Pull version information from Git tags.

4 files changed, 23 insertions, 2 deletions

diff --git a/.gitignore b/.gitignore
index 66dbf51..a57e710 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,11 @@
+# Generated metadata created by `pip install`, `setup.py sdist`, and friends.
+# Will be reconstituted from setup.py as needed.
 *.egg-info
+
+# Compiled Python bytecode. Will be regenerated on import, for the current
+# Python version.
 *.pyc
+
+# Dependencies installed via setup_requires; will be recreated from setuptools
+# as needed.
+/.eggs/
diff --git a/envdir/__init__.py b/envdir/__init__.py
index e69de29..a7b85bd 100644
--- a/envdir/__init__.py
+++ b/envdir/__init__.py
@@ -0,0 +1,7 @@
+from importlib.metadata import version, PackageNotFoundError
+
+try:
+    __version__ = version("envdir-helper")
+except PackageNotFoundError:
+    # package is not installed
+    pass
diff --git a/envdir/cli.py b/envdir/cli.py
index 9f9db15..3eea246 100644
--- a/envdir/cli.py
+++ b/envdir/cli.py
@@ -9,6 +9,7 @@ import subprocess as sp
 
 @click.command()
 @click.pass_context
+@click.version_option()
 @click.argument(
     "envdir",
     default=pathlib.Path.home() / ".envdir",
diff --git a/setup.py b/setup.py
index 0d4c69a..8b2b5af 100644
--- a/setup.py
+++ b/setup.py
@@ -2,13 +2,17 @@ from setuptools import setup, find_packages
 
 setup(
     name="envdir-helper",
-    version="0.0.0",
+    use_scm_version=True,
 
     author="Owen Jacobson",
     author_email="owen@grimoire.ca",
-    
+
     packages=find_packages(),
 
+    setup_requires=[
+        "setuptools_scm ~= 4.1",
+    ],
+
     install_requires=[
         "click ~= 7.1.0",
     ],