chef

https://github.com/opscode/chef

Ruby

A systems integration framework, built to bring the benefits of configuration management to your entire infrastructure.

Chef::Resource#notifies

Sets up a notification that will run a particular action on another resource
if and when *this* resource is updated by an action.

If the action does not update this resource, the notification never triggers.

Only one resource may be specified per notification.

`delayed` notifications will only *ever* happen once per resource, so if
multiple resources all notify a single resource to perform the same action,
the action will only happen once.  However, if they ask for different
actions, each action will happen once, in the order they were updated.

`immediate` notifications will cause the action to be triggered once per
notification, regardless of how many other resources have triggered the
notification as well.

Source | Google | Stack overflow

Edit

git clone [email protected]:opscode/chef.git
cd chef
open lib/chef/resource.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Chef--Resource-notifies-for-pr

# Commit to git

git add lib/chef/resource.rbgit commit -m "better docs for Chef::Resource#notifies"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Chef--Resource-notifies-for-pr

hub pull-request

# Celebrate!