ubuntu-drivers: emit latelink=true debconf to accept nvidia eula

To accept NVIDIA EULA, cloud-init needs to emit latelink=true debconf
setting to the linux-restricted-modules package to allow NVIDIA
drivers to properly link to the running kernel.

LP: #1840080

1 files changed, 11 insertions, 0 deletions

diff --git a/tests/unittests/test_handler/test_handler_apt_source_v3.py b/tests/unittests/test_handler/test_handler_apt_source_v3.py
index 90fe6eed..2f21b6dc 100644
--- a/tests/unittests/test_handler/test_handler_apt_source_v3.py
+++ b/tests/unittests/test_handler/test_handler_apt_source_v3.py
@@ -998,6 +998,17 @@ deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
 
 class TestDebconfSelections(TestCase):
 
+    @mock.patch("cloudinit.config.cc_apt_configure.util.subp")
+    def test_set_sel_appends_newline_if_absent(self, m_subp):
+        """Automatically append a newline to debconf-set-selections config."""
+        selections = b'some/setting boolean true'
+        cc_apt_configure.debconf_set_selections(selections=selections)
+        cc_apt_configure.debconf_set_selections(selections=selections + b'\n')
+        m_call = mock.call(
+            ['debconf-set-selections'], data=selections + b'\n', capture=True,
+            target=None)
+        self.assertEqual([m_call, m_call], m_subp.call_args_list)
+
     @mock.patch("cloudinit.config.cc_apt_configure.debconf_set_selections")
     def test_no_set_sel_if_none_to_set(self, m_set_sel):
         cc_apt_configure.apply_debconf_selections({'foo': 'bar'})