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Re: Cobertura Maven Plug-in Status

by Stevo Slavic :: Rate this Message:

Parent project could create initial empty cobertura.ser file, children modules could merge their coverage data into it. Question is how to get parent (aggregator module) to have report generated at the end of the whole build.

If such scenario is not naturally supported in Maven2, maybe a workaround would be to have plugin when executing report mojo for parent project actually just register a JVM shutdown hook (similarly to Cobertura) and generate report when Maven build successfully ends (if build fails, coverage report doesn't mean much anyway). This assumes that report generation will not fail, and if it does it won't fail a build (IMO just warning/error log feedback will suffice). Also, it assumes that plugin will, before registering shutdown hook, obtain and save reference for later to all necessary info needed for report generation so that generation doesn't fail because build has ended.

Regards,
Stevo.

2009/4/29 Stephen Connolly <stephen.alan.connolly@...>

2009/4/29 Stevo Slavić <sslavic@...>
I've asked because there seems to be a number of more or less important issues, very small number of issues has been resolved in last year, even tho at least some of the issues have high vote count and/or have patches from the community, like this one I'm currently most interested in where I'm proposing a new cobertura:report-only mojo to be added - currentl one can generate report only through cobertura:cobertura mojo which executes test phase in cobertura lifecycle so tests in integration-test phase do not get run; with cobertura:report-only mojo user has responsibility to instrument code and execute tests in whichever phase (s)he chooses.

About aggregating coverage results in a multimodule project, isn't it enough to
resolve this very long standing issue, by implementing support for cobertura:merge mojo & task;

have users configure cobertura:instrument mojo at parent and thus inherited by every child;
implement some new cobertura:aggregate report mojo which would (like report-only mojo bind to validate phase and) just call merge task before generating report for a parent project only?

You think this is the solution... but whe you try to roll a release, in the release:perform stage, either the aggregator parent module runs first, and there's no results to include, or it runs last (in which case it cannot be the parent and you have to put the config all over the place)...

the clover solution is to fork the build... but that just makes matters worse with everyone forking the build and a forked build only removing the forking plugin from the lifecycle and not removing any previous plugins that forked the build...

end result is that if you have N modules, you run the unit tests approx 2*N*(N-1) times at least... more if you have another plugin that forks the build... more still if you have a depth > 1

-Stephen

Regards,
Stevo.

2009/4/29 Stephen Connolly <stephen.alan.connolly@...>

My understanding is that there is an issue with aggregating coverage results for a multi-module project and forking the build...

Clover faces the same issue but is farther down the road, and it looks like there is no good solution for Maven 2.x (i.e. need the build plan stuff from 3.x)

The Cobertura plugin seems to work fine otherwise, why would it need a new release?

-Stephen

2009/4/29 Stevo Slavić <sslavic@...>

Hello Codehaus Mojo Users,

Are there any active Cobertura Maven Plug-in developers? Project appears to be dead...

Regards,
Stevo.

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