Minimalistic slack bot notifier approach for rails apps - useful for capistrano deploy scripts

slack_bot.rb

#!/usr/bin/env ruby
# frozen_string_literal: true

require_relative '../config/boot'
require_relative '../config/environment'
require 'slack'

Slack.configure do |config|
  config.token = Rails.application.secrets.slack_bot[:token]
end

slack_channel = Rails.application.secrets.slack_bot[:channel]
slack_bot = Slack::Web::Client.new
slack_bot.chat_postMessage(
  channel: slack_channel,
  text: 'deployed successfully',
  as_user: true
)

# secrets.yml

=begin
  :slack_bot:
    :token: 'sample_token'
    :channel: '#notifications'
=end

=begin
 STEPS
 1. add gem 'slack-ruby-client' to Gemfile and bundle install
 2. copy this to bin/slack_notifier.rb
 3. chmod +x bin/slack_notifier.rb
 4. set up secrets
 5. bin/slack_notifier.rb
 6. see your message on the slack
 =end