Getting Unauthorized while pushing helm chart to OCI registry if repository name contains push

[rohanKanojia]

Describe the bug

For a valid registry requiring authentication, I kept getting Unauthorized error even if I provided the correct credentials. When I debugged the issue, I discovered it had to do with the repository name. My test project name was jkube-helm-push-oci which affected this statement:

https://github.com/eclipse/jkube/blob/cc6d239259aab437655a8bfdb76f0328f1170a95/jkube-kit/resource/helm/src/main/java/org/eclipse/jkube/kit/resource/helm/oci/OCIRegistryInterceptor.java#L98-L99

While requesting token we need to add scope of that token : whether it's for a read (pull) or write operation (push). By default in first request Www-Authenticate header contains pull for read only. We need to manually add push to this in order to fetch token for uploading chart. However, this condition turns false if the repository name already contains push substring.

Rather than comparing scope field in Www-Authenticate header as plain string, we should parse it and then compare only the last segment.

Eclipse JKube version

SNAPSHOT

Component

Kubernetes Maven Plugin

Apache Maven version

None

Gradle version

None

Steps to reproduce

Try pushing helm chart to some OCI registry with a chart name containing push keyword. Push would always fail

Expected behavior

Push should be successful when valid credentials are provided regardless of project name

Runtime

Kubernetes (vanilla)

Kubernetes API Server version

1.25.3

Environment

Linux

Eclipse JKube Logs

[ERROR] k8s: Error performing helm push: java.lang.IllegalStateException: Failure in initiating upload request: Unauthorized
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  6.903 s
[INFO] Finished at: 2023-10-11T12:02:04+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.eclipse.jkube:kubernetes-maven-plugin:1.15-SNAPSHOT:helm-push (default-cli) on project jkube-helm-push-testing: Failure in initiating upload request: Unauthorized -> [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/MojoExecutionException

Sample Reproducer Project

No response

Additional context

No response