Invoke Any Rake Task via Capistrano

Just run a rake task without having to setup a special capistrano task.

Usage

cap rake_task:invoke COMMAND="db:migrate" #yes, its a silly example...

Setup

namespace :rake_task do
  task :invoke do
    if ENV['COMMAND'].to_s.strip == ''
      puts "USAGE:   cap rake:invoke COMMAND='db:migrate'"
    else
      run "cd #{current_path} && RAILS_ENV=production sudo rake #{ENV['COMMAND']}"
    end
  end
end

4 thoughts on “Invoke Any Rake Task via Capistrano”

Evan R. Murphy says:

2013-03-20 at 21:31:22

Handy! I got a cryptic “Syntax error: end of file unexpected” error on deployment, which I traced to calling the namespace `rake` (clashes with the capistrano command `rake`). Changing the namespace to ‘rake_task’ fixed this. I also modified your example to say `RAILS_ENV=#{rails_env}` instead of `RAILS_ENV=production` so that it will work on my staging server as well.

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Evan R. Murphy says:

2013-03-20 at 21:31:52

Handy! I got a cryptic “Syntax error: end of file unexpected” error on deployment, which I traced to calling the namespace `rake` (clashes with the capistrano command `rake`). Changing the namespace to ‘rake_task’ fixed this. I also modified your example to say `RAILS_ENV=#{rails_env}` instead of `RAILS_ENV=production` so that it will work on my staging server as well.

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pragmatig says:

2013-03-20 at 21:33:26

Thanks, updated it 🙂

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Nils Jonsson says:

2013-11-20 at 22:12:14

Let me recommend the Cape gem for this purpose. It makes it possible to invoke any Rake task (including ones using arguments and environment variables) with a single line of configuration in your ‘config/deploy.rb’. Organizing Rake tasks (renaming, namespacing, filtering) is a snap with a straightforward DSL.

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