如何更改gem环境设置？
我安装了rbenv并设置了ruby和gem。 现在，如果我运行gem env那么我得到以下内容：
RubyGems Environment: - RUBYGEMS VERSION: 2.2.2 - RUBY VERSION: 2.1.0 (2013-12-25 patchlevel 0) [x86_64-darwin13.0] - INSTALLATION DIRECTORY: /Users/myusername/Tools/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0 - RUBY EXECUTABLE: /Users/myusername/Tools/.rbenv/versions/2.1.0/bin/ruby - EXECUTABLE DIRECTORY: /Users/myusername/Tools/.rbenv/versions/2.1.0/bin - SPEC CACHE DIRECTORY: /Users/myusername/.gem/specs - RUBYGEMS PLATFORMS: - ruby - x86_64-darwin-13 - GEM PATHS: - /Users/myusername/Tools/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0 - /Users/myusername/.gem/ruby/2.1.0 - GEM CONFIGURATION: - :update_sources => true - :verbose => true - :backtrace => false - :bulk_threshold => 1000 - REMOTE SOURCES: - https://rubygems.org/ - SHELL PATH: - /Users/myusername/Tools/.rbenv/versions/2.1.0/bin - /Users/myusername/Tools/.rbenv/libexec - /Users/myusername/Tools/.rbenv/plugins/ruby-build/bin - /opt/local/bin - /opt/local/sbin - /Users/myusername/Tools/.rbenv/shims - /usr/bin - /bin - /usr/sbin - /sbin - /usr/local/bin - /Users/myusername/Tools/./bin - /Users/myusername/Tools/.rbenv/bin
嗯……除了SPEC CACHE DIRECTORY和GEM PATHS ，所有其他都有自我配置的路径。 （所以我真的不希望任何与dev相关的目录直接放在我的用户主文件夹中。）有没有办法灵活地改变这两个env variables而不影响ruby ， gem和rbenv等的正常运行？
谢谢！
实际上我在网上搜索并找到了解决方案。
只需将以下内容放在.profile（Max OS）或.bashrc（Linux）中
export GEM_PATH=/Users/myusername/Tools/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0 export GEM_SPEC_CACHE=/Users/myusername/Tools/.rbenv/versions/2.1.0/lib/ruby/gems/specs
确保您放置的文件夹存在。 然后获取.profile或.bashrc，或者只是重新启动终端。 它经过测试工作，现在我的环境是正确的。
参考： https ： //github.com/rubygems/rubygems/pull/489