Added separate distinction code for prereleases

- Releases will bei uploaded to PyPi Test and Prod
- Prereleases will only be uploaded to PyPi Test

Author: joergschultzelutter

publish-to-pypi.yml

@@ -43,10 +43,16 @@
 
 name: Upload Python Package 
 
+# Note: This job will be triggered for both releases and prereleases
+# Releases will be pushed to both PyPi Test AND Prod whereas
+# prereleases will only be pushed to PyPi Test
+# Github Actions offers only ONE trigger for releases, meaning that
+# the decision on to which site will be uploaded to will be made at
+# the respective sub branch.
+
 on:
   release:
     types: [published]
-#  push:
 
 # 
 # Configuration section - change values if necessary
@@ -75,7 +81,7 @@ jobs:
   # new release. Check if Github release version is equal to the one
   # extracted from the Python file. Ultimately, forward version information
   # to next Github Actions job in line.
-  update-version:
+  get-python-version-info:
     runs-on: ubuntu-latest
 
     # Output which is passed to the PyPi publication job
@@ -147,7 +153,7 @@ jobs:
   #
   deploy-to-pypi:
     runs-on: ubuntu-latest
-    needs: update-version
+    needs: get-python-version-info
 
     steps:
 
@@ -166,21 +172,19 @@ jobs:
     # Build the package. The export MUST be part of THIS step
     # Otherwise, the Python setup job will not see this information
     - name: Build package
-      run: export GITHUB_PROGRAM_VERSION='${{ needs.update-version.outputs.my-program-version }}';python -m build
+      run: export GITHUB_PROGRAM_VERSION='${{ needs.get-python-version-info.outputs.my-program-version }}';python -m build
     # Publish everything to Test PyPi
+    # Unlike for the Prod branch, we will push both releases and prerelease to PyPi Test
     - name: Publish package to Test PyPi
+      if: github.event_name == 'release' && startsWith(github.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__
         password: ${{ secrets.TEST_PYPI_API_TOKEN }}
         repository_url: https://test.pypi.org/legacy/
-    # Publish everything to Prod PyPi
-    # If you use job action 'on -> release -> types[published]' at the 
-    # beginning of this file, then the 'if' statement is not really 
-    # necessary. I'll keep this one as safeguard for testing in 
-    # case this Github action  is triggered via 'on -> push'
+    # Publish everything to Prod PyPi but only if it is not a prerelease
     - name: Publish package to Prod PyPi
-      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      if: github.event_name == 'release' && startsWith(github.ref, 'refs/tags') && !github.event.release.prerelease
       uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__