RFR: 8276766: Enable jar and jmod to produce deterministic timestamped content [v4]

[Andrew Leonard]

On Thu, 25 Nov 2021 09:37:59 GMT, Andrew Leonard <aleonard at openjdk.org> wrote:

>> test/jdk/tools/jar/JarEntryTime.java line 129:
>> 
>>> 127:         // Make a jar file from that directory structure with
>>> 128:         // --source-date set to epoch seconds 1647302400 (15/03/2022)
>>> 129:         long sourceDate = 1647302400L;
>> 
>> Please consider  adding a few before Epoch test values.
>
> @LanceAndersen can you clarify your meaning here please? Are you referring to negative sourceDate? I put in the CSR that it was seconds "since" epoch akin to SOURCE_DATE_EPOCH, which as far as I can tell does not support negative values, as some time implementations won't support that. 
> But this does imply I should add some -ve validation checks.

I think we could support -ve values, though i'd need to alter a couple of things

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PR: https://git.openjdk.java.net/jdk/pull/6481