From ef922f2e099cf8556828f9559a154eedefd945f4 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Mon, 3 Jun 2019 11:30:36 +0200
Subject: Add --dump-config

---
 src/config.cpp | 22 ++++++++++++++++++++++
 src/config.h   |  3 ++-
 src/main.cpp   |  5 +++++
 3 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/config.cpp b/src/config.cpp
index 1689b00..d70b504 100644
--- a/src/config.cpp
+++ b/src/config.cpp
@@ -6,9 +6,11 @@
 #include <QCommandLineParser>
 #include <QSettings>
 #include <QDebug>
+#include <QList>
 
 static QCommandLineParser parser;
 static QSettings* configFile = nullptr;
+static QList<ConfigOption*> allOptions;
 
 static inline QStringList combine(const QString &a, const QString &b)
 {
@@ -34,6 +36,7 @@ struct ConfigOption
         if (!cmdLine.names().isEmpty()) {
             parser.addOption(cmdLine);
         }
+        allOptions.append(this);
     }
 };
 
@@ -62,6 +65,7 @@ const ConfigOption* const Config::LOCATION_MODE = new ConfigOption("", "location
 const ConfigOption* const Config::TEMPLATE_MODE = new ConfigOption("", "template-mode", "template-mode", "mode", "BUMP", "Whether to BUMP entries marked as template, or IGNORE the flag");
 const ConfigOption* const Config::AUTOSTART_UUID = new ConfigOption("", "start-uuid", "start-uuid", "uuid", "", "Immediately launch session with given uuid/name");
 const ConfigOption* const Config::NO_VTX = new ConfigOption("", "no-vtx", "no-vtx", "", "0", "Fade all VM sessions that would require VTX/SVM CPU capabilities");
+const ConfigOption* const Config::DUMP_CONFIG = new ConfigOption("", "dump-config", "", "", "", "Dump effective configuration (config file plus command line options) to stdout");
 
 
 QString Config::get(const ConfigOption* const option)
@@ -113,3 +117,21 @@ bool Config::init(const QCoreApplication& app, const ConfigOption* const configF
     return true;
 }
 
+void Config::dump()
+{
+    QTextStream ts(stdout);
+    for (ConfigOption *c : allOptions) {
+        if (c->iniKey.isEmpty()) // Not configurable by config
+            continue;
+        QString val = get(c);
+        if (c->withArgument) {
+            if (c->defaultValue.isEmpty() && val.isEmpty()) // Defaults to empty, current value is empty, skip
+                continue;
+            ts << c->iniKey << "=" << val << "\n";
+        } else {
+            if (!isSet(c)) // Bool argument not set, default would be false anyways, skip
+                continue;
+            ts << c->iniKey << "=true\n";
+        }
+    }
+}
diff --git a/src/config.h b/src/config.h
index 872836d..f1a20ea 100644
--- a/src/config.h
+++ b/src/config.h
@@ -2,7 +2,6 @@
 #define CONFIG_H
 
 #include <QCoreApplication>
-#include <QList>
 
 struct ConfigOption;
 
@@ -34,10 +33,12 @@ public:
     static const ConfigOption* const TEMPLATE_MODE;
     static const ConfigOption* const AUTOSTART_UUID;
     static const ConfigOption* const NO_VTX;
+    static const ConfigOption* const DUMP_CONFIG;
 
     static bool init(const QCoreApplication& app, const ConfigOption* const configFile);
     static QString get(const ConfigOption* const option);
     static bool isSet(const ConfigOption* const option);
+    static void dump();
 
 private:
     Config() {}
diff --git a/src/main.cpp b/src/main.cpp
index 3390101..4c0592f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -30,6 +30,11 @@ int main(int argc, char *argv[]) {
         return 1;
     }
 
+    if (Config::isSet(Config::DUMP_CONFIG)) {
+        Config::dump();
+        return 0;
+    }
+
     if (Config::isSet(Config::INSECURE)) {
         qDebug() << "Warning: Certificate validation disabled";
         QSslConfiguration sslConf = QSslConfiguration::defaultConfiguration();
-- 
cgit v1.2.3-55-g7522