tweak the pipeline

apps/cli/executables/pexable/null/null/null.py

@@ -17,6 +17,7 @@
 # along with Workspaces.  If not, see <https://www.gnu.org/licenses/>.
 
 import argparse
+import importlib.metadata
 import logging
 import os
 import random
@@ -136,6 +137,7 @@ def make_arg_parser() -> argparse.ArgumentParser:
         description=_DESCRIPTION.format(version),
         formatter_class=argparse.RawTextHelpFormatter,
     )
+    parser.add_argument("--version", action="version", version=importlib.metadata.version("ssa-null"))
     options = parser.add_argument_group("options", "settings for altering program behavior")
     options.add_argument(
         "-v",