Hi,
The JDK 9 jar packager comes with 2 extra options: main-class and
module-version.
The first one is used in case of an executable modular jar, the latter is
just for display/analysis to show which version of a specific module is
used.
To support these 2 values, the module-info.class must be adjusted (yes,
the bytecode!).
It is not that hard to support this as well with a little help from ASM,
but the question is: which plugin should do this: maven-jar-plugin or
maven-shade-plugin?
If you consider this kind of information to be part of the packaging
process, maven-jar-plugin seems to be the best fit.
However, if you consider this as a resource transformation, then
maven-shade-plugin seems better.
Personally I think packaging should be quite a stupid action: making a jar
from a set of files. And it should be very reliable, since it is part of
the lifecycle of the most used packaging type. Of course you can control
this when exposed as parameters...
Or should these extra (basic?) features require an extra setup of a
maven-plugin so all transformations are done by one plugin only.
WDYT?
Robert
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