build/pkgs/sagelib: Use python-build

build/pkgs/sagelib/dependencies

@@ -1,4 +1,4 @@
-FORCE $(SCRIPTS) arb boost_cropped $(BLAS) brial cliquer cypari cysignals cython ecl eclib ecm flint libgd gap giac givaro glpk gmpy2 gsl iml jinja2 jupyter_core lcalc lrcalc_python libbraiding libhomfly libpng linbox m4ri m4rie memory_allocator mpc mpfi mpfr $(MP_LIBRARY) ntl numpy pari pip pkgconfig planarity ppl pplpy primesieve primecount primecountpy pycygwin $(PYTHON) requests rw sage_conf sagemath_objects sagemath_categories sagemath_environment sagemath_repl singular symmetrica zn_poly $(PCFILES) | $(PYTHON_TOOLCHAIN) sage_setup
+FORCE $(SCRIPTS) arb boost_cropped $(BLAS) brial cliquer cypari cysignals cython ecl eclib ecm flint libgd gap giac givaro glpk gmpy2 gsl iml jinja2 jupyter_core lcalc lrcalc_python libbraiding libhomfly libpng linbox m4ri m4rie memory_allocator mpc mpfi mpfr $(MP_LIBRARY) ntl numpy pari pip pkgconfig planarity ppl pplpy primesieve primecount primecountpy pycygwin $(PYTHON) requests rw sage_conf sagemath_objects sagemath_categories sagemath_environment sagemath_repl singular symmetrica zn_poly $(PCFILES) | $(PYTHON_TOOLCHAIN) python_build sage_setup
 
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 All lines of this file are ignored except the first.

build/pkgs/sagelib/spkg-install

@@ -68,10 +68,14 @@ else
     (cd "$SITEPACKAGESDIR" && rm -f sage/__init__.py)
     # Likewise, we should remove the egg-link that may have been installed previously.
     (cd "$SITEPACKAGESDIR" && rm -f sagemath-standard.egg-link)
-    # Use --no-build-isolation to avoid rebuilds because of dependencies:
+    # First build the sdist, then build the wheel from the sdist.
+    # https://pypa-build.readthedocs.io/en/latest/#python--m-build
+    # (Important because sagemath-objects uses MANIFEST.in for filtering.)
+    DIST_DIR="$(mktemp -d)"
+    # Use --no-isolation to avoid rebuilds because of dependencies:
     # Compiling sage/interfaces/sagespawn.pyx because it depends on /private/var/folders/38/wnh4gf1552g_crsjnv2vmmww0000gp/T/pip-build-env-609n5985/overlay/lib/python3.10/site-packages/Cython/Includes/posix/unistd.pxd
-    ############# FIXME: Copy from sagemath_objects spkg-install
-    time sdh_pip_install --no-build-isolation .
+    python3 -m build --no-isolation --outdir "$DIST_DIR"/dist . || sdh_die "Failure building sdist and wheel"
+    wheel=$(cd "$DIST_DIR" && sdh_store_and_pip_install_wheel . && echo $wheel)
 fi
 
 # Trac #33103: The temp.* directories are large after a full build.