Capistrano Slack

Capfile

require 'slackistrano/capistrano'
require_relative 'lib/slack_message'

deploy.rb

set :slackistrano, {
  channel: '#your_channel',
  webhook: 'https://hooks.slack.com/services/foo/bar/baz/qux',
  klass: Slackistrano::SlackMessage,
}

Gemfile

gem 'slackistrano'

slack_message.rb

#lib/slack_message.rb
if defined?(Slackistrano::Messaging)
  module Slackistrano
    class SlackMessage < Messaging::Base
      def username
        # displaied user name in Slack
      end

      def icon_url
        # disaplaied user icon in Slack
      end

      def payload_for_updating
        {
            attachments: [{
                              color: '#29B2EF',
                              title: 'Deploing is starting :rocket:',
                              fields: [{
                                           title: 'Environment',
                                           value: stage,
                                           short: true
                                       }, {
                                           title: 'Branch',
                                           value: branch,
                                           short: true
                                       }, {
                                           title: 'Deployer',
                                           value: deployer,
                                           short: true
                                       }],
                              fallback: super[:text]
                          }]
        }
      end

      def payload_for_updated
        {
            attachments: [{
                              color: 'good',
                              title: 'Deploing is success :sparkles:',
                              fields: [{
                                           title: 'Environment',
                                           value: stage,
                                           short: true
                                       }, {
                                           title: 'Branch',
                                           value: branch,
                                           short: true
                                       }, {
                                           title: 'Deployer',
                                           value: deployer,
                                           short: true
                                       }, {
                                           title: 'Time',
                                           value: elapsed_time,
                                           short: true
                                       }],
                              fallback: super[:text]
                          }]
        }
      end

      def payload_for_failed
        {
            attachments: [{
                              color: 'danger',
                              title: 'Deploing is fail :boom:',
                              fields: [{
                                           title: 'Environment',
                                           value: stage,
                                           short: true
                                       }, {
                                           title: 'Branch',
                                           value: branch,
                                           short: true
                                       }, {
                                           title: 'Deployer',
                                           value: deployer,
                                           short: true
                                       }, {
                                           title: 'Time',
                                           value: elapsed_time,
                                           short: true
                                       }],
                              fallback: super[:text]
                          }]
        }
      end

      # Default reverted message.  Alternatively simply do not redefine this
      # method.
      def payload_for_reverted
        super
      end

      # Override the deployer helper to pull the best name available (git, password file, env vars).
      # See https://github.com/phallstrom/slackistrano/blob/master/lib/slackistrano/messaging/helpers.rb
      def deployer
        name = `git config user.name`.strip
        name = nil if name.empty?
        name ||= Etc.getpwnam(ENV['USER']).gecos || ENV['USER'] || ENV['USERNAME']
        name
      end
    end
  end
end