Use hatchling as build system

Signed-off-by: liamhuber <liamhuber@greyhavensolutions.com>

Author: liamhuber

.ci_support/environment.yml

@@ -6,14 +6,14 @@ dependencies:
 - cloudpickle =3.1.1
 - executorlib =1.7.1
 - graphviz =9.0.0
+- hatchling =1.27.0
+- hatch-vcs =0.5.0
 - pandas =2.3.2
 - pint =0.25
 - pyiron_snippets =0.2.0
 - python >=3.11,<3.14
 - python-graphviz =0.21
 - rdflib =7.1.4
 - semantikon =0.0.22
-- setuptools>=68
 - toposort =1.10
 - typeguard =4.4.4
-- wheel

.github/workflows/release.yml

@@ -2,7 +2,7 @@
 name: Release
 
 on:
-#  pull_request:
+  pull_request:
   release:
     types: [ published ]
 
@@ -13,4 +13,4 @@ jobs:
     with:
       semantic-upper-bound: 'minor'
       lower-bound-yaml: '.ci_support/lower_bound.yml'
-#      publish-to-pypi: false
+      publish-to-pypi: ${{ github.event_name == 'release' && github.event.action == 'published' }}

pyiron_workflow/__init__.py

@@ -22,9 +22,14 @@
     guided workflow design
 """
 
-from ._version import get_versions
+import importlib.metadata
 
-__version__ = get_versions()["version"]
+try:
+    # Installed package will find its version
+    __version__ = importlib.metadata.version(__name__)
+except importlib.metadata.PackageNotFoundError:
+    # Repository clones will register an unknown version
+    __version__ = "0.0.0+unknown"
 
 # User API