Merge pull request #142 from oesteban/fix/n-procs

FIX: Honor ``--nprocs`` flag

Author: oesteban

dmriprep/cli/parser.py

@@ -439,7 +439,7 @@ def parse_args(args=None, namespace=None):
             config.nipype.plugin = _plugin
             config.nipype.plugin_args = plugin_settings.get("plugin_args", {})
             config.nipype.nprocs = config.nipype.plugin_args.get(
-                "nprocs", config.nipype.nprocs
+                "n_procs", config.nipype.nprocs
             )
 
     # Resource management options

dmriprep/config/__init__.py

@@ -279,12 +279,17 @@ class nipype(_Config):
     @classmethod
     def get_plugin(cls):
         """Format a dictionary for Nipype consumption."""
+        nprocs = int(cls.nprocs)
+        if nprocs == 1:
+            cls.plugin = "Linear"
+            return {"plugin": "Linear"}
+
         out = {
             "plugin": cls.plugin,
             "plugin_args": cls.plugin_args,
         }
         if cls.plugin in ("MultiProc", "LegacyMultiProc"):
-            out["plugin_args"]["nprocs"] = int(cls.nprocs)
+            out["plugin_args"]["n_procs"] = int(cls.nprocs)
             if cls.memory_gb:
                 out["plugin_args"]["memory_gb"] = float(cls.memory_gb)
         return out