Unable to get linecache19 on deployment server due to ruby patch versions being different on development and deployment server

Question

After following instructions on this stackoverflow I was able to get it working on local machine. I even installed the gems on the deployment server and can run the server there locally.

Rails with ruby-debugger throw 'Symbol not found: _ruby_current_thread (LoadError)'

For deploying we are using Capistrano and the issue is that the Gemfile contains the following:

gem 'linecache19', '0.5.13', :path => "~/.rvm/gems/ruby-1.9.3-p#{RUBY_PATCHLEVEL}/gems/linecache19-0.5.13/"
gem 'ruby-debug-base19', '0.11.26', :path => "~/.rvm/gems/ruby-1.9.3-p#{RUBY_PATCHLEVEL}/gems/ruby-debug-base19-0.11.26/"

Because RUBY_PATCHLEVEL is different on server and my local machine it adds my local machines path to the Gemfile.lock and on the server it tries to find the gem there but it cant because the patch is different.

Below is the stack trace

You are trying to install in deployment mode after changing your Gemfile. Run bundle install elsewhere and add the updated Gemfile.lock to version control.

You have added to the Gemfile:
* source: source at ~/.rvm/gems/ruby-1.9.3-p125/gems/ruby-debug-base19-0.11.26/
* source: source at ~/.rvm/gems/ruby-1.9.3-p125/gems/linecache19-0.5.13/

My local machine ruby version is 1.9.3-p194 and server has 1.9.3-p125. How can I fix this?

Answer 1

Use '.rvmrc file to specify that the project should use the same RUBY_PATCHLEVEL on both the dev & the prod server.

Create a file named .rvmrc in the main folder of the application with the following line:

rvm use 1.9.3-p125

That would make the project use the specified patch version.

Of course, that means that you have to install 1.9.3-p125 version locally; rvm is exactly for that purpose - to manage multiple versions of ruby on the local machine.

I usually have project specific gemsets as well, and my .rvmrc file looks as follows:

rvm_gemset_create_on_use_flag=1
rvm use <ruby version>@<gemset name ; usually the project name>

Example

rvm_gemset_create_on_use_flag=1
rvm use 1.9.3@myblog