create and reuse implementation for get-default-config notion

pypiper/manager.py

@@ -32,9 +32,9 @@
 from .exceptions import PipelineHalt, SubprocessError
 from .flags import *
 from .utils import \
-    check_shell, checkpoint_filepath, clear_flags, flag_name, \
-    is_multi_target, make_lock_name, pipeline_filepath, \
-    CHECKPOINT_SPECIFICATIONS, get_proc_name, parse_cmd
+    check_shell, checkpoint_filepath, clear_flags, default_pipeline_config, \
+    flag_name, get_proc_name, is_multi_target, make_lock_name, parse_cmd, \
+    pipeline_filepath, CHECKPOINT_SPECIFICATIONS
 from .const import PROFILE_COLNAMES
 from ._version import __version__
 import __main__
@@ -305,8 +305,7 @@ def __init__(
                     # print("\nUsing custom config file: {}".format(config_to_load))
             else:
                 # No custom config file specified. Check for default
-                pipe_path_base, _ = os.path.splitext(os.path.basename(sys.argv[0]))
-                default_config = "{}.yaml".format(pipe_path_base)
+                default_config = default_pipeline_config(sys.argv[0])
                 if os.path.isfile(default_config):
                     config_to_load = default_config
                     print("Using default pipeline config file: {}".

pypiper/utils.py

@@ -735,6 +735,16 @@ def _determine_args(argument_groups, arguments, use_all_args=False):
     return uniqify(final_args)
 
 
+def default_pipeline_config(pipeline_filepath):
+    """
+    Determine the default filepath for a pipeline's config file.
+
+    :param str pipeline_filepath: path to a pipeline
+    :return str: default filepath for pipeline's config file
+    """
+    return os.path.splitext(os.path.basename(pipeline_filepath))[0] + ".yaml"
+
+
 def _add_args(parser, args, required):
     """
     Add new arguments to an ArgumentParser.
@@ -749,10 +759,7 @@ def _add_args(parser, args, required):
 
     required = required or []
 
-    # Determine the default pipeline config file.
-    pipeline_script = os.path.basename(sys.argv[0])
-    default_config, _ = os.path.splitext(pipeline_script)
-    default_config += ".yaml"
+    default_config = default_pipeline_config(sys.argv[0])
 
     # Define the arguments.
     argument_data = {