Tried some Gem commands

gistfile1.txt

./bin/jruby -X+T -S gem -v
2.4.6

./bin/jruby -X+T -S gem -h
RubyGems is a sophisticated package manager for Ruby.  This is a
basic help message containing pointers to more information.

  Usage:
    gem -h/--help
    gem -v/--version
    gem command [arguments...] [options...]

  Examples:
    gem install rake
    gem list --local
    gem build package.gemspec
    gem help install

  Further help:
    gem help commands            list all 'gem' commands
    gem help examples            show some examples of usage
    gem help gem_dependencies    gem dependencies file guide
    gem help platforms           gem platforms guide
    gem help <COMMAND>           show help on COMMAND
                                   (e.g. 'gem help install')
    gem server                   present a web page at
                                 http://localhost:8808/
                                 with info about installed gems
  Further information:
    http://guides.rubygems.org


./bin/jruby -X+T -S gem install --local /Users/brandonfish/Documents/rake
/Users/brandonfish/Documents/jruby/lib/ruby/truffle/mri/rubygems/core_ext/../../../../stdlib/rubygems/core_ext/kernel_require.rb:54: warning: zlib not yet implemented
ERROR:  Loading command: install (LoadError)
	cannot load such file -- digest
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for NilClass
    
./bin/jruby -X+T -S gem list
ERROR:  Loading command: list (LoadError)
	cannot load such file -- net/http
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for NilClass

./bin/jruby -X+T -S gem install rails
/Users/brandonfish/Documents/jruby/lib/ruby/truffle/mri/rubygems/core_ext/../../../../stdlib/rubygems/core_ext/kernel_require.rb:54: warning: zlib not yet implemented
ERROR:  Loading command: install (LoadError)
	cannot load such file -- digest
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for NilClass

./bin/jruby -X+T -S gem search rails
ERROR:  Loading command: search (LoadError)
	cannot load such file -- net/http
ERROR:  While executing gem ... (NoMethodError)
    undefined method `invoke_with_build_args' for NilClass
    
./bin/jruby -X+T -S gem which rake
ERROR:  Can't find ruby library file or shared library rake