Add version flag to CLI

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "gocam"
-version = "0.1.0"
+version = "0.0.0"
 description = "GO CAM Data Model (Python)"
 authors = ["The Gene Ontology Consortium <[email protected]>"]
 license = "BSD-3"

src/gocam/__init__.py

@@ -0,0 +1 @@
+from gocam._version import __version__

src/gocam/_version.py

@@ -1,7 +1,7 @@
 from importlib.metadata import version, PackageNotFoundError
 
 try:
-    __version__ = version(__name__)
+    __version__ = version(__package__)
 except PackageNotFoundError:
     # package not installed
     __version__ = "0.0.0"

src/gocam/cli.py

@@ -5,6 +5,7 @@
 import click
 import yaml
 
+from gocam import __version__
 from gocam.translation import MinervaWrapper
 
 
@@ -17,6 +18,7 @@
     show_default=True,
     help="If set then show full stacktrace on error",
 )
+@click.version_option(__version__)
 def cli(verbose: int, quiet: bool, stacktrace: bool):
     """A CLI for interacting with GO-CAMs."""
     if not stacktrace:

tests/test_cli.py

@@ -4,7 +4,8 @@
 import yaml
 from click.testing import CliRunner
 
-from gocam.cli import fetch
+from gocam import __version__
+from gocam.cli import fetch, cli
 from tests import INPUT_DIR
 
 
@@ -37,3 +38,9 @@ def test_fetch_json(runner, api_mock):
 
     parsed_output = json.loads(result.output)
     assert parsed_output["id"] == "gomodel:5b91dbd100002057"
+
+
+def test_version(runner):
+    result = runner.invoke(cli, ["--version"])
+    assert result.exit_code == 0
+    assert __version__ in result.output