Require docker login when push=true

[benfortuna]

It appears you need to run docker login prior to pushing to hub.docker.com.

Would it be possible to integrate this in the plugin? Currently push will fail with following error:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':buildDocker'.
> Docker execution failed
  Command line [docker push image/example:1.0] returned:
  denied: requested access to the resource is denied

Task configuration is like this:

docker {
    baseImage "image/base:1"
}

task buildDocker(type: Docker) {
    applicationName = 'image/example'
    tagVersion = '1.0'
    push true
    apiUsername = username
    apiPassword = password
    apiEmail = email@example.com
}

I haven't tried with useApi=true as yet as that was giving a different error.

[bjornmagnusson]

Does it work if you perform docker login before running your build?

[benfortuna]

Yes, can confirm if I run docker login first the push will be successful.

However if it can be integrated into the plugin it would save some trouble configuring automated builds.

[bjornmagnusson]

If you can provide an proposal on how to fix this, I would be prepared to take a look at it. Contributions are very welcome

[jamesdube]

I'd be willing to help too bad I don't know much about developing gradle plugins, if I could get pointers I would try