[swift-corelibs-dev] TimeZone database

[Youming Lin]

We were seeing this on Travis too. Specifically, on a Travis matrix build
using Swift 3.1.1 on a Ubuntu 16.04 docker image running inside a Travis
14.04 VM.

The issue was specific to the Ubuntu 16.04 docker image; when I tested in
Ubuntu 16.04 OS as a guest VM, the issue went away.

Thanks,

Youming Lin
IBM Cloud, Swift at IBM, Kitura developer
Austin, TX
GitHub: @youming-lin



From:	Tony Parker via swift-corelibs-dev
            <swift-corelibs-dev at swift.org>
To:	Ian Partridge <ian at poncho.org.uk>
Cc:	swift-corelibs-dev <swift-corelibs-dev at swift.org>
Date:	07/06/2017 10:31 AM
Subject:	Re: [swift-corelibs-dev] TimeZone database
Sent by:	swift-corelibs-dev-bounces at swift.org



Yes, we’re discussing this one internally too and trying to figure out what
the right answer is. Maybe the best solution for now is to find a good
mechanism to check the underlying version of the OS and split it out into a
function as you suggest.

- Tony

      On Jul 6, 2017, at 7:37 AM, Ian Partridge via swift-corelibs-dev <
      swift-corelibs-dev at swift.org> wrote:

      Good shout Simon, you are right.  I'm on Sierra.  Compare and
      contrast:

      /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/tzfile.h

      #define TZDIR   "/usr/share/zoneinfo"

      /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/tzfile.h

      #define TZDIR   "/var/db/timezone/zoneinfo"

      so I guess if I installed the High Sierra beta it would work OK.

      I hacked CF to force it to use /usr/share/zoneinfo and TestFoundation
      is much happier, but that's not a solution.

      On 6 July 2017 at 15:20, Simon Evans <si at si.org> wrote:
            Ian

            I also saw this error, I think its because the TZDIR is
            different in the headers shipped with Xcode 9. Maybe the
            location of the timezone directory was moved between Sierra and
            High Sierra. What version of macOS are you testing on?

            If it has indeed moved between 10.12 and 10.13 it may require a
            runtime version check to dynamically return TZDIR.

            Simon


                  On 6 Jul 2017, at 15:09, Ian Partridge via
                  swift-corelibs-dev <swift-corelibs-dev at swift.org> wrote:

                  Hi,

                  I'm seeing quite a lot of tests failing when running the
                  TestFoundation target in Xcode.  The failures are
                  timezone related.
                  Most simply, the code

                  let timeZone = TimeZone(abbreviation: "GMT")

                  is returning nil.

                  Walking through the CF code which sets things up, it
                  seems to be
                  trying to read the timezone database from
                  /var/db/timezone/zoneinfo/zone.tab which doesn't exist on
                  my macOS
                  system.

                  /usr/share/zoneinfo/zone.tab is there and seems to be the
                  right
                  location (?), but CF is picking up TZDIR from tzfile.h
                  which says:

                  #define TZDIR   "/var/db/timezone/zoneinfo"

                  Any thoughts?  I feel like I'm missing something obvious
                  and have gone
                  too far down the rabbit hole.

                  --
                  Ian Partridge
                  _______________________________________________
                  swift-corelibs-dev mailing list
                  swift-corelibs-dev at swift.org
                  https://lists.swift.org/mailman/listinfo/swift-corelibs-dev




      --
      Ian Partridge
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