feat(cli): show dataset metadata for tag

renku/core/dataset/dataset.py

@@ -733,17 +733,30 @@ def update_datasets(
     return imported_datasets_view_models, dataset_files_view_models
 
 
-def show_dataset(name):
+def show_dataset(name: str, tag: Optional[str] = None):
     """Show detailed dataset information.
 
     Args:
-        name: Name of dataset to show details for.
+        name(str): Name of dataset to show details for.
+        tag(str, optional): Tags for which to get the metadata (Default value = None).
 
     Returns:
         dict: JSON dictionary of dataset details.
     """
-    dataset = DatasetsProvenance().get_by_name(name, strict=True)
+    datasets_provenance = DatasetsProvenance()
+    dataset = datasets_provenance.get_by_name(name, strict=True)
+
+    if tag is None:
+        return DatasetDetailsJson().dump(dataset)
+
+    tags = datasets_provenance.get_all_tags(dataset=cast(Dataset, dataset))
+
+    selected_tag = next((t for t in tags if t.name == tag), None)
+
+    if selected_tag is None:
+        raise errors.DatasetTagNotFound(tag)
 
+    dataset = datasets_provenance.get_by_id(selected_tag.dataset_id.value)
     return DatasetDetailsJson().dump(dataset)
 
 

renku/core/errors.py

@@ -270,6 +270,14 @@ def __init__(self, *, name=None, message=None):
         super().__init__(msg)
 
 
+class DatasetTagNotFound(RenkuException):
+    """Raise when a tag can't be found."""
+
+    def __init__(self, tag) -> None:
+        msg = f"Couldn't find dataset tag '{tag}'."
+        super().__init__(msg)
+
+
 class ExternalFileNotFound(RenkuException):
     """Raise when an external file is not found."""
 

renku/ui/cli/dataset.py

@@ -133,6 +133,8 @@
     Description:
     Just some dataset
 
+You can also show details for a specific tag using the ``--tag`` option.
+
 Deleting a dataset:
 
 .. code-block:: console
@@ -681,13 +683,14 @@ def edit(name, title, description, creators, metadata, keyword):
 
 
 @dataset.command("show")
+@click.option("-t", "--tag", default=None, type=click.STRING, help="Tag for which to show dataset metadata.")
 @click.argument("name", shell_complete=_complete_datasets)
-def show(name):
+def show(tag, name):
     """Show metadata of a dataset."""
     from renku.command.dataset import show_dataset_command
     from renku.ui.cli.utils.terminal import print_markdown
 
-    result = show_dataset_command().build().execute(name=name)
+    result = show_dataset_command().build().execute(name=name, tag=tag)
     ds = result.output
 
     click.echo(click.style("Name: ", bold=True, fg=color.MAGENTA) + click.style(ds["name"], bold=True))

tests/cli/test_datasets.py

@@ -128,6 +128,69 @@ def test_dataset_show(runner, client, subdirectory):
     assert "##" not in result.output
 
 
+def test_dataset_show_tag(runner, client, subdirectory):
+    """Test creating and showing a dataset with metadata."""
+    result = runner.invoke(cli, ["dataset", "show", "my-dataset"])
+    assert 1 == result.exit_code, format_result_exception(result)
+    assert 'Dataset "my-dataset" is not found.' in result.output
+
+    metadata = {
+        "@id": "https://example.com/annotation1",
+        "@type": "https://schema.org/specialType",
+        "https://schema.org/specialProperty": "some_unique_value",
+    }
+    metadata_path = client.path / "metadata.json"
+    metadata_path.write_text(json.dumps(metadata))
+
+    result = runner.invoke(
+        cli,
+        [
+            "dataset",
+            "create",
+            "my-dataset",
+            "--title",
+            "Long Title",
+            "--description",
+            "description1",
+        ],
+    )
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "OK" in result.output
+
+    result = runner.invoke(cli, ["dataset", "tag", "my-dataset", "tag1"])
+    assert 0 == result.exit_code, format_result_exception(result)
+
+    result = runner.invoke(cli, ["dataset", "edit", "-d", "description2", "my-dataset"])
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "Successfully updated: description" in result.output
+
+    result = runner.invoke(cli, ["dataset", "tag", "my-dataset", "tag2"])
+    assert 0 == result.exit_code, format_result_exception(result)
+
+    result = runner.invoke(cli, ["dataset", "edit", "-d", "description3", "my-dataset"])
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "Successfully updated: description" in result.output
+
+    result = runner.invoke(cli, ["dataset", "tag", "my-dataset", "tag3"])
+    assert 0 == result.exit_code, format_result_exception(result)
+
+    result = runner.invoke(cli, ["dataset", "show", "my-dataset"])
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "description3" in result.output
+
+    result = runner.invoke(cli, ["dataset", "show", "--tag", "tag3", "my-dataset"])
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "description3" in result.output
+
+    result = runner.invoke(cli, ["dataset", "show", "--tag", "tag2", "my-dataset"])
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "description2" in result.output
+
+    result = runner.invoke(cli, ["dataset", "show", "--tag", "tag1", "my-dataset"])
+    assert 0 == result.exit_code, format_result_exception(result)
+    assert "description1" in result.output
+
+
 def test_datasets_create_different_names(runner, client):
     """Test creating datasets with same title but different name."""
     result = runner.invoke(cli, ["dataset", "create", "dataset-1", "--title", "title"])