[Bug 1907850] Re: Cache not generated for all translations

[Brian Murray]

Hello Julian, or anyone else affected,

Accepted apt into groovy-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/apt/2.1.10ubuntu0.3 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, what testing has been
performed on the package and change the tag from verification-needed-
groovy to verification-done-groovy. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-groovy. 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: apt (Ubuntu Groovy)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-groovy

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https://bugs.launchpad.net/bugs/1907850

Title:
  Cache not generated for all translations

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  Confirmed
Status in apt source package in Bionic:
  Confirmed
Status in apt source package in Focal:
  Confirmed
Status in apt source package in Groovy:
  Fix Committed
Status in apt source package in Hirsute:
  Fix Released

Bug description:
  [Impact]
  In bug 1161743 we discovered that if a system is configured with multiple locales, only the locales of the user who generated the apt-cache will be available for translated descriptions.

  [Test case]
  An automated test case has been included as a snippet in  test/integration/test-bug-490000-search-in-all-translations which runs during autopkgtest. That's sufficient for validation.

  Manual test:

  # apt install locales-all # get the locale
  # export LANG=sv_SE.UTF-8
  # locale
  LANG=sv_SE.UTF-8
  LANGUAGE=
  LC_CTYPE="sv_SE.UTF-8"
  LC_NUMERIC="sv_SE.UTF-8"
  LC_TIME="sv_SE.UTF-8"
  LC_COLLATE="sv_SE.UTF-8"
  LC_MONETARY="sv_SE.UTF-8"
  LC_MESSAGES="sv_SE.UTF-8"
  LC_PAPER="sv_SE.UTF-8"
  LC_NAME="sv_SE.UTF-8"
  LC_ADDRESS="sv_SE.UTF-8"
  LC_TELEPHONE="sv_SE.UTF-8"
  LC_MEASUREMENT="sv_SE.UTF-8"
  LC_IDENTIFICATION="sv_SE.UTF-8"
  LC_ALL=
  # apt update
  # apt-cache show tasksel | grep Desc
  Description-sv: tool for selecting tasks for installation on Debian systems
  Description-md5: cbbb747708986d11ea77c80b9b038fec
  # apt-cache showpkg tasksel
  Package: tasksel
  Versions:
  3.34ubuntu16 (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_binary-amd64_Packages)
   Description Language:
                   File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_binary-amd64_Packages
                    MD5: cbbb747708986d11ea77c80b9b038fec
   Description Language: sv
                   File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_i18n_Translation-sv
                    MD5: cbbb747708986d11ea77c80b9b038fec
   Description Language: en
                   File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_i18n_Translation-en
                    MD5: cbbb747708986d11ea77c80b9b038fec
  [...]

  So far so good, but now assume the root user actually has C configured
  as locale, and e.g. runs apt-cache show (or apt-daily.service does an
  update):

  root at g:~# rm /var/cache/apt/*.bin
  root at g:~# LANG=C apt-cache  show tasksel
  [...]
  Description-en: tool for selecting tasks for installation on Debian systems
   This package provides 'tasksel', a simple interface for users who
   want to configure their system to perform a specific task.

  root at g:~# apt-cache  showpkg tasksel
  Package: tasksel
  Versions:
  3.34ubuntu16 (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_binary-amd64_Packages)
   Description Language:
                   File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_binary-amd64_Packages
                    MD5: cbbb747708986d11ea77c80b9b038fec
   Description Language: en
                   File: /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_groovy_main_i18n_Translation-en
                    MD5: cbbb747708986d11ea77c80b9b038fec

  This should show the sv locale as well given that it's still around
  (also we are still running with LANG=sv_SE.UTF-8), but it only
  generated the cache with the english language description in here.

  [Where problems could occur]
  People might end up seeing a wrong translation if other code paths are wrong, but then they'd already see them if they explicitly configured multiple languages and then switched the preferred one.

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