Bundler + RVM + Passenger + Capistrano deployment & missing gems

Question

I got the server with the configuration above.

This is the important part of my deploy.rb recipe:

$:.unshift(File.expand_path('./lib', ENV['rvm_path']))
require 'rvm/capistrano'
require 'bundler/capistrano'

set :rvm_ruby_string, 'ruby-1.9.2-p290'
set :rvm_type, :system
set :bundle_flags, "--deployment"

set :default_environment, {
  'PATH' => ENV['PATH'],
  'RAILS_ENV' => ENV['RAILS_ENV']
}

set :stages, %w(staging production)
require 'capistrano/ext/multistage'

Running cap staging deploy as is, leads to an error:

* executing "cd /mnt/data-store/project/releases/shared &&
bundle install --gemfile /mnt/data-store/project/releases/shared/Gemfile
--path /mnt/data-store/project/shared/bundle --deployment --without development test"

** [out :: localhost] The --deployment flag requires a Gemfile.lock.
Please make sure you have checked your Gemfile.lock into version control
before deploying.

... rolling back ...

failed: "env PATH=... RAILS_ENV=staging rvm_path=/usr/local/rvm /usr/local/rvm/bin/rvm-shell 'ruby-1.9.2-p290' -c 'cd /mnt/data-store/project/releases/shared && bundle install --gemfile /mnt/data-store/project/releases/shared/Gemfile --path /mnt/data-store/project/shared/bundle --deployment --without development test'" on localhost

Gemfile and Gemfile.lock are in the source control. I ran bundle install locally first to generate the .lock file. But the bundler/capistrano points to /mnt/data-store/project/releases/shared/Gemfile so I just copied manually both files there. I'm sure I'm doing it wrong here. I guess it should be copied automatically.

Executed deploy again (1) and it didn't fail on the bundle install, it even had

Your bundle is complete! It was installed into /mnt/data-store/project/shared/bundle in the output.

BUT, one of my cap tasks executes a rake. The result of this is: *Could not find bcrypt-ruby-3.0.1 in any of the sources *Try running bundle install.

Proceeding with my adventure, I discovered that once you have .bundle/config with BUNDLE_PATH: /mnt/data-store/project/shared/bundle It works. I had this directory, probably created by bundler, under /mnt/data-store/releases/shared/, so I copied manually to the rails root.

Now, rake/rails c work.

bundle show twitter shows .../shared/bundle/ruby/1.9.1/gems/twitter-1.7.1.

BUT, redeploying brings me back to (1), because the .bundle dir isn't there.

Concrete questions:

1. Do I need to create/copy .bundle/config manually?
2. Do I need to copy Gemfile/Gemfile.lock manually to the shared dir? What happens if I add gems? Should I hold two copies, or manually/programmatically sync them?
3. WHAT AM I DOING WRONG?

Thanks!

Answer 1

Look at this part in the deployment.rb file (Bundler code)

args = ["--gemfile #{File.join(context.fetch(:current_release), bundle_gemfile)}"]
args << "--path #{bundle_dir}" unless bundle_dir.to_s.empty?

There's a key called :current_release, this key is probably not being set correctly with Capistrano for some reason.

the :current_release in bundler will point to the "shared" folder instead of the latest release (with the timestamp)

This is getting executed on before 'deploy:finalize_update'.

What I would do in order to fix this is to add your own hook on this event.

before 'deploy:finalize_update', 'x:set_current_release'

And this is the actual method

task :set_current_release, :roles => :app do
    set :current_release, latest_release
end