add release script to dmg

scripts/build-release-dmg.sh

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+APP_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+PROJECT_DIR="$APP_ROOT/CommandNotch"
+
+if ! command -v xcodegen >/dev/null 2>&1; then
+  echo "error: xcodegen is required. Install it with: brew install xcodegen" >&2
+  exit 1
+fi
+
+if ! command -v create-dmg >/dev/null 2>&1; then
+  echo "error: create-dmg is required. Install it with: brew install create-dmg" >&2
+  exit 1
+fi
+
+timestamp="$(date '+%Y-%m-%d %H-%M-%S')"
+release_dir="$APP_ROOT/releases/CommandNotch $timestamp"
+archive_path="/tmp/CommandNotch-$timestamp.xcarchive"
+staging_dir="$(mktemp -d)"
+app_path="$release_dir/CommandNotch.app"
+dmg_path="$release_dir/CommandNotch.dmg"
+
+cleanup() {
+  rm -rf "$staging_dir"
+}
+
+trap cleanup EXIT
+
+mkdir -p "$release_dir"
+
+cd "$PROJECT_DIR"
+xcodegen generate --spec project.yml
+
+DEVELOPER_DIR="${DEVELOPER_DIR:-/Applications/Xcode.app/Contents/Developer}" \
+  xcodebuild archive \
+    -project CommandNotch.xcodeproj \
+    -scheme CommandNotch \
+    -configuration Release \
+    -destination 'generic/platform=macOS' \
+    -archivePath "$archive_path"
+
+ditto "$archive_path/Products/Applications/CommandNotch.app" "$app_path"
+ditto "$app_path" "$staging_dir/CommandNotch.app"
+ln -s /Applications "$staging_dir/Applications"
+
+create-dmg \
+  --volname "CommandNotch" \
+  --window-pos 200 120 \
+  --window-size 720 420 \
+  --icon-size 128 \
+  --icon "CommandNotch.app" 180 210 \
+  --icon "Applications" 540 210 \
+  --hide-extension "CommandNotch.app" \
+  --app-drop-link 540 210 \
+  "$dmg_path" \
+  "$staging_dir"
+
+echo "Created:"
+echo "  $app_path"
+echo "  $dmg_path"