/usr/bin/env ruby no such file or directory: Using capistrano 3, capistrano/rbenv, capistrano/bundler and capistrano/rails (using rails 4)

Question

I'm using capistrano, capistrano/rbenv, capistrano/bundler and capistrano/rails. I get this error in the step where capistrano compiles the assets:

DEBUG [49a50df6]    /usr/bin/env: DEBUG [49a50df6]    ruby DEBUG [49a50df6]    : No such file or directory DEBUG [49a50df6] 

In the production server /usr/bin/env ruby -v is correct. I'm aware of this: why-does-something-work-in-my-ssh-session-but-not-in-capistrano But I can't get it to work.

This is my Capfile:

# Load DSL and Setup Up Stages require 'capistrano/setup'  # Includes default deployment tasks require 'capistrano/deploy'  # Includes tasks from other gems included in your Gemfile # # For documentation on these, see for example: # #   https://github.com/capistrano/rvm #   https://github.com/capistrano/rbenv #   https://github.com/capistrano/chruby #   https://github.com/capistrano/bundler #   https://github.com/capistrano/rails/tree/master/assets #   https://github.com/capistrano/rails/tree/master/migrations # # require 'capistrano/rvm' require 'capistrano/rbenv' # require 'capistrano/chruby' require 'capistrano/bundler' require 'capistrano/rails/assets' require 'capistrano/rails/migrations'  # Loads custom tasks from `lib/capistrano/tasks' if you have any defined. Dir.glob('lib/capistrano/tasks/*.cap').each { |r| import r } 

This is my deploy.rb:

# rbenv set :rbenv_type, :user set :rbenv_ruby, '2.0.0-p247'  # bundler set :bundle_gemfile, -> { release_path.join('Gemfile') } set :bundle_dir, -> { shared_path.join('bundle') } set :bundle_flags, '--deployment --quiet' set :bundle_without, %w{development test}.join(' ') set :bundle_binstubs, -> { shared_path.join('bin') } set :bundle_roles, :all  # rails set :rails_env, 'production'  set :application, 'MY APP' set :repo_url, 'MY_REPO.git'  # ask :branch, proc { `git rev-parse --abbrev-ref HEAD`.chomp }  # set :deploy_to, '/var/www/my_app' # set :scm, :git  # set :format, :pretty # set :log_level, :debug # set :pty, true  set :linked_files, %w{.env config/database.yml} # set :linked_dirs, %w{bin log tmp/pids tmp/cache tmp/sockets vendor/bundle public/system}  # set :default_env, { path: "/opt/ruby/bin:$PATH" } set :keep_releases, 5  namespace :deploy do    desc 'Restart application'   task :restart do     on roles(:app), in: :sequence, wait: 5 do       # Your restart mechanism here, for example:       # execute :touch, release_path.join('tmp/restart.txt')     end   end    after :restart, :clear_cache do     on roles(:web), in: :groups, limit: 3, wait: 10 do       # Here we can do anything such as:       # within release_path do       #   execute :rake, 'cache:clear'       # end     end   end    after :finishing, 'deploy:cleanup'  end 

And this is my staging.rb:

set :stage, :staging  # Simple Role Syntax # ================== # Supports bulk-adding hosts to roles, the primary # server in each group is considered to be the first # unless any hosts have the primary property set. #role :app, %w{[email protected]} #role :web, %w{[email protected]} #role :db,  %w{[email protected]}  # Extended Server Syntax # ====================== # This can be used to drop a more detailed server # definition into the server list. The second argument # something that quacks like a has can be used to set # extended properties on the server. #server 'example.com', user: 'deploy', roles: %w{web app}, my_property: :my_value server 'my_server', user: 'my_user', roles: %w{web app db}  # you can set custom ssh options # it's possible to pass any option but you need to keep in mind that net/ssh understand limited list of options # you can see them in [net/ssh documentation](http://net-ssh.github.io/net-ssh/classes/Net/SSH.html#method-c-start) # set it globally #  set :ssh_options, { #    keys: %w(/home/rlisowski/.ssh/id_rsa), #    forward_agent: false, #    auth_methods: %w(password) #  } # and/or per server # server 'example.com', #   user: 'user_name', # roles: %w{web app}, #   ssh_options: { #     user: 'user_name', # overrides user setting above #     keys: %w(/home/user_name/.ssh/id_rsa), #     forward_agent: false, #     auth_methods: %w(publickey password) #     # password: 'please use keys' #   } # setting per server overrides global ssh_options  # fetch(:default_env).merge!(rails_env: :staging)  set :deploy_to, '/home/my_user' 

And this is the full trace:

 INFO [c24b8f94] Running RBENV_ROOT=~/.rbenv RBENV_VERSION=2.0.0-p247 ~/.rbenv/bin/rbenv exec bundle exec rake assets:precompile on 162.243.16.201 DEBUG [c24b8f94] Command: cd /home/my_app/releases/20131101193513 && ( RAILS_ENV=production RBENV_ROOT=~/.rbenv RBENV_VERSION=2.0.0-p247 ~/.rbenv/bin/rbenv exec bundle exec rake assets:precompile ) DEBUG [c24b8f94]    /usr/bin/env: DEBUG [c24b8f94]    ruby DEBUG [c24b8f94]    : No such file or directory DEBUG [c24b8f94] cap aborted! rake stdout: Nothing written rake stderr: Nothing written /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/command.rb:94:in `exit_status=' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:125:in `block (4 levels) in _execute' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:551:in `call' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:551:in `do_request' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:561:in `channel_request' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:465:in `dispatch_incoming_packets' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:221:in `preprocess' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:205:in `process' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `block in loop' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:269:in `wait' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:147:in `block (2 levels) in _execute' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:514:in `call' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/channel.rb:514:in `do_open_confirmation' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:545:in `channel_open_confirmation' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:465:in `dispatch_incoming_packets' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:221:in `preprocess' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:205:in `process' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `block in loop' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/net-ssh-2.7.0/lib/net/ssh/connection/session.rb:169:in `loop' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:149:in `block in _execute' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:106:in `tap' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:106:in `_execute' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:54:in `execute' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/capistrano-rails-1.0.0/lib/capistrano/tasks/assets.rake:61:in `block (6 levels) in <top (required)>' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/abstract.rb:89:in `with' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/capistrano-rails-1.0.0/lib/capistrano/tasks/assets.rake:60:in `block (5 levels) in <top (required)>' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/abstract.rb:81:in `within' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/capistrano-rails-1.0.0/lib/capistrano/tasks/assets.rake:59:in `block (4 levels) in <top (required)>' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:42:in `instance_exec' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/backends/netssh.rb:42:in `run' /Users/patricio/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/sshkit-1.1.0/lib/sshkit/runners/parallel.rb:12:in `block (2 levels) in execute' Tasks: TOP => deploy:assets:precompile 

By the way, I think it's not related to $PATH, because bundle install runs just fine.

Does anyone know what's going on?

Thank you!

Answer 1

Okay, as I had the same issue and it took me quite a while to resolve it:

You are probably wondering why this command is not working while it IS working when you log into with you shell using ssh.

I am not an expert (so correct me when I am wrong): The thing is there are several differences in logging in on a remote server using ssh. To quote the documentation of capistrano:

It's really a question of which kind of shell Capistrano is using, it's a matrix of possibilities concerning login, non-login, interactive, or non-interactive.

They have a fancy graphic here (at the bottom) where they illustrate the path of files that are executed in login process. - the given source is also interesting if you want to continue reading on this topic.

What is going wrong?

When YOU log in using ssh you are (on login) executing several files (for example .bash_profile when you using the bash). Commonly your $PATH variable is extended with several paths to important functions in your envirement. BUT different login "styles" include different files.

As the documentation says again:

By default Capistrano always assigns a non-login, non-interactive shell.

In my case this lead to a case where my login file .bash_profile is not included BUT it included the settings for my rvm. The result that the capistrano login session didnt know about my rvm path.

How can I fix this?

For me it turned out to just be the uncommenting of the require 'capistrano/rvm' (As I am using RVM) line in the Capfile (located in the root of your rails-project.

Hope to help someone.

EDIT:

And for sure include gem 'capistrano-rvm' in the Gemfile!