Core/Config: Implement config override with env vars (#26811)

* Core/Config: Implement config override with env vars

Implement overriding of configuration from the .conf file with environment variables.
Environment variables keys are autogenerated based on the keys defined in .conf file.
Usage example:
$ export TC_DATA_DIR=/usr
$ TC_WORLD_SERVER_PORT=8080 ./worldserver

* Core/Config Fix typo in logs

Co-authored-by: Giacomo Pozzoni <giacomopoz@gmail.com>

* Core/Config Fix code style in EnvVarForIniKey

Co-authored-by: Shauren <shauren.trinity@gmail.com>

* Update tests/common/Config.cpp

* Apply suggestions from code review

Co-authored-by: Peter Keresztes Schmidt <carbenium@outlook.com>

* Apply suggestions from code review

Co-authored-by: Peter Keresztes Schmidt <carbenium@outlook.com>

Co-authored-by: Anton Popovichenko <anton.popovichenko@mendix.com>
Co-authored-by: Giacomo Pozzoni <giacomopoz@gmail.com>
Co-authored-by: Shauren <shauren.trinity@gmail.com>
Co-authored-by: Peter Keresztes Schmidt <carbenium@outlook.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/server/authserver/Main.cpp b/src/server/authserver/Main.cpp
index 7a6a5037676..af0acb97236 100644
--- a/src/server/authserver/Main.cpp
+++ b/src/server/authserver/Main.cpp
@@ -108,6 +108,8 @@ int main(int argc, char** argv)
         return 1;
     }
 
+    std::vector<std::string> overriddenKeys = sConfigMgr->OverrideWithEnvVariablesIfAny();
+
     sLog->RegisterAppender<AppenderDB>();
     sLog->Initialize(nullptr);
 
@@ -124,6 +126,9 @@ int main(int argc, char** argv)
         }
     );
 
+    for (std::string const& key : overriddenKeys)
+        TC_LOG_INFO("server.authserver", "Configuration field '%s' was overridden with environment variable.", key.c_str());
+
     // authserver PID file creation
     std::string pidFile = sConfigMgr->GetStringDefault("PidFile", "");
     if (!pidFile.empty())