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From Anthony Dahanne <anthony.daha...@gmail.com>
Subject Fwd: maven dependency plugin and maven 3
Date Sun, 03 Jun 2012 15:42:10 GMT
Hello  all,
sorry to bump ... :-(
but I'm still having issues understanding what's wrong with the maven
dependency plugin and maven 3...
I attached a pom to demonstrate the problem :
Using maven 3,
1) do a mvn package
2) then do a mvn
org.apache.maven.plugins:maven-dependency-plugin:2.4:purge-local-repository
-Dverbose=true   -DresolutionFuzziness=version -U

You will see the following output :
[INFO] --- maven-dependency-plugin:2.4:purge-local-repository
(default-cli) @ pof ---
[WARNING] Missing POM for javax.servlet:servlet-api:jar:2.5
[INFO] Skipping: pof. It cannot be resolved.
[INFO] Nothing to do for project: net.dahanne:pof:jar:1.0.0-SNAPSHOT

But I can tell you javax.servlet:servlet-api:jar:2.5 has a pom, and is
already installed in the local maven repository.

Could you guys share some light on this ? I think the maven dependency
plugin is not working fine with maven 3 , as opposed to what the
documentation says :
 https://cwiki.apache.org/MAVEN/maven-3x-plugin-compatibility-matrix.html

Thanks,
Anthony


---------- Forwarded message ----------
From: Anthony Dahanne <anthony.dahanne@gmail.com>
Date: Thu, May 31, 2012 at 5:50 PM
Subject: maven dependency plugin and maven 3
To: users@maven.apache.org


Hello all,
I'm only using maven 3 on my machine (be it command line or m2e).
I tried to use the maven dependency plugin on a project,

mvn org.apache.maven.plugins:maven-dependency-plugin:2.4:purge-local-repository
-Dverbose=true   -DresolutionFuzziness=version

and it printed such warnings :

[WARNING] Missing POM for javax.servlet:servlet-api:jar:2.5
[WARNING] Missing POM for org.easymock:easymock:jar:3.0
[WARNING] Missing POM for junit:junit:jar:4.8.2

before telling me that the build was successful.
Thing is, it did not purge anything from my repo; because of those
warnings actually; launching the same command with -X, I could see :
[DEBUG] Verifying availability of
/Users/anthony/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.pom
from []
[WARNING] Missing POM for javax.servlet:servlet-api:jar:2.5: Error
resolving project artifact: Could not find artifact
javax.servlet:servlet-api:pom:2.5 for project
javax.servlet:servlet-api:pom:2.5
[DEBUG]   javax.servlet:servlet-api:jar:2.5:provided (selected for provided)

and... I can tell you
/Users/anthony/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.pom
exists and contains :
<project>
 <modelVersion>4.0.0</modelVersion>
 <groupId>javax.servlet</groupId>
 <artifactId>servlet-api</artifactId>
 <version>2.5</version>
</project>

Debugging the code a little, I could notice that this goal was using
org.apache.maven.artifact.resolver.DefaultArtifactResolver#resolveTransitively
from maven-artifact-manager 2.0.9 to find the dependencies.

I am wondering if this plugin failed purging my dependencies because
it used a maven 2 library to scan the dependencies, and my local repo
has only been built and used by mvn3 (and the repo metadata/layout
could be different to what this plugin was expecting) ..
Any thoughts ?
thanks a lot in advance
Anthony

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