Add unattended upgrade support

src/Umbraco.Core/Runtime/CoreRuntime.cs

@@ -13,6 +13,7 @@ using Umbraco.Core.IO;
 using Umbraco.Core.Logging;
 using Umbraco.Core.Logging.Serilog;
 using Umbraco.Core.Migrations.Install;
+using Umbraco.Core.Migrations.Upgrade;
 using Umbraco.Core.Persistence;
 using Umbraco.Core.Persistence.Mappers;
 using Umbraco.Core.Sync;
@@ -189,6 +190,16 @@ namespace Umbraco.Core.Runtime
                 // create the factory
                 _factory = Current.Factory = composition.CreateFactory();
 
+                // if level is Run and reason is UpgradeMigrations, that means we need to perform an unattended upgrade
+                if (_state.Reason == RuntimeLevelReason.UpgradeMigrations && _state.Level == RuntimeLevel.Run)
+                {
+                    // do the upgrade
+                    DoUnattendedUpgrade(_factory.GetInstance<DatabaseBuilder>());
+
+                    // upgrade is done, set reason to Run
+                    _state.Reason = RuntimeLevelReason.Run;
+                }
+
                 // create & initialize the components
                 _components = _factory.GetInstance<ComponentCollection>();
                 _components.Initialize();
@@ -288,6 +299,17 @@ namespace Umbraco.Core.Runtime
             }
         }
 
+        private void DoUnattendedUpgrade(DatabaseBuilder databaseBuilder)
+        {
+            var plan = new UmbracoPlan();
+            Logger.Info<CoreRuntime>("Starting unattended upgrade.");
+            var result = databaseBuilder.UpgradeSchemaAndData(plan);
+            Logger.Info<CoreRuntime>("Unattended upgrade completed.");
+
+            if (result.Success == false)
+                throw new UnattendedInstallException("An error occurred while running the unattended upgrade.\n" + result.Message);
+        }
+
         protected virtual void ConfigureUnhandledException()
         {
             //take care of unhandled exceptions - there is nothing we can do to

src/Umbraco.Core/RuntimeOptions.cs

@@ -23,6 +23,7 @@ namespace Umbraco.Core
         private static bool? _installMissingDatabase;
         private static bool? _installEmptyDatabase;
         private static bool? _installUnattended;
+        private static bool? _upgradeUnattended;
 
         // reads a boolean appSetting
         private static bool BoolSetting(string key, bool missing) => ConfigurationManager.AppSettings[key]?.InvariantEquals("true") ?? missing;
@@ -66,6 +67,15 @@ namespace Umbraco.Core
             set => _installUnattended = value;
         }
 
+        /// <summary>
+        /// Gets a value indicating whether unattended upgrade is enabled.
+        /// </summary>
+        public static bool UpgradeUnattended
+        {
+            get => _upgradeUnattended ?? BoolSetting("Umbraco.Core.RuntimeState.UpgradeUnattended", false);
+            set => _upgradeUnattended = value;
+        }
+
         /// <summary>
         /// Executes the RuntimeBoot handlers.
         /// </summary>

src/Umbraco.Core/RuntimeState.cs

@@ -130,7 +130,7 @@ namespace Umbraco.Core
         {
             var localVersion = UmbracoVersion.LocalVersion; // the local, files, version
             var codeVersion = SemanticVersion; // the executing code version
-            
+
             if (localVersion == null)
             {
                 // there is no local version, we are not installed
@@ -202,7 +202,7 @@ namespace Umbraco.Core
                         // although the files version matches the code version, the database version does not
                         // which means the local files have been upgraded but not the database - need to upgrade
                         _logger.Debug<RuntimeState>("Has not reached the final upgrade step, need to upgrade Umbraco.");
-                        Level = RuntimeLevel.Upgrade;
+                        Level = RuntimeOptions.UpgradeUnattended ? RuntimeLevel.Run : RuntimeLevel.Upgrade;
                         Reason = RuntimeLevelReason.UpgradeMigrations;
                     }
                     break;