mtest: refactor get_wrapper slightly

--wrapper and --gdb are mutually exclusive per run(), so make get_wrapper
reflect this (which would've saved me some time earlier with trying to
make the two work together for something else, when it turns out that's
impossible).

As suggested by Eli.

1 files changed, 4 insertions, 3 deletions

diff --git a/mesonbuild/mtest.py b/mesonbuild/mtest.py
index 541f8a317..4a907d89e 100644
--- a/mesonbuild/mtest.py
+++ b/mesonbuild/mtest.py
@@ -2064,15 +2064,16 @@ class TestHarness:
 
     @staticmethod
     def get_wrapper(options: argparse.Namespace) -> T.List[str]:
-        wrap: T.List[str] = []
         if options.gdb:
             wrap = [options.gdb_path, '--quiet']
             if options.repeat > 1:
                 wrap += ['-ex', 'run', '-ex', 'quit']
             # Signal the end of arguments to gdb
             wrap += ['--args']
-        if options.wrapper:
-            wrap += options.wrapper
+        elif options.wrapper:
+            wrap = options.wrapper
+        else:
+            wrap = []
         return wrap
 
     def get_pretty_suite(self, test: TestSerialisation) -> str: