Horton

Re: More tzdb fun: POSIXRULES is being deprecated upstream

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2020-06-19T20:49:23Z
Lists: pgsql-hackers 
I wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> It might be nice to know what
>> Debian, RHEL, etc. plan to do about this, but I'm not sure how
>> practical it is to find out.

> There's probably no way to know until it happens :-(.

On the other hand, for the open-source players, it might be easier to
guess.  I took a look at the Fedora/RHEL tzdata specfile, and I see
that "-p America/New_York" is hard-wired into it:

zic -y ./yearistype -d zoneinfo -L /dev/null -p America/New_York $FILES

This means that IANA's change of their sample Makefile will have no
direct impact, and things will only change if the Red Hat packager
actively changes the specfile.  It's still anyone's guess whether
he/she will do so, but the odds of a change seem a good bit lower
than if the IANA-supplied Makefile were being used directly.

I'm less familiar with Debian so I won't venture to dig into their
package, but maybe somebody else would like to.

			regards, tom lane

Commits

  1. Remove support for timezone "posixrules" file.

  2. Future-proof regression tests against possibly-missing posixrules file.

  3. Doc: document POSIX-style time zone specifications in full.

  4. Please find attached diffs for documentation and simple regression