#! /bin/bash
set -e
# build/znc-1.8.1-2.fc33.src.rpm.rpms
which readelf >/dev/null
for rpms in "$@";do
  srcrpm="${rpms%.rpms}"
  if [ "$rpms" = "$srcrpm" ];then
    echo >&2 "$rpms is not *.rpms"
    exit 1
  fi
  if [ "$srcrpm" != "${srcrpm%.dt5.rpm}" ];then
    # The non-.dt5.rpm run will handle both.
    exit 0
  fi
  test -e $srcrpm.rpms
  test -e $srcrpm.dt5.rpm.rpms
  test ! -e $srcrpm.dtneeded
  test ! -e $srcrpm.rpms.d
  t=/tmp/dtneededsizerpms.$$
  rm -f $t
  mkdir $srcrpm.rpms.d
  pushd $srcrpm.rpms.d >/dev/null
    rpmsbase=../../`basename $srcrpm`
    dwzrpms=$rpmsbase.rpms
    dtrpms=$rpmsbase.dt5.rpm.rpms
    mkdir empty
    cd empty
      if [ -z "$(find $dwzrpms $dtrpms -maxdepth 1 -type f)" ];then
	popd >/dev/null
	rm -rf $srcrpm.rpms.d
	exit 0
      fi
    cd ..
    function extract
    {
      for i in $1/*-debuginfo*.rpm;do
	test ! -e $i.tgz
	rpm2archive $i
	test -e $i.tgz
	tar xzf $i.tgz
	rm -f $i.tgz
      done
    }
    mkdir dwz;(cd dwz;extract $dwzrpms)
    mkdir  dt;(cd  dt;extract  $dtrpms)
    dwzcommonname="$(find dwz/usr/lib/debug/.dwz/ -type f 2>/dev/null || :)"
    if [ -z "$dwzcommonname" ];then
      dwzcommonname="nodwzcommon"
      dwzcommon=0
    else
      dwzcommon="$(find "$dwzcommonname" -maxdepth 0 -printf "%s")"
      echo >>$t "$dwzcommonname isdwzcommon $dwzcommon NA"
    fi
    pushd dwz >/dev/null
      for i in `find -type f -name "*.debug*"`;do
	dwz=$(find $i      -maxdepth 0 -printf "%s")
	dt=$(find ../dt/$i -maxdepth 0 -printf "%s")
	if readelf -WS $i 2>/dev/null|fgrep -q .gnu_debugaltlink;then
	  if [ $dwzcommon -eq 0 ];then
	    echo >&2 Excessive .gnu_debugaltlink: $i
	    exit 1
	  fi
	fi
	echo >>$t "$(echo "$i"|sed 's/\.debug$//') $dwzcommonname $dwz $dt"
      done
    popd >/dev/null
  popd >/dev/null
  rm -rf $srcrpm.rpms.d
  mv $t $srcrpm.dtneeded
done