Simple background processing

application.rb

# config/application.rb

def Rails.bg_runner(code)
  ruby_cmd = code.gsub(/("|\s)/) {|m| "\\#{m}" }
  cmd = %{cd #{Rails.root} && ./script/background #{Rails.env} "#{ruby_cmd}"}

  Rails.logger.info "IN BACKGROUND #{cmd}"
  Rails.logger.info system(cmd)
end

background

#!/usr/bin/env ruby

require "pathname"
raise "no env specified" unless ARGV.first

`echo '#{ARGV.inspect}' >> /tmp/1`
if !fork
  Process.setsid
  
  STDIN.reopen '/dev/null'
  STDOUT.reopen '/tmp/1', 'a'
  STDERR.reopen STDOUT
  
  dir = Pathname.new(__FILE__).dirname.join("..").expand_path
  env = ARGV.shift
  code = ARGV.first.to_s.gsub(/('|\s)/) {|m| "\\#{m}" }
  command = %{RAILS_ENV=#{env} cd #{dir} && bundle exec rails runner '#{code}'}
  puts command
  `#{command}`
else
  puts "ok"
end