Review request 8136930: Simplify use of module-system options by custom launchers

[Alan Bateman]

On 05/08/2016 21:11, Mandy Chung wrote:

> This patch renames the module-system options to GNU-style as specified
> in JEP 293 [1] (see below for the new proposed option names).  This
> addresses the problems discussed in [2] that the launcher will pass
> the module-system options down to the VM in the form of <option>=<value>.
> This provides a consistent way to configure the module system and
> simplify use of module-system options by custom launcher.  This patch
> also updates several JDK tools including jlink, jmod, jimage, jar,
> javac, javap, javadoc, javah, jdeps such that the GNU-style
> module-system options are consistent across all tools.
>
> Webrev:
>   http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8136930/gnu-options/webrev.00/
>
One thing to check is java.c L1299 where it should have failed if 
has_arg is false (0). Also since the initial module/class is being set 
here then maybe we should have -jar pick up the next arg rather than 
having two different ways to set pwhat.

launcher.properties. I wonder if "This option can be specified more than 
once" should be clearer than it can be used more than once with 
different module/packages. Alternatively maybe it should be just dropped 
from the usage output if the text ends up too wordy.

In javap.properties then there is a typo in "instead whitespace" 
(missing "of"). Also probably best to say a "file URL" instead of "URL" 
as I don't think it accepts an arbitrary URL.

I don't have any other comments, overall it's looking very good.

-Alan