#!/bin/bash
# Spareboot Mac checkup. Read only.
# Read this before you run it: https://spareboot.com/mac/check
# It prints a short block you can paste into that page.
# Reads: model id, macOS version, memory, CPU brand, free space on /,
# battery cycle count and condition, and the pending softwareupdate list.
# It does not print a serial number. It does not ask for an administrator password. It does not write a file.

macos=$(sw_vers -productVersion 2>/dev/null || true)
model=$(sysctl -n hw.model 2>/dev/null || true)
bytes=$(sysctl -n hw.memsize 2>/dev/null || echo 0)
case "$bytes" in
  ""|*[!0-9]*) bytes=0 ;;
esac
ram_gb=$((bytes / 1024 / 1024 / 1024))

brand=$(sysctl -n machdep.cpu.brand_string 2>/dev/null || true)
arm=$(sysctl -n hw.optional.arm64 2>/dev/null || echo 0)
chip=intel
if [ "$arm" = "1" ]; then
  chip=apple
fi
case "$brand" in
  *[Aa]pple*) chip=apple ;;
esac

disk=$(df -g / 2>/dev/null | awk 'NR==2 { print $4 }')

cycles=none
battery=none
if ioreg -rn AppleSmartBattery >/dev/null 2>&1; then
  raw=$(ioreg -rn AppleSmartBattery 2>/dev/null || true)
  cycles=$(printf '%s\n' "$raw" | awk -F'= ' '/"CycleCount"/ { gsub(/[^0-9]/, "", $2); print $2; exit }')
  battery=$(printf '%s\n' "$raw" | awk -F'= ' '/"BatteryHealthCondition"|"BatteryHealth"/ { gsub(/"/, "", $2); gsub(/^[ \t]+|[ \t]+$/, "", $2); if ($2 != "") { print $2; exit } }')
  if [ -z "$cycles" ]; then cycles=none; fi
  if [ -z "$battery" ]; then battery=none; fi
fi

updates=unknown
upd=$(softwareupdate -l 2>&1 || true)
if printf '%s\n' "$upd" | grep -q 'No new software available'; then
  updates=0
elif printf '%s\n' "$upd" | grep -q '^\*'; then
  updates=$(printf '%s\n' "$upd" | grep -c '^\*' || true)
fi

printf '%s\n' "Spareboot read this Mac. Paste the block below into the checkup page. Nothing was changed."
printf '%s\n' "SPAREBOOT-MAC 1"
printf '%s\n' "macos=${macos}"
printf '%s\n' "model=${model}"
printf '%s\n' "chip=${chip}"
printf '%s\n' "ram_gb=${ram_gb}"
printf '%s\n' "disk_free_gb=${disk}"
printf '%s\n' "battery_cycles=${cycles}"
printf '%s\n' "battery=${battery}"
printf '%s\n' "updates=${updates}"
printf '%s\n' "END"