Running under launchd

Contributed by @jarajapu

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>localhost.camper_van</string>
    <key>EnvironmentVariables</key>
    <dict>
      <key>PATH</key>
      <string>$HOME/.rvm/gems/ruby-1.9.3-p327@global/bin:$HOME/.rvm/rubies/ruby-1.9.3-p327/bin:$PATH</string>
      <key>GEM_PATH</key>
      <string>$HOME/.rvm/gems/ruby-1.9.3-p327@global:$HOME/.rvm/gems/ruby-1.9.3-p327</string>
    </dict>
    <key>ProgramArguments</key>
    <array>
      <string>$HOME/.rvm/gems/ruby-1.9.3-p327@global/bin/bundle</string>
      <string>exec</string>
      <string>$PROJECT_ROOT/camper_van_exec/bin/camper_van</string>
    </array>
    <key>WorkingDirectory</key>
    <string>$PROJECT_ROOT/camper_van_exec</string>
    <key>UserName</key>
    <string>$USER</string>
    <key>StandardOutPath</key>
    <string>$PROJECT_ROOT/camper_van_exec/logs/camper_van.log</string>
    <key>StandardErrorPath</key>
    <string>$PROJECT_ROOT/camper_van_exec/logs/camper_van_errors.log</string>
    <key>RunAtLoad</key>
    <true/>
    <key>KeepAlive</key>
    <true/>
  </dict>
</plist>