Added --version flag and _version file writing, closes #67 (#69)

* Fixed version number, resolving #67

* Added a dastardly end quote

* Allowed alchemist to be run without a command

* Fixed cli version option

* Linting fix

* Fixed ImportError when alchemist is not installed

Co-authored-by: Matthew Alger <[email protected]>

.gitignore

@@ -111,3 +111,6 @@ venv.bak/
 .vscode/
 datacube-index/
 output
+
+# Let setuptools_scm manage the _version.py file
+datacube_alchemist/_version.py

datacube_alchemist/__init__.py

@@ -1,7 +1,4 @@
-from pkg_resources import get_distribution, DistributionNotFound
-
 try:
-    __version__ = get_distribution(__name__).version
-except DistributionNotFound:
-    # package is not installed
-    __version__ = "package-not-installed"
+    from ._version import version as __version__
+except ImportError:
+    __version__ = "Unknown/Not Installed"

datacube_alchemist/cli.py

@@ -6,6 +6,7 @@
 from datacube.ui import click as ui
 
 from datacube_alchemist._utils import _configure_logger
+from datacube_alchemist import __version__
 import structlog
 
 from odc.aws.queue import get_queue
@@ -66,11 +67,15 @@ def cli_with_envvar_handling():
     cli(auto_envvar_prefix="ALCHEMIST")
 
 
-@click.group(context_settings=dict(max_content_width=120))
-def cli():
+@click.group(context_settings=dict(max_content_width=120), invoke_without_command=True)
+@click.option("--version", is_flag=True, default=False)
+def cli(version):
     """
     Transform Datasets from the Open Data Cube into a new type of Dataset
     """
+    if version:
+        click.echo(__version__)
+
     # Set up opinionated logging
     _configure_logger()
 

pyproject.toml

@@ -0,0 +1,5 @@
+[build-system]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
+
+[tool.setuptools_scm]
+write_to = "datacube_alchemist/_version.py"