Benjamin Marwell created MNG-8162:
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Summary: Maven should warn about modules relative to parent
directory
Key: MNG-8162
URL: https://issues.apache.org/jira/browse/MNG-8162
Project: Maven
Issue Type: Task
Components: Core
Reporter: Benjamin Marwell
Maven should warn if a pom project references modules which are not direct
descendants, e.g.
{code:html}
<module>../other</module>
{code}
h2. Rationale
Given this situation:
* the repository root does not contain the root pom.xml
* A subfolder contains the "root" pom.xml (e.g. ./Build/pom.xml)
* Maven must be called either via {{mvn -f Build}} or {{cd Build && mvn}}
Then it is hard to determine the root:
* Is it in the VCS clone/checkout root?
* Is it in the first common ancestor? Maybe it is in {{project/dev/impl/Build}}
?
* Is root=true a valid tag in either of these cases?
* what if you call maven from even yet a higher directory?
* What if both .mvn folders and the root tags are present?
* What if there are multitple .mvn folders (lets say in repo root, and in
./project/dev/impl and in ./project/dev/impl/Build)?
In any of those cases and combinations of those, Maven should print a warning
h2. Suggested warning
{code}
[WARN] This maven project has modules relative to the parent folder
(<module>../{..}</module>. This is an invalid configuration and will be
unsupported in future releases. To fix, move all descendants of a pom project
to its folder, making it a direct descendant.
{code}
h2. Checks
Should be included in the new self-check
h2. Suggested deprecation
Maven 5 should not work under such circumstances
h2. Backports
Might be a candidate for backporting to 3.9.
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