dev-python/flit_scm: New package, v1.5.0

New NIH build system, needed for exceptiongroup that is needed
for dev-python/cattrs.

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

dev-python/flit_scm/Manifest

@@ -0,0 +1 @@
+DIST flit_scm-1.5.0.tar.bz2 3230 BLAKE2B f29f7c0cc341fe12d621d0a8f91b5d983f8f7e4259155a7119b07d8e159a12755ae60e007d1ace9054385104aa2a572454653ef9f92a3043777b1e631dfd5f20 SHA512 1b8d4a653dffb4685ad91843147ba6dc693b6d1d4f21e8766782d04edc1ec992e3ad4a3ce82d25e01a089816648f86228db75024e39a7a277b6fae9f8fc4567a

dev-python/flit_scm/flit_scm-1.5.0.ebuild

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+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=standalone
+PYTHON_COMPAT=( pypy3 python3_{8..10} )
+
+inherit distutils-r1
+
+DESCRIPTION="A PEP 518 build backend combining flit with setuptools_scm"
+HOMEPAGE="
+	https://gitlab.com/WillDaSilva/flit_scm/
+	https://pypi.org/project/flit-scm/
+"
+SRC_URI="
+	https://gitlab.com/WillDaSilva/flit_scm/-/archive/${PV}/${P}.tar.bz2
+"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64"
+
+RDEPEND="
+	>=dev-python/flit_core-3.5.0[${PYTHON_USEDEP}]
+	>=dev-python/setuptools_scm-6.4.2[${PYTHON_USEDEP}]
+	<dev-python/tomli-3[${PYTHON_USEDEP}]
+	>=dev-python/tomli-2[${PYTHON_USEDEP}]
+"
+
+src_prepare() {
+	# unpin deps
+	sed -i -e 's:==[0-9.]*::' pyproject.toml || die
+	distutils-r1_src_prepare
+}
+
+export SETUPTOOLS_SCM_PRETEND_VERSION=${PV}

dev-python/flit_scm/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>python@gentoo.org</email>
+	</maintainer>
+	<upstream>
+		<remote-id type="pypi">flit-scm</remote-id>
+	</upstream>
+</pkgmetadata>