Stefan Egli created FELIX-4246:
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Summary: maven-scr-plugin 1.14 deletes scr descriptor .xml files
on subsequent (incremental) eclipse build
Key: FELIX-4246
URL: https://issues.apache.org/jira/browse/FELIX-4246
Project: Felix
Issue Type: Bug
Components: Maven SCR Plugin
Affects Versions: maven-scr-plugin 1.14.0
Environment: Eclipse, m2eclipse
Reporter: Stefan Egli
There's a regression bug introduced in maven-scr-plugin 1.14.0 which *worked
fine in 1.13.0*. Consider the following scenario:
* a project is setup in eclipse/m2eclipse using the maven-scr-plugin 1.14.0
and contains java classes annotated with @Service and/or @Components
* the project is cleaned ('clean project') and built ('build project')
-> the descriptor .xml files are created as expected
* when the project is built again (incrementally, eg manually triggering
another 'build project'), the descriptor .xml files are deleted
Some debugging narrows the problem down to the
MavenProjectScanner.getSourcesForScanKind, where the buildContext.newScanner is
invoked. The scanner returned there is of type EclipseBuildContext (set by
m2eclipse) when doing a build right after a clean - and in this case the
scanner finds java files, sets those via project.setSources and
MetaTypeIO.generateDescriptors correctly generates the descriptors.
In the incremental(-eclipse)-build case though, the buildContext.newScanner
returns an EclipseIncrementalBuildContext - which results in an empty set of
sources being passed to project.setScanner, hence later down the call-stack
MetaTypeIO.generateDescriptors gets an empty list of components, thus *thinks
it's a good idea to go through the metatype directory and delete 'obsolete'
metatype files* - when in fact they are not quite obsolete..
Maybe it would be better to hook into the 'clean' method for deleting/cleaning
up?
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