bundler 版本声称存在，但不存在

Question

如何解释和补救？

-bash> gem list bundler

*** LOCAL GEMS ***

bundler (default: 2.2.21)

-bash> bundler --version
Bundler version 2.1.4

-bash> gem uninstall bundler:2.1.4
Gem 'bundler' is not installed

-bash> gem environment | grep INSTALL
  - INSTALLATION DIRECTORY: /Users/me/.rbenv/versions/2.7.4/lib/ruby/gems/2.7.0
  - USER INSTALLATION DIRECTORY: /Users/me/.gem/ruby/2.7.0

-bash> find /Users/me/.rbenv/versions/2.7.4/ -name "bundler*"                   
/Users/me/.rbenv/versions/2.7.4//bin/bundler                                    
/Users/me/.rbenv/versions/2.7.4//lib/ruby/2.7.0/rubygems/bundler_version_finder.rb
/Users/me/.rbenv/versions/2.7.4//lib/ruby/2.7.0/exe/bundler                     
/Users/me/.rbenv/versions/2.7.4//lib/ruby/2.7.0/bundler.rb                      
/Users/me/.rbenv/versions/2.7.4//lib/ruby/2.7.0/bundler                         
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/specifications/default/bundler-2.2.21.gemspec
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/cache/bundler              
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/cache/bundler-2.2.21.gem   
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/doc/bundler-2.2.21         
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/doc/bundler-2.2.27         
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/bootsnap-1.8.1/lib/bootsnap/bundler.rb
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/bundler-2.2.21        
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/bundler-2.2.21/exe/bundler
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/rubocop-1.13.0/lib/rubocop/cop/bundler
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/bootsnap-1.7.4/lib/bootsnap/bundler.rb
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/rubocop-1.21.0/lib/rubocop/cop/bundler
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/gems/simplecov-0.17.1/lib/simplecov/profiles/bundler_filter.rb
/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/bundler                    
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/LockfileParser/bundler_version-i.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/bundler_major_version-c.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/Standalone/bundler_path-i.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/Plugin/API/Source/bundler_plugin_api_source%3f-i.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/Fetcher/bundler_cert_store-i.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/CLI/Gem/bundler_dependency_version-i.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Bundler/SharedHelpers/bundler_ruby_lib-i.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Gem/BundlerVersionFinder/bundler_version_with_reason-c.ri
/Users/me/.rbenv/versions/2.7.4//share/ri/2.7.0/system/Gem/BundlerVersionFinder/bundler_version-c.ri

Answer 1

我无法解释，但补救措施是：

1. 从呈现default的文件夹中删除bundler-2.2.21.gemspec：
2. 重新安装所需的版本。

---

卸载bundler 将不起作用：

-bash> gem uninstall bundler
Gem bundler-2.2.21 cannot be uninstalled because it is a default gem

注意上面find 命令输出中的以下行：

/Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/specifications/default/bundler-2.2.21.gemspec

移除它以移除此 gem 的“默认”状态：

rm /Users/me/.rbenv/versions/2.7.4//lib/ruby/gems/2.7.0/specifications/default/bundler-2.2.21.gemspec

现在无法卸载...

-bash> gem uninstall bundler
Gem 'bundler' is not installed

确实……

-bash> bundler --version
Traceback (most recent call last):
        2: from /Users/me/.rbenv/versions/2.7.4/bin/bundler:23:in `<main>'
        1: from /Users/me/.rbenv/versions/2.7.4/lib/ruby/2.7.0/rubygems.rb:296:in `activate_bin_path'
/Users/me/.rbenv/versions/2.7.4/lib/ruby/2.7.0/rubygems.rb:277:in `find_spec_for_exe': Could not find 'bundler' (2.1.4) required by your /Users/me/Projects/kinside/kinside/Gemfile.lock. (Gem::GemNotFoundException)
To update to the latest version installed on your system, run `bundle update --bundler`.
To install the missing version, run `gem install bundler:2.1.4`

所以安装想要的版本：

-bash> gem install bundler:2.2.21
Successfully installed bundler-2.2.21
Parsing documentation for bundler-2.2.21
Installing ri documentation for bundler-2.2.21
Done installing documentation for bundler after 3 seconds
1 gem installed

检查：

-bash> bundler --version
Bundler version 2.2.21

-bash> gem list bundler

*** LOCAL GEMS ***

bundler (2.2.21)