I'm using the maven clover2 pluging, version 3.0.5, and I'm having issues invoking clover2:aggregate. If I do chagne the name/locatio of the clover database, I'm successfull in executing clover2:aggregate. The minute I change it to something other than the default, I get "No Clover databases found in children projects - No merge done"
Is there a bug in the aggregate goal if you change the location or name of the database file?
"No Clover databases found in children projects - No merge done"
This message typically occurs when you have clover2:aggregate goal defined in pom.xml. For example a following definition is incorrect for multi-module projects:
<plugin> <groupId>com.atlassian.maven.plugins</groupId> <artifactId>maven-clover2-plugin</artifactId> <executions> <execution> <phase>verify</phase> <goals> <goal>instrument</goal> <goal>aggregate</goal> <goal>clover</goal> </goals> </execution> </executions> </plugin>
Instead of this you should call aggregate goal in mvn commandline, for example this is correct:
mvn clean clover2:setup verify clover2:aggregate clover2:clover
Maven starts building projects from top-level module, going through all phases, next it starts to build sub-modules (again going through all phases) one after another. As a result, when you have clover2:aggregate bound in top-level pom.xml to some build phase (like 'verify' in my example), Maven will come to aggregate goal in top-level module and fail, because sub-modules were not built yet and there are no databases availalble.
In case when you declare phases/goals in command line, Maven will execute first declared phase (for example, building all modules), next execute second phase etc... So in my correct example it will: clean all modules, setup Clover, build and test all modules, aggregate results, generate report.
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