dev-python/nspektr: Add from Gentoo

It's from Gentoo commit ad04b8e6d0e1c17bb879f74200c6a88754a034b0.

It's a dependency of dev-python/setuptools.

sdk_container/src/third_party/portage-stable/dev-python/nspektr/Manifest

@@ -0,0 +1 @@
+DIST nspektr-0.3.0.tar.gz 6314 BLAKE2B cb7b9b5b35a455d4e72e78d93db49b4f8e274c7d7a6c8bf7ccca52cce2598a937d31b76f1a30c4aa6d673e4ce52c4645ce7392965df35b0888d1c69226e08f00 SHA512 6fc22ad7858858f3b956ba5918ca92468f13d4b7db0e4861b836e63153f7e4319c6468e4f73969ce3fb7845ca8d97808b9db2eb2705a47fe1a8c4c19b9c2ef33

sdk_container/src/third_party/portage-stable/dev-python/nspektr/metadata.xml

@@ -0,0 +1,11 @@
+<?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="github">jaraco/nspektr</remote-id>
+		<remote-id type="pypi">nspektr</remote-id>
+	</upstream>
+</pkgmetadata>

sdk_container/src/third_party/portage-stable/dev-python/nspektr/nspektr-0.3.0.ebuild

@@ -0,0 +1,67 @@
+# Copyright 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=( pypy3 python3_{8..11} )
+
+inherit distutils-r1
+
+DESCRIPTION="Distribution package dependency inspector"
+HOMEPAGE="
+	https://github.com/jaraco/nspektr/
+	https://pypi.org/project/nspektr/
+"
+SRC_URI="
+	https://github.com/jaraco/nspektr/archive/v${PV}.tar.gz
+		-> ${P}.tar.gz
+"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+
+RDEPEND="
+	>=dev-python/jaraco-context-4.1.1-r2[${PYTHON_USEDEP}]
+	>=dev-python/jaraco-functools-3.5.0-r2[${PYTHON_USEDEP}]
+	>=dev-python/more-itertools-8.12.0-r1[${PYTHON_USEDEP}]
+	>=dev-python/packaging-21.3-r2[${PYTHON_USEDEP}]
+	$(python_gen_cond_dep '
+		>=dev-python/importlib_metadata-4.11.2[${PYTHON_USEDEP}]
+	' 3.8 3.9)
+"
+
+distutils_enable_tests pytest
+
+src_prepare() {
+	# avoid unnecessary test dep on pip
+	sed -i -e 's:pip:pytest:' nspektr/__init__.py || die
+	distutils-r1_src_prepare
+}
+
+src_configure() {
+	grep -q 'build-backend = "setuptools' pyproject.toml ||
+		die "Upstream changed build-backend, 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 = "nspektr"
+		version = "${PV}"
+		description = "package inspector"
+
+		# tests inspect itself
+		[project.optional-dependencies]
+		docs = [
+			"fake-nonexisting",
+		]
+		testing = [
+			"pytest",
+		]
+	EOF
+}