how to make command line program without using language name first

Question

When I run a ruby program from the command line, I have to add "ruby" at the beginning of the command (ex. 'ruby hangman.rb'). My question is, how do I make a command line program without having to use 'ruby' in front to run the program. I know this has to be possible because RoR is written in ruby and you don't have to run "ruby rails [command]", you just run "rails". Any Ideas?

If you are on windows, you may want to compile ruby. stackoverflow.com/questions/9998819/… — James T Kirk
– James T Kirk, Commented Jan 21, 2018 at 21:29
This is documented heavily. You'll want to look up discussions on bin — RubyGems has a nice guide on making an executable, guides.rubygems.org/make-your-own-gem/#adding-an-executable — Josh Brody
– Josh Brody, Commented Jan 21, 2018 at 21:30
Rails is a gem. Gems are generally run from somewhere in your PATH. See also gem env. — Todd A. Jacobs
– Todd A. Jacobs, Commented Jan 21, 2018 at 22:31

Martin · Accepted Answer · 2018-01-22 17:33:58Z

1

Best option would be to bundle it as a Gem - this allows to define an executable.

Another a bit "hacky" option would be to create a hangman.bat file that would just call ruby hangman.rb

Note that both cases would still require ruby to be installed on any target computer.

answered Jan 22, 2018 at 17:33

Martin

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