core/qmlglobal: expose cacheDir

src/core/paths.cpp

@@ -51,6 +51,7 @@ QString QsPaths::ipcPath(const QString& id) {
 QDir* QsPaths::cacheDir() {
 	if (this->cacheState == DirState::Unknown) {
 		auto dir = QDir(QStandardPaths::writableLocation(QStandardPaths::CacheLocation));
+		dir = QDir(dir.filePath("by-shell"));
 		dir = QDir(dir.filePath(this->shellId));
 		this->mCacheDir = dir;
 

src/core/qmlglobal.cpp

@@ -21,6 +21,7 @@
 
 #include "generation.hpp"
 #include "iconimageprovider.hpp"
+#include "paths.hpp"
 #include "qmlscreen.hpp"
 #include "rootwrapper.hpp"
 
@@ -189,6 +190,14 @@ void QuickshellGlobal::setWatchFiles(bool watchFiles) { // NOLINT
 	QuickshellSettings::instance()->setWatchFiles(watchFiles);
 }
 
+QString QuickshellGlobal::cacheDir() const { // NOLINT
+	auto* dir = QsPaths::instance()->cacheDir();
+	if (dir) return dir->path();
+
+	qCritical() << "Could not find cache dir.";
+	return "/quickshell-cache-not-found";
+}
+
 QVariant QuickshellGlobal::env(const QString& variable) { // NOLINT
 	auto vstr = variable.toStdString();
 	if (!qEnvironmentVariableIsSet(vstr.data())) return QVariant::fromValue(nullptr);

src/core/qmlglobal.hpp

@@ -108,6 +108,10 @@ class QuickshellGlobal: public QObject {
 	/// If true then the configuration will be reloaded whenever any files change.
 	/// Defaults to true.
 	Q_PROPERTY(bool watchFiles READ watchFiles WRITE setWatchFiles NOTIFY watchFilesChanged);
+	/// The per-shell cache directory.
+	///
+	/// Usually `~/.cache/quickshell/by-shell/<shell-id>`
+	Q_PROPERTY(QString cacheDir READ cacheDir CONSTANT);
 	// clang-format on
 	QML_SINGLETON;
 	QML_NAMED_ELEMENT(Quickshell);
@@ -152,6 +156,8 @@ public:
 	[[nodiscard]] bool watchFiles() const;
 	void setWatchFiles(bool watchFiles);
 
+	[[nodiscard]] QString cacheDir() const;
+
 	static QuickshellGlobal* create(QQmlEngine* engine, QJSEngine* /*unused*/);
 
 signals: