Drop /usr/share/zoneinfo/posix and move /usr/share/zoneinfo/right into tzdata-legacy

[Benjamin Drung]

The tzdata package ships /usr/share/zoneinfo/posix/ (for Coordinated Universal Time) and /usr/share/zoneinfo/right/ (for International Atomic Time). The files in /usr/share/zoneinfo/posix/ are identical to their counterpart in /usr/share/zoneinfo/. The tzdata package converts the
configured posix/* and right/* timezones to their unprefixed variant on every package upgrade (e.g. it changes "posix/Europe/Berlin" to "Europe/Berlin").

Drop /usr/share/zoneinfo/right from tzdata and move /usr/share/zoneinfo/right into separate tzdata-legacy package.

ubuntu-devel discussion: https://lists.ubuntu.com/archives/ubuntu-devel/2023-January/042405.html

Two packages need to be adjusted:

* chrony: reads /usr/share/zoneinfo/right/UTC for leap seconds
* moment-timezone.js: uses /usr/share/zoneinfo/posix/ in debian/rules
* rdate: reads /usr/share/zoneinfo/right/UTC -> depend on tzdata-legacy

Following packages were checked and do not need to be touched:

Only in source code documentation and/or tests suite:

* mariadb
* mariadb-10.6

Copies of tz soure code:

* rust-chrono-tz (in tz)
* udm (in tzdatabase)
* r-cran-tzdb (in inst/tzdata)
* pike8.0 (in lib/modules/Calendar.pmod/tzdata)

Referencing only /usr/share/zoneinfo/posixrules:

* manpages-l10n
* libdatetime-timezone-perl
* asterisk
* mozjs102
* mozjs78
* thunderbird

[Vincent Blut (vinceb)]

Hi Benjamin,

chrony reads "/usr/share/zoneinfo/right/UTC" to determine when will the next leap second occur and what is the current offset between TAI and UTC. So I’ll have to add "tzdata-legacy" to the list of dependencies.

Cheers,
Vincent

[Benjamin Drung (bdrung)]

Hi Vincent, I uploaded chrony 4.3-1ubuntu3 to add the tzdata-legacy a few hours ago.

Note: The leap seconds can also be read from /usr/share/zoneinfo/leap-seconds.list

[Launchpad Janitor (janitor)]

This bug was fixed in the package chrony - 4.3-1ubuntu4

---------------
chrony (4.3-1ubuntu4) lunar; urgency=medium

  * Let upstream-simulation-test-suite depend on tzdata-legacy as well
    (LP: #2008076)

chrony (4.3-1ubuntu3) lunar; urgency=medium

  * Depend on tzdata-legacy for reading leapsectz from
    /usr/share/zoneinfo/right/UTC (LP: #2008076)

 -- Benjamin Drung <email address hidden> Wed, 15 Mar 2023 15:42:10 +0100

[Launchpad Janitor (janitor)]

This bug was fixed in the package tzdata - 2022g-7ubuntu2

---------------
tzdata (2022g-7ubuntu2) lunar; urgency=medium

  * Merge with Debian experimental. Remaining changes:
    - Ship ICU 2022g timezone data which are utilized by PHP in tzdata-icu
    - Do not rename NEWS into changelog.gz, this fixes a build failure on
      moment-timezone.js
    - Point Vcs-Browser/Git to Launchpad
  * Rename new tzdata-right package to tzdata-legacy

tzdata (2022g-7exp1) experimental; urgency=medium

  * Drop /usr/share/zoneinfo/posix (identical to /usr/share/zoneinfo)
    (LP: #2008076)
  * Split right/* timezones into separate tzdata-legacy package (LP: #2008076)

 -- Benjamin Drung <email address hidden> Mon, 13 Mar 2023 15:45:25 +0100

[Launchpad Janitor (janitor)]

This bug was fixed in the package rdate - 1:1.11-3ubuntu1

---------------
rdate (1:1.11-3ubuntu1) lunar; urgency=medium

  * Depend on tzdata-legacy for reading /usr/share/zoneinfo/right/UTC
    (LP: #2008076)

 -- Benjamin Drung <email address hidden> Wed, 15 Mar 2023 08:54:23 +0100

[Launchpad Janitor (janitor)]

This bug was fixed in the package moment-timezone.js - 0.5.40+dfsg-2~ubuntu2+2022g

---------------
moment-timezone.js (0.5.40+dfsg-2~ubuntu2+2022g) lunar; urgency=medium

  * Use files from /usr/share/zoneinfo instead of /usr/share/zoneinfo/posix
    for building (LP: #2008076)

 -- Benjamin Drung <email address hidden> Wed, 15 Mar 2023 10:29:04 +0100