What is the best way to uninstall gems from a rails3 project

Question

I installed all of my gems using bundler via the Gemfile  I thought  mistakenly  that if I deleted a gem from my Gemfile and ran  bundle install  that the deleted gems would be uninstalled  I ve looked at the bundler help file and  so far as I can tell  it does not have a way to uninstall gems    Do I just use gem uninstall x for everything  Is this going to confuse bundler

User · Answer

You must use  gem uninstall gem name  to uninstall a gem   Note that if you installed the gem system-wide  ie  sudo bundle install  then you may need to specify the binary directory using the -n option  to ensure binaries belonging to the gem are removed  For example  sudo gem uninstall gem name  -n  usr lib ruby gems 1 9 1 bin

User · Answer

I seemed to solve this by manually removing the unicorn gem via bundler   sudo bundler exec gem uninstall unicorn    then rebundling   sudo bundle install     Not sure why it happened though  although the above fix does seem to work

User · Answer

With newer versions of bundler you can use the clean task     bundle help clean Usage      bundle clean  Options       --dry-run only print out changes  do not actually clean gems       --force forces clean even if --path is not set       --no-color Disable colorization in output      -V   --verbose Enable verbose output mode   Cleans up unused gems in your bundler directory   bundle clean --dry-run --force Would have removed actionmailer  3 1 12  Would have removed actionmailer  3 2 0 rc2  Would have removed actionpack  3 1 12  Would have removed actionpack  3 2 0 rc2  Would have removed activemodel  3 1 12        edit   This is not recommended if you re using a global gemset  i e  - all of your projects keep their gems in the same place   There re few ways to keep each project s gems separate  though    rvm gemsets  http   rvm io gemsets basics  bundle install with any of the following options  --deployment or --path  lt path gt   http   bundler io v1 3 man bundle-install 1 html

User · Answer

This will uninstall a gem installed by bundler       bundle exec gem uninstall GEM NAME   Note that this throws     ERROR  While executing gem      NoMethodError  undefined method  delete  for   lt Bundler  SpecSet 0x00000101142268    but the gem is actually removed  Next time you run bundle install the gem will be reinstalled

User · Answer

Bundler is launched from your app s root directory so it makes sure all needed gems are present to get your app working If for some reason you no longer need a gem you ll have to run the       gem uninstall gem name    as you stated above So every time you run bundler it ll recheck dependencies  EDIT - 24 12 2014  I see that people keep coming to this question I decided to add a little something  The answer I gave was for the case when you maintain your gems global  Consider using a gem manager such as rbenv or rvm to keep sets of gems scoped to specific projects   This means that no gems will be installed at a global level and therefore when you remove one from your project s Gemfile and rerun bundle then it  obviously  won t be loaded in your project  Then  you can run bundle clean  with the project dir  and it will remove from the system all those gems that were once installed from your Gemfile  in the same dir  but at this given time are no longer listed there     long story short -  it removes unused gems

User · Answer

Bundler now has a bundle remove GEM NAME command  since v1 17 0  25 October 2018

User · Answer

If you want to clean up all your gems and start over  sudo gem clean

[ruby-on-rails-3] What is the best way to uninstall gems from a rails3 project?

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