Prepare capistrano/db migrations to support more setups (#2)

The following parameters have been added to deploy-secrets.yml:

* **use_rvm**: yes/no
* **ruby_version**: Ruby version for rvm. Defaults to 2.3.2
* **repository**: Git repository. Defaults to the oficial repository
* **branch**: Branch to deploy. Defaults to master
* **rails_env**: Defaults to the stage.

Fixed migrations that required admin rights. Now first check if the postgress extensions are available. If so finish without doing nothin.

Added support for passenger.

Capfile

@@ -10,7 +10,6 @@ require 'capistrano/rails/migrations'
 #require 'capistrano/passenger'
 require 'capistrano/delayed_job'
 require 'whenever/capistrano'
-require 'rvm1/capistrano3'
 
 #SCM: Git
 require "capistrano/scm/git"

config/deploy-secrets.yml.example

@@ -6,6 +6,11 @@ staging:
   user: "xxxxx"
   server_name: "staging.consul.es"
   full_app_name: "consul"
+# use_rvm: Yes
+# ruby_version: 2.3.7
+# repository: https://github.com/consul/consul.git
+# branch: master
+# rails_env: staging
 
 preproduction:
   deploy_to: "/var/www/consul"

config/deploy.rb

@@ -1,19 +1,23 @@
 # config valid only for current version of Capistrano
 lock '~> 3.10.1'
 
-def deploysecret(key)
+def deploysecret(key, default = 'undefined')
   @deploy_secrets_yml ||= YAML.load_file('config/deploy-secrets.yml')[fetch(:stage).to_s]
-  @deploy_secrets_yml.fetch(key.to_s, 'undefined')
+  @deploy_secrets_yml.fetch(key.to_s, default)
 end
 
 set :rails_env, fetch(:stage)
-set :rvm1_ruby_version, '2.3.2'
+
+if deploysecret(:use_rvm, true)
+  require 'rvm1/capistrano3'
+  set :rvm1_ruby_version, deploysecret(:ruby_version, '2.3.2') 
+end
 
 set :application, 'consul'
 set :full_app_name, deploysecret(:full_app_name)
 
 set :server_name, deploysecret(:server_name)
-set :repo_url, 'https://github.com/consul/consul.git'
+set :repo_url, deploysecret(:repository, 'https://github.com/consul/consul.git')
 
 set :revision, `git rev-parse --short #{fetch(:branch)}`.strip
 
@@ -40,10 +44,22 @@ set(:config_files, %w(
 
 set :whenever_roles, -> { :app }
 
+set :user, deploysecret(:user)
+set :ssh_options, -> {
+  {
+    user: deploysecret(:user),
+    forward_agent: true,
+    compression: 'none',
+    port: deploysecret(:ssh_port)
+  }
+}
+
 namespace :deploy do
+  if deploysecret(:use_rvm, true) 
     before :starting, 'rvm1:install:rvm'  # install/update RVM
     before :starting, 'rvm1:install:ruby' # install Ruby and create gemset
     before :starting, 'install_bundler_gem' # install bundler gem
+  end
 
   after :publishing, 'deploy:restart'
   after :published, 'delayed_job:restart'

config/deploy/preproduction.rb

@@ -2,7 +2,6 @@ set :deploy_to, deploysecret(:deploy_to)
 set :server_name, deploysecret(:server_name)
 set :db_server, deploysecret(:db_server)
 set :branch, ENV['branch'] || :master
-set :ssh_options, port: deploysecret(:ssh_port)
 set :stage, :preproduction
 set :rails_env, :preproduction
 

config/deploy/production.rb

@@ -2,7 +2,6 @@ set :deploy_to, deploysecret(:deploy_to)
 set :server_name, deploysecret(:server_name)
 set :db_server, deploysecret(:db_server)
 set :branch, :stable
-set :ssh_options, port: deploysecret(:ssh_port)
 set :stage, :production
 set :rails_env, :production
 

config/deploy/staging.rb

@@ -1,11 +1,9 @@
-set :deploy_to, deploysecret(:deploy_to)
+set :deploy_to, -> { deploysecret(:deploy_to) }
 set :server_name, deploysecret(:server_name)
 set :db_server, deploysecret(:db_server)
-set :branch, ENV['branch'] || :master
-set :ssh_options, port: deploysecret(:ssh_port)
+set :branch, deploysecret(:branch, ENV['branch']) || :master
 set :stage, :staging
-set :rails_env, :staging
+set :rails_env, deploysecret(:rails_env, 'staging').to_sym
 
 server deploysecret(:server), user: deploysecret(:user), roles: %w(web app db importer cron)
 
-

db/migrate/20151028213830_add_unaccent_extension.rb

@@ -1,5 +1,11 @@
 class AddUnaccentExtension < ActiveRecord::Migration
   def change
-    execute "create extension if not exists unaccent"
+    return if extension_enabled?('unaccent')
+
+    begin
+      enable_extension 'unaccent'
+    rescue StandardError => e
+      raise "Could not create extension unaccent. Please contact with your system administrator: #{e}"
+    end
   end
 end

db/migrate/20151028221647_add_pg_trgm_extension.rb

@@ -1,5 +1,11 @@
 class AddPgTrgmExtension < ActiveRecord::Migration
   def change
-    execute "create extension if not exists pg_trgm"
+    return if extension_enabled?('pg_trgm')
+
+    begin
+      enable_extension 'pg_trgm'
+    rescue StandardError => e
+      raise "Could not create extension pg_trgm. Please contact with your system administrator: #{e}"
+    end
   end
 end

docker-compose.yml

@@ -35,6 +35,9 @@ services:
     volumes:
       - .:/var/www/consul:delegated
       - bundle:/usr/local/bundle:delegated
+      - "$SSH_AUTH_SOCK:/tmp/agent.sock"
+    environment:
+      - SSH_AUTH_SOCK=/tmp/agent.sock
 volumes:
   docker-example-postgres: {}
   bundle: {}

lib/capistrano/tasks/restart.cap

@@ -1,5 +1,6 @@
 namespace :deploy do
-  desc 'Commands for unicorn application'
+  desc 'Commands for passenger/unicorn application'
+  if File.exist?("/etc/init.d/unicorn_#{fetch(:full_app_name)}")
     %w(start stop force-stop restart upgrade reopen-logs).each do |command|
       task command.to_sym do
         on roles(:app), in: :sequence, wait: 5 do
@@ -7,4 +8,12 @@ namespace :deploy do
         end
       end
     end
+  else
+    task :restart do
+      on roles(:app), in: :sequence, wait: 5 do
+        # Your restart mechanism here, for example:
+        execute :touch, release_path.join('tmp/restart.txt')
+      end
+    end
+  end
 end