On POSIX std.file.copy was copying file times at second precision

[n8sh]

No description provided.

[dlang-bot]

Thanks for your pull request, @n8sh!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	20370	normal	On POSIX, std.file.copy only copies the file times at second precision

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "stable + phobos#7629"

[CyberShadow]

It would be nice if this could use the same code as statTimeToStdTime, setTimes etc. to avoid duplication and support more platforms.

[n8sh]

This is to avoid

/home/dtest/DAutoTest/work/tmp/ddoc_preprocessor_062038e10dce4e6eb0a29d181365ced6/std/file.d(1557): Error: cannot implicitly convert expression accessTime.toTimeSpec() of type std.datetime.systime.SysTime.timespec to core.sys.posix.signal.timespec

[n8sh]

std/file.d(1512:6)[warn]: Public declaration 'setTimes' has no documented example.

Moved setTimesImpl after the documented tests to work around a Dscanner limitation but it makes the diff uglier (and IMO makes the source code less readable).