Improve $OPT on current EA builds

[Magnus Ihse Bursie]

On 2015-12-27 11:21, Michael Osipov wrote:
> Hi folks,
>
> just tried Java 9 build 99 and noticed that $OPT of JEP 223 is not 
> easily parseable/not a valid ISO date:
>
> java --version
>> Java(TM) SE Runtime Environment (build 
>> 9-ea+99-2015-12-23-183325.javare.4146.nc)
>
> Can you kindly file an issue to make that a proper basic ISO datetime 
> string? Date format would be here yyyyMMdd'T'HHmmss'Z' with timezone 
> Etc/UTC as in DateTimeFormatter#basicDateTimeNoMillis.
Michael,

The OPT string is a free-form string, the contents of which are not 
specified in JEP 223.

If a user-specified opt string is not specified, the build system makes 
up a default opt string. This uses some heuristics to form a 
more-or-less unique string, based on the current time, user name and 
base directory name. However, you should not rely on the opt string to 
really *mean* something. If you want to pass a date string with a 
specific format for use in your internal processes, please use the 
--with-version-opt argument to configure.

/Magnus