Capistrano Slackify

Publish deploy notifications to Slack - for Capistrano v3.

Installation

Add this line to your application's Gemfile:

gem 'capistrano-slackify', require: false

And then execute:

$ bundle

Or install it yourself as:

$ gem install capistrano-slackify

Usage

Require the gem in your Capfile:

require 'capistrano/slackify'

And then set the required variables in config/deploy.rb:

set :slack_url, 'https://hooks.slack.com/services/your/webhook/url'

Ensure that you have enabled the incoming webhooks integration - copy/paste the webhook url provided in the setup instructions.

The task will run automatically on deploy. Alternatively, you can notify of a deploy starting manually by using:

bundle exec cap production slack:notify_started

Or to notify of a finished deploy:

bundle exec cap production slack:notify_finished

By default, this will publish something along the lines of:

Revision 64a3c1de of my_app deployed to production by seenmyfate in 333 seconds.

If a deploy has failed, the following message will be published by default:

production deploy of my_app with revision/branch 64a3c1de failed

As with the other tasks, it is also possible to notify failures manually:

bundle exec cap production slack:notify_failed

Customisation

Any of the defaults can be over-ridden in config/deploy.rb:

set :slack_channel, '#devops'
set :slack_username, 'Deploybot'
set :slack_emoji, ':trollface:'
set :slack_user, ENV['GIT_AUTHOR_NAME']
set :slack_text, -> {
  elapsed = Integer(fetch(:time_finished) - fetch(:time_started))
  "Revision #{fetch(:current_revision, fetch(:branch))} of " \
  "#{fetch(:application)} deployed to #{fetch(:stage)} by #{fetch(:slack_user)} " \
  "in #{elapsed} seconds."
}
set :slack_deploy_starting_text, -> {
  "#{fetch(:stage)} deploy starting with revision/branch #{fetch(:current_revision, fetch(:branch))} for #{fetch(:application)}"
}
set :slack_deploy_failed_text, -> {
  "#{fetch(:stage)} deploy of #{fetch(:application)} with revision/branch #{fetch(:current_revision, fetch(:branch))} failed"
}

To configure the way slack parses your message (see 'Parsing Modes' at https://api.slack.com/docs/formatting) use the :slack_parse setting:

set :slack_parse, 'none' # available options: 'default', 'none', 'full'

Copyright

Copyright (c) 2014 OnTheBeach Ltd. See LICENSE.txt for further details.