Setting auth credentials from command line or environment variable

In the case jib-maven-plugin is used in a CI environment, it can be useful to pass the authentication credentials directly via the command line or via environment variable.

For example with Gitlab CI, it is the case that CI jobs have environment variables with temporary tokens to push images to the Gitlab Registry.

Currently, it seems to me that the only way to take advantage of these is either via docker login (which means I need docker installed now) or via some hack by generating a custom settings.xml.

It would be great either to have jib-maven-plugin accept credentials via command line or to document what is the preferred way to achieve the requirement.

[coollog]

We could also consider adding auth to the image configurations for jib-maven-plugin as well (like we have in jib-gradle-plugin), so people could do:

<configuration>
    <to>
        <image>imagename</image>
        <auth>
            <username>${env.REGISTRY_USERNAME}</username>
            <password>${env.REGISTRY_PASSWORD}</password>
        </auth>
    </to>
</configuration>

and be able to use REGISTRY_USERNAME and REGISTRY_PASSWORD environment variables as the credentials.

[victornoel]

@coollog @TadCordle thanks, it works well, I just tested it.

For the record, the README wasn’t updated with the new options.