core: add per-config shell id

Will be useful for future functionality such as IPC and caching.

src/core/main.cpp

@@ -5,6 +5,7 @@
 #include <qcommandlineoption.h>
 #include <qcommandlineparser.h>
 #include <qcoreapplication.h>
+#include <qcryptographichash.h>
 #include <qdir.h>
 #include <qfileinfo.h>
 #include <qguiapplication.h>
@@ -31,10 +32,12 @@ int qs_main(int argc, char** argv) {
 	auto useQApplication = false;
 	auto nativeTextRendering = false;
 	auto desktopSettingsAware = true;
+	auto shellId = QString();
 	QHash<QString, QString> envOverrides;
 
 	int debugPort = -1;
 	bool waitForDebug = false;
+	bool printCurrent = false;
 
 	{
 		const auto app = QCoreApplication(argc, argv);
@@ -85,7 +88,7 @@ int qs_main(int argc, char** argv) {
 		}
 
 		{
-			auto printCurrent = parser.isSet(currentOption);
+			printCurrent = parser.isSet(currentOption);
 
 			// NOLINTBEGIN
 #define CHECK(rname, name, level, label, expr)                                                     \
@@ -274,9 +277,9 @@ int qs_main(int argc, char** argv) {
 #undef CHECK
 #undef OPTSTR
 
-			qInfo() << "config file path:" << configFilePath;
+			shellId = QCryptographicHash::hash(configFilePath.toUtf8(), QCryptographicHash::Md5).toHex();
 
-			if (printCurrent) return 0;
+			qInfo() << "config file path:" << configFilePath;
 		}
 
 		if (!QFile(configFilePath).exists()) {
@@ -315,6 +318,8 @@ int qs_main(int argc, char** argv) {
 					auto var = envPragma.sliced(0, splitIdx).trimmed();
 					auto val = envPragma.sliced(splitIdx + 1).trimmed();
 					envOverrides.insert(var, val);
+				} else if (pragma.startsWith("ShellId ")) {
+					shellId = pragma.sliced(8).trimmed();
 				} else {
 					qCritical() << "Unrecognized pragma" << pragma;
 					return -1;
@@ -325,6 +330,12 @@ int qs_main(int argc, char** argv) {
 		file.close();
 	}
 
+
+	if (printCurrent) {
+		qInfo() << "shell id:" << shellId;
+		return 0;
+	}
+
 	for (auto [var, val]: envOverrides.asKeyValueRange()) {
 		qputenv(var.toUtf8(), val.toUtf8());
 	}
@@ -396,7 +407,7 @@ int qs_main(int argc, char** argv) {
 		QQuickWindow::setTextRenderType(QQuickWindow::NativeTextRendering);
 	}
 
-	auto root = RootWrapper(configFilePath);
+	auto root = RootWrapper(configFilePath, shellId);
 	QGuiApplication::setQuitOnLastWindowClosed(false);
 
 	auto code = QGuiApplication::exec();

src/core/rootwrapper.cpp

@@ -16,10 +16,11 @@
 #include "scan.hpp"
 #include "shell.hpp"
 
-RootWrapper::RootWrapper(QString rootPath)
-    : QObject(nullptr)
-    , rootPath(std::move(rootPath))
-    , originalWorkingDirectory(QDir::current().absolutePath()) {
+RootWrapper::RootWrapper(QString rootPath, QString shellId)
+		: QObject(nullptr)
+		, rootPath(std::move(rootPath))
+		, shellId(std::move(shellId))
+		, originalWorkingDirectory(QDir::current().absolutePath()) {
 	// clang-format off
 	QObject::connect(QuickshellSettings::instance(), &QuickshellSettings::watchFilesChanged, this, &RootWrapper::onWatchFilesChanged);
 	// clang-format on

src/core/rootwrapper.hpp

@@ -12,7 +12,7 @@ class RootWrapper: public QObject {
 	Q_OBJECT;
 
 public:
-	explicit RootWrapper(QString rootPath);
+	explicit RootWrapper(QString rootPath, QString shellId);
 	~RootWrapper() override;
 	Q_DISABLE_COPY_MOVE(RootWrapper);
 
@@ -24,6 +24,7 @@ private slots:
 
 private:
 	QString rootPath;
+	QString shellId;
 	EngineGeneration* generation = nullptr;
 	QString originalWorkingDirectory;
 };