Major Description
With 3.6.0 this works:
mvn org.apache.maven.plugins:maven-dependency-plugin:3.6.0:unpack -Dartifact=org.apache.commons:commons-lang3:LATEST::jar -DoutputDirectory=.
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------< org.apache.maven:standalone-pom >------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] -------------------------------[ pom ]--------------------------------
[INFO]
[INFO] — dependency:3.6.0:unpack (default-cli) @ standalone-pom —
[INFO] Configured Artifact: org.apache.commons:commons-lang3:LATEST:jar
Downloading from artifactory-dms-maven-virtual: https://REPO/org/apache/commons/commons-lang3/maven-metadata.xml
Downloaded from artifactory-dms-maven-virtual: https://REPO/org/apache/commons/commons-lang3/maven-metadata.xml (1.8 kB at 4.2 kB/s)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.231 s
[INFO] Finished at: 2024-08-21T16:59:57+02:00
[INFO] ------------------------------------------------------------------------
but it fails with 3.7.0 and 3.7.1:
mvn org.apache.maven.plugins:maven-dependency-plugin:3.7.1:unpack -Dartifact=org.apache.commons:commons-lang3:LATEST::jar -DoutputDirec
tory=.
[INFO] Scanning for projects...
[INFO]
[INFO] -----------------< org.apache.maven:standalone-pom >------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] -------------------------------[ pom ]--------------------------------
[INFO]
[INFO] — dependency:3.7.1:unpack (default-cli) @ standalone-pom —
[INFO] Configured Artifact: org.apache.commons:commons-lang3:jar:LATEST:null
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.859 s
[INFO] Finished at: 2024-08-21T17:00:12+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-dependency-plugin:3.7.1:unpack (default-cli) on project standalone-pom: Execution default-cli of goal org.apache.maven.plugins:maven-dependency-plugin:3.7.1:unpack failed.: NullPointerException -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
If the extension is omitted it works with all version (This is a simplified example, the real use case is a private zip artifact.)
I tried it with Maven 3.9.5 and 3.9.9 on both Linux and Windows.
By the way: Thank you very much for developing/providing the Maven Dependency Plugin.