Pass --dds-exe through to mkrepo in tests

tests/conftest.py

 
 
 @pytest.fixture(scope='session')
-def dds_exe() -> Path:
-    return Path(__file__).absolute().parent.parent / '_build/dds'
+def dds_exe(pytestconfig) -> Path:
+    return Path(pytestconfig.getoption('--dds-exe'))
 
 
 @pytest.yield_fixture(scope='session')
 
 
 def pytest_addoption(parser):
-    parser.addoption(
-        '--test-deps', action='store_true', default=False, help='Run the exhaustive and intensive dds-deps tests')
+    parser.addoption('--test-deps',
+                     action='store_true',
+                     default=False,
+                     help='Run the exhaustive and intensive dds-deps tests')
+    parser.addoption('--dds-exe', help='Path to the dds executable under test', required=True, type=Path)
 
 
 def pytest_configure(config):

tests/http.py

         subprocess.check_call([
             sys.executable,
             str(Path.cwd() / 'tools/mkrepo.py'),
+            f'--dds-exe={self.dds_exe}',
             f'--dir={self.server.root}',
             f'--spec={fpath}',
         ])