Fix Capistrano with RubyGems 1.6
After updating your RubyGems, you will probably not be able to run Capistrano any more, but receive an error similar to this:
can’t activate net-ssh (= 2.0.22) for , already activated net-ssh-2.1.0 for  (Gem::LoadError)
If you have Bundler installed, you can use
bundle exec to avoid this problem as follows:
Create a gemfile at
~/.capistrano/Gemfile (or at some other sensible place), that only contains these 2 lines:
gem ‘capistrano-ext’ # You need this for multistage deployments
gem ‘hoptoad_notifier’ # Add this for projects that use Hoptoad and Capistrano integration
bundle install in the same directory.
Now you can use Capistrano again by prepending
BUNDLE_GEMFILE=~/.capistrano/Gemfile bundle exec, i.e.
BUNDLE_GEMFILE=~/.capistrano/Gemfile bundle exec cap deploy
I suggest making a shell alias. For the Bash, append this to your ~/.bashrc:
alias cap=’BUNDLE_GEMFILE=~/.capistrano/Gemfile bundle exec cap’
Now you can once again simply run
Author of this card:
- netssh, ruby, deployment, conflict
- About this deck:
- We are makandra and do test-driven, agile Ruby on Rails software development.
- License for source code
License for source code
All source code included in the card Fix Capistrano with RubyGems 1.6 is licensed under the license stated below. This includes both code snippets embedded in the card text and code that is included as a file attachment. Excepted from this license are code snippets that are explicitely marked as citations from another source.
The MIT License (MIT) Copyright (c) 2011-2012 makandra GmbH 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.