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#autoload

# Find paths of applications and preserve them into _mac_apps.
# Used by _mac_applications and _mac_files_for_application.

_mac_apps_caching_policy () {
   # Rebuild if cache is more than a day old
   oldp=( "$1"(Nmw+1) )
   (( $#oldp ))
}

_retrieve_mac_apps() {
  local cache_policy
  zstyle -s ":completion:*:*:$service:*" cache-policy cache_policy
  if [[ -z "$cache_policy" ]]; then
    zstyle ":completion:*:*:$service:*" cache-policy _mac_apps_caching_policy
  fi

  if ( [[ ${+_mac_apps} -eq 0 ]] || _cache_invalid Mac_applications ) \
        && ! _retrieve_cache Mac_applications; then

    # Get directories which may contain applications
    typeset -aU app_dir 
    if [[ -z "$app_dir" ]] && \
      ! zstyle -s ":completion:${curcontext}:commands" application-dir app_dir
    then
      typeset -a app_dir_stop_pattern app_dir_root
      app_dir_stop_pattern=( "*.app" "contents#" "*data" "*plugins#" "*plug?ins#" "fonts#" "document[[:alpha:]]#" "*help" "resources#" "images#" "*configurations#" )
      app_dir_root=( {,/Developer,/Network,"$HOME"}/{Applications*(N),Desktop} )
      typeset app_dir_pattern
      app_dir_pattern="(^(#i)(${(j/|/)app_dir_stop_pattern}))"
      app_dir=( ${^app_dir_root}/(${~app_dir_pattern}/)#(N) )
    fi

    typeset -g -Ua _mac_apps
    local -a app_result

    # Get application bundles
    if ! zstyle -t ":completion:${curcontext}:commands" ignore-bundle; then
      app_result=( ${^app_dir}*/Contents/(MacOS|MacOSClassic)(N) )
      _mac_apps+=( ${app_result[@]%/Contents/MacOS*} )
    fi

    # Get single file applications
    if ! zstyle -t ":completion:${curcontext}:commands" ignore-single; then
      autoload -U zargs
      local app_cand nargs envvars
      app_cand=( ${^app_dir}^*.[a-z]#/..namedfork/rsrc(.UrN,.RN^U) )
      envvars="$(builtin typeset -x)"
      nargs=$(( $(command sysctl -n kern.argmax) - $#envvars - 2048 ))
      app_result="$(zargs --max-chars $nargs ${app_cand[@]} -- grep -l APPL)"
      _mac_apps+=( ${${(f)app_result}%/..namedfork/rsrc} )
    fi

    _store_cache Mac_applications _mac_apps
  fi
}

_retrieve_mac_apps "$@"