[image-build] Use repo from another variant

The config can now additionally specify other variants whose repos will
be passed on to koji. The previous way of specifying extra repos is
still available, as is the automatic adding of repo for current variant.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

tests/test_imagebuildphase.py

@@ -221,6 +221,61 @@ class TestImageBuildPhase(unittest.TestCase):
             "link_type": 'hardlink-or-copy',
         })
 
+    @mock.patch('pungi.phases.image_build.ThreadPool')
+    def test_image_build_set_extra_repos(self, ThreadPool):
+        compose = _DummyCompose({
+            'image_build': {
+                '^Server$': [
+                    {
+                        'format': [('docker', 'tar.xz')],
+                        'name': 'Fedora-Docker-Base',
+                        'target': 'f24',
+                        'version': 'Rawhide',
+                        'ksurl': 'git://git.fedorahosted.org/git/spin-kickstarts.git',
+                        'kickstart': "fedora-docker-base.ks",
+                        'distro': 'Fedora-20',
+                        'disk_size': 3,
+                        'arches': ['x86_64'],
+                        'repo_from': 'Everything',
+                    }
+                ]
+            },
+            'koji_profile': 'koji',
+        })
+
+        phase = ImageBuildPhase(compose)
+
+        phase.run()
+
+        # assert at least one thread was started
+        self.assertTrue(phase.pool.add.called)
+
+        self.assertTrue(phase.pool.queue_put.called_once)
+        args, kwargs = phase.pool.queue_put.call_args
+        self.assertEqual(args[0][0], compose)
+        self.maxDiff = None
+        self.assertDictEqual(args[0][1], {
+            "format": [('docker', 'tar.xz')],
+            "image_conf": {
+                'install_tree': '/ostree/$arch/Server',
+                'kickstart': 'fedora-docker-base.ks',
+                'format': 'docker',
+                'repo': '/ostree/$arch/Everything,/ostree/$arch/Server',
+                'variant': compose.variants['Server'],
+                'target': 'f24',
+                'disk_size': 3,
+                'name': 'Fedora-Docker-Base',
+                'arches': 'x86_64',
+                'version': 'Rawhide',
+                'ksurl': 'git://git.fedorahosted.org/git/spin-kickstarts.git',
+                'distro': 'Fedora-20',
+            },
+            "conf_file": 'Server-Fedora-Docker-Base-docker',
+            "image_dir": '/image_dir/Server/%(arch)s',
+            "relative_image_dir": 'image_dir/Server/%(arch)s',
+            "link_type": 'hardlink-or-copy',
+        })
+
 
 class TestCreateImageBuildThread(unittest.TestCase):