fix json loading

Author: bpinsard

fmriprep/cli/run.py

@@ -82,7 +82,7 @@ def get_parser():
     # Re-enable when option is actually implemented
     # g_bids.add_argument('-r', '--run-id', action='store', default='single_run',
     #                     help='select a specific run to be processed')
-    g_bids.add_argument('bids_filters', action='store', type=Path,
+    g_bids.add_argument('--bids_filters', action='store', type=Path,
                         help='the path to a JSON file describing custom BIDS input filter')
     g_bids.add_argument('-t', '--task-id', action='store',
                         help='select a specific task to be processed')
@@ -527,7 +527,7 @@ def build_workflow(opts, retval):
     output_dir = opts.output_dir.resolve()
     work_dir = opts.work_dir.resolve()
     bids_filters_file = opts.bids_filters.resolve()
-    bids_filters = json.load(bids_filters_file) if bids_filters_file else Undefined
+    bids_filters = json.load(open(bids_filters_file)) if bids_filters_file else Undefined
 
     retval['return_code'] = 1
     retval['workflow'] = None