truestuff/fix-kubectl

#! /usr/bin/env bash
BASE_0="$(basename ${0#-})"
BASE_SHELL="$(basename "$SHELL")"
if [[ -z "${BASE_0}" || "${BASE_0}" == "$BASE_SHELL" ]]; then

    [[ -n "$KUBECONFIG" && -r "$KUBECONFIG" ]] || unset KUBECONFIG
    
    [[ ! -r "$HOME/.kube/config" ]] \
    || export KUBECONFIG="${KUBECONFIG:-$HOME/.kube/config}"

    if [[ -z "$KUBECONFIG" && -z "$FIX_KUBECTL_RECALL"  ]]; then
        unset kubectl 2>/dev/null || unalias kubectl 2>/dev/null || true
    
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
    fi
    
    [[ 'function' == $(type -t kubectl-fix) ]] && unset kubectl-fix
    
    if [[ -n "$(type -t 'k3s')" && -z "$(type -t 'kubectl')" ]]; then
        if [[ -r "${KUBECONFIG}" ]]; then
            kubectl() { k3s kubectl "${@}"; }
        elif [[ -n "${KUBECONFIG}" && -e "${KUBECONFIG}" ]]; then
            eval "
            kubectl-fix() {
                mkdir \"$HOME/.kube\" -p
                if [[ -e \"\${KUBECONFIG}\" && ! -r \"$HOME/.kube/config\" ]]; then
                    sudo install --mod 600 --owner \"$USER\" \"\${KUBECONFIG}\" \"$HOME/.kube/config\"
                    unset KUBECONFIG
                fi
                FIX_KUBECTL_RECALL=1 . \"$SCRIPT_FULL_PATH\"
            }"
        fi
    fi
    
    if [[ -n "$(type -t 'kubectl')" ]]; then
    
        . <( kubectl completion ${SHELL##*/} )
    
        if [[ -n "$(type -t 'kubectl-cnpg')" ]]; then
            . <( kubectl cnpg completion ${SHELL##*/} )
	else
	    DL_VER=v1.21.1
	    GH_URL=https://github.com/cloudnative-pg/cloudnative-pg
	    DL_FILE="kubectl-cnpg_${DL_VER}_linux_x86_64.deb"
	    URL=${GH_URL}/releases/download/${DL_VER}/${DL_FILE}
	    printf '%s\n' \
		'To download and install cnpg kubectl plugin, run:' \
	        "    curl -sSLO ${URL}" \
	        "    sudo dpkg -i $DL_FILE"

        fi
    
        if [[ -z "$(type -t 'kubetui')" ]]; then
	    DL_VER='v1.4.2'
	    GH_URL=https://github.com/sarub0b0/kubetui
	    DL_FILE=kubetui-x86_64-unknown-linux-musl-rustls
	    URL=${GH_URL}/releases/download/${DL_VER}/${DL_FILE}
	    printf '%s\n' \
		'To download and install kubetui, run:' \
	        "    curl -sSL ${URL} > ~/bin/kubetui" \
	        "    chmod +x ~/bin/kubetui"
        fi
    
        if [[ -z "$(type -t 'k3s')" ]]; then
	    printf '%s\n' \
		'To download and install k3s, run:' \
	        "    curl -sS https://webinstall.dev/k9s | bash"
        fi
    
        if [[ -n "$(type -t 'k3s')" ]]; then
            . <( k3s completion ${SHELL##*/} )
        fi
    
        if [[ -n "$(type -t 'helm')" ]]; then
            . <( helm completion ${SHELL##*/} 2>/dev/null )
        fi
    
        kg() {
    	kubectl get ${NS:+--namespace=}${NS:---all-namespaces} "${@}" | { sed -u 1q; sort; }
        }
    fi
elif [[ "$1" == '-' ]]; then
    printf "SCRIPT_FULL_PATH='%s'\n" "${BASH_SOURCE[0]}"
    cat "${BASH_SOURCE[0]}"
else
    SCRIPT_NAME="$BASE_0"
    printf '%s\n' \
        "It seems $SCRIPT_NAME was invoked as a script. It should be sourced instead." \
	'The easiest way is to call it like this:' \
	"    $ . <( $SCRIPT_NAME - ) # Note the '-' after the script's name" \
        ''
fi