Uninstall all non-default Ruby gems

gem_reset.sh

#!/usr/bin/env sh

set -uoe pipefail

gem_names=$(gem list --no-versions | grep -E --regexp='^\w')
for _gem in $gem_names ; do
  # --all: uninstall all versions
  # --executables: remove bin files
  # --ignore-dependencies: don't worry that uninstalling the gem will break the dependency graph
  # --user-install: remove from both $HOME and $GEM_HOME
  gem uninstall "$_gem" --all --executables --ignore-dependencies --user-install
done

LICENSE

Copyright (c) 2017 Jordan Cole

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Here's the code reformatted as a one-liner so it's easy to copy and paste:

for _gem in $(gem list --no-versions | grep -E --regexp='^\w') ; do gem uninstall "$_gem" --all --executables --ignore-dependencies --user-install ; done