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@IanVaughan
Created June 9, 2012 20:37
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Uninstall all rbenv gems
#!/usr/bin/env bash
uninstall() {
list=`gem list --no-versions`
for gem in $list; do
gem uninstall $gem -aIx
done
gem list
gem install bundler
}
#rbenv versions --bare
RBENVPATH=`rbenv root`
echo $RBENVPATH
RUBIES=`ls $RBENVPATH/versions`
for ruby in $RUBIES; do
echo '---------------------------------------'
echo $ruby
rbenv local $ruby
uninstall
done
@wellington1993
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Legal! Cool!

@ThinkTankShark
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Amazing script. Thanks!

@denislins
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+99

@antnruban
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Works great!! Thanks a lot!

@agrimm
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agrimm commented Feb 8, 2017

This is a great script. However, there's a minor hiccup: I got

ERROR:  While executing gem ... (Gem::InstallError)
    gem "bigdecimal" cannot be uninstalled because it is a default gem

Is there a fork that addresses this?

@lacostenycoder
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Nice one! I just wanted to remove one gem prefix for all ruby versions and was easy with this.
Just modified

list=`gem list --no-versions`

to

list=`gem list my_stupid_gem_prefix --no-versions`

Works great, thanks!

@b264
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b264 commented Jun 20, 2017

this== greatness

@florestankorp
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Wow, thanks for this script!

@konstantin0s
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I am new to Ubuntu and I want to know how do you run this script. Any suggestions?

@ymsrk
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ymsrk commented Jan 14, 2018

Works Thanks! Nice Script!

@marioabreu
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cool 👍

@charlesdebarros
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You are a life-saver. Thank you.
:)

@charlesdebarros
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charlesdebarros commented Oct 22, 2018

I am new to Ubuntu and I want to know how do you run this script. Any suggestions?
@konstantin0s
I am sure you may have found the solution by now but just in case, check this:
https://askubuntu.com/questions/38661/how-do-i-run-sh-files

@jcunanan05
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Thank you!

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ghost commented Feb 4, 2019

Thanks. Saved us the trouble

@mrvincenzo
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Thanks!

@coorasse
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I elaborated a version to cleanup only old versions of the gems:

#!/bin/sh
RBENVPATH=`rbenv root`
echo $RBENVPATH
RUBIES=`ls $RBENVPATH/versions`
for ruby in $RUBIES; do
  echo '---------------------------------------'
  echo $ruby
  rbenv local $ruby
  gem cleanup
done

@hdchinh
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hdchinh commented Jun 22, 2021

I elaborated a version to cleanup only old versions of the gems:

#!/bin/sh
RBENVPATH=`rbenv root`
echo $RBENVPATH
RUBIES=`ls $RBENVPATH/versions`
for ruby in $RUBIES; do
  echo '---------------------------------------'
  echo $ruby
  rbenv local $ruby
  gem cleanup
done

nice script, thank you

@Riveascore
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Riveascore commented May 4, 2024

Updated solution needed, because of the following header:

*** LOCAL GEMS ***

*** LOCAL GEMS ***

aasm (5.3.0)
abbrev (default: 0.1.1)
ace-rails-ap (4.3)
etc...

Fix:

--no-verbose is what removes the header.
(We may need another fix in the future if things change again)

#!/bin/bash

gem_remove() {
  gem list --no-versions --no-verbose | xargs gem uninstall -aIx
  gem list
}

gem_remove_all() {
  #rbenv versions --bare
  RBENVPATH=`rbenv root`
  echo $RBENVPATH
  RUBIES=`ls $RBENVPATH/versions`
  for ruby in $RUBIES; do
    echo '---------------------------------------'
    echo $ruby
    rbenv local $ruby
    gem_remove
  done
}

I don't include gem install bundler at the end.
Many times in Rails, Gemfile.lock will include a specific bundler version, so I prefer to just install that version manually.

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