Override config, data and cache location

src/core/standardpaths.cpp

@@ -0,0 +1,82 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QtGlobal>
+#include <QString>
+#include <QDir>
+#include <QCoreApplication>
+
+#include "standardpaths.h"
+
+using namespace Qt::StringLiterals;
+
+void StandardPaths::AppendOrganizationAndApplication(QString &path) {
+
+  const QString organization_name = QCoreApplication::organizationName().toLower();
+  if (!organization_name.isEmpty()) {
+    path += u'/' + organization_name;
+  }
+  const QString application_name = QCoreApplication::applicationName().toLower();
+  if (!application_name.isEmpty()) {
+    path += u'/' + application_name;
+  }
+
+}
+
+QString StandardPaths::WritableLocation(const StandardLocation type) {
+
+#if defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)
+  switch (type) {
+    case CacheLocation:
+    case GenericCacheLocation:{
+      QString cache_location = qEnvironmentVariable("XDG_CACHE_HOME");
+      if (!cache_location.startsWith(u'/')) {
+        cache_location.clear();
+      }
+      if (cache_location.isEmpty()) {
+        cache_location = QDir::homePath() + "/.cache"_L1;
+      }
+      if (type == QStandardPaths::CacheLocation) {
+        AppendOrganizationAndApplication(cache_location);
+      }
+      return cache_location;
+    }
+    case AppDataLocation:
+    case AppLocalDataLocation:
+    case GenericDataLocation:{
+      QString data_location = qEnvironmentVariable("XDG_DATA_HOME");
+      if (!data_location.startsWith(u'/')) {
+        data_location.clear();
+      }
+      if (data_location.isEmpty()) {
+        data_location = QDir::homePath() + "/.local/share"_L1;
+      }
+      if (type == AppDataLocation || type == AppLocalDataLocation) {
+        AppendOrganizationAndApplication(data_location);
+      }
+      return data_location;
+    }
+    default:
+      break;
+  }
+#endif
+
+  return QStandardPaths::writableLocation(type);
+
+}