a build server that is smaller and less capable than cijoe

minibuild.rb

require 'sinatra'

CODE_PATH      = '/repo/lives/here'
RVM_COMMAND    = '[[ -s $HOME/.rvm/scripts/rvm ]] && source $HOME/.rvm/scripts/rvm'
UPDATE_COMMAND = 'git pull'
BUILD_COMMAND  = 'bundle && rake db:migrate && rake'

def log(message='')
  File.open('build.log', 'a') {|log| log.puts "#{Time.now.utc} #{message}" }
end

get '/*' do
  `tail -n 1 build.log` 
end

# POST from a github webhook triggers a build
post '/*' do
  log 'building...'
  build_process = fork { exec "/bin/bash -c '#{RVM_COMMAND} && cd #{CODE_PATH} && #{BUILD_COMMAND}'" }
  Process.waitpid(build_process)

  if $?.exitstatus.to_i == 0
    log 'pass'
    system "cd #{CODE_PATH} && .git/hooks/build-worked"
  else
    log 'fail'
    system "cd #{CODE_PATH} && .git/hooks/build-failed"
  end
end