Issue while creating eclipse p2 repository using maven tycho plugin - maven

Question

Project structure
com.abc.parent - parent pom
Contains all the plugins required for the modules. And the module execution list.
com.abc.p2 - master P2 project - eclipse repository
Contains the category.xml file with the information related to the below mentioned eclipse plugins.
com.abc.common - eclipse plugin
com.abc.person - eclipse plugin
What we want to achieve
We are introducing Maven for the first time for these project . We want to create a P2 repository using Maven ( mostly by using maven tycho plugin or any other standard available plugins ). Also , we wish to publish this repository to a site location.
What we tried until now
Case 1:
Approach - We used Maven Tycho plugin and added the packaging as "eclipse-repository" for the com.abc.p2 project.
We have following plugins in the pom.xml files
We are using Maven tycho plugin with version - 0.24.0
Maven tycho plugin. maven-p2-repository , tycho-packaging plugin , maven-osgi-plugin
Errors -
[ERROR] Unknown packaging: eclipse-repository # line 6, column 14
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e swit
ch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please rea
d the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildin
gException
Case 2 :
Approach - We used Maven-p2-plugin in order to create P2 repository .
Errors -
We were able to generate the P2-repository structure in the target folder of the master project, , but it failed to package all the dependent modules in the p2-repository.
Next steps suggestions
Request you to kindly assist and suggest , if we are on the right track in order to achieve our goal . Also let me know in case any changes required to my approach and any more additional things to be implemented.

Answer 1

For tycho to work you need an extensions.xml file in a .mvn folder in the root of your project (where the root pom.xml is) with the following contents:
<extensions>
<extension>
<groupId>org.eclipse.tycho.extras</groupId>
<artifactId>tycho-pomless</artifactId>
<version>0.26.0</version>
</extension></extensions>
As you can see in the excellent Vogella tutorial

Answer 2

I would suggest using the tycho-p2-repository plugin.
In case 1, the maven repository plugin does not know the packaging "eclipse-repository" as that packaging is defined by tycho. I suggest simply leaving the maven-packaging plugin out of your pom and let tycho apply its defaults.
One helpful tip: Tycho does not include all dependencies, even though that's normal and desired maven behaviour. As maven does not "see" tycho (so manifest-derived) dependencies, they are not included.
You can override this behaviour by setting to true:
<plugin>
<groupId>org.eclipse.tycho</groupId>
<artifactId>tycho-p2-repository-plugin</artifactId>
<version>${tycho-version}</version>
<configuration>
<includeAllDependencies>true</includeAllDependencies>
</configuration>
</plugin>