Fish Shell function to display the kubernetes namespace to the right

kubernetes_ctx_ns.fish

function kubectl_status
  [ -z "$KUBECTL_PROMPT_SEPARATOR" ]; and set -l KUBECTL_PROMPT_SEPARATOR "/"
  set -l config $KUBECONFIG
  [ -z "$config" ]; and set -l config "$HOME/.kube/config"
  if [ ! -f $config ]
    echo (set_color red)$KUBECTL_PROMPT_ICON" "(set_color white)"no config"
    return
  end

  set -l ctx (kubectl config current-context 2>/dev/null)
  if [ $status -ne 0 ]
    echo (set_color red)$KUBECTL_PROMPT_ICON" "(set_color white)"no context"
    return
  end

  set -l ns (kubectl config view -o json | jq --arg context $context -r '.contexts[] | select(.name | contains($context)) | .context.namespace')
  [ -z $ns ]; and set -l ns 'default'

  echo (set_color 999999)"$ctx$KUBECTL_PROMPT_SEPARATOR$ns"
end

function fish_right_prompt
  echo (kubectl_status)
end