fix(deploy): Fixed deploy callbacks launching order

The issue was, that all driver callbacks (i.e. invoked from deploy_before_restart,
deploy_after_restart etc. methods) were launched after deploy was completely finished (instead at
proper callback time). However `deploy/after_restart.rb` etc. callbacks from projects were launched
during callback phase. This could lead to the problems, for example: `deploy/after_restart.rb` might
be dependant on `deploy_before_restart` action from the drivers and would crash if not fullified. Up
to this commit, this would happend. However this fix ensures, that both driver and app callbacks are
launched at the same time (first drivers, then app). It was resolved, by setting correct context to
the drivers. When driver is in "callback phase" it expects a "callback context", otherwise it would
assume, that action is fired up in deploy recipe context, and thus - move it down to the queue.

libraries/drivers_base.rb

@@ -1,7 +1,9 @@
 # frozen_string_literal: true
 module Drivers
   class Base
-    attr_reader :context, :app, :options, :configuration_data_source
+    attr_reader :app, :options, :configuration_data_source
+    attr_accessor :context
+
     def initialize(context, app, options = {})
       @context = context
       @app = app

libraries/helpers.rb

@@ -22,7 +22,10 @@ def globals
 
 def fire_hook(name, options)
   Array.wrap(options[:items]).each do |item|
+    old_context = item.context
+    item.context = options[:context] if options[:context].present?
     item.send(name)
+    item.context = old_context
   end
 end
 

recipes/deploy.rb

@@ -54,15 +54,19 @@
     before_migrate do
       perform_bundle_install(shared_path, bundle_env)
 
-      fire_hook(:deploy_before_migrate, items: databases + [scm, framework, appserver, worker, webserver])
+      fire_hook(
+        :deploy_before_migrate, context: self, items: databases + [scm, framework, appserver, worker, webserver]
+      )
 
       run_callback_from_file(File.join(release_path, 'deploy', 'before_migrate.rb'))
     end
 
     before_symlink do
       perform_bundle_install(shared_path, bundle_env) unless framework.out[:migrate]
 
-      fire_hook(:deploy_before_symlink, items: databases + [scm, framework, appserver, worker, webserver])
+      fire_hook(
+        :deploy_before_symlink, context: self, items: databases + [scm, framework, appserver, worker, webserver]
+      )
 
       run_callback_from_file(File.join(release_path, 'deploy', 'before_symlink.rb'))
     end
@@ -73,13 +77,17 @@
         action :delete
       end if scm.out[:remove_scm_files]
 
-      fire_hook(:deploy_before_restart, items: databases + [scm, framework, appserver, worker, webserver])
+      fire_hook(
+        :deploy_before_restart, context: self, items: databases + [scm, framework, appserver, worker, webserver]
+      )
 
       run_callback_from_file(File.join(release_path, 'deploy', 'before_restart.rb'))
     end
 
     after_restart do
-      fire_hook(:deploy_after_restart, items: databases + [scm, framework, appserver, worker, webserver])
+      fire_hook(
+        :deploy_after_restart, context: self, items: databases + [scm, framework, appserver, worker, webserver]
+      )
 
       run_callback_from_file(File.join(release_path, 'deploy', 'after_restart.rb'))
     end