py: add sdist packaging scripts

tools/cufinufft/build-sdist.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e -x
+
+# Move pyproject.toml to root (otherwise no way to include C++ sources in sdist).
+mv finufft/python/cufinufft/pyproject.toml finufft/
+
+# Fix paths in pyproject.toml to reflect the new directory structure.
+toml set --toml-path finufft/pyproject.toml \
+         tool.scikit-build.cmake.source-dir "."
+toml set --toml-path finufft/pyproject.toml \
+         tool.scikit-build.wheel.packages --to-array "[\"python/cufinufft/cufinufft\"]"
+toml set --toml-path finufft/pyproject.toml \
+         tool.scikit-build.metadata.version.input "python/cufinufft/cufinufft/__init__.py"
+
+# Package the sdist.
+python3 -m build --verbose --sdist --outdir wheelhouse finufft

tools/finufft/build-sdist.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -e -x
+
+# Move pyproject.toml to root (otherwise no way to include C++ sources in sdist).
+mv finufft/python/finufft/pyproject.toml finufft/
+
+# Fix paths in pyproject.toml to reflect the new directory structure.
+toml set --toml-path finufft/pyproject.toml \
+         tool.scikit-build.cmake.source-dir "."
+toml set --toml-path finufft/pyproject.toml \
+         tool.scikit-build.wheel.packages --to-array "[\"python/finufft/finufft\"]"
+toml set --toml-path finufft/pyproject.toml \
+         tool.scikit-build.metadata.version.input "python/finufft/finufft/__init__.py"
+
+# Package the sdist.
+python3 -m build --verbose --sdist --outdir wheelhouse finufft