dev-python/appdirs: Use flit to ease bootstrap

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/appdirs/appdirs-1.4.4-r2.ebuild

@@ -0,0 +1,37 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# please keep this ebuild at EAPI 7 -- sys-apps/portage dep
+EAPI=7
+
+DISTUTILS_USE_PEP517=flit
+PYTHON_COMPAT=( python3_{8..10} pypy3 )
+
+inherit distutils-r1
+
+DESCRIPTION="Module for determining appropriate platform-specific dirs"
+HOMEPAGE="https://github.com/ActiveState/appdirs"
+SRC_URI="https://github.com/ActiveState/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+
+src_configure() {
+	[[ -e pyproject.toml ]] &&
+		die "Upstream added pyproject.toml, recheck"
+	# write a custom pyproject.toml to ease setuptools bootstrap
+	cat > pyproject.toml <<-EOF || die
+		[build-system]
+		requires = ["flit_core >=3.2,<4"]
+		build-backend = "flit_core.buildapi"
+
+		[project]
+		name = "appdirs"
+		dynamic = ["version", "description"]
+	EOF
+}
+
+python_test() {
+	"${PYTHON}" test/test_api.py -v || die "Tests fail with ${EPYTHON}"
+}