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Message-ID: <ae03024e0703090014nd3dce42v1c04bbfdf0a6fbf6@mail.gmail.com>
Date: Fri, 9 Mar 2007 09:14:49 +0100
From: "Felix Meschberger" <Felix.Meschberger@day.com>
Sender: fmeschbe@gmail.com
To: felix-dev@incubator.apache.org
Subject: Re: maven-bundle-plugin, wrapping and excludeTransitive
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Hi Michael,

Transitive dependencies are a great thing and huge plus for Maven 2 over
Maven 1. On the other hand, if not judiciosly configured, transitive
dependencies may quickly evolve to a huge pile of libraries being packed
when using packing plugins like the maven-bundle-plugin (as well as the war
plugin for that matter).

In this sense, and as the OSGi bundleing should really only package the
contents of specific libraries, I think an option to the maven-bundle-plugi=
n
to ignore transitive dependencies would probably make sense.

So you have all advantages on your side: you package only what you
explicitly declare but maven projects do not loose transitive dependencies.

Regards
Felix

On 3/9/07, Hampel, Michael <michael.hampel@siemens.com> wrote:
>
>
> Hello Alin,
>
> I don't understand why you would have to exclude the dependencies - as fa=
r
> as I
> Understood the maven-bundle plugin is not doing anything with the maven
> dependencies.
> If the dependencies are excluded (like in the hibernate osgi pom) and I
> add the hibernate
> Osgi jar as a dependency to my project, I would loose the transitive
> capability of maven as the
> Transitive dependencies of hibernate are not added anymore, e.g.: when
> doing eclipse:eclipse.
> On the other side it makes sense to exclude the dependencies, because I
> also will have to wrap the
> Hibernate dependencies to become osgi bundles - so the jta dependencies
> will change to a jta-osgi dependency....
> Does this mean I have to forget about maven's transitive capabilites?
>
> Maybe I am thinking completely wrong here - but probably you could shed
> some light,
>
> Thanx,
>
> Michael
>
>
>
>
>
>
> -----Urspr=FCngliche Nachricht-----
> Von: Alin Dreghiciu [mailto:adreghiciu@gmail.com]
> Gesendet: Donnerstag, 08. M=E4rz 2007 14:18
> An: felix-dev@incubator.apache.org
> Betreff: maven-bundle-plugin, wrapping and excludeTransitive
>
> About jar wrapping:
>
> Most of the time (at least in the cases I had) you would like to wrap onl=
y
> the content of the jar you are targeting and not also the transitive
> dependencies that the targeted jar has. You can do this in at least two
> ways:
> 1. add <exclusions> to the dependency. This is verbose for the case that
> the
> targeted jar has extensive dependencies and irrelevant to the process of
> wrapping
> 2. set the Export-package directive  to export only those packages that
> you
> want. here you have to know the internals of the package and if the jar
> has
> some resources as licences, xmls' outside the main package you have to ad=
d
> them one by one.
>
> So, here I am proposing a new configuration option: excludeTransitive tha=
t
> is suppose to exclude the transitive artifacts if set to true.
>
> An example implementation can be found at the following location:
>
> http://maven.apache.org/plugins/maven-dependency-plugin/xref/org/apache/m=
aven/plugin/dependency/utils/filters/TransitivityFilter.html
>
> Alin Dreghiciu
>
> PS. Maven does not support a property of the articat as isTransitive()
>
> <
> http://maven.apache.org/plugins/maven-dependency-plugin/xref/org/apache/m=
aven/plugin/dependency/utils/filters/TransitivityFilter.html
> >
>

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