def test_invalid_mountinfo(self):
self.fake_logger = fixtures.FakeLogger(level=logging.WARN)
self.useFixture(self.fake_logger)
mountinfo.MountInfo(
mountinfo_file=self._write_mountinfo(dedent("I'm invalid")))
# Assert that a warning was logged
self.assertThat(
self.fake_logger.output,
Equals("Unable to parse mountinfo row: I'm invalid\n"),
)
def _cleanup_common_directories_for_step(step, project: "Project", parts=None):
if not parts:
parts = []
being_tried = False
message: Optional[str] = None
if step <= steps.PRIME:
# Remove the priming area. Only remove the actual 'prime' directory if
# it's NOT being used in 'snap try'. We'll know that if it's
# bind-mounted somewhere.
mounts = mountinfo.MountInfo()
try:
mounts.for_root(project.prime_dir)
except errors.RootNotMountedError:
remove_dir = True
message = "Cleaning up priming area"
else:
remove_dir = False
message = (
"Cleaning up priming area, but not removing as it's in "
"use by 'snap try'"
)
being_tried = True
finally:
# It does not matter if prime is being tried inside the managed-host
# or not, we cannot delete prime as it is really a mount from the
# outside host.
if project._is_managed_host:
remove_dir = False
message = None
_cleanup_common(
project.prime_dir, steps.PRIME, message, parts, remove_dir=remove_dir
)
if step <= steps.STAGE:
# Remove the staging area.
_cleanup_common(
project.stage_dir, steps.STAGE, "Cleaning up staging area", parts
)
if step <= steps.PULL:
# Remove the parts directory (but leave local plugins alone).
_cleanup_parts_dir(project.parts_dir, project.local_plugins_dir, parts)
if not being_tried and not project._is_managed_host:
_remove_directory_if_empty(project.prime_dir)
_remove_directory_if_empty(project.stage_dir)
_remove_directory_if_empty(project.parts_dir)
def test_mountinfo_by_mount_point(self):
mounts = mountinfo.MountInfo(mountinfo_file=self._write_mountinfo(
dedent("""\
23 28 0:4 / /proc rw,nosuid,nodev,noexec,relatime shared:14 - proc proc rw
1341 28 7:6 / /snap/snapcraft/1 ro,nodev,relatime shared:39 - squashfs /dev/loop6 ro
1455 28 253:0 /test-snap/prime /snap/test-snap/x1 ro,relatime shared:1 - ext4 /dev/mapper/foo rw,errors=remount-ro,data=ordered
"""))) # noqa
mount = mounts.for_mount_point("/proc")
self.assertThat(mount.mount_id, Equals("23"))
self.assertThat(mount.parent_id, Equals("28"))
self.assertThat(mount.st_dev, Equals("0:4"))
self.assertThat(mount.root, Equals("/"))
self.assertThat(mount.mount_point, Equals("/proc"))
self.assertThat(mount.mount_options,
Equals("rw,nosuid,nodev,noexec,relatime"))
self.assertThat(mount.optional_fields, Equals(["shared:14"]))
self.assertThat(mount.filesystem_type, Equals("proc"))
self.assertThat(mount.mount_source, Equals("proc"))
self.assertThat(mount.super_options, Equals("rw"))
mount = mounts.for_mount_point("/snap/snapcraft/1")
self.assertThat(mount.mount_id, Equals("1341"))
self.assertThat(mount.parent_id, Equals("28"))
self.assertThat(mount.st_dev, Equals("7:6"))
self.assertThat(mount.root, Equals("/"))
self.assertThat(mount.mount_point, Equals("/snap/snapcraft/1"))
self.assertThat(mount.mount_options, Equals("ro,nodev,relatime"))
self.assertThat(mount.optional_fields, Equals(["shared:39"]))
self.assertThat(mount.filesystem_type, Equals("squashfs"))
self.assertThat(mount.mount_source, Equals("/dev/loop6"))
self.assertThat(mount.super_options, Equals("ro"))
mount = mounts.for_mount_point("/snap/test-snap/x1")
self.assertThat(mount.mount_id, Equals("1455"))
self.assertThat(mount.parent_id, Equals("28"))
self.assertThat(mount.st_dev, Equals("253:0"))
self.assertThat(mount.root, Equals("/test-snap/prime"))
self.assertThat(mount.mount_point, Equals("/snap/test-snap/x1"))
self.assertThat(mount.mount_options, Equals("ro,relatime"))
self.assertThat(mount.optional_fields, Equals(["shared:1"]))
self.assertThat(mount.filesystem_type, Equals("ext4"))
self.assertThat(mount.mount_source, Equals("/dev/mapper/foo"))
self.assertThat(mount.super_options,
Equals("rw,errors=remount-ro,data=ordered"))
def test_mountinfo_by_root(self):
mounts = mountinfo.MountInfo(mountinfo_file=self._write_mountinfo(
dedent("""\
23 28 0:4 / /proc rw,nosuid,nodev,noexec,relatime shared:14 - proc proc rw
1341 28 7:6 / /snap/snapcraft/1 ro,nodev,relatime shared:39 - squashfs /dev/loop6 ro
1455 28 253:0 /test-snap/prime /snap/test-snap/x1 ro,relatime shared:1 - ext4 /dev/mapper/foo rw,errors=remount-ro,data=ordered
"""))) # noqa
root_mounts = mounts.for_root("/")
for mount_point in ("/proc", "/snap/snapcraft/1"):
self.assertTrue(
any(m for m in root_mounts if m.mount_point == mount_point),
"Expected {!r} to be included in root mounts".format(
mount_point),
)
test_snap_mounts = mounts.for_root("/test-snap/prime")
self.assertThat(test_snap_mounts, HasLength(1))
self.expectThat(test_snap_mounts[0].mount_point,
Equals("/snap/test-snap/x1"))
def test_mountinfo_missing_mount_point(self):
mounts = mountinfo.MountInfo(mountinfo_file=self._write_mountinfo(""))
raised = self.assertRaises(errors.MountPointNotFoundError,
mounts.for_mount_point, "test-root")
self.assertThat(raised.mount_point, Equals("test-root"))
def test_mountinfo_missing_root(self):
mounts = mountinfo.MountInfo(mountinfo_file=self._write_mountinfo(""))
raised = self.assertRaises(errors.RootNotMountedError, mounts.for_root,
"test-root")
self.assertThat(raised.root, Equals("test-root"))