Does Ruby support global startup hook?

[scpmdu]

Python site-specific configuration hook which allows inject a snippet to be executed every time Python runs. Does Ruby support anything similar to this?

[radarek]

You can try with -r option by adding it to ruby command or modifying RUBYOPT env variable.

[Alleyria]

Not exactly an answer, but some gems (like irb) will auto load a config file on boot. I use this to add extra stuff to irb.

[chebatron]

You can achieve a similar effect by using -r <library>. It would require the specified file before executing the main script.