feat: add wf/usecase for user-customized python envs

packages/wf-custom-python/package.py

+# Copyright 2013-2024 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class WfCustomPython(BundlePackage):
+    """Meta-package to represent a use case where users install additional
+    (on top of the ESD) Python packages."""
+
+    version("0.1")
+    
+    depends_on("py-pip")
+    depends_on("py-virtualenv")

spack.yaml

@@ -65,6 +65,7 @@ spack:
     - wf-protein-association-rates@0.1
     - wf-multi-area-model@1.1.1
     - wf-uq-akar4@0.1
+    - wf-custom-python@0.1
     #- py-cerebstats
     #- py-cerebunit
     #- py-morphounit@1.0.4