core/log: add fancy logger

src/core/CMakeLists.txt

@@ -37,6 +37,7 @@ qt_add_library(quickshell-core STATIC
 	types.cpp
 	qsmenuanchor.cpp
 	clock.cpp
+	logging.cpp
 )
 
 set_source_files_properties(main.cpp PROPERTIES COMPILE_DEFINITIONS GIT_REVISION="${GIT_REVISION}")

src/core/logging.cpp

@@ -0,0 +1,74 @@
+#include "logging.hpp"
+#include <cstdio>
+#include <cstring>
+
+#include <qlogging.h>
+#include <qstring.h>
+#include <qtenvironmentvariables.h>
+
+namespace {
+
+bool COLOR_LOGS = false; // NOLINT
+
+void formatMessage(
+    QtMsgType type,
+    const QMessageLogContext& context,
+    const QString& msg,
+    bool color
+) {
+	const auto* typeString = "[log error]";
+
+	if (color) {
+		switch (type) {
+		case QtDebugMsg: typeString = "\033[34m DEBUG"; break;
+		case QtInfoMsg: typeString = "\033[32m  INFO"; break;
+		case QtWarningMsg: typeString = "\033[33m  WARN"; break;
+		case QtCriticalMsg: typeString = "\033[31m ERROR"; break;
+		case QtFatalMsg: typeString = "\033[31m FATAL"; break;
+		}
+	} else {
+		switch (type) {
+		case QtDebugMsg: typeString = " DEBUG"; break;
+		case QtInfoMsg: typeString = "  INFO"; break;
+		case QtWarningMsg: typeString = "  WARN"; break;
+		case QtCriticalMsg: typeString = " ERROR"; break;
+		case QtFatalMsg: typeString = " FATAL"; break;
+		}
+	}
+
+	const auto isDefault = strcmp(context.category, "default") == 0;
+
+	const char* format = nullptr;
+
+	if (color) {
+		if (type == QtFatalMsg) {
+			if (isDefault) format = "%s: %s\033[0m\n";
+			else format = "%s %s: %s\033[0m\n";
+		} else {
+			if (isDefault) format = "%s\033[0m: %s\n";
+			else format = "%s \033[97m%s\033[0m: %s\n";
+		}
+	} else {
+		if (isDefault) format = "%s: %s\n";
+		else format = "%s %s: %s\n";
+	}
+
+	if (isDefault) {
+		printf(format, typeString, msg.toStdString().c_str());
+	} else {
+		printf(format, typeString, context.category, msg.toStdString().c_str());
+	}
+
+	fflush(stdout);
+}
+
+void messageHandler(QtMsgType type, const QMessageLogContext& context, const QString& msg) {
+	formatMessage(type, context, msg, COLOR_LOGS);
+}
+
+} // namespace
+
+void LogManager::setup() {
+	COLOR_LOGS = qEnvironmentVariableIsEmpty("NO_COLOR");
+	qInstallMessageHandler(&messageHandler);
+}

src/core/logging.hpp

@@ -0,0 +1,6 @@
+#pragma once
+
+class LogManager {
+public:
+	static void setup();
+};

src/core/main.cpp

@@ -22,10 +22,12 @@
 #include <qtextstream.h>
 #include <qtpreprocessorsupport.h>
 
+#include "logging.hpp"
 #include "plugin.hpp"
 #include "rootwrapper.hpp"
 
 int qs_main(int argc, char** argv) {
+	LogManager::setup();
 	QString configFilePath;
 	QString workingDirectory;
 
@@ -330,11 +332,9 @@ int qs_main(int argc, char** argv) {
 		file.close();
 	}
 
+	qInfo() << "shell id:" << shellId;
 
-	if (printCurrent) {
-		qInfo() << "shell id:" << shellId;
-		return 0;
-	}
+	if (printCurrent) return 0;
 
 	for (auto [var, val]: envOverrides.asKeyValueRange()) {
 		qputenv(var.toUtf8(), val.toUtf8());