native macOS codings agent orchestrator prowl.onev.cat
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1234567891011121314151617181920#!/usr/bin/env bash
# Conversion removes the image signature. Sign the output before notarization.set -euo pipefail
if [[ "$#" -ne 2 ]]; then echo "Usage: recompress-dmg.sh SOURCE.dmg OUTPUT.dmg" >&2 exit 2fi
source_image="$1"output_image="$2"temporary_dir="$(mktemp -d "$(dirname "$output_image")/.dmg-compression.XXXXXX")"trap 'rm -rf "$temporary_dir"' EXIT
# ULMO uses LZMA and is supported by every macOS version that Prowl supports.# Keep the previous output intact if conversion fails or is interrupted.hdiutil convert "$source_image" -format ULMO -o "$temporary_dir/Prowl.dmg"mv -f "$temporary_dir/Prowl.dmg" "$output_image"