Bug: properties command fails when dbt issues warning

[ciklista]

Problem:

dbt-invoke properties raises json.decoder.JSONDecodeError: Extra data: line 1 column 2 (char 1) when dbt ls --output json issues a warning like

08:04:21  [WARNING]: Deprecated functionality
The `source-paths` config has been renamed to `model-paths`. Please update your
`dbt_project.yml` configuration to reflect this change.
{"resource_type": "model", "depends_on": {"macros": [], ...
...

The issue is in the parsing of the dbt ls parsing (https://github.com/Dashlane/dbt-invoke/blob/main/dbt_invoke/internal/_utils.py#L171) which will fail if not all the output is valid json.

I assume that this might not be the only place where dbt json output is being parsed but I haven't had the time to investigate further yet. I think dbt will raise the warning on most (if not all) dbt commands.

Proposed solution
Imho I think that warnings should be passed onto the output of dbt-invoke properties but should not cause the command to fail.

[robastel]

I plan on taking a further look into this and potentially working on a solution in the coming days.