dir.pwd+'/.handgunignore').readlines.each{|line|
    line.gsub!(/[\r\n]/,'')
    if line.size > 0
      @ignores << /#{line}/
    end
  }
end

def last_update
  tmp = Array.new
  for i in 1..3 do
    tmp << Dir.glob(Dir.pwd+'/*'*i).delete_if{|f| File::ftype(f) != 'file'}
  end
  tmp.flatten!
  files = Array.new
  tmp.each{|f|
    unless @ignores.map{|ig| 
        res = true if f =~ ig
        res
      }.include?(true)
      files << f
    end
  }
  files.map{|f| File::mtime(f).to_i}.max
end

EventMachine::run do

  EventMachine::defer do
    loop do
      now = last_update
      if last < now and pid == nil
        last = now
        IO.popen(cmd){|io|
          pid = io.pid
          loop do
            res = io.gets
            break unless res
            puts res
            sleep 0.1
          end
        }
        pid = nil
      end
      sleep 0.1
    end
  end

  EventMachine::defer do
    loop do
      now = last_update
      if last < now and pid
        puts "-- kill (pid:#{pid}), reload at #{Time.now} --"
        `kill #{pid}`
        pid = nil
      end
      sleep 0.1
    end
  end
  
end