parent pom lookup in reactor

[Mike Wilson <mi...@hotmail.com>]

As of Maven 3 parent POMs are no longer searched for in the 
reactor. The advantage given in [1] doesn't seem to outweigh 
the disadvantages for the user of Maven.

I'd like to understand more about the motivations behind this 
change. Are there any pointers to previous discussion?

Thanks
Mike Wilson

[1]
https://cwiki.apache.org/MAVEN/maven-3x-compatibility-notes.html#Maven3.xCom
patibilityNotes-ParentPOMResolution


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Re: parent pom lookup in reactor

[Karl Heinz Marbaise <kh...@gmx.de>]

Hi Mike,

 > As of Maven 3 parent POMs are no longer searched for in the
> reactor.

This sentence as conclusion of the cited web-site is simply wrong...

Excerpt of the cited web site:

Maven 3 no longer resolves parent POMs from the local project checkout 
unless the child POM's <relativePath> element is accurate, whether 
explicitly given or using the default value.

You must be aware of the part "...unless the child POM's <relativePath 
element is accurate, whether explicitly given or using the default value.".

The default value of a relativePath is "../pom.xml" which adresses the 
parent in the parent folder inside the folder structure on the file system.

> I'd like to understand more about the motivations behind this
> change. Are there any pointers to previous discussion?
The second part of the explanation explains an example:

In Maven 2, building the child project in isolation could fail while the 
reactor build would succeed to resolve the parent.

This means in Maven 2 it could happen if you try to build a child to 
fail, cause the parent pom is resolved against the local repository 
instead from the filesystem...

Kind regards
Karl-Heinz Marbaise
-- 
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Dipl.Ing.(FH) Karl-Heinz Marbaise        ICQ#: 135949029
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