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To: gentoo-java@g.o
From: Alistair Bush <ali_bush@g.o>
Subject: Re: OSGI manifests and existing packages
Date: Thu, 10 Dec 2009 06:58:11 +1300
> Hi,
> 
> Yes first and foremost I want to thank Matt for the awesome work he has put
> into Eclipse while the official maintainer was slacking on it (Matt, that
> would be me...)
> 
> I would be interested in learning all the details of the new ebuild but I
>  am pretty sure that yes it is far better than the current one (which is a
>  good thing; eclipse ebuilds have been constantly improved from the 3.2 one
>  which was horrible, all bundled etc).

Have a look at linuxtools-dev at eclipse.  They are doing a fantastic job and 
are really cleaning up the way eclipse is built.  Believe there is even 
support for running the unit tests.  It uses vnc or something so we maybe able 
to run GUI tests in the ebuilds ( or at least thats the hope ).

> 
> ali_bush, you mention that we currently build against the bundled jars, I
> don't think that's actually true (I would have to double check but I think
> we build against systeme packages...)
> 

Yes I believe the current 3.4.1 ebuild does,  but not 3.5.1. I, at least, I 
can see no indication of it.

> Elvanor
> 
> On Wed, Dec 9, 2009 at 2:51 AM, Alistair Bush <ali_bush@g.o> wrote:
> > Hi guys
> >
> > Please be aware that the work Matt has been doing on eclipse-sdk:3.5
> > means that we no longer have to modify (for 3.5 at least) eclipses
> > dependencies to
> > include osgi headers in the manifest.
> >
> > What happens in eclipse-sdk:3.5 is..
> >
> > Matt Whitlock wrote:
> > > My ebuild does use system-installed packages.  It does this by
> > > unpacking the metadata from the bundled JARs and modifying their
> > > classpaths so
> >
> > they
> >
> > >  point to symlinks to the system-installed JARs.  Look in the
> > >  subdirectories of /usr/lib64/eclipse-3.5/plugins.  As an example, the
> > >  first one, ICU4J, has the following files:
> > >
> > >         META-INF/MANIFEST.MF
> > >         icu4j-charsets.jar -> /usr/share/icu4j-4/lib/icu4j-charsets.jar
> > >         icu4j.jar -> /usr/share/icu4j-4/lib/icu4j.jar
> > >         plugin.properties
> > >
> > > And the META-INF/MANIFEST.MF has this line in it (among others):
> > >
> > >         Bundle-ClassPath: icu4j-charsets.jar,icu4j.jar
> > >
> > > These few metadata files replace the big
> >
> > "com.ibm.icu_4.0.1.v20090822.jar"
> >
> > >  blob that comes bundled with Eclipse.
> >
> > We should continue maintaining these headers until 3.5 is stabilised,
> > once this happens they can be removed.
> >
> > I plan on moving eclipse-sdk:3.5 into the tree this week.  There are some
> > things that I would like to be done.  (see [1]) but I believe that this
> > ebuild
> > is far better than the current one so i'm prepared to compromise.
> >
> > As an example we currently build against bundled jars and then replace
> > them with system jars.
> >
> > If anyone has any objections then please speak up.
> >
> > Thanks
> >
> > Alistair.
> >
> > ps.  Currently I'm singing Matt's praises from the rafters, please join
> > me.
> >
> >
> > [1] https://bugs.gentoo.org/show_bug.cgi?id=296296
> 


References:
OSGI manifests and existing packages
-- Alistair Bush
Re: OSGI manifests and existing packages
-- Jean-Noël Rivasseau
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Updated Mar 06, 2012

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