Switch project to dynamic version based on Git commits

.gitignore

@@ -1,3 +1,4 @@
 __pycache__/
 dist/
+src/pogo_scaled_estimators/_version.py
 *.sqlite

pyproject.toml

@@ -1,10 +1,10 @@
 [build-system]
-requires = ["hatchling"]
+requires = ["hatchling", "hatch-vcs"]
 build-backend = "hatchling.build"
 
 [project]
 name = "pogo-scaled-estimators"
-version = "1.0a1"
+dynamic = ["version"]
 dependencies = [
   "requests",
   "requests-cache",
@@ -32,6 +32,12 @@ classifiers = [
 [project.scripts]
 ase-cli = "pogo_scaled_estimators:main_cli"
 
+[tool.hatch.version]
+source = "vcs"
+
+[tool.hatch.build.hooks.vcs]
+version-file = "src/pogo_scaled_estimators/_version.py"
+
 [tool.hatch.envs.lint]
 detached = true
 dependencies = [

src/pogo_scaled_estimators/cli.py

@@ -9,6 +9,7 @@ import operator
 import sys
 from functools import reduce
 
+from pogo_scaled_estimators._version import version
 from pogo_scaled_estimators.calculator import Calculator, Filter
 
 
@@ -23,6 +24,7 @@ def main_cli():
     _ = parser.add_argument(
         "--no-legendary", dest="filters", action="append_const", const=Filter.DISALLOW_LEGENDARY_POKEMON
         )
+    _ = parser.add_argument("--version", action="version", version=version)
 
     args = parser.parse_args()
     filters = reduce(operator.or_, args.filters or [], Filter.NO_FILTER)