1 minute read

Ruby

OMG Ruby !!

What a painful experience!! Installed different versions of ruby, MacOS versions, versions from homebrew, then, on top of that installed gems left, right and center. Oh, not forgetting random sprinkling of sudo just to get things running so i can do my day job! and not really understanding the consequences! Then, one day I receive an OS update, work collegue delivers a new tool, dependent on new versions of gems / ruby. I think you can guess! stuff just stopped working…

Cleanup

Attempting to cleanup,

  • Which version of ruby is my shell picking up?
  • Which gem version is in my path, is it compatible with the version of ruby?
  • Where are the gem pkg files being installed?
  • Why can’t I uninstall gems ?
  • Commands still found in my path after I (thought) I had uninstalled !?

Find whats in your path, find all versions of ruby, gem executeables and start uninstalling.

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$ echo ${PATH}   ............. check howmany references to ruby installs
$ which -a ruby  -.-.-.-.-.-.- location of each ruby installed.
$ which -a gem
$ gem env home   ............. find where "gem" is installing gem files.
$ gem uninstall gem_name
$ brew info ruby ............. find versions of ruby installed via homebrew.

Each version of ruby/gem will have files installed in specific locations, target each one in turn and uninstall/cleanup;

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$ /usr/local/opt/ruby/bin/ruby --version
3.0.2
$ /usr/local/opt/ruby/bin/gem --version
3.2.22
$ /usr/local/opt/ruby/bin/gem env home
/usr/local/lib/ruby/gems/3.0.0
$ /usr/local/opt/ruby/bin/gem uninstall jekyll
$ ls -l /usr/local/lib/ruby/gems/3.0.0/gems/          <---- gem removed from this location.
$ brew uninstall ruby

rbenv

See

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$ rbenv
rbenv 1.1.2
Usage: rbenv <command> [<args>]

Some useful rbenv commands are:
   commands    List all available rbenv commands
   local       Set or show the local application-specific Ruby version
   global      Set or show the global Ruby version
   shell       Set or show the shell-specific Ruby version
   install     Install a Ruby version using ruby-build
   uninstall   Uninstall a specific Ruby version
   rehash      Rehash rbenv shims (run this after installing executables)
   version     Show the current Ruby version and its origin
   versions    List installed Ruby versions
   which       Display the full path to an executable
   whence      List all Ruby versions that contain the given executable

See `rbenv help <command>' for information on a specific command.
For full documentation, see: https://github.com/rbenv/rbenv#readme

$ rbenv local
rbenv: no local version configured for this directory
$ rbenv global
2.6.8