From: Michal Suchanek <hramrach@...>
Date: 2010-05-23T20:28:23+09:00
Subject: Ruby one-file launcher that sets up environment?

Hello

I am trying to run some JRuby script and I have to set the CLASSPATH
for my script to work.

I use a launcher locally so I can run the script as

./scripts/mylauncher script.rb

but if I wanted to distribute a sample script this is somewhat troublesome.

I tried to embed the ruby code in a shell script but as Ruby refuses
to read the code from stdin this is not quite nice:

#!/bin/sh
CLASSPATH=<something> jruby -e '
<some code that does not use single quotes>
' "$@"

Note that while this example uses JRuby there might be native
extensions which require specific environment settings and woud have
the same launcher requirements.

If somebody had a better idea for a launcher it would be nice.

Thanks

Michal