Load package + version, datetime of analysis into metadata

src/diffpy/labpdfproc/tests/test_tools.py

@@ -2,11 +2,14 @@
 import re
 from pathlib import Path
 
+import freezegun
 import pytest
 
 from diffpy.labpdfproc.labpdfprocapp import get_args
 from diffpy.labpdfproc.tools import (
     known_sources,
+    load_datetime,
+    load_package_version,
     load_user_metadata,
     set_input_lists,
     set_output_directory,
@@ -241,3 +244,25 @@ def test_load_user_metadata_bad(inputs, msg):
     actual_args = get_args(cli_inputs)
     with pytest.raises(ValueError, match=msg[0]):
         actual_args = load_user_metadata(actual_args)
+
+
+params7 = [(["2.5", "data.xy"], {"package_version": "0.1.0"})]
+
+
+@pytest.mark.parametrize("inputs, expected", params7)
+def test_load_package_version(inputs, expected, monkeypatch):
+    monkeypatch.setattr("importlib.metadata.version", lambda _: expected["package_version"])
+    actual_inputs = get_args(inputs)
+    actual_args = load_package_version(actual_inputs)
+    assert actual_args.package_version == expected["package_version"]
+
+
+params8 = [(["2.5", "data.xy"], ["2024-05-21 17:18:19"])]
+
+
+@pytest.mark.parametrize("inputs, expected_time", params8)
+def test_load_datetime(inputs, expected_time):
+    with freezegun.freeze_time("2024-05-21 17:18:19"):
+        actual_inputs = get_args(inputs)
+        actual_args = load_datetime(actual_inputs)
+        assert actual_args.creation_time == expected_time

src/diffpy/labpdfproc/tools.py

@@ -1,5 +1,8 @@
+from datetime import datetime
 from pathlib import Path
 
+from pip._internal.metadata import importlib
+
 WAVELENGTHS = {"Mo": 0.71, "Ag": 0.59, "Cu": 1.54}
 known_sources = [key for key in WAVELENGTHS.keys()]
 
@@ -171,3 +174,39 @@ def load_user_metadata(args):
             setattr(args, key, value)
     delattr(args, "user_metadata")
     return args
+
+
+def load_package_version(args):
+    """
+    Load package version into the provided argparse Namespace.
+
+    Parameters
+    ----------
+    args argparse.Namespace
+        the arguments from the parser
+
+    Returns
+    -------
+    the updated argparse Namespace with package version inserted as key-value pairs
+    """
+    package_version = importlib.metadata.version("diffpy.labpdfproc")
+    setattr(args, "package_version", package_version)
+    return args
+
+
+def load_datetime(args):
+    """
+    Load datetime into the provided argparse Namespace.
+
+    Parameters
+    ----------
+    args argparse.Namespace
+        the arguments from the parser
+
+    Returns
+    -------
+    the updated argparse Namespace with datetime inserted as key-value pairs
+    """
+    curr_time = datetime.now()
+    setattr(args, "creation_time", curr_time)
+    return args