added version number to meta info

CHANGELOG.rst

@@ -9,6 +9,10 @@ and this project adheres to `Semantic Versioning <https://semver.org/spec/v2.0.0
 Unreleased
 -------------
 
+Added
+~~~~~~
+- added version number to file metadata. If the native file format changes in the future.
+
 Changed
 ~~~~~~
 - using rosbags as ROS library. This avoids the conflicts of the test explorer and dependency on some poorly maintained libraries.

pointcloudset/io/dataset/dir.py

@@ -8,6 +8,7 @@
 import numpy as np
 import pandas as pd
 from rich import print
+import pointcloudset
 
 DATETIME_FORMAT = "%Y-%m-%d %H:%M:%S.%f"
 DELIMITER = ";"
@@ -40,6 +41,7 @@ def dataset_to_dir(
         timestamp.strftime(DATETIME_FORMAT) for timestamp in dataset_in.timestamps
     ]
     meta["empty_data"] = empty_data.to_dict()
+    meta["version"] = pointcloudset.__version__
     with open(folder.joinpath("meta.json"), "w") as outfile:
         json.dump(dataset_in.meta, outfile)
     _check_dir_contents(folder)

tests/unit/test_file_io_dataset.py

@@ -1,5 +1,6 @@
 from datetime import datetime
 from pathlib import Path
+import json
 
 import numpy as np
 import pandas as pd
@@ -170,6 +171,11 @@ def test_check_dir_file():
 def test_check_meta_file(testset: Dataset, tmp_path: Path):
     testfile_name = tmp_path.joinpath("dataset0")
     testset.to_file(testfile_name, use_orig_filename=False)
+    meta_in = json.loads(testfile_name.joinpath("meta.json").read_text())
+    check.equal(
+        list(meta_in.keys()),
+        ["orig_file", "topic", "timestamps", "empty_data", "version"],
+    )
     testfile_name.joinpath("meta.json").unlink()
     with pytest.raises(AssertionError):
         dir._check_dir_contents_single(testfile_name)