Unknown issue with k3s-uninstall.sh exiting with 1.

The script looks to be completing without error in my testing as well as
in the original issue so I am forcing an exit with 0 until the cause can
be found.

Fixes #23

templates/k3s-uninstall.sh.j2

@@ -1,44 +1,58 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
-set -x
-[ $(id -u) -eq 0 ] || exec sudo $0 $@
+set -xeuo pipefail
 
-/usr/local/bin/k3s-killall.sh
+[[ "$(id -u)" -eq 0 ]] || exec sudo "${0}" "${@}"
 
-if which systemctl; then
+remove_uninstall() {
+    [ -f "${0}" ] && rm -- "${0}"
+    exit 0
+}
+trap remove_uninstall EXIT
+
+/usr/local/bin/k3s-killall.sh ; echo "k3s-killall.sh exited ${?} ..."
+
+WSYSCTL=$(which systemctl || true)
+
+if [[ "${WSYSCTL}" != "" ]] ; then
     systemctl disable k3s
     systemctl reset-failed k3s
     systemctl daemon-reload
 fi
 
-if which rc-update; then
+WRCUPD=$(which rc-update || true)
+
+if [[ "${WRCUPD}" != "" ]] ; then
     rc-update delete k3s default
 fi
 
-for unit in /etc/systemd/system/k3s*.service; do
-    [ -f "$unit" ] && rm -f "$unit"
-done
+K3SSVC=$(ls /etc/systemd/system/k3s*.service || true)
 
-remove_uninstall() {
-    [ -f /usr/local/bin/k3s-uninstall.sh ] && rm -f /usr/local/bin/k3s-uninstall.sh
-}
-trap remove_uninstall EXIT
+if [[ "${K3SSVC}" != "" ]] ; then
+    for unit in /etc/systemd/system/k3s*.service ; do
+        [ -f "${unit}" ] && rm -f "${unit}"
+    done
+fi
 
-if (ls /etc/systemd/system/k3s*.service || ls /etc/init.d/k3s*) >/dev/null 2>&1; then
+K3SINIT=$(ls /etc/init.d/k3s* || true)
+
+if [[ "${K3SINIT}" != "" ]] ; then
     set +x; echo 'Additional k3s services installed, skipping uninstall of k3s'; set -x
     exit
 fi
 
-for cmd in kubectl crictl ctr; do
-    if [ -L "{{ k3s_install_dir }}/$cmd" ]; then
-        rm -f "{{ k3s_install_dir }}/$cmd"
+for cmd in {kubectl,crictl,ctr} ; do
+    if [ -L "{{ k3s_install_dir }}/${cmd}" ]; then
+        rm -f "{{ k3s_install_dir }}/${cmd}"
     fi
 done
 
 [ -d /etc/rancher/k3s ] && rm -rf /etc/rancher/k3s
 [ -d /var/lib/rancher/k3s ] && rm -rf /var/lib/rancher/k3s
 [ -d /var/lib/kubelet ] && rm -rf /var/lib/kubelet
+
 for bin in {{ k3s_install_dir }}/k3s*; do
-    [ -f "$bin" ] && rm -f "$bin"
+    [ -f "${bin}" ] && rm -f "${bin}"
 done
+
 [ -f /usr/local/bin/k3s-killall.sh ] && rm -f /usr/local/bin/k3s-killall.sh