dev-python/mypy: Enable building with mypyc

Trying to disable C extensions did not buy us anything, so let's start
fresh.

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

dev-python/mypy/mypy-0.812-r2.ebuild

@@ -0,0 +1,61 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python3_{7..9} )
+DISTUTILS_USE_SETUPTOOLS=rdepend
+
+inherit distutils-r1
+
+DESCRIPTION="Optional static typing for Python"
+HOMEPAGE="http://www.mypy-lang.org/"
+TYPESHED_COMMIT="add4d92f050fb11d3901c6f0ee579a122d4a7a98"
+SRC_URI="
+	https://github.com/python/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz
+	https://github.com/python/typeshed/archive/${TYPESHED_COMMIT}.tar.gz
+		-> typeshed-${TYPESHED_COMMIT}.tar.gz
+"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~sparc ~x86"
+
+# stubgen collides with this package: https://bugs.gentoo.org/585594
+RDEPEND="
+	!dev-util/stubgen
+	>=dev-python/psutil-4[${PYTHON_USEDEP}]
+	>=dev-python/typed-ast-1.4.0[${PYTHON_USEDEP}]
+	<dev-python/typed-ast-1.5.0[${PYTHON_USEDEP}]
+	>=dev-python/typing-extensions-3.7.4[${PYTHON_USEDEP}]
+	>=dev-python/mypy_extensions-0.4.3[${PYTHON_USEDEP}]
+	<dev-python/mypy_extensions-0.5.0[${PYTHON_USEDEP}]
+"
+BDEPEND="
+	test? (
+		>=dev-python/attrs-18.0[${PYTHON_USEDEP}]
+		>=dev-python/lxml-4.4.0[${PYTHON_USEDEP}]
+		>=dev-python/pytest-6.1.0[${PYTHON_USEDEP}]
+		>=dev-python/pytest-xdist-1.18[${PYTHON_USEDEP}]
+		>=dev-python/py-1.5.2[${PYTHON_USEDEP}]
+		>=dev-python/virtualenv-16.0.0[${PYTHON_USEDEP}]
+	)
+"
+
+distutils_enable_sphinx docs/source dev-python/sphinx_rtd_theme
+distutils_enable_tests pytest
+
+src_unpack() {
+	default
+	rmdir "${S}/mypy/typeshed" || die
+	mv "${WORKDIR}/typeshed-${TYPESHED_COMMIT}" "${S}/mypy/typeshed" || die
+
+	export MYPY_USE_MYPYC=1
+}
+
+python_test() {
+	# Some mypy/test/testcmdline.py::PythonCmdlineSuite tests
+	# fail with high COLUMNS values
+	local -x COLUMNS=80
+	epytest -n "$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")"
+}