tycho-versions-plugin for 4.0.9 fails with "missing class"

[datho7561]

We get the following error while trying to use set-version:

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-versions-plugin:4.0.9:set-version (default-cli) on project parent: Execution default-cli of goal org.eclipse.tycho:tycho-versions-plugin:4.0.9:set-version failed: A required class was missing while executing org.eclipse.tycho:tycho-versions-plugin:4.0.9:set-version: org/eclipse/tycho/model/manifest/MutableBundleManifest

Specific way that we call it:

./mvnw -Dtycho.mode=maven org.eclipse.tycho:tycho-versions-plugin:set-version -DnewVersion=$VERSION-SNAPSHOT

(see https://github.com/eclipse/lsp4mp/blob/f3628e2bc9521d8507c7125ca3e9915f34b567ea/Release.Jenkinsfile#L30)

[datho7561]

The 4.0.8 version of the plugin works

[SVNKoch]

I get the same error.
Working command:
mvn versions:update-parent -DgenerateBackupPoms=false org.eclipse.tycho:tycho-versions-plugin:4.0.8:set-version -DnewVersion="12.1.0-SNAPSHOT"
Not working:
mvn versions:update-parent -DgenerateBackupPoms=false org.eclipse.tycho:tycho-versions-plugin:4.0.9:set-version -DnewVersion="12.1.0-SNAPSHOT"

[sratz]

I cannot reproduce this.

git clone https://github.com/eclipse/lsp4mp.git
cd lsp4mp/microprofile.jdt
mvn org.eclipse.tycho:tycho-versions-plugin:4.0.9:set-version -DnewVersion=1.2.3-SNAPSHOT

works perfectly fine here.

Can you run with -e and give some information about your environment (java version, etc.)?

[laeubi]

Just some notes

• -Dtycho.mode=maven is not supported anymore, you should avoid using that
• when changing Tycho versions I noticed it is sometimes required to pass -U to force maven to really download everything required.
• If you are using a different version in your build it can become a problem for CLI invocations, so make sure that the project uses the same tycho version as well as the extensions.xml (if used).

[datho7561]

If you are using a different version in your build it can become a problem for CLI invocations

This was the issue. We were using a 3.y.z version of Tycho for the build, but we didn't specify the version of the tycho-versions-plugin to use, so I'm guessing it pulled in the latest. @rgrunber made a change to update to Tycho 4.0.9 for the build, so now (as @sratz pointed out) running tycho-versions-plugin 4.0.9 on the command line works: eclipse/lsp4mp@7ca4b44#diff-a8cdf9ab5d54b6694c54edd69c5b02dbcb9d047c63d492cfe2ee7160063dd918R13

[datho7561]

Thanks for your help and sorry for the noise!