Add post-deploy and post-rollback hooks

These replace the custom audit_broadcast_cmd code. An additional env
variable MRSK_RUNTIME is passed to them.

The audit broadcast after booting an accessory has been removed.

test/integration/docker/deployer/app/.mrsk/hooks/post-deploy

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "Deployed!"
+mkdir -p /tmp/${TEST_ID} && touch /tmp/${TEST_ID}/post-deploy

test/integration/docker/deployer/app/.mrsk/hooks/post-rollback

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "Rolled back!"
+mkdir -p /tmp/${TEST_ID} && touch /tmp/${TEST_ID}/post-rollback

test/integration/integration_test.rb

@@ -83,10 +83,10 @@ class IntegrationTest < ActiveSupport::TestCase
       assert_equal version, response.body.strip
     end
 
-    def assert_hooks_ran
-      [ "pre-build" ].each do |hook|
+    def assert_hooks_ran(*hooks)
+      hooks.each do |hook|
         file = "/tmp/#{ENV["TEST_ID"]}/#{hook}"
-        assert_match /File: #{file}/, deployer_exec("stat #{file}", capture: true)
+        assert_equal "removed '#{file}'", deployer_exec("rm -v #{file}", capture: true).strip
       end
     end
 

test/integration/main_test.rb

@@ -7,23 +7,20 @@ class MainTest < IntegrationTest
     assert_app_is_down
 
     mrsk :deploy
-
-    assert_hooks_ran
-
     assert_app_is_up version: first_version
+    assert_hooks_ran "pre-build", "post-deploy"
 
     second_version = update_app_rev
 
     mrsk :redeploy
-
     assert_app_is_up version: second_version
+    assert_hooks_ran "pre-build", "post-deploy"
 
     mrsk :rollback, first_version
-
+    assert_hooks_ran "post-rollback"
     assert_app_is_up version: first_version
 
     details = mrsk :details, capture: true
-
     assert_match /Traefik Host: vm1/, details
     assert_match /Traefik Host: vm2/, details
     assert_match /App Host: vm1/, details
@@ -32,7 +29,6 @@ class MainTest < IntegrationTest
     assert_match /registry:4443\/app:#{first_version}/, details
 
     audit = mrsk :audit, capture: true
-
     assert_match /Booted app version #{first_version}.*Booted app version #{second_version}.*Booted app version #{first_version}.*/m, audit
   end