dist-repo takes inherited arch when arch is not set

Fixes: https://pagure.io/koji/issue/2805

cli/koji_cli/commands.py

@@ -7453,16 +7453,21 @@ def handle_dist_repo(options, session, args):
     taginfo = session.getTag(tag)
     if not taginfo:
         parser.error(_('No such tag: %s') % tag)
+    allowed_arches = taginfo['arches'] or ''
+    if not allowed_arches:
+        for tag_inh in session.getFullInheritance(tag):
+            allowed_arches = session.getTag(tag_inh['parent_id'])['arches'] or ''
+            if allowed_arches:
+                break
     if len(task_opts.arch) == 0:
-        arches = taginfo['arches'] or ''
+        task_opts.arch = allowed_arches.split()
-        task_opts.arch = arches.split()
         if not task_opts.arch:
             parser.error(_('No arches given and no arches associated with tag'))
     else:
         for a in task_opts.arch:
-            if not taginfo['arches']:
+            if not allowed_arches:
                 warn('Tag %s has an empty arch list' % taginfo['name'])
-            elif a not in taginfo['arches']:
+            elif a not in allowed_arches:
                 warn('%s is not in the list of tag arches' % a)
     if task_opts.multilib:
         if not os.path.exists(task_opts.multilib):

tests/test_cli/test_dist_repo.py

@@ -28,6 +28,28 @@ class TestDistRepo(utils.CliTestCase):
         'maven_include_all': False,
         'perm_id': None
     }
+    TAG_2 = {
+        'maven_support': False,
+        'locked': False,
+        'name': 'fedora28-build',
+        'extra': {},
+        'perm': None,
+        'id': 3,
+        'arches': '',
+        'maven_include_all': False,
+        'perm_id': None
+    }
+    INHERITANCE = [{'child_id': 3,
+                    'currdepth': 1,
+                    'filter': [],
+                    'intransitive': False,
+                    'maxdepth': None,
+                    'name': 'fedora-26-build',
+                    'nextdepth': None,
+                    'noconfig': False,
+                    'parent_id': 2,
+                    'pkg_filter': '',
+                    'priority': 0}]
 
     def setUp(self):
         self.task_id = 1001
@@ -150,7 +172,7 @@ via 'koji edit-tag -x distrepo.cancel_others=True'
             [self.tag_name, self.fake_key],
             stderr=expected)
 
-        # Case 3. Arch field is empty in Tag
+        # Case 3. Arch field is empty in Tag (without inheritance)
         tag = copy.copy(self.TAG)
         tag.update({'arches': None})
         self.session.getTag.return_value = tag
@@ -162,6 +184,24 @@ via 'koji edit-tag -x distrepo.cancel_others=True'
             [self.tag_name, self.fake_key],
             stderr=expected)
 
+        # Case 4. Arch field is empty in Tag (with inheritance)
+        tag_1 = copy.copy(self.TAG)
+        tag_1.update({'arches': None})
+        tag_2 = copy.copy(self.TAG)
+        tag_2.update({'arches': None})
+        self.session.getTag.side_effect = [tag_2, tag_1]
+        self.session.getFullInheritance.return_value = self.INHERITANCE
+        expected = self.format_error_message('No arches given and no arches associated with tag')
+        self.assert_system_exit(
+            handle_dist_repo,
+            self.options,
+            self.session,
+            [tag_2['name'], self.fake_key],
+            stderr=expected)
+        expected_calls = [mock.call(tag_2['name']), mock.call(tag_1['id'])]
+        self.session.getTag.assert_has_calls(expected_calls)
+        self.session.getFullInheritance.assert_called_with(tag_2['name'])
+
     def test_handle_dist_repo_with_comp(self):
         comp_file = 'comp.xml'
         arguments = [self.tag_name, self.fake_key, '--comp', comp_file]
@@ -188,6 +228,8 @@ via 'koji edit-tag -x distrepo.cancel_others=True'
         for a in arches:
             arguments += ['--arch', a]
 
+        self.session.getFullInheritance.return_value = []
+        self.session.getTag.return_value = {'arches': 'x86_64', 'id': 1, 'name': self.tag_name}
         expected_warn = '%s is not in the list of tag arches' % arches[0] + "\n"
         expected_warn += '%s is not in the list of tag arches' % arches[2] + "\n"
         expected_warn += '%s is not in the list of tag arches' % arches[3] + "\n"