Added kubectl fix for TrueNAS

_home/private_dot_local/bin/executable_szetup-kubectl4k3s

@@ -0,0 +1,120 @@
+#! /usr/bin/env bash
+# shellcheck disable=SC2034,SC1090
+# SC2034 variables appear unsued. export if used externally
+# - uneeded, as this checked whether script is sourced
+# SC1090 Can't follow non-constant source
+
+# User basename instead of ${0:##*/} to be POSIX compliant
+BASE_0=${BASE_0:-$(basename $0)}
+SCRIPT_DIR=${SCRIPT_DIR:-"$( cd -- "$( dirname -- "$0" )" &> /dev/null && pwd )"}
+BASE_SHELL=$(basename "$SHELL")
+
+# Helper function
+is_sourced() {
+    if [ -n "$ZSH_VERSION" ]; then 
+        case $ZSH_EVAL_CONTEXT in *:file:*) return 0;; esac
+    else
+        # case ${0##*/} in dash|-dash|bash|-bash|ksh|-ksh|sh|-sh) return 0;; esac
+        case "$(basename $0)" in $BASE_SHELL|-$BASE_SHELL) return 0;; esac
+    fi
+    return 1; # NOT sourced.
+}
+
+if is_sourced; then
+    # This part is sourced, and might run in a non-bash shell
+    DBG_="Is Sourced"
+    USER_HOME=$HOME
+    [[ -n "${SUDO_USER}" ]] && USER_HOME="$(eval "echo ~${SUDO_USER}")"
+
+    [[ -n "$KUBECONFIG" && -r "$KUBECONFIG" ]] || unset KUBECONFIG
+    
+    [[ ! -r "$HOME/.kube/config" ]] \
+    || export KUBECONFIG="${KUBECONFIG:-$HOME/.kube/config}"
+
+    if [[ -z "$KUBECONFIG" && -z "$FIX_KUBECTL_RECALL"  ]]; then
+        (unset kubectl 2>/dev/null) || (unalias kubectl 2>/dev/null) || true
+    
+        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
+    fi
+    
+    (unset kubectl-fix 2> /dev/null) || true
+    
+    DBG_="Check if k3s exists, but kubectl isn't available"
+    if (type 'k3s' >/dev/null 2>&1) && ! (type 'kubectl' >/dev/null 2>&1); then
+        DBG_="Define kubectl"
+        if [[ -r "${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_DIR}/${BASE_0}\"
+            }"
+	    printf '%s\n' \
+                "KUBECONFIG[${KUBECONFIG}] exsits, but is unreadable." \
+                'Run kubectl-fix (which will invoke sudo) to fix'
+        fi
+    fi
+    
+    if (type 'kubectl' >/dev/null 2>&1); then
+    
+        . <( kubectl completion "${BASE_SHELL}" )
+    
+        if (type 'kubectl-cnpg' >/dev/null 2>&1 ); then
+            . <( kubectl cnpg completion "${BASE_SHELL}" )
+        fi
+        if ! (type 'kubectl-cnpg' >/dev/null 2>&1) || [[ -n "$UPGRADE" ]]; then
+            DL_VER=1.22.0
+            GH_URL=https://github.com/cloudnative-pg/cloudnative-pg
+            DL_FILE="kubectl-cnpg_${DL_VER}_linux_x86_64.deb"
+            URL=${GH_URL}/releases/download/v${DL_VER}/${DL_FILE}
+            printf '%s\n' \
+            'To download and install cnpg kubectl plugin, run:' \
+                "    curl -sSLO ${URL}" \
+                "    sudo dpkg -i $DL_FILE"
+        fi
+    
+        if ! (type 'kubetui' >/dev/null 2>&1) || [[ -n "$UPGRADE" ]]; then
+            DL_VER=1.5.0
+            GH_URL=https://github.com/sarub0b0/kubetui
+            DL_FILE=kubetui-x86_64-unknown-linux-musl-rustls
+            URL=${GH_URL}/releases/download/v${DL_VER}/${DL_FILE}
+            printf '%s\n' \
+            'To download and install kubetui, run:' \
+                "    curl -sSL ${URL} > ~/bin/kubetui" \
+                "    chmod +x ~/bin/kubetui"
+        fi
+    
+        if ! (type 'k9s' >/dev/null 2>&1) || [[ -n "$UPGRADE" ]]; then
+            printf '%s\n' \
+            'To download and install k9s, run:' \
+                "    curl -sS https://webinstall.dev/k9s | bash"
+        fi
+    
+        if (type 'k3s' >/dev/null 2>&1 ); then
+            . <( k3s completion "${SHELL##*/}" )
+        fi
+    
+        if (type 'helm' >/dev/null 2>&1); then
+            . <( helm completion "${SHELL##*/}" 2>/dev/null )
+        fi
+    
+        kg() {
+    	kubectl get "${NS:+--namespace=}${NS:---all-namespaces}" "${@:-pods}" | { sed -u 1q; sort; }
+        }
+    fi
+elif [[ "$1" == '-' ]]; then
+    printf 'BASE_0="%s"\nSCRIPT_DIR=%s\n' "${BASE_0}" "${SCRIPT_DIR}"
+    cat "${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