skaffold: Unhelpful error message

Expected behavior

A helpful error message.

Actual behavior

I can’t tell if it’s coming from skaffold or docker cli:

$ skaffold dev -f foo/skaffold.yaml
WARN[0001] Error processing base image for onbuild triggers: Get https://auth.docker.io/token?scope=repository%3Alibrary%2Fpython%3Apull&service=registry.docker.io: exit status 1. Dependencies may be incomplete.
WARN[0001] Error processing base image for onbuild triggers: Get https://auth.docker.io/token?scope=repository%3Amicrosoft%2Fdotnet%3Apull&service=registry.docker.io: exit status 1. Dependencies may be incomplete.
WARN[0001] Error processing base image for onbuild triggers: Get https://auth.docker.io/token?scope=repository%3Alibrary%2Fnode%3Apull&service=registry.docker.io: exit status 1. Dependencies may be incomplete.

Information

Skaffold version: v0.5.0 Operating system: macOS Content of skaffold.yaml:

apiVersion: skaffold/v1alpha2
kind: Config
build:
  artifacts:
  - imageName: vote
    workspace: voting-app/vote/
  - imageName: worker
    workspace: voting-app/worker/
  - imageName: result
    workspace: voting-app/result/
deploy:
  kubectl:
    manifests:
    - ./voting-app/k8s-specifications/*

Steps to reproduce the behavior

1. Start docker for mac
2. Start minikube (xhyve driveRr)
3. ~/.docker/config contents:

{
  "credHelpers" : {
    "us.gcr.io" : "gcloud",
    "asia.gcr.io" : "gcloud",
    "gcr.io" : "gcloud",
    "staging-k8s.gcr.io" : "gcloud",
    "eu.gcr.io" : "gcloud"
  },
  "auths" : {
    "https://gcr.io" : {

    },
    "us.gcr.io" : {

    },
    "https://staging-k8s.gcr.io" : {

    },
    "k8s.gcr.io" : {

    },
    "https://eu.gcr.io" : {

    },
    "staging-k8s.gcr.io" : {

    },
    "gcr.io" : {

    },
    "asia.gcr.io" : {

    },
    "https://k8s.gcr.io" : {

    },
    "https://asia.gcr.io" : {

    },
    "https://us.gcr.io" : {

    },
    "eu.gcr.io" : {

    }
  },
  "HttpHeaders" : {
    "User-Agent" : "Docker-Client/18.03.0-ce (darwin)"
  },
  "experimental" : "enabled",
  "credsStore" : "osxkeychain",
  "orchestrator" : "swarm"
}

1. Run skaffold dev command above.
2. deleting ~/.docker/config.json made things proceed, but I get different warnings:

skaffold dev -f 10-local-build-run-with-minikube/skaffold.yaml
2018/05/01 23:31:46 Unable to read "/Users/ahmetb/.docker/config.json", falling back on anonymous: open /Users/ahmetb/.docker/config.json: no such file or directory
2018/05/01 23:31:47 manifest digest: "sha256:ee8b362b5afc1e9db00b79c4db7d7744986507a8ba1d88f53e531e46e93454ec" does not match Docker-Content-Digest: "sha256:a346d13efede199fe161e5146acf080a205256431d82cc26f845eeb9c47b7bf7" for "index.docker.io/library/python:2.7-alpine"
2018/05/01 23:31:48 Unable to read "/Users/ahmetb/.docker/config.json", falling back on anonymous: open /Users/ahmetb/.docker/config.json: no such file or directory
2018/05/01 23:31:49 manifest digest: "sha256:01528b7048c72d7a36f4c216ce1b2c60751308b27538c140f12e0b10ba392246" does not match Docker-Content-Digest: "sha256:f4ea9cdf980bb9512523a3fb88e30f2b83cce4b0cddd2972bc36685461081e2f" for "index.docker.io/microsoft/dotnet:2.0.0-sdk"
2018/05/01 23:31:49 Unable to read "/Users/ahmetb/.docker/config.json", falling back on anonymous: open /Users/ahmetb/.docker/config.json: no such file or directory
2018/05/01 23:31:50 manifest digest: "sha256:14b627a91c92566d489d9d9073e465563be0e0c598c9537aa32e871a812018f5" does not match Docker-Content-Digest: "sha256:6bb963d58da845cf66a22bc5a48bb8c686f91d30240f0798feb0d61a2832fc46" for "index.docker.io/library/node:8.9-alpine"
Starting build...
Found [minikube] context, using local docker daemon.
WARN[0004] run: build: build step: running build for artifact: running build: read auth configs: docker config: opening docker config: open /Users/ahmetb/.docker/config.json: no such file or directory
Watching for changes...