kubectl alias for namespaces

.bashrc

function kns {
  if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    echo -e "Use kns to change or get the current namespace:\n"
    echo -e " kns\t\t Show current namespace"
    echo -e " kns <namespace> Change to namespace"
    return 0
  fi
  
  if [ "$1" ]; then
    namespaces="$(k get ns | grep "$1")"
    ns_count="$(echo "$namespaces" | grep -c "^$1")"
    [ "$ns_count" -gt 1 ] && echo "Error: Found $ns_count namespaces with given pattern:" && echo $namespaces && return 2
    [ "$ns_count" -lt 1 ] && echo "Error: No namespace found with given pattern" && return 1
    kubectl config set-context --current --namespace $1
  else
    echo -n "Current namespace: "
    kubectl config view --minify | grep namespace | cut -d" " -f6
  fi
}