[Rubygems-developers] Customizing rubygems via #{RUBY_ENGINE}.rb

Eric Hodel drbrain at segment7.net
Wed Jun 25 17:46:42 EDT 2008

On Jun 25, 2008, at 14:10 PM, Vladimir Sizikov wrote:
> I'm currently in a process of upgrading JRuby trunk with the latest
> rubygems 1.2, and
> trying to use the new feature to provide some JRuby specific
> customization to rubygems via
> #{RUBY_ENGINE}.rb file.
> It worked very well in some cases, but I'm facing some problems when I
> try to customize
> things like commands, since that RUBY_ENGINE.rb file is loaded at the
> end of rubygems.rb
> file but *before* other things like commands are loaded.
> Here are some use cases that I'd like to resolve somehow:
> 1. gem install and gem update commands. I'd like to customize the
> default options.
>   More specifically, to enable env_shebang option.

I think Gem::ConfigFile can be changed to set this as default.  I'll  
explore it.

> 2. installer.rb has shebang(bin_file_name) method that works not
> ideally with JRuby on Windows,
>   and I'd like to provide customized version of that.

How do you want to change shebang?  Maybe we can make the change in  
the installer instead.

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