dev-python/anytree: add USE=dot, test dep on six, .gh suffix

- Fix PythonGHDistfileSuffix by adding .gh suffix to source archive.
- Add `USE=dot` to optionally pull in `media-gfx/graphviz`, or otherwise disable
related test.
- Add `dev-python/six` dependency required by `USE=test`.

Closes: https://bugs.gentoo.org/934415
Signed-off-by: Paul Zander <negril.nx+gentoo@gmail.com>

dev-python/anytree/Manifest

@@ -1 +1 @@
-DIST anytree-2.12.0.tar.gz 192330 BLAKE2B 117f80689b6610f622a41b2abb85cf54f2ba639659f80e6b8d163043d2552586ef11ed86532b19c7b69beec5e66ab3acad2f72ed0f1e9aa5d3832e4e8ec76457 SHA512 822a72cf84227a7b78cb3808eea585d783821d9c476f1b1e50d77cf982b4bf3c08011be9564ff5205a3efd0d982b03daabeb0067aea523a14002179c94451ff4
+DIST anytree-2.12.0.gh.tar.gz 192330 BLAKE2B 117f80689b6610f622a41b2abb85cf54f2ba639659f80e6b8d163043d2552586ef11ed86532b19c7b69beec5e66ab3acad2f72ed0f1e9aa5d3832e4e8ec76457 SHA512 822a72cf84227a7b78cb3808eea585d783821d9c476f1b1e50d77cf982b4bf3c08011be9564ff5205a3efd0d982b03daabeb0067aea523a14002179c94451ff4

dev-python/anytree/anytree-2.12.0.ebuild

@@ -7,17 +7,32 @@ PYTHON_COMPAT=( python3_{10..13} )
 DISTUTILS_USE_PEP517=poetry
 
 inherit distutils-r1
-# inherit pypi
 
 DESCRIPTION="Powerful and Lightweight Python Tree Data Structure with various plugins"
 HOMEPAGE="https://anytree.readthedocs.io/"
 
-SRC_URI="https://github.com/c0fec0de/anytree/archive/refs/tags/${PV}.tar.gz -> ${P}.tar.gz"
+SRC_URI="https://github.com/c0fec0de/anytree/archive/refs/tags/${PV}.tar.gz -> ${P}.gh.tar.gz"
 
 LICENSE="Apache-2.0"
 SLOT="0"
 KEYWORDS="~amd64 ~arm64 ~x86"
 
+IUSE="dot"
+
+RDEPEND="
+	dot? (
+		media-gfx/graphviz
+	)
+"
+
+DEPEND="${RDEPEND}
+	test? (
+		$(python_gen_cond_dep '
+			dev-python/six[${PYTHON_USEDEP}]
+		')
+	)
+"
+
 distutils_enable_sphinx docs
 distutils_enable_tests pytest
 
@@ -29,6 +44,14 @@ src_prepare(){
 
 python_test() {
 	local -x PYTEST_DISABLE_PLUGIN_AUTOLOAD=1
+	local -x EPYTEST_DESELECT=()
+
+	if ! use dot; then
+		EPYTEST_DESELECT+=(
+			"tests/test_dotexport.py::test_tree_png"
+		)
+	fi
+
 	cd "${S}/tests" || die
 	distutils-r1_python_test
 }

dev-python/anytree/metadata.xml

@@ -8,4 +8,7 @@
     <remote-id type="github">c0fec0de/anytree</remote-id>
     <remote-id type="pypi">Anytree</remote-id>
   </upstream>
+  <use>
+    <flag name="dot">allow to create dot graphs using <pkg>media-gfx/graphviz</pkg></flag>
+  </use>
 </pkgmetadata>