python3-flit_core: update to 3.8.0.

srcpkgs/python3-flit_core/template

@@ -1,19 +1,39 @@
 # Template file for 'python3-flit_core'
 pkgname=python3-flit_core
-version=3.7.1
-revision=2
-build_wrksrc="flit_core"
-build_style=python3-pep517
-depends="python3-tomli"
+version=3.8.0
+revision=1
+build_wrksrc="flit-${version}/flit_core"
+# This package is required by python3-build and python3-installer, used by the
+# python3-pep517 style; so using that style here would create a cycle
+build_style=python3-module
+hostmakedepends="python3"
+depends="python3"
 checkdepends="python3-pytest python3-testpath $depends"
 short_desc="Simplified packaging of Python modules - PEP 517 build backend"
 maintainer="Andrew J. Hesford <ajh@sideband.org>"
 license="BSD-3-Clause"
 homepage="https://flit.readthedocs.io"
 changelog="https://flit.readthedocs.io/en/latest/history.html"
-distfiles="${PYPI_SITE}/f/flit/flit-${version}.tar.gz"
-checksum=3c9bd9c140515bfe62dd938c6610d10d6efb9e35cc647fc614fe5fb3a5036682
+# Pull the installer package directly to bootstrap the pep517 toolchain
+_installer_version="0.5.1"
+distfiles="${PYPI_SITE}/f/flit/flit-${version}.tar.gz
+ ${PYPI_SITE}/i/installer/installer-${_installer_version}.tar.gz
+"
+checksum="d0f2a8f4bd45dc794befbf5839ecc0fd3830d65a57bd52b5997542fac5d5e937
+ f970995ec2bb815e2fdaf7977b26b2091e1e386f0f42eafd5ac811953dc5d445"
+
+do_build() {
+	python3 -m flit_core.wheel
+}
+
+do_install() {
+	local pypath="../../installer-${_installer_version}/src"
+	if [ -n "${PYTHONPATH}" ]; then
+		pypath="${pypath}:${PYTHONPATH}"
+	fi
+
+	PYTHONPATH="${pypath}" python3 -m installer --destdir "${DESTDIR}" \
+		"dist/flit_core-${version}-py3-none-any.whl"
 
-post_install() {
 	vlicense ../LICENSE
 }