set -euo pipefail

shopt -s nullglob

bundle_short_version() {

local app="$1"

/usr/libexec/PlistBuddy -c 'Print :CFBundleShortVersionString' "$app/Contents/Info.plist" 2>/dev/null || true

}

declare -a candidates=(/Applications/Xcode_[0-9]*.app)

[[ -d /Applications/Xcode.app ]] && candidates+=(/Applications/Xcode.app)

best_app=""

best_ver="0.0.0"

for app in "${candidates[@]}"; do

[[ -d "$app" ]] || continue

ver="$(bundle_short_version "$app")"

[[ -n "$ver" ]] || continue

hi="$(printf '%s\n' "$best_ver" "$ver" | sort -V | tail -n 1)"

if [[ "$hi" == "$ver" ]]; then

best_ver="$ver"

best_app="$app"

fi

if [[ -z "$best_app" ]]; then

echo "::error::No usable Xcode under /Applications (need Xcode_[0-9]*.app or Xcode.app with Info.plist)."

ls -la /Applications/Xcode*.app 2>/dev/null || true

exit 1

echo "Using: $best_app (CFBundleShortVersionString=$best_ver)"

sudo xcode-select -s "$best_app"

xcodebuild -version