首先我用 Ruby 2.6.3 安装了 fluidd。
$ rbenv versions
* system (set by /Users/jing/.rbenv/version)
2.7.5
$ gem
gem env
RubyGems Environment:
- RUBYGEMS VERSION: 3.0.3
- RUBY VERSION: 2.6.3 (2019-04-16 patchlevel 62) [universal.x86_64-darwin19]
- INSTALLATION DIRECTORY: /Users/jing/.gem
- USER INSTALLATION DIRECTORY: /Users/jing/.gem/ruby/2.6.0
- RUBY EXECUTABLE: /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
- GIT EXECUTABLE: /usr/bin/git
- EXECUTABLE DIRECTORY: /Users/jing/.gem/bin
- SPEC CACHE DIRECTORY: /Users/jing/.gem/specs
- SYSTEM CONFIGURATION DIRECTORY: /Library/Ruby/Site
- RUBYGEMS PLATFORMS:
- ruby
- universal-darwin-19
- GEM PATHS:
- /Users/jing/.gem
- /Users/jing/.gem/ruby/2.6.0
- /Library/Ruby/Gems/2.6.0
- /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- https://rubygems.org/
- SHELL PATH:
- /usr/local/Cellar/rbenv/1.2.0/libexec
- /Users/jing/.rbenv/shims
- /Users/jing/.tiup/bin
- /Users/jing/opt/anaconda3/condabin
- /usr/local/sbin
- /Users/jing/code/github/zk-code/scripts
- /Users/jing/tools/apache-zookeeper-3.5.5-bin/bin
- /Users/jing/code/github/trace/sky/skywalking-cli/bin
- /Users/jing/tools/apache-skywalking-apm-bin-es7/bin
- /usr/local/opt/ruby/bin
- /Users/jing/tools/apache-maven-3.6.3/bin
- /Users/jing/.gem/bin
- /Users/jing/.cargo/bin
- /Users/jing/code/github/rtc/depot_tools
- /Users/jing/.gem/ruby/2.3.0/bin
- /usr/local/opt/coreutils/libexec/gnubin
- /Users/jing/tools/apache-skywalking-apm-bin-es7/bin
- /Users/jing/tools/confluent-6.1.0/bin
- /usr/local/opt/findutils/libexec/gnubin
- /usr/local/opt/gnu-sed/libexec/gnubin
- /Users/jing/tools/mongodb-osx-x86_64-4.0.2/bin
- /usr/local/opt/[email protected]/bin
- /Users/jing/tools/spark-2.2.0-bin-hadoop2.7/bin
- /Users/jing/bin
- /usr/local/bin
- /usr/local/bin
- /usr/bin
- /bin
- /usr/sbin
- /sbin
- /Library/TeX/texbin
- /Library/Apple/usr/bin
- /Applications/Wireshark.app/Contents/MacOS
- /Users/jing/go/bin
- /Users/jing/.pub-cache/bin
- /Applications/Visual Studio Code.app/Contents/Resources/app/bin
- /usr/local/opt/fzf/bin
$ gem install fluentd
Successfully installed fluentd-1.14.3
Parsing documentation for fluentd-1.14.3
Done installing documentation for fluentd after 3 seconds
1 gem installed
$ ls ~/.gem/gems -lrt | tail -n1
drwxr-xr-x 28 jing staff 896 Dec 7 10:33 fluentd-1.14.3
$ head -n1 ~/.gem/bin/fluentd
#!/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
然后我选择了带有 rbenv 的 Ruby 2.7.5 并再次安装了 Fluentd。
$ rbenv shell 2.7.5
$ gem env
RubyGems Environment:
- RUBYGEMS VERSION: 3.1.6
- RUBY VERSION: 2.7.5 (2021-11-24 patchlevel 203) [x86_64-darwin19]
- INSTALLATION DIRECTORY: /Users/jing/.gem
- USER INSTALLATION DIRECTORY: /Users/jing/.gem/ruby/2.7.0
- RUBY EXECUTABLE: /Users/jing/.rbenv/versions/2.7.5/bin/ruby
- GIT EXECUTABLE: /usr/bin/git
- EXECUTABLE DIRECTORY: /Users/jing/.gem/bin
- SPEC CACHE DIRECTORY: /Users/jing/.gem/specs
- SYSTEM CONFIGURATION DIRECTORY: /Users/jing/.rbenv/versions/2.7.5/etc
- RUBYGEMS PLATFORMS:
- ruby
- x86_64-darwin-19
- GEM PATHS:
- /Users/jing/.gem
- /Users/jing/.gem/ruby/2.7.0
- /Users/jing/.rbenv/versions/2.7.5/lib/ruby/gems/2.7.0
- GEM CONFIGURATION:
- :update_sources => true
- :verbose => true
- :backtrace => false
- :bulk_threshold => 1000
- REMOTE SOURCES:
- https://rubygems.org/
- SHELL PATH:
- /Users/jing/.rbenv/versions/2.7.5/bin
- /usr/local/Cellar/rbenv/1.2.0/libexec
- /Users/jing/.rbenv/shims
- /Users/jing/.tiup/bin
- /Users/jing/opt/anaconda3/condabin
- /usr/local/sbin
- /Users/jing/code/github/zk-code/scripts
- /Users/jing/tools/apache-zookeeper-3.5.5-bin/bin
- /Users/jing/code/github/trace/sky/skywalking-cli/bin
- /Users/jing/tools/apache-skywalking-apm-bin-es7/bin
- /usr/local/opt/ruby/bin
- /Users/jing/tools/apache-maven-3.6.3/bin
- /Users/jing/.gem/bin
- /Users/jing/.cargo/bin
- /Users/jing/code/github/rtc/depot_tools
- /Users/jing/.gem/ruby/2.3.0/bin
- /usr/local/opt/coreutils/libexec/gnubin
- /Users/jing/tools/apache-skywalking-apm-bin-es7/bin
- /Users/jing/tools/confluent-6.1.0/bin
- /usr/local/opt/findutils/libexec/gnubin
- /usr/local/opt/gnu-sed/libexec/gnubin
- /Users/jing/tools/mongodb-osx-x86_64-4.0.2/bin
- /usr/local/opt/[email protected]/bin
- /Users/jing/tools/spark-2.2.0-bin-hadoop2.7/bin
- /Users/jing/bin
- /usr/local/bin
- /usr/local/bin
- /usr/bin
- /bin
- /usr/sbin
- /sbin
- /Library/TeX/texbin
- /Library/Apple/usr/bin
- /Applications/Wireshark.app/Contents/MacOS
- /Users/jing/go/bin
- /Users/jing/.pub-cache/bin
- /Applications/Visual Studio Code.app/Contents/Resources/app/bin
- /usr/local/opt/fzf/binio Code.app/Contents/Resources/app/bin
- /usr/local/opt/fzf/bin
$ gem install fluentd
Successfully installed fluentd-1.14.3
Parsing documentation for fluentd-1.14.3
Done installing documentation for fluentd after 3 seconds
1 gem installed
$ ls ~/.gem/gems -lrt | tail -n1
drwxr-xr-x 28 jing staff 896 Dec 7 10:37 fluentd-1.14.3
$ head -n1 ~/.gem/bin/fluentd
#!/Users/jing/.rbenv/versions/2.7.5/bin/ruby
从上面的控制台会话中，我知道 Fluent 已重新安装在同一位置。
我不想让一个 Ruby 版本中的 gem 覆盖另一个 Ruby 版本中的 gem。有没有办法分别为一个 Ruby 版本保留一个 gem？
按照设计，你不能。该项目认为这是一个功能：
One thing well. rbenv is concerned solely with switching Ruby versions.但是，您可以使用插件来创建 Gemset，您可以根据每个应用程序进行切换。
我没有使用过它，但
rbenv-gemset安装后，您可以在项目的根目录中创建默认gemset：
$rbenv gemset init我亲自为此创建了这个 shell 函数：
function switch-ruby-gems() {
rm -rf "${GEM_HOME}"
gem install bundler
bundle install
}