[jira] [Created] (MNG-7395) Support system-properties in extension.xml

["Christoph Läubrich (Jira)" <ji...@apache.org>]

Christoph Läubrich created MNG-7395:
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             Summary: Support system-properties in extension.xml
                 Key: MNG-7395
                 URL: https://issues.apache.org/jira/browse/MNG-7395
             Project: Maven
          Issue Type: Improvement
            Reporter: Christoph Läubrich


Currently an entry has to be the following form:

{code:xml}
<extension>
	<groupId>org.eclipse.tycho</groupId>
	<artifactId>tycho-build</artifactId>
	<version>2.7.0-SNAPSHOT</version>
</extension>
{code}

This has the drawback that I always need to edit the extension.xml file and there is no way to specify it on the commandline.

The proposal is to allow the follwoing:

{code:xml}
<extension>
	<groupId>org.eclipse.tycho</groupId>
	<artifactId>tycho-build</artifactId>
	<version>${tycho-version|2.6.0}</version>
</extension>
{code}

I would then expect the following:
# If no systemproperty with name 'tycho-version' exits, the value after the | is used as a default
# If a systemproperty with name 'tycho-version' exits it is used as a version

That way I can call mvn -Dtycho-version=2.7.0-SNAPSHOT clean install to override the default version.




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