first commit

.gitignore

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+Gemfile.lock
+pkg
+tmp

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in capistrano-telegram.gemspec
+gemspec
+
+gem 'pry'
+gem 'awesome_print'
+gem 'telegram-bot-ruby'

LICENSE

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+MIT License
+
+Copyright (c) 2019 Mattia Malonni
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Capistrano - Telegram Notification
+
+Send notifications to Telegram about Capistrano deployments.
+
+## Installation
+
+1. Add this line to your application's Gemfile:
+
+   ```ruby
+   gem 'capistrano-telegram'
+   ```
+
+2. Execute:
+
+   ```
+   $ bundle
+   ```
+
+3. Require the library in your application's Capfile:
+
+   ```ruby
+   require 'capistrano/telegram'
+   ```
+
+### config/deploy.rb
+
+```ruby
+set :telegram_bot_key, 'YOUR_BOT_ID'
+set :telegram_chat_id, 'YOUR_BOT_CHAT_ID'
+```

Rakefile

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+require "bundler/gem_tasks"

capistrano-telegram.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'capistrano/telegram/version'
+
+Gem::Specification.new do |spec|
+  spec.name = "capistrano-telegram"
+  spec.version = Capistrano::TelegramNotification::VERSION
+  spec.authors = ["Mattia Malonni"]
+  spec.email = ["[email protected]"]
+  spec.summary = %q{Notify Capistrano deployment to Telegram.}
+  spec.description = %q{Notify Capistrano deployment to Telegram.}
+  spec.homepage = "https://github.com/MattiaMalonni/capistrano-telegram"
+  spec.license = "MIT"
+
+  spec.files = `git ls-files -z`.split("\x0")
+  spec.executables = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "telegram-bot-ruby", "~> 0.8"
+  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_development_dependency "rake", "~> 10.0"
+end

lib/capistrano/tasks/telegram.rake

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+namespace :telegram do
+  namespace :deploy do
+
+    desc 'Notify about updating deploy'
+    task :updating do
+      Capistrano::Telegram.new(self).send(:updating)
+    end
+
+    desc 'Notify about reverting deploy'
+    task :reverting do
+      Capistrano::Telegram.new(self).send(:reverting)
+    end
+
+    desc 'Notify about updated deploy'
+    task :updated do
+      Capistrano::Telegram.new(self).send(:updated)
+    end
+
+    desc 'Notify about reverted deploy'
+    task :reverted do
+      Capistrano::Telegram.new(self).send(:reverted)
+    end
+
+    desc 'Notify about failed deploy'
+    task :failed do
+      Capistrano::Telegram.new(self).send(:failed)
+    end
+
+    desc 'Test Slack integration'
+    task :test => %i[updating updated reverting reverted failed] do
+      # all tasks run as dependencies
+    end
+
+  end
+end
+
+before 'deploy:updating',           'telegram:deploy:updating'
+before 'deploy:reverting',          'telegram:deploy:reverting'
+after  'deploy:finishing',          'telegram:deploy:updated'
+after  'deploy:finishing_rollback', 'telegram:deploy:reverted'
+after  'deploy:failed',             'telegram:deploy:failed'

lib/capistrano/telegram.rb

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+require_relative 'messaging/telegram/messaging/base'
+
+require 'telegram/bot'
+
+load File.expand_path('../tasks/telegram.rake', __FILE__)
+
+module Capistrano
+  class Telegram
+
+    def initialize(env)
+      @telegram_bot_key = fetch(:telegram_bot_key, nil)
+      @telegram_chat_id = fetch(:telegram_chat_id, nil)
+      @message = Capistrano::Telegram::Messaging::Base.new
+    end
+
+    def send(action)
+      payload = @message.payload_for(action)
+      send_to_telegram(payload)
+    end
+
+    private 
+    def send_to_telegram(message)
+      Telegram::Bot::Client.run(@telegram_bot_key) do |bot|
+        bot.api.send_message(chat_id: @telegram_chat_id, text: message)
+      end
+    end
+
+  end
+end

lib/capistrano/telegram/messaging/base.rb

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+require_relative 'helpers'
+
+module Capistrano
+  module Telegram
+    module Messaging
+      class Base
+        include Helpers
+
+        def payload_for_updating
+          {
+            text: "#{deployer} has started deploying branch #{branch} of #{application} to #{stage}"
+          }
+        end
+
+        def payload_for_reverting
+          {
+            text: "#{deployer} has started rolling back branch #{branch} of #{application} to #{stage}"
+          }
+        end
+
+        def payload_for_updated
+          {
+            text: "#{deployer} has finished deploying branch #{branch} of #{application} to #{stage}"
+          }
+        end
+
+        def payload_for_reverted
+          {
+            text: "#{deployer} has finished rolling back branch of #{application} to #{stage}"
+          }
+        end
+
+        def payload_for_failed
+          {
+            text: "#{deployer} has failed to #{deploying? ? 'deploy' : 'rollback'} branch #{branch} of #{application} to #{stage}"
+          }
+        end
+
+        def payload_for(action)
+          method = "payload_for_#{action}"
+          respond_to?(method) && send(method)
+        end
+
+      end
+    end    
+  end
+end

lib/capistrano/telegram/messaging/helpers.rb

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+module Capistrano
+  module Telegram
+    module Messaging
+      module Helpers
+        def icon_emoji
+          options.fetch(:icon_emoji, nil)
+        end
+
+        def deployer
+          default = ENV['USER'] || ENV['USERNAME']
+          fetch(:local_user, default)
+        end
+
+        def branch
+          fetch(:branch)
+        end
+
+        def application
+          fetch(:application)
+        end
+
+        def stage(default = 'an unknown stage')
+          fetch(:stage, default)
+        end
+
+        #
+        # Return the elapsed running time as a string.
+        #
+        # Examples: 21-18:26:30, 15:28:37, 01:14
+        #
+        def elapsed_time
+          `ps -p #{$$} -o etime=`.strip
+        end
+
+      end        
+    end
+  end
+end

lib/capistrano/telegram/version.rb

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+module Capistrano
+  module Telegram
+    VERSION = '0.1.1'
+  end
+end