Updating gem 1 3
If you would like to push gems to a private gem server the RUBYGEMS_HOST environment variable can be set to the URI for that server.If you are packaging Ruby Gems all of Ruby Gems’ defaults are in lib/rubygems/
The dependency list can be displayed in a format suitable for piping for use with other commands.
This can be overridden with the –no-wrappers option.
The wrapper allows you to choose among alternate gem versions using when a gem dependencies file (rb, Gemfile or Isolate) is present.
GEM_PATH allows multiple local repositories to be searched for gems.
If you are behind a proxy server, Ruby Gems uses the HTTP_PROXY, HTTP_PROXY_USER and HTTP_PROXY_PASS environment variables to discover the proxy server.