[swift-corelibs-dev] TimeZone database

[Ian Partridge]

I've only poked this briefly, but it looks like
CFCopySystemVersionString() might give the info we'd need?

On 6 July 2017 at 16:28, Tony Parker <anthony.parker at apple.com> wrote:
> 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
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> --
> Ian Partridge
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-- 
Ian Partridge