From f16757baafe81e5cadbb8e5525a9f167594ac839 Mon Sep 17 00:00:00 2001
From: Valentin Tolmer <valentin@tolmer.fr>
Date: Sat, 6 May 2023 14:29:20 +0200
Subject: [PATCH] core: Make sure to initialize the default logger

The default logger is never initialized, even if there is a default
logger factory. As a result, the basic logger example segfaults when
run. Note that by default, the default logger also doesn't have a sink,
so we have to set one up in the example to get any output.
---
 examples/BasicLogger.cpp | 3 +++
 src/LoggerRegistry.cpp   | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/examples/BasicLogger.cpp b/examples/BasicLogger.cpp
index ad6d5ec..4e407c0 100644
--- a/examples/BasicLogger.cpp
+++ b/examples/BasicLogger.cpp
@@ -50,6 +50,9 @@ int main(int argc, const char* argv[])
 {
     // Set the global logger level to Debug
     logpp::setLevel(logpp::LogLevel::Debug);
+    auto formatter = std::make_shared<logpp::LogFmtFormatter>();
+    auto consoleOut = std::make_shared<logpp::sink::ColoredOutputConsole>(formatter);
+    logpp::defaultLogger()->setSink(consoleOut);
 
     // Uncomment this line to log lines in logfmt format
     // logpp::setFormatter<logpp::LogFmtFormatter>();
diff --git a/src/LoggerRegistry.cpp b/src/LoggerRegistry.cpp
index 21f247a..23d2b20 100644
--- a/src/LoggerRegistry.cpp
+++ b/src/LoggerRegistry.cpp
@@ -127,6 +127,9 @@ namespace logpp
     std::shared_ptr<Logger> LoggerRegistry::defaultLogger()
     {
         std::lock_guard guard(m_mutex);
+        if (m_defaultLogger == nullptr) {
+          m_defaultLogger = m_defaultLoggerFactory("logpp");
+        }
         return m_defaultLogger;
     }