Wayland support and prevent Klipper from saving passwords:

- Use KSystemClipboard instead of QClipper to make krunner-pass work
    under wayland.
  - Specify the "x-kde-passwordManagerHint" mimetype when copying the
    password to the clipboard to prevent Klipper from storing the
    plaintext password in the history.

CMakeLists.txt

@@ -25,8 +25,8 @@ find_package (KF5 ${KF5_MIN_VERSION}
   Notifications
   Auth
   KCMUtils
+  GuiAddons
 )
-
 include(KDEInstallDirs)
 include(KDECMakeSettings)
 include(KDECompilerSettings NO_POLICY_SCOPE)
@@ -73,7 +73,8 @@ target_link_libraries(krunner_pass KF5::Runner Qt5::Widgets
                       KF5::Service
                       KF5::Plasma
                       KF5::ConfigWidgets
-                      KF5::Notifications)
+                      KF5::Notifications
+                      KF5::GuiAddons)
 
 add_dependencies(krunner_pass kcm_krunner_pass)
 

pass.cpp

@@ -26,6 +26,8 @@
 #include <QTimer>
 #include <QMessageBox>
 #include <QClipboard>
+#include <KSystemClipboard>
+#include <QMimeData>
 #include <QDebug>
 #include <QApplication>
 
@@ -185,10 +187,14 @@ void Pass::match(Plasma::RunnerContext &context)
 
 void Pass::clip(const QString &msg)
 {
-    QClipboard *cb = QApplication::clipboard();
-    cb->setText(msg);
-    QTimer::singleShot(timeout * 1000, cb, [cb]() {
-        cb->setText(QString());
+    auto md = new QMimeData;
+    auto kc = KSystemClipboard::instance();
+    // https://phabricator.kde.org/D12539
+    md->setText(msg);
+    md->setData(QStringLiteral("x-kde-passwordManagerHint"), "secret");
+    kc->setMimeData(md,QClipboard::Clipboard);
+    QTimer::singleShot(timeout * 1000, kc, [kc]() {
+        kc->clear(QClipboard::Clipboard);
     });
 }