[BUG] config fails when root_data is not defined

[ElineOppersma]

✨ Feature Description

The config fails on Mac OSx system

📈 Motivation

To enable Apple users to use resurfemg efficiently

🧩 Proposed Solution

Fix bug

🔍 Alternatives Considered

n/a

📚 Additional Context

see error log below

✅ Checklist

• I’ve checked that this feature isn’t already requested or implemented
• I’ve read the contributing guidelines
• I’m willing to help implement this feature if needed

Error log:

AttributeError Traceback (most recent call last)
Cell In[2], line 4
1 # Identify all recordings available for the selected patient/measurement_date
2
3 # First find the patients
----> 4 config = Config()
6 # Then find the files for the selected patients:
7 base_path = config.get_directory('_data')

File /./.venv_py314/lib/python3.14/site-packages/resurfemg/data_connector/config.py:119, in Config.init(self, location, verbose, force)
105 self.default_locations = (
106 './config.json',
107 os.path.expanduser('/.resurfemg/config.json'),
108 '/etc/resurfemg/config.json',
109 os.path.join(self.repo_root, 'config.json'),
110 )
111 self.default_layout = {
112 'root_data': '{}/not_pushed',
113 'test_data': test_data_path,
(...) 117 'output_data': '{}/output',
118 }
--> 119 self.load(location, verbose=verbose)
120 self.validate()

File ~/./.venv_py314/lib/python3.14/site-packages/resurfemg/data_connector/config.py:226, in Config.load(self, location, verbose)
224 if isinstance(root, str) and root.startswith('.'):
225 root = root.replace('.', config_path, 1)
--> 226 root = convert_to_os_path(root)
227 self._loaded['root_data'] = root
228 if root is None:

File ~/./.venv_py314/lib/python3.14/site-packages/resurfemg/data_connector/config.py:29, in convert_to_os_path(path)
20 def convert_to_os_path(
21 path: str,
22 ):
23 """
24 This function converts a path to a os readable path.
25 -----------------------------------------------------------------------
26 :param path: The path to convert.
27 :type path: str
28 """
---> 29 readable_path = path.replace(
30 os.sep if os.altsep is None else os.altsep, os.sep)
31 return readable_path

AttributeError: 'NoneType' object has no attribute 'replace'