app-backup/duplicity: switch tarballs, wire up testsuite again

* Switch to tarballs from gitlab as the pypi sdist lacks the testsuite,
  see https://lists.nongnu.org/archive/html/duplicity-announce/2025-06/msg00001.html.

  No interesting differences otherwise between the tarballs.

* Enable tests again w/ d_e_t pytest, skipping lint tests that aren't
  relevant to packaging.

* Drop obsolete test dep (mock).

Bug: https://bugs.gentoo.org/920671
Closes: https://bugs.gentoo.org/959942
Signed-off-by: Sam James <sam@gentoo.org>

app-backup/duplicity/Manifest

@@ -1,3 +1,3 @@
 DIST duplicity-3.0.3.2.tar.gz 1929330 BLAKE2B 00c33519edca5eb4f4468cf510381b8177a042d86eb1256105c61b42a7e712bad7b57f4a23997d1c85d0ccddb758f53e88fa0d1725fc8fe054a1a54f82cb64c8 SHA512 6c7917fede2b049ef1c6c49778a38dd8bb100cece2f66e49b311057400bca6dc3396ae0598176ec478ad9f0fbc6c896f06fe46b90e3ac0469fb6d5d2ad8bcaab
 DIST duplicity-3.0.4.0.tar.gz 1925286 BLAKE2B 99c8b6e9d2d5f6f14254cbbf7f4cbeee097ab258915af1847ab1d6ad18b6a6a66f0db1dc3fc4a1ac6829f3a4019666208f3211bcdf60323370f52cc1ba46236b SHA512 c40f29a38863903f0e0f1930bf44ffcbc0333a94016c5345f28dec146a6a4b9cfa31662cd6cc66690afef0ce611d7cfaaaf245be47cc9f719d8dca7dc7f3f2c5
-DIST duplicity-3.0.5.tar.gz 900129 BLAKE2B 9b23515ca2d22394646c8dbc327de9631de45bb8aeddac682eb9bf03136691465d8fbd72070c952d8ea79a26825f442ec2fb93e7d833c795861b67c56afe7516 SHA512 a1810bf3b759bb36babea252131f838bbbcc50863103b7590e8bd54cdd83cbf1de460569f193ccff0e86e909408095a3db096fbfbbffeb773f7b317ee36edda5
+DIST duplicity-rel.3.0.5.tar.bz2 952327 BLAKE2B a5befdcfbca07655b690c681a7858e181029f6432583006872d9a1fe446a157717d6bfdc8462b087d719548ad8e761efb35b37ee23441bd7ed7830cbf5ed1612 SHA512 c57cd0192989ea98ef297aa5eb1e80f32f885af8c035521fffed115e2bd77af187b726a500e8d2e3f4100b00490cc62079dcba4568ca0d17239763477d3e7cb5

app-backup/duplicity/duplicity-3.0.5.ebuild

@@ -2,14 +2,17 @@
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
-PYTHON_COMPAT=( python3_10 python3_11 python3_12 python3_13 )
+
+PYTHON_COMPAT=( python3_{11..13} )
 DISTUTILS_USE_PEP517=setuptools
 DISTUTILS_EXT=1
 
-inherit distutils-r1 pypi
+inherit distutils-r1
 
 DESCRIPTION="Secure backup system using gnupg to encrypt data"
 HOMEPAGE="https://duplicity.gitlab.io/"
+SRC_URI="https://gitlab.com/duplicity/duplicity/-/archive/rel.${PV}/${PN}-rel.${PV}.tar.bz2"
+S="${WORKDIR}"/${PN}-rel.${PV}
 
 LICENSE="GPL-3"
 SLOT="0"
@@ -26,7 +29,6 @@ DEPEND="${CDEPEND}
 	dev-python/setuptools-scm[${PYTHON_USEDEP}]
 	test? (
 		app-arch/par2cmdline
-		dev-python/mock[${PYTHON_USEDEP}]
 		dev-python/pexpect[${PYTHON_USEDEP}]
 	)
 "
@@ -35,15 +37,18 @@ RDEPEND="${CDEPEND}
 	s3? ( dev-python/boto3[${PYTHON_USEDEP}] )
 "
 
-RESTRICT="test"
+EPYTEST_DESELECT=(
+	# Linting tests (black, pylint, etc); not relevant for us
+	testing/test_code.py::CodeTest::test_black
+	testing/test_code.py::CodeTest::test_pep8
+	testing/test_code.py::CodeTest::test_pylint
+)
 
 PATCHES=(
 	"${FILESDIR}/${P}-fix-docs-cmd.patch"
 )
 
-python_test() {
-	esetup.py test
-}
+distutils_enable_tests pytest
 
 pkg_postinst() {
 	elog "Duplicity has many optional dependencies to support various backends."