qt: Allow checking if the sign/encrypt archive jobs are supported

* lang/qt/src/encryptarchivejob.cpp, lang/qt/src/encryptarchivejob.h
(isSupported): New.
* lang/qt/src/signarchivejob.cpp, lang/qt/src/signarchivejob.h
(isSupported): New.
* lang/qt/src/signencryptarchivejob.cpp,
lang/qt/src/signencryptarchivejob.h (isSupported): New.

* lang/qt/tests/run-encryptarchivejob.cpp (main),
lang/qt/tests/run-signarchivejob.cpp (main): Check if jobs are
supported.
--

GnuPG-bug-id: 6342

1 files changed, 6 insertions, 0 deletions

diff --git a/lang/qt/tests/run-encryptarchivejob.cpp b/lang/qt/tests/run-encryptarchivejob.cpp
index cdcfa17d..9ce79b6c 100644
--- a/lang/qt/tests/run-encryptarchivejob.cpp
+++ b/lang/qt/tests/run-encryptarchivejob.cpp
@@ -123,6 +123,12 @@ int main(int argc, char **argv)
 
     const auto options = parseCommandLine(app.arguments());
 
+    if ((options.sign && !QGpgME::SignEncryptArchiveJob::isSupported())
+        || (!options.sign && !QGpgME::EncryptArchiveJob::isSupported())) {
+        std::cerr << "Error: Encrypting archives is not supported by your version of gpg." << std::endl;
+        return 1;
+    }
+
     auto output = createOutput(options.archiveName);
     if (!output) {
         return 1;