namespace :hets do

HETS_LOGFILE = Rails.root.join('log', 'hets.log')

HETS_PIDFILE = Rails.root.join('tmp', 'pids', 'hets.pid')

HETS_CMD = "hets -X"

desc 'Start a hets server'

task :start do

if already_running?

puts 'Hets is already running...'

else

pid = spawn(HETS_CMD, [:out, :err] => [HETS_LOGFILE, 'w'])

write_pid(pid)

Process.detach(pid)

end

end

desc 'Stop a running hets server'

task :stop do

if already_running?

pid = fetch_pid

system("kill #{pid}")

remove_pidfile

else

puts 'Hets is not running...'

end

end

desc 'Run a hets server synchronously'

task :run do

exec(HETS_CMD)

end

def already_running?

HETS_PIDFILE.exist?

end

def write_pid(pid)

File.open(HETS_PIDFILE, 'a') do |f|

f.write(pid)

end

end

def fetch_pid

pid = nil

File.open(HETS_PIDFILE, 'r') do |f|

pid = f.read

end

pid

end

def remove_pidfile

FileUtils.rm HETS_PIDFILE

end

end