Programmatically getting FULL Ruby version?

Question

I know it\'s possible to get the Ruby version (e.g. \"1.9.3\") via the RUBY_VERSION constant. However, I want to know how to go about determining the exact version

Answer 1

At least in the newest Ruby (2.3.0), there is also a RUBY_DESCRIPTION constant:

RUBY_DESCRIPTION
# => "ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]"

Answer 2

There is a RUBY_PATCHLEVEL constant as well. So you can get your version string as

"#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}"