You have already activated X, but your Gemfile requires Y

Question

When running rake I get this error:

You have already activated rake 0.9.2, but your Gemfile requires rake 0.8.7. Consider using bundle ex

Answer 1

bundle exec is correct, but you don't want to be typing it every time.

You can put this in your .bashrc:

# Automatically invoke bundler for rake, if necessary.
rake() { if [ -e ./Gemfile.lock ]; then bundle exec rake "$@"; else /usr/bin/env rake "$@"; fi; }