fix(variants): correct variant generation: stop generation as soon as…

… a command fails

antarest/study/storage/variantstudy/variant_command_generator.py

@@ -81,6 +81,11 @@ def _generate(
             cmd_notifier.index = index
             stopwatch.log_elapsed(cmd_notifier)
 
+            # stop variant generation as soon as a command fails
+            if not output.status:
+                logger.error(f"Command {cmd.command_name} failed: {output.message}")
+                break
+
         results.success = all(detail["status"] for detail in results.details)  # type: ignore
 
         data_type = isinstance(data, FileStudy)

tests/integration/test_integration_variantmanager_tool.py

@@ -49,8 +49,8 @@ def generate_study_with_server(
         f"/v1/studies/{base_study_id}/variants?name={urllib.parse.quote_plus(name)}",
         headers={"Authorization": f'Bearer {admin_credentials["access_token"]}'},
     )
+    assert res.status_code == 200, res.json()
     variant_id = res.json()
-    assert res.status_code == 200
     generator = RemoteVariantGenerator(variant_id, session=client, token=admin_credentials["access_token"])
     return generator.apply_commands(commands, matrices_dir), variant_id