You have already activated X, but your Gemfile requires Y
RubyRubygemsBundlerRuby Problem Overview
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 exec.
Using bundle exec rake
instead of just rake
seems to work, but is it the best way to fix this?
Ruby Solutions
Solution 1 - Ruby
Try bundle clean --force
It removes every system gem not in this bundle
Solution 2 - Ruby
Using bundle exec
is the right way to do this.
Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake
you had matched the version in your Gemfile, so you didn't get any warning when simply using rake
.
Yehuda Katz (one of the original Bundler developers) explains it all in this blog post.
To avoid typing bundle exec ...
all the time, you could set up an alias or function in your shell for commands you commonly use with Bundler. For example this is what I use for Rake:
$ type bake
bake is a function
bake ()
{
bundle exec rake "$@"
}
Solution 3 - Ruby
If you have a reason to keep the current version of rake (or whatever other gem is causing the problem), matt is correct, the best way to do this is to run bundle exec
. This uses the version specified in your Gemfile instead of using the newest version of the gem you have installed. (nathan.f77 has a good solution below if you don't want to type bundle exec
every time you run rake)
Otherwise, if there is no reason not to update rake, you can run
bundle update rake
This will actually update your Gemfile.lock to use the newest version of rake instead of having to run bundle exec
every time.
Note: if you run just bundle update
this will update all the gems in your Gemfile instead of just rake, which probably isn't what you want, because if something breaks in your application you won't know which gem update caused it.
The less recommended way to keep the older version without having to use bundle exec
is to uninstall the newer versions of rake.
$ gem uninstall rakeSelect gem to uninstall:
- rake-0.8.7
- rake-0.9.2
- All versions > 2 Successfully uninstalled rake-0.9.2
This works, but if you are working with multiple apps that use different versions of rake, this can be a pain because you will find yourself constantly having to install and uninstall different versions.
Solution 4 - Ruby
Last time that this happened to me, I had updated all my gems. I did a gem uninstall rake
and it listed version options. I picked the newer one, and then I did not have to use bundle exec
anymore.
Basically, if you use bundle exec
it uses whatever gem version is in installed by your bundle, so what is in the Gemfile. Without bundle exec
it uses whatever version is your system default.
Solution 5 - Ruby
Ooh! The Katz article is excellent!
I like this solution the best:
bundle install --binstubs
so that you can now type
bin/rake .stuff.
For someone like myself who is developing both 2.3 and 3.0.9 apps, this makes me feel a lot better.
Solution 6 - Ruby
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; }
Solution 7 - Ruby
Just used: bundle update
In my case, it solved my dependency version problem with Gemfile.lock file, it updated the packages with the latest version.
Solution 8 - Ruby
Another way to not type it every time is with a Makefile, for example
rake :
bundle exec rake
Solution 9 - Ruby
You might as well want to delete the Gemfile.lock file and run
bundle install
or just bundle
, then try again.