Re: [p2-dev] Is it possible to declare that a feature depends on a parti

[Mickael Istria <mistria@xxxxxxxxxx>]

Hi,

Things are supposed to work as you expect and installing an IU with req 17 on a profile that runs on req 11 should fail in the UI.

> But that doesn't help, alas, as my Tycho-generated update site offers, among other things, also a.jre.javase IUs.

Those a.jre.javase units are supposed to be ignored when installing from UI (unless the corresponding preference is disabled), please see https://bugs.eclipse.org/bugs/show_bug.cgi?id=483383 and https://github.com/eclipse-equinox/p2/commit/535cf0ec5a3b6275050e601883bd3db140bf0b97 .

Cheers,

Mickael

On Thu, Nov 6, 2025 at 8:10 PM Andreas Sewe via p2-dev <p2-dev@xxxxxxxxxxx> wrote:

Hi P2 Developers,

I have a plug-in (build using Tycho) whose
Bundle-RequiredExecutionEnvironment needs to be bumped from JavaSE-11 to
(finally!) JavaSE-17. Alas, I am struggling a bit with the update's UX:

Someone still running the Eclipse platform on Java 11, can happily
performs an (auto)-update of the feature, only to see the feature's
bundles failing to resolve. And this just means that all UI
contributions are missing, with no indication why.

How can I get p2 to provide a reasonable error message already during
*installation*, along the lines of "Missing requirement to execution
environmnt: JavaSE-17" or so.

So far, I've tried the following in my feature.xml, using the magic
"a.jre.javase" IU (not sure whether this is a p2 or Tycho concept, BTW):

> <requires>
>    <import plugin="a.jre.javase" version="17" match="greaterOrEqual"/>
> </requires>

But that doesn't help, alas, as my Tycho-generated update site offers,
among other things, also a.jre.javase IUs. Hence, I assume these IUs are
really not meant to represent an actual installed execution environment
-- which you certainly cannot get from my update site -- but something
subtly different.

Is what I am after possible at all (similar to limiting a feature's
supported operating systems or architectures)? Perhaps with a magic
p2.inf incantation?

Any help would be greatly appreciated.

Best wishes,

Andreas

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Mickael Istria

Eclipse IDE developer, for Red Hat