meson-python: build as a Python package

With meson alone we are missing the Python metadata and other packages
can't read the package metadata (for checking the version for example,
like python-contourpy does)

mingw-w64-meson-python/PKGBUILD

@@ -4,7 +4,7 @@ _realname=meson-python
 pkgbase=mingw-w64-${_realname}
 pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}")
 pkgver=0.17.1
-pkgrel=2
+pkgrel=3
 pkgdesc="Meson PEP 517 Python build backend (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -19,29 +19,26 @@ depends=("${MINGW_PACKAGE_PREFIX}-meson"
          "${MINGW_PACKAGE_PREFIX}-python"
          "${MINGW_PACKAGE_PREFIX}-python-packaging"
          "${MINGW_PACKAGE_PREFIX}-python-pyproject-metadata")
-makedepends=()
+makedepends=(
+  "${MINGW_PACKAGE_PREFIX}-python-build"
+  "${MINGW_PACKAGE_PREFIX}-python-installer"
+)
 options=('!strip')
 source=("https://pypi.org/packages/source/${_realname::1}/${_realname}/${_realname/-/_}-${pkgver}.tar.gz")
 sha256sums=('efb91f69f2e19eef7bc9a471ed2a4e730088cc6b39eacaf3e49fc4f930eb5f83')
 
 build() {
-  mkdir -p build-${MSYSTEM} && cd build-${MSYSTEM}
+  cd "${_realname/-/_}-${pkgver}"
 
-  MSYS2_ARG_CONV_EXCL="--prefix=" \
-    ${MINGW_PREFIX}/bin/meson setup \
-      --prefix="${MINGW_PREFIX}" \
-      --wrap-mode=nodownload \
-      --auto-features=enabled \
-      --buildtype=plain \
-      ../${_realname/-/_}-${pkgver}
-
-  ${MINGW_PREFIX}/bin/meson compile
+  python -m build --wheel --skip-dependency-check --no-isolation
 }
 
 package() {
-  cd "${srcdir}/build-${MSYSTEM}"
+  cd "${_realname/-/_}-${pkgver}"
 
-  DESTDIR="${pkgdir}" ${MINGW_PREFIX}/bin/meson install
+  MSYS2_ARG_CONV_EXCL="--prefix=" \
+    python -m installer --prefix=${MINGW_PREFIX} \
+    --destdir="${pkgdir}" dist/*.whl
 
   install -Dm644 "${srcdir}/${_realname/-/_}-${pkgver}/LICENSE" \
     "${pkgdir}${MINGW_PREFIX}/share/licenses/${_realname}/LICENSE"