Core/Game: Add a dynamic script reloader which reloads scripts modules on changes.

* is responsible for registering plain modules.
* requires compilation with the `WITH_DYNAMIC_LINKING` flag.
* requires further support of the ScriptMgr.

(cherry picked from commit bc0f2b6e5acd24f414508edb3b826a20a12bce62)

2 files changed, 76 insertions, 0 deletions

diff --git a/src/server/worldserver/Main.cpp b/src/server/worldserver/Main.cpp
index c047c1fafc3..2b5553b4bb0 100644
--- a/src/server/worldserver/Main.cpp
+++ b/src/server/worldserver/Main.cpp
@@ -39,6 +39,7 @@
 #include "InstanceSaveMgr.h"
 #include "ObjectAccessor.h"
 #include "ScriptMgr.h"
+#include "ScriptReloadMgr.h"
 #include "ScriptLoader.h"
 #include "OutdoorPvP/OutdoorPvPMgr.h"
 #include "BattlegroundMgr.h"
@@ -271,6 +272,7 @@ extern int main(int argc, char** argv)
     sOutdoorPvPMgr->Die();
     sMapMgr->UnloadAll();                     // unload all grids (including locked in memory)
     sScriptMgr->Unload();
+    sScriptReloadMgr->Unload();
 
     // set server offline
     LoginDatabase.DirectPExecute("UPDATE realmlist SET flag = flag | %u WHERE id = '%d'", REALM_FLAG_OFFLINE, realm.Id.Realm);
diff --git a/src/server/worldserver/worldserver.conf.dist b/src/server/worldserver/worldserver.conf.dist
index 7c512d8ae6e..2501636a9ea 100644
--- a/src/server/worldserver/worldserver.conf.dist
+++ b/src/server/worldserver/worldserver.conf.dist
@@ -12,6 +12,7 @@
 #    SERVER LOGGING
 #    SERVER SETTINGS
 #    UPDATE SETTINGS
+#    HOTSWAP SETTINGS
 #    WARDEN SETTINGS
 #    PLAYER INTERACTION
 #    CREATURE SETTINGS
@@ -1280,6 +1281,78 @@ Updates.CleanDeadRefMaxCount = 3
 ###################################################################################################
 
 ###################################################################################################
+# HOTSWAP SETTINGS
+#
+#    HotSwap.Enabled (Requires compilation with DYNAMIC_LINKING=1)
+#        Description: Enables dynamic script hotswapping.
+#                     Reloads scripts on changes.
+#        Default:     1 - (Enabled)
+#                     0 - (Disabled)
+
+HotSwap.Enabled = 1
+
+#
+#    HotSwap.ScriptDir
+#        Description: Directory containing the script shared libraries (.dll/.so).
+#        Example:     "/usr/local/scripts"
+#        Default:     "scripts"
+
+HotSwap.ScriptDir = "scripts"
+
+#    HotSwap.EnableReCompiler
+#        Description: Enables the dynamic script recompiler.
+#                     Watches your script source directories and recompiles the
+#                     script modules on changes.
+#        Default:     0 - (Disabled)
+#                     1 - (Enabled)
+
+HotSwap.EnableReCompiler = 1
+
+#    HotSwap.EnableEarlyTermination
+#        Description: Terminate the build of a module when an associated
+#                     source file was changed meanwhile.
+#        Default:     1 - (Enabled)
+#                     0 - (Disabled)
+
+HotSwap.EnableEarlyTermination = 1
+
+#    HotSwap.EnableBuildFileRecreation
+#        Description: Recreate build files when sources to a module
+#                     were added or removed.
+#        Default:     1 - (Enabled)
+#                     0 - (Disabled)
+
+HotSwap.EnableBuildFileRecreation = 1
+
+#
+#    HotSwap.EnableInstall
+#        Description: Enables cmake install after automatic builds have finished
+#        Default:     1 - (Enabled)
+#                     0 - (Disabled)
+
+HotSwap.EnableInstall = 1
+
+#
+#    HotSwap.EnablePrefixCorrection
+#        Description: Allows the core to automatic set the CMAKE_INSTALL_PREFIX
+#                     to it's current location in the filesystem.
+#        Default:     1 - (Enabled)
+#                     0 - (Disabled)
+
+HotSwap.EnablePrefixCorrection = 1
+
+#    HotSwap.ReCompilerBuildType
+#        Description: Defines the build type of the builds invoked by the recompiler.
+#        Default:     "" - Built-in build type of the module is used.
+#                     "Release" - Release builds only
+#                     "Debug" - Debug builds only
+
+HotSwap.ReCompilerBuildType = ""
+
+#
+###################################################################################################
+
+###################################################################################################
 # WARDEN SETTINGS
 #
 #    Warden.Enabled
@@ -3551,6 +3624,7 @@ Logger.mmaps=3,Server
 #Logger.rbac=3,Console Server
 #Logger.scripts=3,Console Server
 #Logger.scripts.ai=3,Console Server
+#Logger.scripts.hotswap=3,Console Server
 #Logger.server.authserver=3,Console Server
 #Logger.spells=3,Console Server
 #Logger.spells.periodic=3,Console Server