Throw validation error upon multiple repository declarations with the same id
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Key: MNG-4193
URL: http://jira.codehaus.org/browse/MNG-4193
Project: Maven 2
Issue Type: Improvement
Components: POM
Affects Versions: 3.0-alpha-1
Reporter: Benjamin Bentmann
Priority: Minor
Within the same POM, we should be more strict with regard to the uniqueness of
identifiers. For instance
{code:xml}
<repositories>
<repository>
<id>one</id>
<url>http://repo1.maven.org/maven2</url>
</repository>
<repository>
<id>one</id>
<url>http://repository.codehaus.org/</url>
</repository>
</repositories>
{code}
is currently considered valid. However, this usually results from copy&paste
errors and the missing uniqueness makes it unnecessary complicated to define
Maven's behavior during inheritance or profile injection when we want to merge
elements with the same id.
Of course, this extended validation must only apply to local builds and not to
the metadata retrieval.
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