#!/bin/bash

cd "$(dirname "$0")"

machineReadable=false
unset provided

while [ $# -gt 0 ]; do

  if [ "x$1" = 'x-m' ]; then
    machineReadable=true
  elif [ -f "$1" ]; then
    provided="$1"
  else
    >&2 printf 'unknown option "%s"\n' "$1"
  fi

  shift

done

if [ -z "${provided}" ]; then
  provided=$("./liste-verfuegbare-Versionen")
  trap 'rm -f "${provided}"' EXIT
fi

join -1 1 -2 2 -v 2 <(
  awk '{print $2 "=" $1}' <"${provided}" \
  | sort -u
) <(
  for pkgbuild in */PKGBUILD; do
    sed -n '
      /^\s*_pinned_dependencies[^[:space:]=]*=([^)]*$/,/)/p
      /^\s*_pinned_dependencies[^[:space:]=]*=([^)]*)/p
    ' "${pkgbuild}" \
    | sed '
      s/^\s*_pinned_dependencies[^[:space:]=]*=(//
      s/).*$//
    ' \
    | tr '[:space:]' '\n' \
    | sort -u \
    | grep -vxF '' \
    | sed '
      s@^\(['"'"'"]\)\(\S\+\)\1$@\2@
      /^glibc>=/d
      s@^@'"${pkgbuild%/*}"' @
    '
  done \
  | sort -k2,2
) \
| if ${machineReadable}; then
  cut -d' ' -f2
else
  while read -r dep pkg; do
    printf '%s: %s\n' "${pkg}" "${dep}"
  done
fi