How do I find the ruby interpreter?

Question

Inside a ruby script, how do I get the path to the ruby interpreter?

Example script:

  #!/path/to/ruby
  puts `#{RUBY_INTERPRETER_PATH} -e \"puts \'h         


        

Answer 1

To get the path of the currently running ruby interpreter:

require 'rbconfig'
RUBY_INTERPRETER_PATH = File.join(RbConfig::CONFIG["bindir"],
                                  RbConfig::CONFIG["RUBY_INSTALL_NAME"] +
                                  RbConfig::CONFIG["EXEEXT"])