Run Ansible from Slack Ruby Bot (https://github.com/slack-ruby/slack-ruby-bot)

ansible-play.rb

# deploybot/commands/ansible-play.rb
module Deploybot
  module Commands
    class AnsiblePlay < SlackRubyBot::Commands::Base
      class AnsibleRunner
        attr_reader :playbook

        def initialize(playbook)
          @playbook = playbook
        end

        def run
          `#{command} 2>&1`
        end

        def command
          "#{playbook_cmd} #{playbook_folder}/#{playbook} -i #{inventory}"
        end

        def playbook_folder
          @playbook_folder ||= (ENV['ANSIBLE_PLAYBOOK_FOLDER'] ? ENV['ANSIBLE_PLAYBOOK_FOLDER'] : '/var/ansible/playbooks')
        end

        def playbook_cmd
          @playbook_cmd ||= (ENV['ANSIBLE_BIN'] ? ENV['ANSIBLE_BIN'] : '/usr/bin/ansible-playbook')
        end

        def inventory
          @inventory ||= (ENV['ANSIBLE_HOSTS_FILE'] ? ENV['ANSIBLE_HOSTS_FILE'] : '/etc/ansible/hosts')
        end

        def success?
          $?.success?
        end
      end

      def self.ansible(client, channel, playbook)
        ar = AnsibleRunner.new(playbook)
        client.say(channel: channel, text: "Trying to execute `#{ar.command}`")
        output = ar.run

        client.say(channel: channel, text: "```\n#{output}\n```")
        if ar.success?
          client.say(channel: channel, text: 'It worked!')
        else
          client.say(channel: channel, text: 'It didn\'t work... :(')
        end
      end

      command 'whoami' do |client, data, match|
        client.say(channel: data.channel, text: "You are <@#{data.user}> / #{data.user}")
      end

      match(/\!ansible (?<playbook>[^\s]+\.yml)/) do |client, data, match|
        unless data.user == ENV['SLACK_AUTHED_USER']
          client.say(channel: data.channel, text: "<@#{ENV['SLACK_AUTHED_USER']}> someone is screwing with me: <@#{data.user}>")
          return
        end

        ansible(client, data.channel, match[:playbook])
      end
    end
  end
end