feat(Core/DBUpdater): implement db auto update (#6576)

* feat(Core/DBUpdater): implement db auto update

* 1

* 2

* 3

* Some minor improvements

* add find bin for mysql 8.0

* lic

Co-authored-by: Kitzunu <24550914+Kitzunu@users.noreply.github.com>

src/common/Configuration/BuiltInConfig.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#include "BuiltInConfig.h"
+#include "Config.h"
+#include "GitRevision.h"
+
+template<typename Fn>
+static std::string GetStringWithDefaultValueFromFunction(
+    std::string const& key, Fn getter)
+{
+    std::string const value = sConfigMgr->GetOption<std::string>(key, "");
+    return value.empty() ? getter() : value;
+}
+
+std::string BuiltInConfig::GetCMakeCommand()
+{
+    return GetStringWithDefaultValueFromFunction(
+        "CMakeCommand", GitRevision::GetCMakeCommand);
+}
+
+std::string BuiltInConfig::GetBuildDirectory()
+{
+    return GetStringWithDefaultValueFromFunction(
+        "BuildDirectory", GitRevision::GetBuildDirectory);
+}
+
+std::string BuiltInConfig::GetSourceDirectory()
+{
+    return GetStringWithDefaultValueFromFunction(
+        "SourceDirectory", GitRevision::GetSourceDirectory);
+}
+
+std::string BuiltInConfig::GetMySQLExecutable()
+{
+    return GetStringWithDefaultValueFromFunction(
+        "MySQLExecutable", GitRevision::GetMySQLExecutable);
+}

src/common/Configuration/BuiltInConfig.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef BUILT_IN_CONFIG_H
+#define BUILT_IN_CONFIG_H
+
+#include "Define.h"
+#include <string>
+
+/// Provides helper functions to access built-in values
+/// which can be overwritten in config
+namespace BuiltInConfig
+{
+    /// Returns the CMake command when any is specified in the config,
+    /// returns the built-in path otherwise
+    AC_COMMON_API std::string GetCMakeCommand();
+
+    /// Returns the build directory path when any is specified in the config,
+    /// returns the built-in one otherwise
+    AC_COMMON_API std::string GetBuildDirectory();
+
+    /// Returns the source directory path when any is specified in the config,
+    /// returns the built-in one otherwise
+    AC_COMMON_API std::string GetSourceDirectory();
+
+    /// Returns the path to the mysql executable (`mysql`) when any is specified
+    /// in the config, returns the built-in one otherwise
+    AC_COMMON_API std::string GetMySQLExecutable();
+
+} // namespace BuiltInConfig
+
+#endif // BUILT_IN_CONFIG_H