I’m sorry for the confusion, mvn4 was still pointing to Maven 4.0.0-rc-2 when I
ran that command below. With Maven 4.0.0-rc-3 the output is 4.0.0-rc-3, but I
still don’t expect that command to return Maven’s version instead of the
project’s version.
Nils.
> Op 10 mrt 2025, om 16:05 heeft Nils Breunese <n...@breun.nl> het volgende
> geschreven:
>
> Hello,
>
> With Maven 3.9.9 I’m using a command like this to find the version of a
> project on the command line:
>
> ❯ mvn3 help:evaluate --quiet -DforceStdout=true -Dexpression=project.version
> Apache Maven 3.9.9 (8e8579a9e76f7d015ee5ec7bfcdc97d260186937)
> Maven home: /opt/local/share/java/maven3
> Java version: 21.0.6, vendor: Azul Systems, Inc., runtime:
> /opt/local/Library/Java/JavaVirtualMachines/jdk-21-azul-zulu.jdk/Contents/Home
> Default locale: nl_NL, platform encoding: UTF-8
> OS name: "mac os x", version: "15.3.1", arch: "aarch64", family: "mac"
> 14.2.0-SNAPSHOT%
>
> This project’s root pom.xml contains <version>${revision}</version> and has
> this property: <revision>14.2.0-SNAPSHOT<revision>, so I indeed expect this
> to return 14.2.0-SNAPSHOT.
>
> However, with Maven 4.0.0-rc-3 I get the following output on the exact same
> repository:
>
> ❯ mvn4 help:evaluate --quiet -DforceStdout=true -Dexpression=project.version
> 4.0.0-rc-2
>
> Now, I like that the Maven 4 output is more quiet, but I’m surprised that the
> project version value is suddenly different. I’d say Maven 3 is correct, and
> I have no idea where this '4.0.0-rc-2' value comes from (it is not present in
> the code base at all). It seems suspicious that this value is almost, but not
> exactly (rc-2 vs rc-3), the Maven version.
>
> Any ideas?
>
> Nils.
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