Bump cibuildwheel version and add pip option

cibuildwheel 2.3 upgraded the version of pip it uses, but that version
altered how symlinks were handled on Windows. Specifying this
environment variable should restore the behaviour for now. It'll be
deprecated eventually though so we will need to do something else
long term.

Author: AlexanderWells-diamond

.github/workflows/code.yml

@@ -72,7 +72,7 @@ jobs:
 
       - name: Install Python Dependencies
         # Pin cibuildwheel due to https://github.com/pypa/cibuildwheel/issues/962
-        run: pip install build cibuildwheel==2.2.2
+        run: pip install build cibuildwheel>=2.3.1
 
       - name: Build Sdist
         if: matrix.sdist
@@ -111,7 +111,7 @@ jobs:
           path: dist/pytest-results.xml
 
   publish-test-results:
-    name: "Publish Unit Tests Results"
+    name: Publish Unit Tests Results
     needs: build
     runs-on: ubuntu-latest
     if: always()

setup.cfg

@@ -64,3 +64,12 @@ addopts =
 [coverage:run]
 # This is covered in the versiongit test suite so exclude it here
 omit = */_version_git.py
+
+# cibuildwheel 2.3.0 upgraded to pip v21.3, which no longer completely copies the
+# source directory before building, so the symlink'd "iocStatsDb" folder isn't included
+# in built wheels. This is a temporary fix for that, until pip drops support for this option.
+# The long term fix is to revamp how we include the iocStatsDb folder.
+# https://github.com/pypa/cibuildwheel/issues/962
+# https://github.com/pypa/pip/issues/7555
+[tool.cibuildwheel.environment]
+PIP_USE_DEPRECATED = "out-of-tree-build"