#!/usr/bin/env bashset -euo pipefail ICON_FILE=${1:-Icon.icon}BASENAME=${2:-Icon}OUT_ROOT=${3:-build/icon}XCODE_APP=${XCODE_APP:-/Applications/Xcode.app} ICTOOL="$XCODE_APP/Contents/Applications/Icon Composer.app/Contents/Executables/ictool"if [[ ! -x "$ICTOOL" ]]; then  ICTOOL="$XCODE_APP/Contents/Applications/Icon Composer.app/Contents/Executables/icontool"fiif [[ ! -x "$ICTOOL" ]]; then  echo "ictool/icontool not found. Set XCODE_APP if Xcode is elsewhere." >&2  exit 1fi ICONSET_DIR="$OUT_ROOT/${BASENAME}.iconset"TMP_DIR="$OUT_ROOT/tmp"mkdir -p "$ICONSET_DIR" "$TMP_DIR" MASTER_ART="$TMP_DIR/icon_art_824.png"MASTER_1024="$TMP_DIR/icon_1024.png" # Render inner art (no margin) with macOS Default appearance"$ICTOOL" "$ICON_FILE" \  --export-preview macOS Default 824 824 1 -45 "$MASTER_ART" # Pad to 1024x1024 with transparent bordersips --padToHeightWidth 1024 1024 "$MASTER_ART" --out "$MASTER_1024" >/dev/null # Generate required sizessizes=(16 32 64 128 256 512 1024)for sz in "${sizes[@]}"; do  out="$ICONSET_DIR/icon_${sz}x${sz}.png"  sips -z "$sz" "$sz" "$MASTER_1024" --out "$out" >/dev/null  if [[ "$sz" -ne 1024 ]]; then    dbl=$((sz*2))    out2="$ICONSET_DIR/icon_${sz}x${sz}@2x.png"    sips -z "$dbl" "$dbl" "$MASTER_1024" --out "$out2" >/dev/null  fidone # 512x512@2x already covered by 1024; ensure it existscp "$MASTER_1024" "$ICONSET_DIR/icon_512x512@2x.png" iconutil -c icns "$ICONSET_DIR" -o Icon.icns echo "Icon.icns generated at $(pwd)/Icon.icns"