1 files changed, 10 insertions, 0 deletions
diff --git a/mdbp/common.py b/mdbp/common.py
index 8b7f8c1..7a528bc 100644
--- a/mdbp/common.py
+++ b/mdbp/common.py
@@ -191,3 +191,13 @@ def clean_dir(directory: pathlib.Path, patterns: typing.List[str]) -> None:
         if not any(fnmatch.fnmatchcase(entry.name, pattern)
                    for pattern in patterns):
             entry.unlink()
+
+class AddSpaceSeparatedValues(argparse.Action):
+    """The action extends the destination array with the space-sparated parts
+    of the passed value."""
+    def __call__(self, parser: argparse.ArgumentParser,
+                 namespace: argparse.Namespace,
+                 values: typing.Union[str, typing.Sequence[typing.Any], None],
+                 option_string: typing.Optional[str] = None) -> None:
+        assert isinstance(values, str)
+        getattr(namespace, self.dest).extend(values.split())