Add some logging to data_var determination

src/mhm_tools/common/xarray_utils.py

@@ -53,8 +53,10 @@ def get_single_data_var(ds):
     return data_vars[0]
 
 def induce_data_var_from_file_name(ds, file_path):
+    logger.info('Searching for more than one datavar by comparing with file name.')
     name = file_path.stem
     data_vars = list(ds.data_vars)
+    logger.debug(f'{name} - {data_vars}')
     for dv in data_vars: 
         if dv in name:
             return dv

src/mhm_tools/pre/crop_mhm_setup.py

@@ -90,6 +90,7 @@ def crop_file_with_header(ds_in, file_path, mask, output_path):
         if data_var is None:
             logger.error(f'File {file_path} could not be croped because the data_var could not be determined.')
             return None, None
+        logger.debug(f'Found data_var={data_var}')
     with header.open("r") as h:
         d = {}
         logger.debug(f"Reading out header.txt file {header}")