Run a rake task upon saving a file

Question

I have a few files in a project that require post-processing each time they are updated.

I can extract these processes into a rake task. My question is:

How can a rake task be run automatically every time a specific file is saved?

why rake task, use some after_save callbacks with the processing you want to perform — Bijendra, Sep 19 '16 at 04:28
@Bijendra I need to run some terminal commands. I assume those aren't possible with `after_save`. — sscirrus, Sep 19 '16 at 04:54
What if you invoke the task like `Rake::Task['task_name'].invoke` on save — Tony Vincent, Sep 19 '16 at 05:06
@TonyVincent I don't know what the invoke statement means. How do you implement it? — sscirrus, Sep 19 '16 at 05:13

score 0 · Answer 1 · edited May 23 '17 at 10:34

0

I think you will be able to do this using invoke method

if @file.save
  .
  .
  .
  Rake::Task['task_name'].invoke
end

see this SO question for more info

edited May 23 '17 at 10:34

Community

answered Sep 19 '16 at 05:18

Tony Vincent

score 0 · Answer 2 · answered Sep 19 '16 at 07:55

0

You can do this in your model file.

  after_save :update_rake_operations

  def update_rake_operations
    task = "update_status"
    Rake::Task[task].invoke
  end

You should have the below code in Rakefile under project folder. This should be present by default.

  require File.expand_path('../config/application', __FILE__)
  require 'rake'

  ProjectFolder::Application.load_tasks

answered Sep 19 '16 at 07:55

Bijendra

This applies to saving a record in the database, not a file. – sscirrus Sep 24 '16 at 20:51

2 Answers2