Set `pytest` log options in `contest.py` based on a custom command line flag

Question

I want to add a custom command-line flag to pytest which is responsible for setting multiple command-line options in conftest.py. (I don't want to set these options in pyproject.toml)

So basically, I want the following two commands too be equivalent

pytest -o log_cli=1 -o log_cli_level=10 -o log_format="%(message)s"

pytest --vmtrace

Now I have figured out how to register the --vmtrace option inside conftest.py as well as how I can access the value passed to it.

I am however, unable to figure out how to set the values of the log_cli log_cli_level and log_format options as required in the command above.

Here is what my conftest.py file currently looks like. Please suggest, what should replace the comments in the pytest_configure function.

def pytest_addoption(parser):
    parser.addoption("--vmtrace", dest='vmtrace', default=1, action='store_const', const=10, help="Run trace")


def pytest_configure(config):
    if config.getoption("vmtrace", default=1) == 10:
        # Set the log_cli option to 1
        # Set the log_cli_level option to 10
        # Set the log_format option to "%(message)s"

Answer 1

Finally figured this one out. Posting here in case someone else needs this.

The solution seems to me to be a bit hacky but it works. log_cli seems to be unavailable here but the other two parameters can be set. The log_cli parameter is set to True when the log_cli_level is set.

def pytest_configure(config):
    if config.getoption("vmtrace", default=1) == 10:
        config.option.__dict__["log_cli_level"] = "10"
        config.option.__dict__["log_format"] = "%(message)s"