Comment 0 for bug 1644625

This is a new version of snapd.

The changelog for 2.18 is available here https://github.com/snapcore/snapd/blob/2.18/debian/changelog, the raw git changelog is available here: https://github.com/snapcore/snapd/commits/2.18 (note that the debian changelog is auto-generated from the merges of the git commits so there is usually no need to look at the raw git commits).

The snappy team released a new 2.18 micro release that we want SRU into xenial. The new process described in https://wiki.ubuntu.com/SnapdUpdates was used and we have done integration-tests on the snappy images, autopkgtests on classic and unit tests.

The following automatic tests are run:
- travis unit tests https://travis-ci.org/snapcore/snapd/branches (check for 2.18 here)
- travis/spread based integration/system tests: https://travis-ci.org/snapcore/snapd/branches (check for 2.18 here under "spread")

The following additional tests were performed:
"""
$ adt-run -s -U snapd_2.18.dsc --- qemu ~/VM/adt-xenial-amd64-cloud.img
[lots of output, wait 45min]
2016/09/28 11:51:57 Restoring autopkgtest:ubuntu-16.04-64:tests/upgrade/...
2016/09/28 11:52:00 Discarding autopkgtest:ubuntu-16.04-64...
2016/09/28 11:52:01 Successful tasks: 88
2016/09/28 11:52:01 Aborted tasks: 0
adt-run [11:52:01]: test integrationtests: -----------------------]
adt-run [11:52:02]: test integrationtests: - - - - - - - - - - results - - - - - - - - - -
integrationtests PASS
adt-run [11:52:03]: @@@@@@@@@@@@@@@@@@@@ summary
integrationtests PASS

$ adt-run -s -U snapd_2.18.dsc --- qemu ~/VM/adt-yakkety-amd64-cloud.img
[lots of output, wait 45min]
2016/09/28 12:09:09 Restoring autopkgtest:ubuntu-16.04-64:tests/upgrade/...
2016/09/28 12:09:12 Discarding autopkgtest:ubuntu-16.04-64...
2016/09/28 12:09:12 Successful tasks: 88
2016/09/28 12:09:12 Aborted tasks: 0
adt-run [12:09:13]: test integrationtests: -----------------------]
adt-run [12:09:14]: test integrationtests: - - - - - - - - - - results - - - - - - - - - -
integrationtests PASS
adt-run [12:09:14]: @@@@@@@@@@@@@@@@@@@@ summary
integrationtests PASS

"""
Almost all of our spread integration tests are now run as part of the autopkgtest run.

After installing the new snapd it was ensured that apt is unaffected by doing:
"""
- sudo apt install -y hello && sudo apt remove -y hello
"""

After installing the new snapd gnome-software was used:
"""
- install "http" (snap) and remove it again
"""
All worked as expected.