add a chruby-exec bin script

[postmodern]

Add a chruby-exec bin script that would select the desired ruby, then run another command under it.

chruby-exec jruby --1.9 -- command

This would be useful for people needing to run Ruby scripts via cron jobs.

[robin850]

Hi,

Just giving a 👍 for this !

[postmodern]

Now that I think about it, chruby-exec would just be syntactic sugar for:

bash -lc "chruby 1.9.3 && command --options"

[postmodern]

@robin850 @havenwood I hacked up a prototype for chruby-exec. It seems to work on bash and zsh.

[marius]

I would use the version without the sugar. Just to keep it clear and simple :)

[postmodern]

OK, I'm going to close this as YAGNI. Without chruby-exec, we force the developer/admin to explicitly choose the shell to run the command under (never assume /bin/sh -> /bin/bash). It also forces the developer/admin to explicitly write two commands chruby X.Y.Z && command, where as chruby-exec RUBY -- COMMAND expects a -- deliminator between the ruby version and the command; which I expect to be a common stumbling block.

[postmodern]

This has been released in 0.3.0.