log qt/qml to easylogging, add --log-file cmdline option

main.cpp

@@ -54,6 +54,7 @@
 #include "Subaddress.h"
 #include "model/SubaddressModel.h"
 #include "wallet/api/wallet2_api.h"
+#include "Logger.h"
 #include "MainApp.h"
 
 // IOS exclusions
@@ -70,12 +71,6 @@ bool isAndroid = false;
 bool isWindows = false;
 bool isDesktop = false;
 
-void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
-{
-    // Send all message types to logger
-    Monero::Wallet::debug("qml", msg.toStdString());
-}
-
 int main(int argc, char *argv[])
 {
     // platform dependant settings
@@ -117,16 +112,24 @@ int main(int argc, char *argv[])
     app.installEventFilter(eventFilter);
 
     QCommandLineParser parser;
+    QCommandLineOption logPathOption(QStringList() << "l" << "log-file",
+        QCoreApplication::translate("main", "Log to specified file"),
+        QCoreApplication::translate("main", "file"));
+    parser.addOption(logPathOption);
     parser.addHelpOption();
     parser.process(app);
 
     Monero::Utils::onStartup();
 
     // Log settings
-    Monero::Wallet::init(argv[0], "monero-wallet-gui");
-//    qInstallMessageHandler(messageHandler);
+    const QString logPath = getLogPath(parser.value(logPathOption));
+    Monero::Wallet::init(argv[0], "monero-wallet-gui", logPath.toStdString().c_str());
+    qInstallMessageHandler(messageHandler);
 
-    qDebug() << "app startd";
+
+    // loglevel is configured in main.qml. Anything lower than
+    // qWarning is not shown here.
+    qWarning().noquote() << "app startd" << "(log: " + logPath + ")";
 
     // screen settings
     // Mobile is designed on 128dpi
@@ -217,6 +220,8 @@ int main(int argc, char *argv[])
 
     engine.rootContext()->setContextProperty("qtRuntimeVersion", qVersion());
 
+    engine.rootContext()->setContextProperty("walletLogPath", logPath);
+
 // Exclude daemon manager from IOS
 #ifndef Q_OS_IOS
     const QStringList arguments = QCoreApplication::arguments();