Capistrano Slack

Install

Best way to install Capistrano Slack intergration is via Bundler.

Add the following to your Gemfile, then run the bundle command to install the gem direct from the git repository

gem 'capistrano-slack', :git => 'https://github.com/j-mcnally/capistrano-slack.git'

Once installed you can use the settings below in your Capistrano deploy.rb to configure Slack.

Push deployment messages to Slack

#in deploy/shared.rb add
require 'capistrano/slack'

#in deploy.rb 
# required
set :slack_token, "webhook_token" # comes from inbound webhook integration
set :slack_room, "#general"
set :slack_subdomain, "kohactive" # if your subdomain is kohactive.slack.com


before 'deploy', 'slack:starting'
after 'deploy',  'slack:finished'


# optional
set :slack_application, "Rocketman"
set :slack_username, "Elton John"
set :slack_emoji, ":rocket:"
set :slack_deploy_defaults, false #gem provides the standared before and after callbacks deploy:starting and deploy:finished deploy of set to false and provide your own. 
#example slack:starting and slack:finished are the only defaults provided in the gem. 

You can obtain your webhook_token from the integrations section of the team page in Slack.

https://kohactive.slack.com/services/new/incoming-webhook (if your subdomain is kohactive.slack.com)

Add custom messages to callbacks

namespace :slack do
    namespace :migration do 
        task :start do 
            @migration_start_time = Time.now
            msg = "Running Migrations"
            slack_connect(msg)
        end
        task :end do 
            elapsed_time = Time.now.to_i - @migration_start_time.to_i   if @migration_start_time
            msg = "Migrations finished in #{elapsed_time} seconds"
            slack_connect(msg)
        end
    end
    before "deploy:migrate", "slack:migration:start"
    after  "deploy:migrate", "slack:migration:end"