add ota toggle script

scripts/toggle-ota.sh

@@ -0,0 +1,122 @@
+#!/usr/bin/env bash
+
+# toggle_apple_updates.sh
+# Toggles Apple OTA update domains in /etc/hosts between blocked and unblocked.
+
+HOSTS_FILE="/etc/hosts"
+
+APPLE_DOMAINS=(
+    "swscan.apple.com"
+    "swdownload.apple.com"
+    "swcdn.apple.com"
+    "swdist.apple.com"
+    "appldnld.apple.com"
+    "mesu.apple.com"
+    "gdmf.apple.com"
+)
+
+BLOCK_IP="0.0.0.0"
+SECTION_COMMENT="# Block OTA"
+
+# ── Colours ──────────────────────────────────────────────────────────────────
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+CYAN='\033[0;36m'
+BOLD='\033[1m'
+RESET='\033[0m'
+
+# ── Banner ────────────────────────────────────────────────────────────────────
+echo ""
+echo -e "${BOLD}+----------------------------------------------+${RESET}"
+echo -e "${BOLD}|      Apple OTA Update Toggle Utility         |${RESET}"
+echo -e "${BOLD}+----------------------------------------------+${RESET}"
+echo ""
+
+# ── Root warning ──────────────────────────────────────────────────────────────
+echo -e "${YELLOW}⚠  WARNING: This script modifies ${HOSTS_FILE}.${RESET}"
+echo -e "${YELLOW}   Root (administrator) privileges are required.${RESET}"
+echo ""
+
+# ── Authenticate via sudo ─────────────────────────────────────────────────────
+echo -e "${CYAN}Please enter your password to continue:${RESET}"
+sudo -v 2>/dev/null
+if [[ $? -ne 0 ]]; then
+    echo -e "${RED}✖  Authentication failed or was cancelled. Exiting.${RESET}"
+    exit 1
+fi
+echo ""
+
+# ── Detect current state ──────────────────────────────────────────────────────
+# Check if the first domain is currently blocked (present and uncommented)
+FIRST_DOMAIN="${APPLE_DOMAINS[0]}"
+if sudo grep -qE "^${BLOCK_IP}[[:space:]]+${FIRST_DOMAIN}" "${HOSTS_FILE}"; then
+    CURRENT_STATE="blocked"
+else
+    CURRENT_STATE="unblocked"
+fi
+
+CURRENT_STATE_UPPER=$(echo "${CURRENT_STATE}" | tr '[:lower:]' '[:upper:]')
+echo -e "  Current state: ${BOLD}Apple updates are ${CURRENT_STATE_UPPER}${RESET}"
+echo ""
+
+# ── Toggle ────────────────────────────────────────────────────────────────────
+if [[ "${CURRENT_STATE}" == "blocked" ]]; then
+    # ── UNBLOCK: comment out the block section ────────────────────────────────
+    echo -e "${CYAN}→ Unblocking Apple update domains...${RESET}"
+
+    # Comment out the section header and each domain line
+    sudo sed -i '.bak' "s|^${SECTION_COMMENT}$|#${SECTION_COMMENT}|g" "${HOSTS_FILE}"
+    for domain in "${APPLE_DOMAINS[@]}"; do
+        sudo sed -i '.bak' "s|^${BLOCK_IP}[[:space:]][[:space:]]*${domain}|# ${BLOCK_IP} ${domain}|g" "${HOSTS_FILE}"
+    done
+
+    NEW_STATE="UNBLOCKED"
+    STATE_COLOR="${GREEN}"
+    STATE_MSG="Apple software updates are now ${GREEN}${BOLD}ENABLED${RESET}."
+    STATE_DETAIL="Your Mac can reach Apple's update servers normally."
+
+else
+    # ── BLOCK: uncomment or add the block section ─────────────────────────────
+    echo -e "${CYAN}→ Blocking Apple update domains...${RESET}"
+
+    # Uncomment lines that were previously commented out by this script
+    sudo sed -i '.bak' "s|^#${SECTION_COMMENT}$|${SECTION_COMMENT}|g" "${HOSTS_FILE}"
+    for domain in "${APPLE_DOMAINS[@]}"; do
+        # If the commented-out version exists, uncomment it
+        if sudo grep -qE "^#[[:space:]]*${BLOCK_IP}[[:space:]]+${domain}" "${HOSTS_FILE}"; then
+            sudo sed -i '.bak' "s|^#[[:space:]]*${BLOCK_IP}[[:space:]][[:space:]]*${domain}|${BLOCK_IP} ${domain}|g" "${HOSTS_FILE}"
+        # If the domain isn't present at all, append the block section
+        elif ! sudo grep -qE "${domain}" "${HOSTS_FILE}"; then
+            # Append section header if it doesn't exist
+            if ! sudo grep -q "^${SECTION_COMMENT}$" "${HOSTS_FILE}"; then
+                echo "" | sudo tee -a "${HOSTS_FILE}" > /dev/null
+                echo "${SECTION_COMMENT}" | sudo tee -a "${HOSTS_FILE}" > /dev/null
+            fi
+            echo "${BLOCK_IP} ${domain}" | sudo tee -a "${HOSTS_FILE}" > /dev/null
+        fi
+    done
+
+    NEW_STATE="BLOCKED"
+    STATE_COLOR="${RED}"
+    STATE_MSG="Apple software updates are now ${RED}${BOLD}BLOCKED${RESET}."
+    STATE_DETAIL="Your Mac cannot reach Apple's update servers."
+fi
+
+# ── Result ────────────────────────────────────────────────────────────────────
+echo ""
+echo -e "${BOLD}+----------------------------------------------+${RESET}"
+printf "${BOLD}|${RESET}  New state: ${STATE_COLOR}%-33s${RESET}${BOLD}|${RESET}\n" "${NEW_STATE}"
+echo -e "${BOLD}+----------------------------------------------+${RESET}"
+echo ""
+echo -e "  ${STATE_MSG}"
+echo -e "  ${STATE_DETAIL}"
+echo ""
+echo -e "  Domains affected:"
+for domain in "${APPLE_DOMAINS[@]}"; do
+    echo -e "    ${STATE_COLOR}•${RESET} ${domain}"
+done
+echo ""
+echo -e "  A backup of your previous hosts file was saved as:"
+echo -e "  ${BOLD}${HOSTS_FILE}.bak${RESET}"
+echo ""