pypi: fix cibuildwheel — drop macos-13, bundle quant.h before container build

Three failures from the first publish run:

  1. macos-13 runner is no longer supported by GitHub Actions
     ("configuration 'macos-13-us-default' is not supported"). Drop it;
     ship arm64 wheels via macos-14 only. Intel macOS users can install
     from sdist (which still works on Intel via local compile).

  2. Linux + Windows wheel builds failed in cibuildwheel's before-build:
     the python one-liner we used for header copy was awkward AND the
     more fundamental issue is that cibuildwheel mounts only package-dir
     into the manylinux container, so '../../quant.h' is unreachable
     from inside the build. Fix: stage quant.h into bindings/python/
     quantcpp/_quant.h via a regular GitHub Actions step BEFORE invoking
     cibuildwheel. The before-build hook now just verifies the file is
     present (clear error if not).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: unamedkr

.github/workflows/publish.yml

@@ -31,9 +31,7 @@ jobs:
             arch: x86_64
           - os: ubuntu-latest
             arch: aarch64
-          - os: macos-13      # Intel runner
-            arch: x86_64
-          - os: macos-14      # Apple Silicon runner
+          - os: macos-14      # Apple Silicon (M-series). Intel macs deferred.
             arch: arm64
           - os: windows-latest
             arch: AMD64
@@ -50,6 +48,14 @@ jobs:
         with:
           platforms: arm64
 
+      # cibuildwheel mounts only the package-dir into Linux build containers,
+      # so we must place quant.h INSIDE bindings/python/quantcpp/ before
+      # invoking it. setup.py refreshes from ../../quant.h in dev tree, but
+      # that path doesn't exist inside the manylinux container.
+      - name: Bundle quant.h into package
+        shell: bash
+        run: cp quant.h bindings/python/quantcpp/_quant.h
+
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.21.3
         with:

bindings/python/pyproject.toml

@@ -56,8 +56,9 @@ quantcpp = ["_quant.h", "*.so", "*.dylib", "*.dll"]
 build = "cp39-* cp310-* cp311-* cp312-* cp313-*"
 skip  = "*-musllinux_i686 *-manylinux_i686 pp*"
 
-# Verify the bundled header is in place before building
-before-build = "python -c \"import shutil, os; src='../../quant.h'; dst='quantcpp/_quant.h'; (os.path.exists(src) and shutil.copyfile(src, dst)) or (os.path.exists(dst) or (_ for _ in ()).throw(FileNotFoundError(dst)))\""
+# Verify the bundled header is present (CI step copies quant.h here before
+# this hook runs; setup.py also refreshes from ../../quant.h in dev tree).
+before-build = "python -c \"import os, sys; sys.exit(0 if os.path.exists('quantcpp/_quant.h') else (sys.stderr.write('quantcpp/_quant.h missing — bundle step did not run\\n') or 1))\""
 
 # Smoke-test the built wheel before publishing
 test-command = "python -c \"import quantcpp; print('quantcpp', quantcpp.__version__)\""