Better kubernetes configuration detection based on k8s libraries #30
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Please test this locally (go run ./main.go) and in a k8s cluster both with a .kube/config with no KUBECONFIG env variable set and one with a KUBECONFIG env variable set before merging. It works for me, but I want to ensure it doesn't break anyone.
Instead of doing our own user home directory detection for .kube/config, use the k8s.io/cmdclient built-in methods which support KUBECONFIG env variable, $HOME/.kube/config, and KUBERNETES_SERVICE env variables automatically.
Also print out a sanitized representation of the config at startup in case of misconfiguration.