zio-update-caddy: add script

.gitignore

@@ -27,4 +27,5 @@
 !/usr/local/bin/
 /usr/local/bin/*
 !/usr/local/bin/zio-backup
+!/usr/local/bin/zio-update-caddy
 !/usr/local/bin/zio-update-rootfs

usr/local/bin/zio-update-caddy

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+if [[ $UID != 0 ]]; then
+    exit 255
+fi
+
+caddy_tmp_install="/tmp/caddy"
+caddy_install="/usr/local/bin/caddy"
+
+if [[ -f "$caddy_tmp_install" ]]; then
+    rm "$caddy_tmp_install"
+fi
+
+wget "https://caddyserver.com/api/download?os=linux&arch=amd64&p=github.com%2Fcaddy-dns%2Fcloudflare" -O "$caddy_tmp_install"
+
+chmod +x "$caddy_tmp_install"
+caddy_version="$(/tmp/caddy version)"
+caddy_version_array=($caddy_version)
+caddy_version="${caddy_version_array[0]}"
+
+mv "$caddy_tmp_install" "$caddy_install-$caddy_version"
+
+if 
+ln -s -f "$caddy_install-$caddy_version" "$caddy_install"
+
+if [[ ! -L "$caddy_install" ]] && [[ ! -e "$caddy_install" ]]; then
+    rm -f "$caddy_install"
+    ln -s -f "$caddy_install-$caddy_version" "$caddy_install"
+    chmod +x "$caddy_install"
+fi