remote_rake_task.rake

# lib/capistrano/tasks/remote_rake_task.rake
#
# This task allows you to run rake tasks on the remote server using Capistrano.
# The rake task itself is passed in as an argument.
# Example:
# bin/cap staging "task:invoke[app:setup]"
#
# References:
# http://www.jetthoughts.com/blog/magic/2013/09/26/capistrano-3-passing-parameters-to-your-task.html
# http://stackoverflow.com/questions/23828950/how-to-run-custom-rake-task-via-capistrano-3

namespace :task do
  desc 'Execute a specific rake task'
  task :invoke, :command do |task, args|
    on roles(:app) do
      within release_path do
        with rails_env: fetch(:rails_env) do
          execute :rake, args[:command]
        end
      end
    end
  end
end