Build system improvements

- Use setuptools_scm instead of versioneer

- Move the package into a "src" subdirectory which better
  follows best practices and ensures that running tests on
  the installed package does not do a relative import from
  the current working directory.

- Clean up deploy script to use pypi trusted publishing
  rather than twine.

Author: tskisner

.github/workflows/deploy.yml

@@ -3,25 +3,14 @@
 name:  Deploy Release
 
 on:
-  push:
-    tags:
-      - '*'
-
-# This is for debugging.
-# on:
-#   push:
-#     branches: [ master ]
-#   pull_request:
-#     branches: [ master ]
+  workflow_dispatch:
+  release:
+    types: [ published ]
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-env:
-  TWINE_USERNAME: __token__
-  TWINE_PASSWORD: ${{ secrets.TWINE_TOKEN }}
-
 jobs:
   wheels:
     runs-on: ubuntu-latest
@@ -35,7 +24,7 @@ jobs:
         python-version: "3.12"
 
     - name: Install Dependencies
-      run: python3 -m pip install build twine numpy
+      run: python3 -m pip install build numpy
 
     - name: Install Package
       run: python3 -m pip install .
@@ -49,6 +38,23 @@ jobs:
     - name: Build wheels
       run: python3 -m build --wheel
 
-    - name: Upload to PyPI
-      run: |
-        python -m twine upload dist/*.tar.gz && python -m twine upload dist/pshmem*.whl
+    - uses: actions/upload-artifact@v4
+        with:
+          name: pshmem
+          path: ./dist/pshmem*.whl
+
+  upload_pypi:
+    needs: wheels
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+    if: github.event_name == 'release' && github.event.action == 'published'
+    steps:
+      - uses: actions/download-artifact@v5
+        with:
+          # Unpacks all artifacts into dist/
+          pattern: pshmem-*
+          path: dist
+          merge-multiple: true
+
+      - uses: pypa/gh-action-pypi-publish@release/v1

.github/workflows/test.yml

@@ -89,17 +89,11 @@ jobs:
         run: |
           source ~/conda/etc/profile.d/conda.sh \
             && conda activate test \
-            && mkdir -p test \
-            && pushd test >/dev/null 2>&1 \
-            && MPI_DISABLE=1 python3 -c 'import pshmem.test; pshmem.test.run()' \
-            && popd >/dev/null 2>&1
+            && MPI_DISABLE=1 python3 -c 'import pshmem.test; pshmem.test.run()'
 
       - name: Run MPI Tests
         run: |
           source ~/conda/etc/profile.d/conda.sh \
             && conda activate test \
-            && mkdir -p test \
-            && pushd test >/dev/null 2>&1 \
             && mpirun -np 1 python3 -c 'import pshmem.test; pshmem.test.run()' \
-            && mpirun -np 2 python3 -c 'import pshmem.test; pshmem.test.run()' \
-            && popd >/dev/null 2>&1
+            && mpirun -np 2 python3 -c 'import pshmem.test; pshmem.test.run()'

.gitignore

@@ -1,3 +1,6 @@
+# Generated sources
+src/pshmem/_version.py
+
 # Python binary
 *__pycache__
 *.pyc