docker:push failed with ARG in FROM

[ChristianKnof]

Description

As seen in the example [dockerfile-base-as-arg|https://github.com/fabric8io/docker-maven-plugin/blob/master/it/dockerfile-base-as-arg/src/main/docker/Dockerfile] we tried to parametrize our docker-builds, the docker:build works fine, but the following docker:push crashes with:

[ERROR] Failed to execute goal io.fabric8:docker-maven-plugin:0.44.0:push (default-cli) on project xxx: Execution default-cli of goal io.fabric8:docker-maven-plugin:0.44.0:push failed: Given Docker name '${baseImage}' is invalid:
[ERROR] * image part '${baseImage}' doesn't match allowed pattern '[a-z0-9]+(?:(?:(?:[.]|__|[-]*)[a-z0-9]+)+)?(?:(?:/[a-z0-9]+(?:(?:(?:[.]|__|[-]*)[a-z0-9]+)+)?)+)?'

Info

OUR: Property:
<docker.buildArg.baseImage>privateImageRegistry/privateImage:CustomTag</docker.buildArg.baseImage>

OUR-Configuration:
<plugin> <groupId>io.fabric8</groupId> <artifactId>docker-maven-plugin</artifactId> <configuration> <images> <image> <name>${docker-registry.url}/${project.artifactId}:${project.version}</name> <build> <contextDir>${project.basedir}</contextDir> <dockerFile>${project.basedir}/docker/Dockerfile</dockerFile> <noCache>true</noCache> </build> </image> </images> </configuration> </plugin>
OUR simplified Dockerfile:
ARG baseImage FROM ${baseImage}

• docker-maven-plugin version : 0.44.0
• Maven version (mvn -v) : 3.9.4

[rohanKanojia]

Do you think this is duplicate of #1756 ? Could you please check via SNAPSHOT build if it's working as expected?

[ChristianKnof]

Thank you for the quick reply. I have tried 0.45-SNAPSHOT, but it is the same error message. It seems to be the same environment as #1756, however the docker:build is successful, only the docker:push fails. As an addition, the ARG is set with a property "docker.buildArg.baseImage". The ARG section in the BUILD has been removed.
I have added our configuration and the simplified Dockerfile in the tickettext.

[rohanKanojia]

@ChristianKnof : Thanks for reporting! I can reproduce the issue.

[nodece]

Any updates?

[rohanKanojia]

@nodece : Let me provide a fix this week.