Support DNF5 UpdateVM for qvm-template

Related: QubesOS/qubes-issues#9244
(cherry picked from commit 83a68fa)

qubesadmin/tests/tools/qvm_template.py

@@ -1425,6 +1425,43 @@ def test_120_qrexec_repoquery_success(self, mock_payload):
         ])
         self.assertAllCalled()
 
+    @mock.patch('qubesadmin.tools.qvm_template.qrexec_payload')
+    def test_120_b_qrexec_repoquery_success_dnf5(self, mock_payload):
+        args = argparse.Namespace(updatevm='test-vm')
+        mock_payload.return_value = 'str1\nstr2'
+        self.app.expected_calls[('dom0', 'admin.vm.List', None, None)] = \
+            b'0\x00test-vm class=TemplateVM state=Halted\n'
+        self.app.expected_service_calls[
+                ('test-vm', 'qubes.TemplateSearch')] = \
+b'''qubes-template-debian-12-minimal|0|4.3.0|202405272135|qubes-templates-itl|228848654|1716847042|GPLv3+|http://www.qubes-os.org|Qubes OS template for debian-12-minimal|Qubes OS template for debian-12-minimal.|'''
+        # The above is actual data from Fedora 41 based UdpateVM (Sep-2024)
+        res = qubesadmin.tools.qvm_template.qrexec_repoquery(args, self.app,
+            'qubes-template-debian-12-minimal')
+        self.assertEqual(res, [
+            qubesadmin.tools.qvm_template.Template(
+                'debian-12-minimal',
+                '0',
+                '4.3.0',
+                '202405272135',
+                'qubes-templates-itl',
+                228848654,
+                datetime.datetime(2024, 5, 27, 21, 57, 22),
+                'GPLv3+',
+                'http://www.qubes-os.org',
+                'Qubes OS template for debian-12-minimal',
+                'Qubes OS template for debian-12-minimal.'
+            )
+        ])
+        self.assertEqual(self.app.service_calls, [
+            ('test-vm', 'qubes.TemplateSearch',
+                {'filter_esc': True, 'stdout': subprocess.PIPE}),
+            ('test-vm', 'qubes.TemplateSearch', b'str1\nstr2')
+        ])
+        self.assertEqual(mock_payload.mock_calls, [
+            mock.call(args, self.app, 'qubes-template-debian-12-minimal', False)
+        ])
+        self.assertAllCalled()
+
     @mock.patch('qubesadmin.tools.qvm_template.qrexec_payload')
     def test_121_qrexec_repoquery_refresh_success(self, mock_payload):
         args = argparse.Namespace(updatevm='test-vm')

qubesadmin/tools/qvm_template.py

@@ -550,6 +550,9 @@ def qrexec_repoquery(
         # This is because if .strip() is used, the .split() will not work.
         if line == '':
             continue
+        # This is specific to DNF5:
+        if line.endswith('|'):
+            line = line[:-1]
         entry = line.split('|')
         try:
             # If there is an incorrect number of entries, raise an error
@@ -573,9 +576,14 @@ def qrexec_repoquery(
                 raise ValueError
             dlsize = int(dlsize)
             # First verify that the date does not look weird, then parse it
-            if not re.fullmatch(date_re, buildtime):
+            if re.fullmatch(date_re, buildtime):
+                buildtime = datetime.datetime.strptime(buildtime, \
+                        '%Y-%m-%d %H:%M')
+            elif buildtime.isnumeric():
+                # DNF5 provides seconds since epoch
+                buildtime = datetime.datetime.fromtimestamp(int(buildtime))
+            else:
                 raise ValueError
-            buildtime = datetime.datetime.strptime(buildtime, '%Y-%m-%d %H:%M')
             # XXX: Perhaps whitelist licenses directly?
             if not re.fullmatch(licence_re, licence):
                 raise ValueError