[gentoo-soc] Re: Gentoo Maven Integration - Weekly Report #1

[Kasun Gajasinghe]

On Tue, May 31, 2011 at 12:43 PM, kiorky <kiorky@××××××××××.net> wrote:
>
>
> Le 31/05/2011 09:05, Kasun Gajasinghe a écrit :
>> Hello everyone,
>>
>> The goal of this project is to be easily able to write ebuilds for
>> upstream projects that use Apache Maven as the build system. The Maven
>> integration allows to natively use Apache Maven in Java packages in
>> the main tree. The current system work around the support for Maven
>> projects by transforming them to Ant. It generates build.xml via “mvn
>> ant:ant” command and sanitizes that. This conversion too has some
>> problems and needs to fixed. With this project, developers gains the
>> ability to use native Maven support for writing ebuilds and will get
>> full support for using maven-to-ant feature.
>>
>> Progress:
>> * The development is carried out at the gsoc-maven-overlay at [0]
>> * The first step of this project is to bump all the maven related
>> ebuilds. Current ebuilds are around 3 years old. There are about 40
>> ebuilds to bump, so it'll be a little lengthy process.
>>      * Decided to go ahead with Maven 2.x (the latest release is
>> 2.2.1) see [1] for the discussion.
>>      * All the ebuilds related to "maven || wagon || plexus || doxia"
>> needs to be bumped.
>>      * I was trying to bump the plexus-server. It has been a quite a
>> process since some dependencies isn't available anymore.
>>      * Then it turned out that plexus-server is only used by wagon-ftp
>> ebuild. Wagon-ftp needs plexus-ftp which is a sub-project of
>> plexus-server. So, I've been trying to write a new ebuild for the
>> plexus-ftp.
>
> +1, as i said you to go this way
>
>>      * I've wrote the ebuild, but still needs some work to get it into
>> work. There's some issues with pom rewriting. Either the pom file
>> contains some issues or javatoolkit/maven-helper.py-2.6, the script
>> for pom rewriting contains a bug.
>
> Please describe the bug, it may be a feature.

This is the log for emerge -avtp plexus-ftp. I have added the source
tarball to [2].
http://paste.pocoo.org/show/398225/

Log for `emerge --info =dev-java/plexus-ftp-1.0_alpha1`
http://paste.pocoo.org/show/398230/

I'm trying emerging it without any dependencies included. So, it
should actually fail, but not in src_unpack phase.

>
>
>>      * Fixed an issue in the java-maven-2.eclass which caused the
>> build maven-base-poms ebuild to fail.
>
>>      * Got [3] setup to temporily host some source tarballs.
>>
>> Next:
>>      * Getting the plexus-ftp and wagon-ftp ebuilds to work. This
>> process goes through fixing all the DEPEND which will take some time.
>> Once the this got to work, bumping the rest of the ebuilds is just an
>> iterative (and exhausting ;) ) process.
>
> I informed you of that, welcome to my previous work, and at this time even the
> ebuild were not there :p Good luck !

Yeah.. POM contains around 15 dependencies. Though your work of
plexus-server didn't contain any dependencies. I thought it should
have huge deps covering ftp, http etc.! I'll see.

>
>>      * Need to fix the java-maven-2.eclass for the bugs and errors
>> during the course of the bumping process.
> Please be exact on the bugs, it may be features.
> For example, i truncated dependencies in poms.
>
>
>>      * The ultimate goal is to get building maven from source fully
>> working/bootstrapping maven.
>
> We agree
>
>>
>> Questions:
>>      * Need to figure out what DEPENDs should be included for maven
>> based ebuilds. Does all the artifacts in the <dependencies> in the POM
>> needed to be included?
>
> Its the ones you remove from the eclass you didnt say me why on irc.

It isn't. I only removed "source? ( app-arch/zip )"  from DEPEND
because it caused a build failure on maven-base-poms. I thought I made
aware of it!
My above question was about  the need of including all the articfacts
in the DEPEND of the particular ebuild.
The changeset: http://overlays.gentoo.org/proj/java/changeset/8382/gsoc-maven-overlay/eclass/java-maven-2.eclass

>
>>      * In addition to patching build.xml generated from `mvn ant:ant`,
>> Is there any other changes needs to be done to the source?
>
> I remember truncate some dependency informations in poms not for maven when it
> will run for other projects to download externally stuff.
> Maven for system as emerging an ebuild with maven as the project builder will
> use system jars in 99% of cases, and the pom of the project needs to be
> rewritter so, to exclude version & some depenencies stuff not for it to download
> from the internet.

OK. I willl look at the maven-helper py script. Though I've no prior
experience with python hope this'll go well.

>
> For the user experience, maven will behave as noramally, downloading stuff from
> the internet, system stuff is just for system.
>
>
>>
>>
>> [0] http://overlays.gentoo.org/proj/java/log/gsoc-maven-overlay
>> [1] http://comments.gmane.org/gmane.linux.gentoo.java/2161

 [2] http://dev.gentooexperimental.org/~kasun/

>>
>> Thanks,
>> --Kasun
>>
>
> --
> Cordialement,
> KiOrKY
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>
>



-- 
~~~*******'''''''''''''*******~~~
Kasun Gajasinghe,
University of Moratuwa,
Sri Lanka.
Blog: http://kasunbg.blogspot.com
Twitter: http://twitter.com/kasunbg