Deduce plugin paths from PATH

On NixOS, Qt plugins are not installed in a global location. Instead, we deduce the locations of installed plugins from the PATH environment variable.
ttuegel · Oct 15, 2017 · efad454 · efad454
1 parent 0e98ce3
commit efad454
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
@@ -2533,6 +2533,15 @@ QStringList QCoreApplication::libraryPaths()
         QStringList *app_libpaths = new QStringList;
         coreappdata()->app_libpaths.reset(app_libpaths);
 
+        // Add library paths derived from PATH
+        const QStringList paths = QFile::decodeName(qgetenv("PATH")).split(':');
+        const QString plugindir = QStringLiteral("../" NIXPKGS_QT_PLUGIN_PREFIX);
+        for (const QString &path: paths) {
+            if (!path.isEmpty()) {
+                app_libpaths->append(QDir::cleanPath(path + QDir::separator() + plugindir));
+            }
+        }
+
         const QByteArray libPathEnv = qgetenv("QT_PLUGIN_PATH");
         if (!libPathEnv.isEmpty()) {
             QStringList paths = QFile::decodeName(libPathEnv).split(QDir::listSeparator(), QString::SkipEmptyParts);