Yocto 2.4

Move OpenBMC to Yocto 2.4(rocko)

Tested: Built and verified Witherspoon and Palmetto images
Change-Id: I12057b18610d6fb0e6903c60213690301e9b0c67
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/import-layers/yocto-poky/bitbake/lib/bb/tests/event.py b/import-layers/yocto-poky/bitbake/lib/bb/tests/event.py
new file mode 100644
index 0000000..c7eb1fe
--- /dev/null
+++ b/import-layers/yocto-poky/bitbake/lib/bb/tests/event.py
@@ -0,0 +1,377 @@
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+#
+# BitBake Tests for the Event implementation (event.py)
+#
+# Copyright (C) 2017 Intel Corporation
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+import unittest
+import bb
+import logging
+import bb.compat
+import bb.event
+import importlib
+import threading
+import time
+import pickle
+from unittest.mock import Mock
+from unittest.mock import call
+
+
+class EventQueueStub():
+    """ Class used as specification for UI event handler queue stub objects """
+    def __init__(self):
+        return
+
+    def send(self, event):
+        return
+
+
+class PickleEventQueueStub():
+    """ Class used as specification for UI event handler queue stub objects
+        with sendpickle method """
+    def __init__(self):
+        return
+
+    def sendpickle(self, pickled_event):
+        return
+
+
+class UIClientStub():
+    """ Class used as specification for UI event handler stub objects """
+    def __init__(self):
+        self.event = None
+
+
+class EventHandlingTest(unittest.TestCase):
+    """ Event handling test class """
+    _threadlock_test_calls = []
+
+    def setUp(self):
+        self._test_process = Mock()
+        ui_client1 = UIClientStub()
+        ui_client2 = UIClientStub()
+        self._test_ui1 = Mock(wraps=ui_client1)
+        self._test_ui2 = Mock(wraps=ui_client2)
+        importlib.reload(bb.event)
+
+    def _create_test_handlers(self):
+        """ Method used to create a test handler ordered dictionary """
+        test_handlers = bb.compat.OrderedDict()
+        test_handlers["handler1"] = self._test_process.handler1
+        test_handlers["handler2"] = self._test_process.handler2
+        return test_handlers
+
+    def test_class_handlers(self):
+        """ Test set_class_handlers and get_class_handlers methods """
+        test_handlers = self._create_test_handlers()
+        bb.event.set_class_handlers(test_handlers)
+        self.assertEqual(test_handlers,
+                         bb.event.get_class_handlers())
+
+    def test_handlers(self):
+        """ Test set_handlers and get_handlers """
+        test_handlers = self._create_test_handlers()
+        bb.event.set_handlers(test_handlers)
+        self.assertEqual(test_handlers,
+                         bb.event.get_handlers())
+
+    def test_clean_class_handlers(self):
+        """ Test clean_class_handlers method """
+        cleanDict = bb.compat.OrderedDict()
+        self.assertEqual(cleanDict,
+                         bb.event.clean_class_handlers())
+
+    def test_register(self):
+        """ Test register method for class handlers """
+        result = bb.event.register("handler", self._test_process.handler)
+        self.assertEqual(result, bb.event.Registered)
+        handlers_dict = bb.event.get_class_handlers()
+        self.assertIn("handler", handlers_dict)
+
+    def test_already_registered(self):
+        """ Test detection of an already registed class handler """
+        bb.event.register("handler", self._test_process.handler)
+        handlers_dict = bb.event.get_class_handlers()
+        self.assertIn("handler", handlers_dict)
+        result = bb.event.register("handler", self._test_process.handler)
+        self.assertEqual(result, bb.event.AlreadyRegistered)
+
+    def test_register_from_string(self):
+        """ Test register method receiving code in string """
+        result = bb.event.register("string_handler", "    return True")
+        self.assertEqual(result, bb.event.Registered)
+        handlers_dict = bb.event.get_class_handlers()
+        self.assertIn("string_handler", handlers_dict)
+
+    def test_register_with_mask(self):
+        """ Test register method with event masking """
+        mask = ["bb.event.OperationStarted",
+                "bb.event.OperationCompleted"]
+        result = bb.event.register("event_handler",
+                                   self._test_process.event_handler,
+                                   mask)
+        self.assertEqual(result, bb.event.Registered)
+        handlers_dict = bb.event.get_class_handlers()
+        self.assertIn("event_handler", handlers_dict)
+
+    def test_remove(self):
+        """ Test remove method for class handlers """
+        test_handlers = self._create_test_handlers()
+        bb.event.set_class_handlers(test_handlers)
+        count = len(test_handlers)
+        bb.event.remove("handler1", None)
+        test_handlers = bb.event.get_class_handlers()
+        self.assertEqual(len(test_handlers), count - 1)
+        with self.assertRaises(KeyError):
+            bb.event.remove("handler1", None)
+
+    def test_execute_handler(self):
+        """ Test execute_handler method for class handlers """
+        mask = ["bb.event.OperationProgress"]
+        result = bb.event.register("event_handler",
+                                   self._test_process.event_handler,
+                                   mask)
+        self.assertEqual(result, bb.event.Registered)
+        event = bb.event.OperationProgress(current=10, total=100)
+        bb.event.execute_handler("event_handler",
+                                 self._test_process.event_handler,
+                                 event,
+                                 None)
+        self._test_process.event_handler.assert_called_once_with(event)
+
+    def test_fire_class_handlers(self):
+        """ Test fire_class_handlers method """
+        mask = ["bb.event.OperationStarted"]
+        result = bb.event.register("event_handler1",
+                                   self._test_process.event_handler1,
+                                   mask)
+        self.assertEqual(result, bb.event.Registered)
+        result = bb.event.register("event_handler2",
+                                   self._test_process.event_handler2,
+                                   "*")
+        self.assertEqual(result, bb.event.Registered)
+        event1 = bb.event.OperationStarted()
+        event2 = bb.event.OperationCompleted(total=123)
+        bb.event.fire_class_handlers(event1, None)
+        bb.event.fire_class_handlers(event2, None)
+        bb.event.fire_class_handlers(event2, None)
+        expected_event_handler1 = [call(event1)]
+        expected_event_handler2 = [call(event1),
+                                   call(event2),
+                                   call(event2)]
+        self.assertEqual(self._test_process.event_handler1.call_args_list,
+                         expected_event_handler1)
+        self.assertEqual(self._test_process.event_handler2.call_args_list,
+                         expected_event_handler2)
+
+    def test_change_handler_event_mapping(self):
+        """ Test changing the event mapping for class handlers """
+        event1 = bb.event.OperationStarted()
+        event2 = bb.event.OperationCompleted(total=123)
+
+        # register handler for all events
+        result = bb.event.register("event_handler1",
+                                   self._test_process.event_handler1,
+                                   "*")
+        self.assertEqual(result, bb.event.Registered)
+        bb.event.fire_class_handlers(event1, None)
+        bb.event.fire_class_handlers(event2, None)
+        expected = [call(event1), call(event2)]
+        self.assertEqual(self._test_process.event_handler1.call_args_list,
+                         expected)
+
+        # unregister handler and register it only for OperationStarted
+        result = bb.event.remove("event_handler1",
+                                 self._test_process.event_handler1)
+        mask = ["bb.event.OperationStarted"]
+        result = bb.event.register("event_handler1",
+                                   self._test_process.event_handler1,
+                                   mask)
+        self.assertEqual(result, bb.event.Registered)
+        bb.event.fire_class_handlers(event1, None)
+        bb.event.fire_class_handlers(event2, None)
+        expected = [call(event1), call(event2), call(event1)]
+        self.assertEqual(self._test_process.event_handler1.call_args_list,
+                         expected)
+
+        # unregister handler and register it only for OperationCompleted
+        result = bb.event.remove("event_handler1",
+                                 self._test_process.event_handler1)
+        mask = ["bb.event.OperationCompleted"]
+        result = bb.event.register("event_handler1",
+                                   self._test_process.event_handler1,
+                                   mask)
+        self.assertEqual(result, bb.event.Registered)
+        bb.event.fire_class_handlers(event1, None)
+        bb.event.fire_class_handlers(event2, None)
+        expected = [call(event1), call(event2), call(event1), call(event2)]
+        self.assertEqual(self._test_process.event_handler1.call_args_list,
+                         expected)
+
+    def test_register_UIHhandler(self):
+        """ Test register_UIHhandler method """
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+
+    def test_UIHhandler_already_registered(self):
+        """ Test registering an UIHhandler already existing """
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 2)
+
+    def test_unregister_UIHhandler(self):
+        """ Test unregister_UIHhandler method """
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+        result = bb.event.unregister_UIHhandler(1)
+        self.assertIs(result, None)
+
+    def test_fire_ui_handlers(self):
+        """ Test fire_ui_handlers method """
+        self._test_ui1.event = Mock(spec_set=EventQueueStub)
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+        self._test_ui2.event = Mock(spec_set=PickleEventQueueStub)
+        result = bb.event.register_UIHhandler(self._test_ui2, mainui=True)
+        self.assertEqual(result, 2)
+        event1 = bb.event.OperationStarted()
+        bb.event.fire_ui_handlers(event1, None)
+        expected = [call(event1)]
+        self.assertEqual(self._test_ui1.event.send.call_args_list,
+                         expected)
+        expected = [call(pickle.dumps(event1))]
+        self.assertEqual(self._test_ui2.event.sendpickle.call_args_list,
+                         expected)
+
+    def test_fire(self):
+        """ Test fire method used to trigger class and ui event handlers """
+        mask = ["bb.event.ConfigParsed"]
+        result = bb.event.register("event_handler1",
+                                   self._test_process.event_handler1,
+                                   mask)
+
+        self._test_ui1.event = Mock(spec_set=EventQueueStub)
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+
+        event1 = bb.event.ConfigParsed()
+        bb.event.fire(event1, None)
+        expected = [call(event1)]
+        self.assertEqual(self._test_process.event_handler1.call_args_list,
+                         expected)
+        self.assertEqual(self._test_ui1.event.send.call_args_list,
+                         expected)
+
+    def test_fire_from_worker(self):
+        """ Test fire_from_worker method """
+        self._test_ui1.event = Mock(spec_set=EventQueueStub)
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+        event1 = bb.event.ConfigParsed()
+        bb.event.fire_from_worker(event1, None)
+        expected = [call(event1)]
+        self.assertEqual(self._test_ui1.event.send.call_args_list,
+                         expected)
+
+    def test_print_ui_queue(self):
+        """ Test print_ui_queue method """
+        event1 = bb.event.OperationStarted()
+        event2 = bb.event.OperationCompleted(total=123)
+        bb.event.fire(event1, None)
+        bb.event.fire(event2, None)
+        logger = logging.getLogger("BitBake")
+        logger.addHandler(bb.event.LogHandler())
+        logger.info("Test info LogRecord")
+        logger.warning("Test warning LogRecord")
+        with self.assertLogs("BitBake", level="INFO") as cm:
+            bb.event.print_ui_queue()
+        self.assertEqual(cm.output,
+                         ["INFO:BitBake:Test info LogRecord",
+                          "WARNING:BitBake:Test warning LogRecord"])
+
+    def _set_threadlock_test_mockups(self):
+        """ Create UI event handler mockups used in enable and disable
+            threadlock tests """
+        def ui1_event_send(event):
+            if type(event) is bb.event.ConfigParsed:
+                self._threadlock_test_calls.append("w1_ui1")
+            if type(event) is bb.event.OperationStarted:
+                self._threadlock_test_calls.append("w2_ui1")
+            time.sleep(2)
+
+        def ui2_event_send(event):
+            if type(event) is bb.event.ConfigParsed:
+                self._threadlock_test_calls.append("w1_ui2")
+            if type(event) is bb.event.OperationStarted:
+                self._threadlock_test_calls.append("w2_ui2")
+            time.sleep(2)
+
+        self._threadlock_test_calls = []
+        self._test_ui1.event = EventQueueStub()
+        self._test_ui1.event.send = ui1_event_send
+        result = bb.event.register_UIHhandler(self._test_ui1, mainui=True)
+        self.assertEqual(result, 1)
+        self._test_ui2.event = EventQueueStub()
+        self._test_ui2.event.send = ui2_event_send
+        result = bb.event.register_UIHhandler(self._test_ui2, mainui=True)
+        self.assertEqual(result, 2)
+
+    def _set_and_run_threadlock_test_workers(self):
+        """ Create and run the workers used to trigger events in enable and
+            disable threadlock tests """
+        worker1 = threading.Thread(target=self._thread_lock_test_worker1)
+        worker2 = threading.Thread(target=self._thread_lock_test_worker2)
+        worker1.start()
+        time.sleep(1)
+        worker2.start()
+        worker1.join()
+        worker2.join()
+
+    def _thread_lock_test_worker1(self):
+        """ First worker used to fire the ConfigParsed event for enable and
+            disable threadlocks tests """
+        bb.event.fire(bb.event.ConfigParsed(), None)
+
+    def _thread_lock_test_worker2(self):
+        """ Second worker used to fire the OperationStarted event for enable
+            and disable threadlocks tests """
+        bb.event.fire(bb.event.OperationStarted(), None)
+
+    def test_enable_threadlock(self):
+        """ Test enable_threadlock method """
+        self._set_threadlock_test_mockups()
+        bb.event.enable_threadlock()
+        self._set_and_run_threadlock_test_workers()
+        # Calls to UI handlers should be in order as all the registered
+        # handlers for the event coming from the first worker should be
+        # called before processing the event from the second worker.
+        self.assertEqual(self._threadlock_test_calls,
+                         ["w1_ui1", "w1_ui2", "w2_ui1", "w2_ui2"])
+
+    def test_disable_threadlock(self):
+        """ Test disable_threadlock method """
+        self._set_threadlock_test_mockups()
+        bb.event.disable_threadlock()
+        self._set_and_run_threadlock_test_workers()
+        # Calls to UI handlers should be intertwined together. Thanks to the
+        # delay in the registered handlers for the event coming from the first
+        # worker, the event coming from the second worker starts being
+        # processed before finishing handling the first worker event.
+        self.assertEqual(self._threadlock_test_calls,
+                         ["w1_ui1", "w2_ui1", "w1_ui2", "w2_ui2"])
diff --git a/import-layers/yocto-poky/bitbake/lib/bb/tests/fetch.py b/import-layers/yocto-poky/bitbake/lib/bb/tests/fetch.py
index 5a8d892..7d7c5d7 100644
--- a/import-layers/yocto-poky/bitbake/lib/bb/tests/fetch.py
+++ b/import-layers/yocto-poky/bitbake/lib/bb/tests/fetch.py
@@ -28,6 +28,11 @@
 from bb.fetch2 import FetchMethod
 import bb
 
+def skipIfNoNetwork():
+    if os.environ.get("BB_SKIP_NETTESTS") == "yes":
+        return unittest.skip("Network tests being skipped")
+    return lambda f: f
+
 class URITest(unittest.TestCase):
     test_uris = {
         "http://www.google.com/index.html" : {
@@ -518,141 +523,153 @@
             self.fetchUnpack(['file://a;subdir=/bin/sh'])
 
 class FetcherNetworkTest(FetcherTest):
+    @skipIfNoNetwork()
+    def test_fetch(self):
+        fetcher = bb.fetch.Fetch(["http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz", "http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.1.tar.gz"], self.d)
+        fetcher.download()
+        self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+        self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.1.tar.gz"), 57892)
+        self.d.setVar("BB_NO_NETWORK", "1")
+        fetcher = bb.fetch.Fetch(["http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz", "http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.1.tar.gz"], self.d)
+        fetcher.download()
+        fetcher.unpack(self.unpackdir)
+        self.assertEqual(len(os.listdir(self.unpackdir + "/bitbake-1.0/")), 9)
+        self.assertEqual(len(os.listdir(self.unpackdir + "/bitbake-1.1/")), 9)
 
-    if os.environ.get("BB_SKIP_NETTESTS") == "yes":
-        print("Unset BB_SKIP_NETTESTS to run network tests")
-    else:
-        def test_fetch(self):
-            fetcher = bb.fetch.Fetch(["http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz", "http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.1.tar.gz"], self.d)
-            fetcher.download()
-            self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
-            self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.1.tar.gz"), 57892)
-            self.d.setVar("BB_NO_NETWORK", "1")
-            fetcher = bb.fetch.Fetch(["http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz", "http://downloads.yoctoproject.org/releases/bitbake/bitbake-1.1.tar.gz"], self.d)
-            fetcher.download()
+    @skipIfNoNetwork()
+    def test_fetch_mirror(self):
+        self.d.setVar("MIRRORS", "http://.*/.* http://downloads.yoctoproject.org/releases/bitbake")
+        fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
+        fetcher.download()
+        self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+
+    @skipIfNoNetwork()
+    def test_fetch_mirror_of_mirror(self):
+        self.d.setVar("MIRRORS", "http://.*/.* http://invalid2.yoctoproject.org/ \n http://invalid2.yoctoproject.org/.* http://downloads.yoctoproject.org/releases/bitbake")
+        fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
+        fetcher.download()
+        self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+
+    @skipIfNoNetwork()
+    def test_fetch_file_mirror_of_mirror(self):
+        self.d.setVar("MIRRORS", "http://.*/.* file:///some1where/ \n file:///some1where/.* file://some2where/ \n file://some2where/.* http://downloads.yoctoproject.org/releases/bitbake")
+        fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
+        os.mkdir(self.dldir + "/some2where")
+        fetcher.download()
+        self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+
+    @skipIfNoNetwork()
+    def test_fetch_premirror(self):
+        self.d.setVar("PREMIRRORS", "http://.*/.* http://downloads.yoctoproject.org/releases/bitbake")
+        fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
+        fetcher.download()
+        self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+
+    @skipIfNoNetwork()
+    def gitfetcher(self, url1, url2):
+        def checkrevision(self, fetcher):
             fetcher.unpack(self.unpackdir)
-            self.assertEqual(len(os.listdir(self.unpackdir + "/bitbake-1.0/")), 9)
-            self.assertEqual(len(os.listdir(self.unpackdir + "/bitbake-1.1/")), 9)
+            revision = bb.process.run("git rev-parse HEAD", shell=True, cwd=self.unpackdir + "/git")[0].strip()
+            self.assertEqual(revision, "270a05b0b4ba0959fe0624d2a4885d7b70426da5")
 
-        def test_fetch_mirror(self):
-            self.d.setVar("MIRRORS", "http://.*/.* http://downloads.yoctoproject.org/releases/bitbake")
-            fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
-            fetcher.download()
-            self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+        self.d.setVar("BB_GENERATE_MIRROR_TARBALLS", "1")
+        self.d.setVar("SRCREV", "270a05b0b4ba0959fe0624d2a4885d7b70426da5")
+        fetcher = bb.fetch.Fetch([url1], self.d)
+        fetcher.download()
+        checkrevision(self, fetcher)
+        # Wipe out the dldir clone and the unpacked source, turn off the network and check mirror tarball works
+        bb.utils.prunedir(self.dldir + "/git2/")
+        bb.utils.prunedir(self.unpackdir)
+        self.d.setVar("BB_NO_NETWORK", "1")
+        fetcher = bb.fetch.Fetch([url2], self.d)
+        fetcher.download()
+        checkrevision(self, fetcher)
 
-        def test_fetch_mirror_of_mirror(self):
-            self.d.setVar("MIRRORS", "http://.*/.* http://invalid2.yoctoproject.org/ \n http://invalid2.yoctoproject.org/.* http://downloads.yoctoproject.org/releases/bitbake")
-            fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
-            fetcher.download()
-            self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+    @skipIfNoNetwork()
+    def test_gitfetch(self):
+        url1 = url2 = "git://git.openembedded.org/bitbake"
+        self.gitfetcher(url1, url2)
 
-        def test_fetch_file_mirror_of_mirror(self):
-            self.d.setVar("MIRRORS", "http://.*/.* file:///some1where/ \n file:///some1where/.* file://some2where/ \n file://some2where/.* http://downloads.yoctoproject.org/releases/bitbake")
-            fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
-            os.mkdir(self.dldir + "/some2where")
-            fetcher.download()
-            self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+    @skipIfNoNetwork()
+    def test_gitfetch_goodsrcrev(self):
+        # SRCREV is set but matches rev= parameter
+        url1 = url2 = "git://git.openembedded.org/bitbake;rev=270a05b0b4ba0959fe0624d2a4885d7b70426da5"
+        self.gitfetcher(url1, url2)
 
-        def test_fetch_premirror(self):
-            self.d.setVar("PREMIRRORS", "http://.*/.* http://downloads.yoctoproject.org/releases/bitbake")
-            fetcher = bb.fetch.Fetch(["http://invalid.yoctoproject.org/releases/bitbake/bitbake-1.0.tar.gz"], self.d)
-            fetcher.download()
-            self.assertEqual(os.path.getsize(self.dldir + "/bitbake-1.0.tar.gz"), 57749)
+    @skipIfNoNetwork()
+    def test_gitfetch_badsrcrev(self):
+        # SRCREV is set but does not match rev= parameter
+        url1 = url2 = "git://git.openembedded.org/bitbake;rev=dead05b0b4ba0959fe0624d2a4885d7b70426da5"
+        self.assertRaises(bb.fetch.FetchError, self.gitfetcher, url1, url2)
 
-        def gitfetcher(self, url1, url2):
-            def checkrevision(self, fetcher):
-                fetcher.unpack(self.unpackdir)
-                revision = bb.process.run("git rev-parse HEAD", shell=True, cwd=self.unpackdir + "/git")[0].strip()
-                self.assertEqual(revision, "270a05b0b4ba0959fe0624d2a4885d7b70426da5")
+    @skipIfNoNetwork()
+    def test_gitfetch_tagandrev(self):
+        # SRCREV is set but does not match rev= parameter
+        url1 = url2 = "git://git.openembedded.org/bitbake;rev=270a05b0b4ba0959fe0624d2a4885d7b70426da5;tag=270a05b0b4ba0959fe0624d2a4885d7b70426da5"
+        self.assertRaises(bb.fetch.FetchError, self.gitfetcher, url1, url2)
 
-            self.d.setVar("BB_GENERATE_MIRROR_TARBALLS", "1")
-            self.d.setVar("SRCREV", "270a05b0b4ba0959fe0624d2a4885d7b70426da5")
-            fetcher = bb.fetch.Fetch([url1], self.d)
-            fetcher.download()
-            checkrevision(self, fetcher)
-            # Wipe out the dldir clone and the unpacked source, turn off the network and check mirror tarball works
-            bb.utils.prunedir(self.dldir + "/git2/")
-            bb.utils.prunedir(self.unpackdir)
-            self.d.setVar("BB_NO_NETWORK", "1")
-            fetcher = bb.fetch.Fetch([url2], self.d)
-            fetcher.download()
-            checkrevision(self, fetcher)
+    @skipIfNoNetwork()
+    def test_gitfetch_localusehead(self):
+        # Create dummy local Git repo
+        src_dir = tempfile.mkdtemp(dir=self.tempdir,
+                                   prefix='gitfetch_localusehead_')
+        src_dir = os.path.abspath(src_dir)
+        bb.process.run("git init", cwd=src_dir)
+        bb.process.run("git commit --allow-empty -m'Dummy commit'",
+                       cwd=src_dir)
+        # Use other branch than master
+        bb.process.run("git checkout -b my-devel", cwd=src_dir)
+        bb.process.run("git commit --allow-empty -m'Dummy commit 2'",
+                       cwd=src_dir)
+        stdout = bb.process.run("git rev-parse HEAD", cwd=src_dir)
+        orig_rev = stdout[0].strip()
 
-        def test_gitfetch(self):
-            url1 = url2 = "git://git.openembedded.org/bitbake"
-            self.gitfetcher(url1, url2)
+        # Fetch and check revision
+        self.d.setVar("SRCREV", "AUTOINC")
+        url = "git://" + src_dir + ";protocol=file;usehead=1"
+        fetcher = bb.fetch.Fetch([url], self.d)
+        fetcher.download()
+        fetcher.unpack(self.unpackdir)
+        stdout = bb.process.run("git rev-parse HEAD",
+                                cwd=os.path.join(self.unpackdir, 'git'))
+        unpack_rev = stdout[0].strip()
+        self.assertEqual(orig_rev, unpack_rev)
 
-        def test_gitfetch_goodsrcrev(self):
-            # SRCREV is set but matches rev= parameter
-            url1 = url2 = "git://git.openembedded.org/bitbake;rev=270a05b0b4ba0959fe0624d2a4885d7b70426da5"
-            self.gitfetcher(url1, url2)
+    @skipIfNoNetwork()
+    def test_gitfetch_remoteusehead(self):
+        url = "git://git.openembedded.org/bitbake;usehead=1"
+        self.assertRaises(bb.fetch.ParameterError, self.gitfetcher, url, url)
 
-        def test_gitfetch_badsrcrev(self):
-            # SRCREV is set but does not match rev= parameter
-            url1 = url2 = "git://git.openembedded.org/bitbake;rev=dead05b0b4ba0959fe0624d2a4885d7b70426da5"
-            self.assertRaises(bb.fetch.FetchError, self.gitfetcher, url1, url2)
+    @skipIfNoNetwork()
+    def test_gitfetch_premirror(self):
+        url1 = "git://git.openembedded.org/bitbake"
+        url2 = "git://someserver.org/bitbake"
+        self.d.setVar("PREMIRRORS", "git://someserver.org/bitbake git://git.openembedded.org/bitbake \n")
+        self.gitfetcher(url1, url2)
 
-        def test_gitfetch_tagandrev(self):
-            # SRCREV is set but does not match rev= parameter
-            url1 = url2 = "git://git.openembedded.org/bitbake;rev=270a05b0b4ba0959fe0624d2a4885d7b70426da5;tag=270a05b0b4ba0959fe0624d2a4885d7b70426da5"
-            self.assertRaises(bb.fetch.FetchError, self.gitfetcher, url1, url2)
+    @skipIfNoNetwork()
+    def test_gitfetch_premirror2(self):
+        url1 = url2 = "git://someserver.org/bitbake"
+        self.d.setVar("PREMIRRORS", "git://someserver.org/bitbake git://git.openembedded.org/bitbake \n")
+        self.gitfetcher(url1, url2)
 
-        def test_gitfetch_localusehead(self):
-            # Create dummy local Git repo
-            src_dir = tempfile.mkdtemp(dir=self.tempdir,
-                                       prefix='gitfetch_localusehead_')
-            src_dir = os.path.abspath(src_dir)
-            bb.process.run("git init", cwd=src_dir)
-            bb.process.run("git commit --allow-empty -m'Dummy commit'",
-                           cwd=src_dir)
-            # Use other branch than master
-            bb.process.run("git checkout -b my-devel", cwd=src_dir)
-            bb.process.run("git commit --allow-empty -m'Dummy commit 2'",
-                           cwd=src_dir)
-            stdout = bb.process.run("git rev-parse HEAD", cwd=src_dir)
-            orig_rev = stdout[0].strip()
+    @skipIfNoNetwork()
+    def test_gitfetch_premirror3(self):
+        realurl = "git://git.openembedded.org/bitbake"
+        dummyurl = "git://someserver.org/bitbake"
+        self.sourcedir = self.unpackdir.replace("unpacked", "sourcemirror.git")
+        os.chdir(self.tempdir)
+        bb.process.run("git clone %s %s 2> /dev/null" % (realurl, self.sourcedir), shell=True)
+        self.d.setVar("PREMIRRORS", "%s git://%s;protocol=file \n" % (dummyurl, self.sourcedir))
+        self.gitfetcher(dummyurl, dummyurl)
 
-            # Fetch and check revision
-            self.d.setVar("SRCREV", "AUTOINC")
-            url = "git://" + src_dir + ";protocol=file;usehead=1"
-            fetcher = bb.fetch.Fetch([url], self.d)
-            fetcher.download()
-            fetcher.unpack(self.unpackdir)
-            stdout = bb.process.run("git rev-parse HEAD",
-                                    cwd=os.path.join(self.unpackdir, 'git'))
-            unpack_rev = stdout[0].strip()
-            self.assertEqual(orig_rev, unpack_rev)
-
-        def test_gitfetch_remoteusehead(self):
-            url = "git://git.openembedded.org/bitbake;usehead=1"
-            self.assertRaises(bb.fetch.ParameterError, self.gitfetcher, url, url)
-
-        def test_gitfetch_premirror(self):
-            url1 = "git://git.openembedded.org/bitbake"
-            url2 = "git://someserver.org/bitbake"
-            self.d.setVar("PREMIRRORS", "git://someserver.org/bitbake git://git.openembedded.org/bitbake \n")
-            self.gitfetcher(url1, url2)
-
-        def test_gitfetch_premirror2(self):
-            url1 = url2 = "git://someserver.org/bitbake"
-            self.d.setVar("PREMIRRORS", "git://someserver.org/bitbake git://git.openembedded.org/bitbake \n")
-            self.gitfetcher(url1, url2)
-
-        def test_gitfetch_premirror3(self):
-            realurl = "git://git.openembedded.org/bitbake"
-            dummyurl = "git://someserver.org/bitbake"
-            self.sourcedir = self.unpackdir.replace("unpacked", "sourcemirror.git")
-            os.chdir(self.tempdir)
-            bb.process.run("git clone %s %s 2> /dev/null" % (realurl, self.sourcedir), shell=True)
-            self.d.setVar("PREMIRRORS", "%s git://%s;protocol=file \n" % (dummyurl, self.sourcedir))
-            self.gitfetcher(dummyurl, dummyurl)
-
-        def test_git_submodule(self):
-            fetcher = bb.fetch.Fetch(["gitsm://git.yoctoproject.org/git-submodule-test;rev=f12e57f2edf0aa534cf1616fa983d165a92b0842"], self.d)
-            fetcher.download()
-            # Previous cwd has been deleted
-            os.chdir(os.path.dirname(self.unpackdir))
-            fetcher.unpack(self.unpackdir)
+    @skipIfNoNetwork()
+    def test_git_submodule(self):
+        fetcher = bb.fetch.Fetch(["gitsm://git.yoctoproject.org/git-submodule-test;rev=f12e57f2edf0aa534cf1616fa983d165a92b0842"], self.d)
+        fetcher.download()
+        # Previous cwd has been deleted
+        os.chdir(os.path.dirname(self.unpackdir))
+        fetcher.unpack(self.unpackdir)
 
 
 class TrustedNetworksTest(FetcherTest):
@@ -782,32 +799,32 @@
         ("db", "http://download.oracle.com/berkeley-db/db-5.3.21.tar.gz", "http://www.oracle.com/technetwork/products/berkeleydb/downloads/index-082944.html", "http://download.oracle.com/otn/berkeley-db/(?P<name>db-)(?P<pver>((\d+[\.\-_]*)+))\.tar\.gz")
             : "6.1.19",
     }
-    if os.environ.get("BB_SKIP_NETTESTS") == "yes":
-        print("Unset BB_SKIP_NETTESTS to run network tests")
-    else:
-        def test_git_latest_versionstring(self):
-            for k, v in self.test_git_uris.items():
-                self.d.setVar("PN", k[0])
-                self.d.setVar("SRCREV", k[2])
-                self.d.setVar("UPSTREAM_CHECK_GITTAGREGEX", k[3])
-                ud = bb.fetch2.FetchData(k[1], self.d)
-                pupver= ud.method.latest_versionstring(ud, self.d)
-                verstring = pupver[0]
-                self.assertTrue(verstring, msg="Could not find upstream version")
-                r = bb.utils.vercmp_string(v, verstring)
-                self.assertTrue(r == -1 or r == 0, msg="Package %s, version: %s <= %s" % (k[0], v, verstring))
 
-        def test_wget_latest_versionstring(self):
-            for k, v in self.test_wget_uris.items():
-                self.d.setVar("PN", k[0])
-                self.d.setVar("UPSTREAM_CHECK_URI", k[2])
-                self.d.setVar("UPSTREAM_CHECK_REGEX", k[3])
-                ud = bb.fetch2.FetchData(k[1], self.d)
-                pupver = ud.method.latest_versionstring(ud, self.d)
-                verstring = pupver[0]
-                self.assertTrue(verstring, msg="Could not find upstream version")
-                r = bb.utils.vercmp_string(v, verstring)
-                self.assertTrue(r == -1 or r == 0, msg="Package %s, version: %s <= %s" % (k[0], v, verstring))
+    @skipIfNoNetwork()
+    def test_git_latest_versionstring(self):
+        for k, v in self.test_git_uris.items():
+            self.d.setVar("PN", k[0])
+            self.d.setVar("SRCREV", k[2])
+            self.d.setVar("UPSTREAM_CHECK_GITTAGREGEX", k[3])
+            ud = bb.fetch2.FetchData(k[1], self.d)
+            pupver= ud.method.latest_versionstring(ud, self.d)
+            verstring = pupver[0]
+            self.assertTrue(verstring, msg="Could not find upstream version")
+            r = bb.utils.vercmp_string(v, verstring)
+            self.assertTrue(r == -1 or r == 0, msg="Package %s, version: %s <= %s" % (k[0], v, verstring))
+
+    @skipIfNoNetwork()
+    def test_wget_latest_versionstring(self):
+        for k, v in self.test_wget_uris.items():
+            self.d.setVar("PN", k[0])
+            self.d.setVar("UPSTREAM_CHECK_URI", k[2])
+            self.d.setVar("UPSTREAM_CHECK_REGEX", k[3])
+            ud = bb.fetch2.FetchData(k[1], self.d)
+            pupver = ud.method.latest_versionstring(ud, self.d)
+            verstring = pupver[0]
+            self.assertTrue(verstring, msg="Could not find upstream version")
+            r = bb.utils.vercmp_string(v, verstring)
+            self.assertTrue(r == -1 or r == 0, msg="Package %s, version: %s <= %s" % (k[0], v, verstring))
 
 
 class FetchCheckStatusTest(FetcherTest):
@@ -820,37 +837,636 @@
                       "https://yoctoproject.org/documentation",
                       "http://downloads.yoctoproject.org/releases/opkg/opkg-0.1.7.tar.gz",
                       "http://downloads.yoctoproject.org/releases/opkg/opkg-0.3.0.tar.gz",
-                      "ftp://ftp.gnu.org/gnu/autoconf/autoconf-2.60.tar.gz",
-                      "ftp://ftp.gnu.org/gnu/chess/gnuchess-5.08.tar.gz",
-                      "ftp://ftp.gnu.org/gnu/gmp/gmp-4.0.tar.gz",
+                      "ftp://sourceware.org/pub/libffi/libffi-1.20.tar.gz",
+                      "http://ftp.gnu.org/gnu/autoconf/autoconf-2.60.tar.gz",
+                      "https://ftp.gnu.org/gnu/chess/gnuchess-5.08.tar.gz",
+                      "https://ftp.gnu.org/gnu/gmp/gmp-4.0.tar.gz",
                       # GitHub releases are hosted on Amazon S3, which doesn't support HEAD
                       "https://github.com/kergoth/tslib/releases/download/1.1/tslib-1.1.tar.xz"
                       ]
 
-    if os.environ.get("BB_SKIP_NETTESTS") == "yes":
-        print("Unset BB_SKIP_NETTESTS to run network tests")
-    else:
-
-        def test_wget_checkstatus(self):
-            fetch = bb.fetch2.Fetch(self.test_wget_uris, self.d)
-            for u in self.test_wget_uris:
+    @skipIfNoNetwork()
+    def test_wget_checkstatus(self):
+        fetch = bb.fetch2.Fetch(self.test_wget_uris, self.d)
+        for u in self.test_wget_uris:
+            with self.subTest(url=u):
                 ud = fetch.ud[u]
                 m = ud.method
                 ret = m.checkstatus(fetch, ud, self.d)
                 self.assertTrue(ret, msg="URI %s, can't check status" % (u))
 
+    @skipIfNoNetwork()
+    def test_wget_checkstatus_connection_cache(self):
+        from bb.fetch2 import FetchConnectionCache
 
-        def test_wget_checkstatus_connection_cache(self):
-            from bb.fetch2 import FetchConnectionCache
+        connection_cache = FetchConnectionCache()
+        fetch = bb.fetch2.Fetch(self.test_wget_uris, self.d,
+                    connection_cache = connection_cache)
 
-            connection_cache = FetchConnectionCache()
-            fetch = bb.fetch2.Fetch(self.test_wget_uris, self.d,
-                        connection_cache = connection_cache)
-
-            for u in self.test_wget_uris:
+        for u in self.test_wget_uris:
+            with self.subTest(url=u):
                 ud = fetch.ud[u]
                 m = ud.method
                 ret = m.checkstatus(fetch, ud, self.d)
                 self.assertTrue(ret, msg="URI %s, can't check status" % (u))
 
-            connection_cache.close_connections()
+        connection_cache.close_connections()
+
+
+class GitMakeShallowTest(FetcherTest):
+    bitbake_dir = os.path.join(os.path.dirname(os.path.join(__file__)), '..', '..', '..')
+    make_shallow_path = os.path.join(bitbake_dir, 'bin', 'git-make-shallow')
+
+    def setUp(self):
+        FetcherTest.setUp(self)
+        self.gitdir = os.path.join(self.tempdir, 'gitshallow')
+        bb.utils.mkdirhier(self.gitdir)
+        bb.process.run('git init', cwd=self.gitdir)
+
+    def assertRefs(self, expected_refs):
+        actual_refs = self.git(['for-each-ref', '--format=%(refname)']).splitlines()
+        full_expected = self.git(['rev-parse', '--symbolic-full-name'] + expected_refs).splitlines()
+        self.assertEqual(sorted(full_expected), sorted(actual_refs))
+
+    def assertRevCount(self, expected_count, args=None):
+        if args is None:
+            args = ['HEAD']
+        revs = self.git(['rev-list'] + args)
+        actual_count = len(revs.splitlines())
+        self.assertEqual(expected_count, actual_count, msg='Object count `%d` is not the expected `%d`' % (actual_count, expected_count))
+
+    def git(self, cmd):
+        if isinstance(cmd, str):
+            cmd = 'git ' + cmd
+        else:
+            cmd = ['git'] + cmd
+        return bb.process.run(cmd, cwd=self.gitdir)[0]
+
+    def make_shallow(self, args=None):
+        if args is None:
+            args = ['HEAD']
+        return bb.process.run([self.make_shallow_path] + args, cwd=self.gitdir)
+
+    def add_empty_file(self, path, msg=None):
+        if msg is None:
+            msg = path
+        open(os.path.join(self.gitdir, path), 'w').close()
+        self.git(['add', path])
+        self.git(['commit', '-m', msg, path])
+
+    def test_make_shallow_single_branch_no_merge(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2)
+        self.make_shallow()
+        self.assertRevCount(1)
+
+    def test_make_shallow_single_branch_one_merge(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('checkout -b a_branch')
+        self.add_empty_file('c')
+        self.git('checkout master')
+        self.add_empty_file('d')
+        self.git('merge --no-ff --no-edit a_branch')
+        self.git('branch -d a_branch')
+        self.add_empty_file('e')
+        self.assertRevCount(6)
+        self.make_shallow(['HEAD~2'])
+        self.assertRevCount(5)
+
+    def test_make_shallow_at_merge(self):
+        self.add_empty_file('a')
+        self.git('checkout -b a_branch')
+        self.add_empty_file('b')
+        self.git('checkout master')
+        self.git('merge --no-ff --no-edit a_branch')
+        self.git('branch -d a_branch')
+        self.assertRevCount(3)
+        self.make_shallow()
+        self.assertRevCount(1)
+
+    def test_make_shallow_annotated_tag(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('tag -a -m a_tag a_tag')
+        self.assertRevCount(2)
+        self.make_shallow(['a_tag'])
+        self.assertRevCount(1)
+
+    def test_make_shallow_multi_ref(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('checkout -b a_branch')
+        self.add_empty_file('c')
+        self.git('checkout master')
+        self.add_empty_file('d')
+        self.git('checkout -b a_branch_2')
+        self.add_empty_file('a_tag')
+        self.git('tag a_tag')
+        self.git('checkout master')
+        self.git('branch -D a_branch_2')
+        self.add_empty_file('e')
+        self.assertRevCount(6, ['--all'])
+        self.make_shallow()
+        self.assertRevCount(5, ['--all'])
+
+    def test_make_shallow_multi_ref_trim(self):
+        self.add_empty_file('a')
+        self.git('checkout -b a_branch')
+        self.add_empty_file('c')
+        self.git('checkout master')
+        self.assertRevCount(1)
+        self.assertRevCount(2, ['--all'])
+        self.assertRefs(['master', 'a_branch'])
+        self.make_shallow(['-r', 'master', 'HEAD'])
+        self.assertRevCount(1, ['--all'])
+        self.assertRefs(['master'])
+
+    def test_make_shallow_noop(self):
+        self.add_empty_file('a')
+        self.assertRevCount(1)
+        self.make_shallow()
+        self.assertRevCount(1)
+
+    @skipIfNoNetwork()
+    def test_make_shallow_bitbake(self):
+        self.git('remote add origin https://github.com/openembedded/bitbake')
+        self.git('fetch --tags origin')
+        orig_revs = len(self.git('rev-list --all').splitlines())
+        self.make_shallow(['refs/tags/1.10.0'])
+        self.assertRevCount(orig_revs - 1746, ['--all'])
+
+class GitShallowTest(FetcherTest):
+    def setUp(self):
+        FetcherTest.setUp(self)
+        self.gitdir = os.path.join(self.tempdir, 'git')
+        self.srcdir = os.path.join(self.tempdir, 'gitsource')
+
+        bb.utils.mkdirhier(self.srcdir)
+        self.git('init', cwd=self.srcdir)
+        self.d.setVar('WORKDIR', self.tempdir)
+        self.d.setVar('S', self.gitdir)
+        self.d.delVar('PREMIRRORS')
+        self.d.delVar('MIRRORS')
+
+        uri = 'git://%s;protocol=file;subdir=${S}' % self.srcdir
+        self.d.setVar('SRC_URI', uri)
+        self.d.setVar('SRCREV', '${AUTOREV}')
+        self.d.setVar('AUTOREV', '${@bb.fetch2.get_autorev(d)}')
+
+        self.d.setVar('BB_GIT_SHALLOW', '1')
+        self.d.setVar('BB_GENERATE_MIRROR_TARBALLS', '0')
+        self.d.setVar('BB_GENERATE_SHALLOW_TARBALLS', '1')
+
+    def assertRefs(self, expected_refs, cwd=None):
+        if cwd is None:
+            cwd = self.gitdir
+        actual_refs = self.git(['for-each-ref', '--format=%(refname)'], cwd=cwd).splitlines()
+        full_expected = self.git(['rev-parse', '--symbolic-full-name'] + expected_refs, cwd=cwd).splitlines()
+        self.assertEqual(sorted(set(full_expected)), sorted(set(actual_refs)))
+
+    def assertRevCount(self, expected_count, args=None, cwd=None):
+        if args is None:
+            args = ['HEAD']
+        if cwd is None:
+            cwd = self.gitdir
+        revs = self.git(['rev-list'] + args, cwd=cwd)
+        actual_count = len(revs.splitlines())
+        self.assertEqual(expected_count, actual_count, msg='Object count `%d` is not the expected `%d`' % (actual_count, expected_count))
+
+    def git(self, cmd, cwd=None):
+        if isinstance(cmd, str):
+            cmd = 'git ' + cmd
+        else:
+            cmd = ['git'] + cmd
+        if cwd is None:
+            cwd = self.gitdir
+        return bb.process.run(cmd, cwd=cwd)[0]
+
+    def add_empty_file(self, path, cwd=None, msg=None):
+        if msg is None:
+            msg = path
+        if cwd is None:
+            cwd = self.srcdir
+        open(os.path.join(cwd, path), 'w').close()
+        self.git(['add', path], cwd)
+        self.git(['commit', '-m', msg, path], cwd)
+
+    def fetch(self, uri=None):
+        if uri is None:
+            uris = self.d.getVar('SRC_URI', True).split()
+            uri = uris[0]
+            d = self.d
+        else:
+            d = self.d.createCopy()
+            d.setVar('SRC_URI', uri)
+            uri = d.expand(uri)
+            uris = [uri]
+
+        fetcher = bb.fetch2.Fetch(uris, d)
+        fetcher.download()
+        ud = fetcher.ud[uri]
+        return fetcher, ud
+
+    def fetch_and_unpack(self, uri=None):
+        fetcher, ud = self.fetch(uri)
+        fetcher.unpack(self.d.getVar('WORKDIR'))
+        assert os.path.exists(self.d.getVar('S'))
+        return fetcher, ud
+
+    def fetch_shallow(self, uri=None, disabled=False, keepclone=False):
+        """Fetch a uri, generating a shallow tarball, then unpack using it"""
+        fetcher, ud = self.fetch_and_unpack(uri)
+        assert os.path.exists(ud.clonedir), 'Git clone in DLDIR (%s) does not exist for uri %s' % (ud.clonedir, uri)
+
+        # Confirm that the unpacked repo is unshallow
+        if not disabled:
+            assert os.path.exists(os.path.join(self.dldir, ud.mirrortarballs[0]))
+
+        # fetch and unpack, from the shallow tarball
+        bb.utils.remove(self.gitdir, recurse=True)
+        bb.utils.remove(ud.clonedir, recurse=True)
+
+        # confirm that the unpacked repo is used when no git clone or git
+        # mirror tarball is available
+        fetcher, ud = self.fetch_and_unpack(uri)
+        if not disabled:
+            assert os.path.exists(os.path.join(self.gitdir, '.git', 'shallow')), 'Unpacked git repository at %s is not shallow' % self.gitdir
+        else:
+            assert not os.path.exists(os.path.join(self.gitdir, '.git', 'shallow')), 'Unpacked git repository at %s is shallow' % self.gitdir
+        return fetcher, ud
+
+    def test_shallow_disabled(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW', '0')
+        self.fetch_shallow(disabled=True)
+        self.assertRevCount(2)
+
+    def test_shallow_nobranch(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        srcrev = self.git('rev-parse HEAD', cwd=self.srcdir).strip()
+        self.d.setVar('SRCREV', srcrev)
+        uri = self.d.getVar('SRC_URI', True).split()[0]
+        uri = '%s;nobranch=1;bare=1' % uri
+
+        self.fetch_shallow(uri)
+        self.assertRevCount(1)
+
+        # shallow refs are used to ensure the srcrev sticks around when we
+        # have no other branches referencing it
+        self.assertRefs(['refs/shallow/default'])
+
+    def test_shallow_default_depth_1(self):
+        # Create initial git repo
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.fetch_shallow()
+        self.assertRevCount(1)
+
+    def test_shallow_depth_0_disables(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        self.fetch_shallow(disabled=True)
+        self.assertRevCount(2)
+
+    def test_shallow_depth_default_override(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '2')
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH_default', '1')
+        self.fetch_shallow()
+        self.assertRevCount(1)
+
+    def test_shallow_depth_default_override_disable(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.add_empty_file('c')
+        self.assertRevCount(3, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH_default', '2')
+        self.fetch_shallow()
+        self.assertRevCount(2)
+
+    def test_current_shallow_out_of_date_clone(self):
+        # Create initial git repo
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.add_empty_file('c')
+        self.assertRevCount(3, cwd=self.srcdir)
+
+        # Clone and generate mirror tarball
+        fetcher, ud = self.fetch()
+
+        # Ensure we have a current mirror tarball, but an out of date clone
+        self.git('update-ref refs/heads/master refs/heads/master~1', cwd=ud.clonedir)
+        self.assertRevCount(2, cwd=ud.clonedir)
+
+        # Fetch and unpack, from the current tarball, not the out of date clone
+        bb.utils.remove(self.gitdir, recurse=True)
+        fetcher, ud = self.fetch()
+        fetcher.unpack(self.d.getVar('WORKDIR'))
+        self.assertRevCount(1)
+
+    def test_shallow_single_branch_no_merge(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.fetch_shallow()
+        self.assertRevCount(1)
+        assert os.path.exists(os.path.join(self.gitdir, 'a'))
+        assert os.path.exists(os.path.join(self.gitdir, 'b'))
+
+    def test_shallow_no_dangling(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.fetch_shallow()
+        self.assertRevCount(1)
+        assert not self.git('fsck --dangling')
+
+    def test_shallow_srcrev_branch_truncation(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        b_commit = self.git('rev-parse HEAD', cwd=self.srcdir).rstrip()
+        self.add_empty_file('c')
+        self.assertRevCount(3, cwd=self.srcdir)
+
+        self.d.setVar('SRCREV', b_commit)
+        self.fetch_shallow()
+
+        # The 'c' commit was removed entirely, and 'a' was removed from history
+        self.assertRevCount(1, ['--all'])
+        self.assertEqual(self.git('rev-parse HEAD').strip(), b_commit)
+        assert os.path.exists(os.path.join(self.gitdir, 'a'))
+        assert os.path.exists(os.path.join(self.gitdir, 'b'))
+        assert not os.path.exists(os.path.join(self.gitdir, 'c'))
+
+    def test_shallow_ref_pruning(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('branch a_branch', cwd=self.srcdir)
+        self.assertRefs(['master', 'a_branch'], cwd=self.srcdir)
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.fetch_shallow()
+
+        self.assertRefs(['master', 'origin/master'])
+        self.assertRevCount(1)
+
+    def test_shallow_submodules(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        smdir = os.path.join(self.tempdir, 'gitsubmodule')
+        bb.utils.mkdirhier(smdir)
+        self.git('init', cwd=smdir)
+        self.add_empty_file('asub', cwd=smdir)
+
+        self.git('submodule init', cwd=self.srcdir)
+        self.git('submodule add file://%s' % smdir, cwd=self.srcdir)
+        self.git('submodule update', cwd=self.srcdir)
+        self.git('commit -m submodule -a', cwd=self.srcdir)
+
+        uri = 'gitsm://%s;protocol=file;subdir=${S}' % self.srcdir
+        fetcher, ud = self.fetch_shallow(uri)
+
+        self.assertRevCount(1)
+        assert './.git/modules/' in bb.process.run('tar -tzf %s' % os.path.join(self.dldir, ud.mirrortarballs[0]))[0]
+        assert os.listdir(os.path.join(self.gitdir, 'gitsubmodule'))
+
+    if any(os.path.exists(os.path.join(p, 'git-annex')) for p in os.environ.get('PATH').split(':')):
+        def test_shallow_annex(self):
+            self.add_empty_file('a')
+            self.add_empty_file('b')
+            self.git('annex init', cwd=self.srcdir)
+            open(os.path.join(self.srcdir, 'c'), 'w').close()
+            self.git('annex add c', cwd=self.srcdir)
+            self.git('commit -m annex-c -a', cwd=self.srcdir)
+            bb.process.run('chmod u+w -R %s' % os.path.join(self.srcdir, '.git', 'annex'))
+
+            uri = 'gitannex://%s;protocol=file;subdir=${S}' % self.srcdir
+            fetcher, ud = self.fetch_shallow(uri)
+
+            self.assertRevCount(1)
+            assert './.git/annex/' in bb.process.run('tar -tzf %s' % os.path.join(self.dldir, ud.mirrortarballs[0]))[0]
+            assert os.path.exists(os.path.join(self.gitdir, 'c'))
+
+    def test_shallow_multi_one_uri(self):
+        # Create initial git repo
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('checkout -b a_branch', cwd=self.srcdir)
+        self.add_empty_file('c')
+        self.add_empty_file('d')
+        self.git('checkout master', cwd=self.srcdir)
+        self.git('tag v0.0 a_branch', cwd=self.srcdir)
+        self.add_empty_file('e')
+        self.git('merge --no-ff --no-edit a_branch', cwd=self.srcdir)
+        self.add_empty_file('f')
+        self.assertRevCount(7, cwd=self.srcdir)
+
+        uri = self.d.getVar('SRC_URI', True).split()[0]
+        uri = '%s;branch=master,a_branch;name=master,a_branch' % uri
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        self.d.setVar('BB_GIT_SHALLOW_REVS', 'v0.0')
+        self.d.setVar('SRCREV_master', '${AUTOREV}')
+        self.d.setVar('SRCREV_a_branch', '${AUTOREV}')
+
+        self.fetch_shallow(uri)
+
+        self.assertRevCount(5)
+        self.assertRefs(['master', 'origin/master', 'origin/a_branch'])
+
+    def test_shallow_multi_one_uri_depths(self):
+        # Create initial git repo
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('checkout -b a_branch', cwd=self.srcdir)
+        self.add_empty_file('c')
+        self.add_empty_file('d')
+        self.git('checkout master', cwd=self.srcdir)
+        self.add_empty_file('e')
+        self.git('merge --no-ff --no-edit a_branch', cwd=self.srcdir)
+        self.add_empty_file('f')
+        self.assertRevCount(7, cwd=self.srcdir)
+
+        uri = self.d.getVar('SRC_URI', True).split()[0]
+        uri = '%s;branch=master,a_branch;name=master,a_branch' % uri
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH_master', '3')
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH_a_branch', '1')
+        self.d.setVar('SRCREV_master', '${AUTOREV}')
+        self.d.setVar('SRCREV_a_branch', '${AUTOREV}')
+
+        self.fetch_shallow(uri)
+
+        self.assertRevCount(4, ['--all'])
+        self.assertRefs(['master', 'origin/master', 'origin/a_branch'])
+
+    def test_shallow_clone_preferred_over_shallow(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        # Fetch once to generate the shallow tarball
+        fetcher, ud = self.fetch()
+        assert os.path.exists(os.path.join(self.dldir, ud.mirrortarballs[0]))
+
+        # Fetch and unpack with both the clonedir and shallow tarball available
+        bb.utils.remove(self.gitdir, recurse=True)
+        fetcher, ud = self.fetch_and_unpack()
+
+        # The unpacked tree should *not* be shallow
+        self.assertRevCount(2)
+        assert not os.path.exists(os.path.join(self.gitdir, '.git', 'shallow'))
+
+    def test_shallow_mirrors(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        # Fetch once to generate the shallow tarball
+        fetcher, ud = self.fetch()
+        mirrortarball = ud.mirrortarballs[0]
+        assert os.path.exists(os.path.join(self.dldir, mirrortarball))
+
+        # Set up the mirror
+        mirrordir = os.path.join(self.tempdir, 'mirror')
+        bb.utils.mkdirhier(mirrordir)
+        self.d.setVar('PREMIRRORS', 'git://.*/.* file://%s/\n' % mirrordir)
+
+        os.rename(os.path.join(self.dldir, mirrortarball),
+                  os.path.join(mirrordir, mirrortarball))
+
+        # Fetch from the mirror
+        bb.utils.remove(self.dldir, recurse=True)
+        bb.utils.remove(self.gitdir, recurse=True)
+        self.fetch_and_unpack()
+        self.assertRevCount(1)
+
+    def test_shallow_invalid_depth(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '-12')
+        with self.assertRaises(bb.fetch2.FetchError):
+            self.fetch()
+
+    def test_shallow_invalid_depth_default(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH_default', '-12')
+        with self.assertRaises(bb.fetch2.FetchError):
+            self.fetch()
+
+    def test_shallow_extra_refs(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('branch a_branch', cwd=self.srcdir)
+        self.assertRefs(['master', 'a_branch'], cwd=self.srcdir)
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_EXTRA_REFS', 'refs/heads/a_branch')
+        self.fetch_shallow()
+
+        self.assertRefs(['master', 'origin/master', 'origin/a_branch'])
+        self.assertRevCount(1)
+
+    def test_shallow_extra_refs_wildcard(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('branch a_branch', cwd=self.srcdir)
+        self.git('tag v1.0', cwd=self.srcdir)
+        self.assertRefs(['master', 'a_branch', 'v1.0'], cwd=self.srcdir)
+        self.assertRevCount(2, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_EXTRA_REFS', 'refs/tags/*')
+        self.fetch_shallow()
+
+        self.assertRefs(['master', 'origin/master', 'v1.0'])
+        self.assertRevCount(1)
+
+    def test_shallow_missing_extra_refs(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        self.d.setVar('BB_GIT_SHALLOW_EXTRA_REFS', 'refs/heads/foo')
+        with self.assertRaises(bb.fetch2.FetchError):
+            self.fetch()
+
+    def test_shallow_missing_extra_refs_wildcard(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        self.d.setVar('BB_GIT_SHALLOW_EXTRA_REFS', 'refs/tags/*')
+        self.fetch()
+
+    def test_shallow_remove_revs(self):
+        # Create initial git repo
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+        self.git('checkout -b a_branch', cwd=self.srcdir)
+        self.add_empty_file('c')
+        self.add_empty_file('d')
+        self.git('checkout master', cwd=self.srcdir)
+        self.git('tag v0.0 a_branch', cwd=self.srcdir)
+        self.add_empty_file('e')
+        self.git('merge --no-ff --no-edit a_branch', cwd=self.srcdir)
+        self.git('branch -d a_branch', cwd=self.srcdir)
+        self.add_empty_file('f')
+        self.assertRevCount(7, cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        self.d.setVar('BB_GIT_SHALLOW_REVS', 'v0.0')
+
+        self.fetch_shallow()
+
+        self.assertRevCount(5)
+
+    def test_shallow_invalid_revs(self):
+        self.add_empty_file('a')
+        self.add_empty_file('b')
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        self.d.setVar('BB_GIT_SHALLOW_REVS', 'v0.0')
+
+        with self.assertRaises(bb.fetch2.FetchError):
+            self.fetch()
+
+    @skipIfNoNetwork()
+    def test_bitbake(self):
+        self.git('remote add --mirror=fetch origin git://github.com/openembedded/bitbake', cwd=self.srcdir)
+        self.git('config core.bare true', cwd=self.srcdir)
+        self.git('fetch', cwd=self.srcdir)
+
+        self.d.setVar('BB_GIT_SHALLOW_DEPTH', '0')
+        # Note that the 1.10.0 tag is annotated, so this also tests
+        # reference of an annotated vs unannotated tag
+        self.d.setVar('BB_GIT_SHALLOW_REVS', '1.10.0')
+
+        self.fetch_shallow()
+
+        # Confirm that the history of 1.10.0 was removed
+        orig_revs = len(self.git('rev-list master', cwd=self.srcdir).splitlines())
+        revs = len(self.git('rev-list master').splitlines())
+        self.assertNotEqual(orig_revs, revs)
+        self.assertRefs(['master', 'origin/master'])
+        self.assertRevCount(orig_revs - 1758)
diff --git a/import-layers/yocto-poky/bitbake/lib/bb/tests/parse.py b/import-layers/yocto-poky/bitbake/lib/bb/tests/parse.py
index ab6ca90..8f16ba4 100644
--- a/import-layers/yocto-poky/bitbake/lib/bb/tests/parse.py
+++ b/import-layers/yocto-poky/bitbake/lib/bb/tests/parse.py
@@ -83,7 +83,28 @@
         self.assertEqual(d.getVar("A"), None)
         self.assertEqual(d.getVarFlag("A","flag"), None)
         self.assertEqual(d.getVar("B"), "2")
-        
+
+    exporttest = """
+A = "a"
+export B = "b"
+export C
+exportD = "d"
+"""
+
+    def test_parse_exports(self):
+        f = self.parsehelper(self.exporttest)
+        d = bb.parse.handle(f.name, self.d)['']
+        self.assertEqual(d.getVar("A"), "a")
+        self.assertIsNone(d.getVarFlag("A", "export"))
+        self.assertEqual(d.getVar("B"), "b")
+        self.assertEqual(d.getVarFlag("B", "export"), 1)
+        self.assertIsNone(d.getVar("C"))
+        self.assertEqual(d.getVarFlag("C", "export"), 1)
+        self.assertIsNone(d.getVar("D"))
+        self.assertIsNone(d.getVarFlag("D", "export"))
+        self.assertEqual(d.getVar("exportD"), "d")
+        self.assertIsNone(d.getVarFlag("exportD", "export"))
+
 
     overridetest = """
 RRECOMMENDS_${PN} = "a"