RFR: 8189102: All tools should support -?, -h and --help

Jonathan Gibbons jonathan.gibbons at oracle.com
Sun Nov 19 18:12:17 UTC 2017

We are already in a hybrid world of old-style and new-style options :-(

All the new module-related options added in JDK 9 are "new style", 
following the guidelines of JEP 293.

It does not make sense to add "--" to some of the older tools, that may 
be going away at some point, and while we may be able to add the ability 
for other tools to accept "--" options, we have to be careful about 
removing support for existing options.

-- Jon

On 11/18/17 4:28 PM, Weijun Wang wrote:
> I am OK with all commands supporting --help, but I am not sure if every tool should show it on the help screen if the tools's other options are still using the old single-"-" style. It looks like the tools are half-converted.
> Is there a timetable to add "--" support to all tools?
> Thanks
> Max
>> On Nov 17, 2017, at 7:23 PM, Lindenmaier, Goetz <goetz.lindenmaier at sap.com> wrote:
>> Hi,
>> please review this change. I also filed a CSR for this:
>> http://cr.openjdk.java.net/~goetz/wr17/8189102-helpMessage/webrev.02/
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8189102
>> CSR: https://bugs.openjdk.java.net/browse/JDK-8191477
>> See the webrev for a detailed description of the changes.
>> If required, I'll make break-out changes to be reviewed separately.
>> I had posted a RFR before, but improved the change to
>> give a more complete overview of currently supported flags
>> for the CSR:
>> http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-October/028615.html
>> Best regards,
>>   Goetz.

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