Call rake task on routes.rb update?

Question

Using rails 4.2.1.

I want to call a rake task on every config/routes.rb file save. How would I go about doing this?

Note: the rake task does require the rails environment. i.e. it's of the task :task_name => :environment do #... nature.

@AndreyDeineko Not solved yet. I always thought that `rails` itself detects a change to the `routes.rb` file and runs something like `Rails.application.reload_routes!`. I want to find the function that calls `reload_routes!` and extend it to also run my `rake` task. No luck yet. — Derek, May 13 '15 at 16:16

score 1 · Answer 1 · answered May 13 '15 at 07:14

Take a look into filewatcher gem.

You can define actions to be taken depending on what changes are made to specified file (or directory):

require 'filewatcher'

FileWatcher.new("config/routes.rb").watch() do |filename, event|
  if(event == :changed)
    your_rake_task
  end
  if(event == :delete)
    # ...
  end
  if(event == :new)
    # ...
  end
end

score 1 · Answer 2 · edited May 23 '17 at 11:43

In rails 4.2.1

# development.rb
require 'rake'
Rails.application.configure do
#...
  Rails.application.load_tasks
  # code executes on routes change
  ActionDispatch::Reloader.to_prepare do
    Rails.application.reload_routes!

    if JsRoutes.assert_usable_configuration!
      Rake::Task['js_routes:generate'].reenable
      Rake::Task['js_routes:generate'].invoke
    end
  end
#...
end

Based off of https://stackoverflow.com/a/27046271/749477

Call rake task on routes.rb update?

2 Answers2