module GitFyncy

# File lib/git-fyncy.rb, line 13
def self.already_running?
  return false unless File.exists? PID_FNAME
  begin
    Process.kill 0, old_pid
    true
  rescue Errno::ESRCH
    false
  end
end

# File lib/git-fyncy.rb, line 23
def self.kill
  if already_running?
    if Process.kill "TERM", old_pid
      File.delete PID_FNAME
    else
      pexit "Failed to kill process with id #{old_pid}"
    end
  else
    pexit "No process to kill. No #{PID_FNAME} file."
  end
end

# File lib/git-fyncy.rb, line 36
def self.main(args)
  working_dir = `git rev-parse --show-toplevel`.chomp

  pexit 'Must be in a git repository' if working_dir.empty?

  Dir.chdir working_dir
  return kill if args.include? "--kill"
  if already_running?
    pexit "#{PID_FNAME} exists. Is git fyncy already running?"
  end

  rsync_args = args.reject { |arg| FLAGS.include? arg }
  # Listen in the background if one of the args was '--fork'.
  background = args.include? "--fork"

  synchronizer = Synchronizer.new background, rsync_args
  unless synchronizer.sync
    pexit "\nGIT FYNCY: First remote command failed, exiting"
  end

  File.write PID_FNAME, Process.pid
  trap("INT") do
    File.delete PID_FNAME
    pexit "Exiting happily!"
  end
  synchronizer.listen
end

# File lib/git-fyncy.rb, line 9
def self.old_pid
  @_old_pid ||= File.read(PID_FNAME).to_i
end