BF: Don't create a sourcedata-dir just for a README; Check lexists for the actual file instead

Author: bpoldrack

heudiconv/bids.py

@@ -51,7 +51,7 @@ def populate_bids_templates(path, defaults={}):
                   ('DatasetDOI', 'TODO: eventually a DOI for the dataset')
         ]))
     sourcedata_README = op.join(path, 'sourcedata', 'README')
-    if not op.lexists(op.dirname(sourcedata_README)):
+    if op.exists(op.dirname(sourcedata_README)):
         create_file_if_missing(sourcedata_README,
             ("TODO: Provide description about source data, e.g. \n"
             "Directory below contains DICOMS compressed into tarballs per "

heudiconv/utils.py

@@ -110,7 +110,7 @@ def anonymize_sid(sid, anon_sid_cmd):
 def create_file_if_missing(filename, content):
     """Create file if missing, so we do not
     override any possibly introduced changes"""
-    if op.exists(filename):
+    if op.lexists(filename):
         return False
     dirname = op.dirname(filename)
     if not op.exists(dirname):