GKE Google Kubernetes fabric8 OAuthTokenProvider

OAuthGoogleTokenProvider.scala

import io.fabric8.kubernetes.client.OAuthTokenProvider;

class OAuthGoogleTokenProvider extends OAuthTokenProvider {
  private val binary = "gcloud"
  private val args = "config config-helper --format=json"

  override def getToken: String = {
    val response = (binary + " " + args).!!
    val token = new ObjectMapper().readTree(response)
      .get("credential")
      .get("access_token")
    token.getTextValue
  }
}