Re: [eclemma-dev] P2 metadata for smooth transition for users

[Lars Vogel <lars.vogel@xxxxxxxxxxx>]

Hi,

maybe you should ask that on the p2 mailing list? I'm also not an p2
metadata master.

Best regards, Lars

On Fri, Sep 2, 2016 at 8:51 PM, Evgeny Mandrikov <mandrikov@xxxxxxxxx> wrote:
> Hi guys,
>
> First I'd like to let you know about progress: now we have automatic signing
> and publishing done by https://hudson.eclipse.org/eclemma/ to
> http://download.eclipse.org/eclemma/
>
> And so I started work on subject of this email based on
> https://github.com/eclipse/m2e.wtp/blob/master/org.eclipse.m2e.wtp.feature/p2.inf
> as a reference. But must admit that I'm not fluent in tuning of P2 metadata.
> Even if this could magically "just work", I'm not in favor of doing
> modifications that can't explain, so below is p2.inf with some guesses based
> on meager info I could find:
>
> # can update any "com.mountainminds.eclemma.feature" and previous versions
> of "org.eclipse.eclemma.feature"
> update.matchExp = providedCapabilities.exists(pc | pc.namespace \=\=
> 'org.eclipse.equinox.p2.iu' && (pc.name \=\=
> 'com.mountainminds.eclemma.feature.feature.group' || pc.name \=\=
> 'org.eclipse.eclemma.feature.feature.group' && pc.version < '$version$'))
>
> # requires additional IU described below
> requires.0.namespace=osgi.bundle
> requires.0.name=com.mountainminds.eclemma
> requires.0.range=[$version$, $version$]
>
> units.1.id=com.mountainminds.eclemma
> units.1.version=$version$
> units.1.singleton=true
> units.1.provides.0.namespace=osgi.bundle
> units.1.provides.0.name=com.mountainminds.eclemma
> units.1.provides.0.version=$version$
>
> # to not overwrite the main artifact, the additional IU should have
> classifier (https://bugs.eclipse.org/bugs/show_bug.cgi?id=430728)
> units.1.properties.1.name=maven-classifier
> units.1.properties.1.value=p2inf
>
> # TODO explain
> units.1.properties.0.name=org.eclipse.equinox.p2.name
> units.1.properties.0.value=This version cannot be installed on top of the
> already installed EclEmma plugin. Uninstall the previous version and try the
> install again.
>
> Could you please help me to understand last property and confirm/deny
> guesses?
>
> Thanks.
>
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