option to fail if config not exists

[genu]

Environment

Node v22.5.1

Reproduction

    const { config } = await loadConfig({ configFile: 'THIS_FILE_DOESNT_EXIST.ts' })

    console.log('loaded config: ', config)

Describe the bug

When loading a config, there isn't a way, as far as I can tell to know whether the config file was loaded or not:

The config file doesn't exist, nor does loadConfig raise an error about it. I would think that there should be a guarantee that the config was loaded after calling loadConfig or indicate that the config file failed to load.

Additional context

No response

Logs

[pi0]

Thanks for issue. This is default expected behavior that c12 optionally loads user config.

Feel free to open a PR to add a loader option to fail in case of failure.

(alternatively you can check existence of returned configFile yourself.