[Bug 1599646] Re: E-mail report contains repeated "Reading database ... NN%" lines

[Łukasz Zemczak]

Hello Daniel, or anyone else affected,

Accepted unattended-upgrades into cosmic-proposed. The package will
build now and be available at https://launchpad.net/ubuntu/+source
/unattended-upgrades/1.5ubuntu3.18.10.2 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-cosmic to verification-done-cosmic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-cosmic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: unattended-upgrades (Ubuntu Cosmic)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-cosmic

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https://bugs.launchpad.net/bugs/1599646

Title:
  E-mail report contains repeated "Reading database ... NN%" lines

Status in unattended-upgrades package in Ubuntu:
  Fix Released
Status in unattended-upgrades source package in Bionic:
  Fix Committed
Status in unattended-upgrades source package in Cosmic:
  Fix Committed
Status in apt package in Debian:
  New

Bug description:
  [Impact]

   * Unattended-upgrades sends the following repeating dpkg progress lines with almost no informational value in the email report:
  ...
   (Reading database ...
   (Reading database ... 5%
   (Reading database ... 10%
   (Reading database ... 15%
   (Reading database ... 20%
   (Reading database ... 25%
   (Reading database ... 30%
   (Reading database ... 35%
   (Reading database ... 40%
   (Reading database ... 45%
   (Reading database ... 50%
   (Reading database ... 55%
   (Reading database ... 60%
   (Reading database ... 65%
   (Reading database ... 70%
   (Reading database ... 75%
   (Reading database ... 80%
   (Reading database ... 85%
   (Reading database ... 90%
   (Reading database ... 95%
  (Reading database ... 60486 files and directories currently installed.)
  ...

   * This makes the report email too verbose and makes harder to spot
  real problems.

  [Test Case]

   * Run package autopkgtest and observe no such lines in the echoed
  email in upgrade-all-security and upgrade-between-snapshots tests.

  [Regression Potential]

   * The fix filters dpkg's output only and in the worst case other
  lines could be missing or u-u could crash. Since the applied hard-
  coded regex pattern is fairly simple and we observed no crashes in the
  tests those regressions are unlikey to occur.

  [Originial Bug Text]

  This concerns unattended-upgrades 0.90 in Xenial.

  Here is an excerpt from an e-mail report sent out by u-u after the
  upgrade process is completed:

   Package installation log:
   Log started: 2016-07-06  17:24:21
   Preconfiguring packages ...
   (Reading database ...
   (Reading database ... 5%
   (Reading database ... 10%
   (Reading database ... 15%
   (Reading database ... 20%
   (Reading database ... 25%
   (Reading database ... 30%
   (Reading database ... 35%
   (Reading database ... 40%
   (Reading database ... 45%
   (Reading database ... 50%
   (Reading database ... 55%
   (Reading database ... 60%
   (Reading database ... 65%
   (Reading database ... 70%
   (Reading database ... 75%
   (Reading database ... 80%
   (Reading database ... 85%
   (Reading database ... 90%
   (Reading database ... 95%
   (Reading database ... 100%
   (Reading database ... 314949 files and directories currently installed.)
   Preparing to unpack .../tzdata_2016f-0ubuntu0.16.04_all.deb ...
   Unpacking tzdata (2016f-0ubuntu0.16.04) over (2016d-0ubuntu0.16.04) ...
   Preparing to unpack .../libgimp2.0_2.8.16-1ubuntu1.1_i386.deb ...

  All but the last "Reading database ..." line should be elided from the
  message.

  As a matter of fact, those lines do not appear in messages mailed out
  from current Trusty systems (u-u version 0.82.1ubuntu2.4), so this
  appears to be a regression.

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