When I run gem environment I get a list which includes the following:
- GEM PATHS:
- /home/rescue/.rvm/rubies/ruby-2.3.3/lib/ruby/gems/2.3.0
- /home/rescue/.gem/ruby/2.3.0
I'd like to add a path. I see people suggesting to add something like export GEM_PATH = ... to my .bashrc file, but I fear this would replace the existing gem paths.
How can I add another path in addition to the ones that already exist?
I think it is not possible to just add path without override.
Answer your question is in
https://github.com/rubygems/rubygems/blob/master/lib/rubygems.rb#L404
when 'GEM_HOME', 'GEM_PATH', 'GEM_SPEC_CACHE'
....
@paths = Gem::PathSupport.new ENV.to_hash.merge(target)
Code is complicated, but you can read that you can set path only by one of these 'GEM_HOME', 'GEM_PATH', 'GEM_SPEC_CACHE' variables.
Then gem put these variables as constructor to Gem::PathSupport where paths are set.
https://github.com/rubygems/rubygems/blob/master/lib/rubygems/path_support.rb
GEM_PATH=XXXX:
(NOTE: should ends with a colon)