#!/usr/bin/env bash codexbar_resolve_sparkle_version_child() {  local versions_dir="$1"  local candidate="$2"  local label="$3"  local versions_root resolved   versions_root=$(cd "$versions_dir" && pwd -P)  if ! resolved=$(cd "$candidate" 2>/dev/null && pwd -P); then    echo "ERROR: Sparkle ${label} does not resolve: ${candidate}" >&2    return 1  fi  if [[ "$(dirname "$resolved")" != "$versions_root" ]]; then    echo "ERROR: Sparkle ${label} resolves outside the framework versions directory: ${candidate}" >&2    return 1  fi   printf '%s\n' "$resolved"} codexbar_sparkle_version_dir() {  local sparkle="$1"  local versions_dir="${sparkle}/Versions"   if [[ -L "$sparkle" ]]; then    echo "ERROR: Sparkle framework root must not be a symlink: ${sparkle}" >&2    return 1  fi  if [[ -L "$versions_dir" ]]; then    echo "ERROR: Sparkle versions directory must not be a symlink: ${versions_dir}" >&2    return 1  fi  if [[ ! -d "$versions_dir" ]]; then    echo "ERROR: Missing Sparkle versions directory: ${versions_dir}" >&2    return 1  fi   if [[ -e "$versions_dir/Current" || -L "$versions_dir/Current" ]]; then    local current    if ! current=$(codexbar_resolve_sparkle_version_child "$versions_dir" "$versions_dir/Current" "Versions/Current"); then      return 1    fi    printf '%s\n' "$current"    return  fi   local version_dirs=()  local candidate  shopt -s nullglob  for candidate in "$versions_dir"/*; do    if [[ -d "$candidate" ]]; then      version_dirs+=("$candidate")    fi  done  shopt -u nullglob   case "${#version_dirs[@]}" in    0)      echo "ERROR: Sparkle framework has no version directory under: ${versions_dir}" >&2      return 1      ;;    1)      local resolved      if ! resolved=$(codexbar_resolve_sparkle_version_child \        "$versions_dir" "${version_dirs[0]}" "version directory"); then        return 1      fi      printf '%s\n' "$resolved"      ;;    *)      echo "ERROR: Sparkle framework has multiple version directories and no Versions/Current symlink: ${versions_dir}" >&2      return 1      ;;  esac} codexbar_require_sparkle_signing_target() {  local path="$1"  local label="$2"  local trusted_root="$3"  local resolved trusted_root_resolved   if [[ -L "$path" ]]; then    echo "ERROR: Sparkle signing target must not be a symlink (${label}): ${path}" >&2    return 1  fi   if [[ ! -e "$path" ]]; then    echo "ERROR: Missing Sparkle signing target (${label}): ${path}" >&2    return 1  fi   if ! trusted_root_resolved=$(cd "$trusted_root" 2>/dev/null && pwd -P); then    echo "ERROR: Sparkle signing root does not resolve (${label}): ${trusted_root}" >&2    return 1  fi  if [[ -d "$path" ]]; then    resolved=$(cd "$path" && pwd -P)  else    resolved="$(cd "$(dirname "$path")" && pwd -P)/$(basename "$path")"  fi  if [[ "$resolved" != "$trusted_root_resolved" &&    "${resolved#"$trusted_root_resolved"/}" == "$resolved" ]]; then    echo "ERROR: Sparkle signing target resolves outside its trusted root (${label}): ${path}" >&2    return 1  fi   printf '%s\n' "$resolved"} codexbar_sparkle_signing_targets() {  local sparkle="$1"  local version_dir  if ! version_dir=$(codexbar_sparkle_version_dir "$sparkle"); then    return 1  fi   codexbar_require_sparkle_signing_target "$sparkle" "framework root" "$sparkle" || return 1  codexbar_require_sparkle_signing_target "$version_dir/Sparkle" "framework binary" "$version_dir" || return 1  codexbar_require_sparkle_signing_target "$version_dir/Autoupdate" "autoupdate tool" "$version_dir" || return 1  codexbar_require_sparkle_signing_target "$version_dir/Updater.app" "updater app" "$version_dir" || return 1  codexbar_require_sparkle_signing_target \    "$version_dir/Updater.app/Contents/MacOS/Updater" "updater executable" "$version_dir" || return 1  codexbar_require_sparkle_signing_target \    "$version_dir/XPCServices/Downloader.xpc" "downloader xpc" "$version_dir" || return 1  codexbar_require_sparkle_signing_target \    "$version_dir/XPCServices/Downloader.xpc/Contents/MacOS/Downloader" \    "downloader executable" "$version_dir" || return 1  codexbar_require_sparkle_signing_target \    "$version_dir/XPCServices/Installer.xpc" "installer xpc" "$version_dir" || return 1  codexbar_require_sparkle_signing_target \    "$version_dir/XPCServices/Installer.xpc/Contents/MacOS/Installer" \    "installer executable" "$version_dir" || return 1  codexbar_require_sparkle_signing_target "$version_dir" "framework version" "$version_dir" || return 1  codexbar_require_sparkle_signing_target "$sparkle" "framework root" "$sparkle" || return 1}