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perf(dmg): shrink rw image before lzma convert

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This commit is contained in:
Peter Steinberger
2025-12-20 19:44:08 +00:00
parent abf05af474
commit fb9c1f7e65
1 changed files with 11 additions and 0 deletions
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11
scripts/create-dmg.sh
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@@ -15,6 +15,7 @@ set -euo pipefail
# DMG_APP_POS default: "125 160"
# DMG_APPS_POS default: "375 160"
# SKIP_DMG_STYLE=1 skip Finder styling
# DMG_EXTRA_SECTORS extra sectors to keep when shrinking RW image (default: 2048)
APP_PATH="${1:-}"
OUT_PATH="${2:-}"
@@ -44,6 +45,7 @@ DMG_WINDOW_BOUNDS="${DMG_WINDOW_BOUNDS:-400 100 900 420}"
DMG_ICON_SIZE="${DMG_ICON_SIZE:-128}"
DMG_APP_POS="${DMG_APP_POS:-125 160}"
DMG_APPS_POS="${DMG_APPS_POS:-375 160}"
DMG_EXTRA_SECTORS="${DMG_EXTRA_SECTORS:-2048}"
to_applescript_list4() {
local raw="$1"
@@ -158,6 +160,15 @@ for i in {1..5}; do
sleep 2
done
hdiutil resize -limits "$DMG_RW_PATH" >/tmp/clawdis-dmg-limits.txt 2>/dev/null || true
MIN_SECTORS="$(tail -n 1 /tmp/clawdis-dmg-limits.txt 2>/dev/null | awk '{print $1}')"
rm -f /tmp/clawdis-dmg-limits.txt
if [[ "$MIN_SECTORS" =~ ^[0-9]+$ ]] && [[ "$DMG_EXTRA_SECTORS" =~ ^[0-9]+$ ]]; then
TARGET_SECTORS=$((MIN_SECTORS + DMG_EXTRA_SECTORS))
echo "Shrinking RW image: min sectors=$MIN_SECTORS (+$DMG_EXTRA_SECTORS) -> $TARGET_SECTORS"
hdiutil resize -sectors "$TARGET_SECTORS" "$DMG_RW_PATH" >/dev/null 2>&1 || true
fi
hdiutil convert "$DMG_RW_PATH" -format ULMO -o "$OUT_PATH" -ov
rm -f "$DMG_RW_PATH"