BUG Fix install with src layout (#506)

* Remove broken docs/examples/nodal_writer.py symlink

Wasn't used in docs as a downloadable file, so I don't think it's necessary

* Move serpentTools to src/serpentTools : fix installation

Closes #499

* Remove pythonpath hack from jupyter notebook testing

Author: drewejohnson

.github/workflows/testing.yaml

@@ -49,7 +49,6 @@ jobs:
         # installing. Should be removed with a src-layout
         # https://github.com/CORE-GATECH-GROUP/serpent-tools/issues/499
         run: |
-          export PYTHONPATH=${GITHUB_WORKSPACE}:${PYTHONPATH}
           cd examples
           jupyter execute *ipynb
 

MANIFEST.in

@@ -1,5 +1,3 @@
-include versioneer.py
-include serpentTools/_version.py
-include serpentTools/variables.yaml
-include serpentTools/data/*.m
-include serpentTools/data/*.coe
+include src/serpentTools/variables.yaml
+include src/serpentTools/data/*.m
+include src/serpentTools/data/*.coe

docs/examples/nodal_writer.py

@@ -50,7 +50,7 @@ serpentTools = ["variables.yaml"]
 "serpentTools.data" = ["*.m", "*.coe"]
 
 [tool.setuptools.packages.find]
-where = ["serpentTools"]
+where = ["src"]
 
 # This is okay to be empty, but we need a section here
 # in order to trigger it's usage when setting version data