make update logic smarter

updatemirror.sh

@@ -25,9 +25,28 @@ function main () {
     find /etc/apt/sources.list.d/ -type f -exec \
       sed -i "s|archive\.ubuntu\.com|us.ubuntu.com|g" {} +
 
+
+    UPDATED=0
+    if ! which jq > /dev/null; then
+        echo "jq not found, installing..." > /dev/stderr
+        if [[ "$UPDATED" -eq 0 ]]; then
+            apt update
+            UPDATED=1
+        fi
+        apt install -y jq
+    fi
+
+    if ! which curl > /dev/null; then
+        echo "curl not found, installing..." > /dev/stderr
+        if [ "$UPDATED" -eq 0 ]; then
+            apt update
+            UPDATED=1
+        fi
+        apt install -y curl
+    fi
+
     echo "Detecting actual country..." > /dev/stderr
 
-    apt update && apt install -y curl jq
     IPINFO="$(curl -s ipinfo.io)"
     if [ -z "$IPINFO" ]; then
         echo "Failed to get IP info" > /dev/stderr