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From Jason van Zyl <ja...@tesla.io>
Subject Re: maven dependency plugin and maven 3
Date Sun, 03 Jun 2012 15:52:01 GMT
You need to make a test case so we can reproduce it. It's impossible to tell whether it's you,
your environment, the dependency plugin or Maven itself from looking at the textual output
of the build.

On Jun 3, 2012, at 11:42 AM, Anthony Dahanne wrote:

> 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
> <pom.xml>
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Thanks,

Jason

----------------------------------------------------------
Jason van Zyl
Founder & CTO, Sonatype
Founder,  Apache Maven
http://twitter.com/jvanzyl
---------------------------------------------------------

To do two things at once is to do neither.
 
 -—Publilius Syrus, Roman slave, first century B.C.






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