#!/bin/sh

if [[ -z $1 ]]; then
  echo "$(basename "$0") <package file>"
  exit 1
fi

tmpdir=$(mktemp -d /tmp/find-sodeps.XXXXXXX)
trap "rm -rf '$tmpdir'" EXIT INT TERM

tar -C $tmpdir -xf "$1"

cd $tmpdir

in_array() {
	local needle=$1; shift
	[[ -z $1 ]] && return 1 # Not Found
	local item
	for item in "$@"; do
	[[ $item = $needle ]] && return 0 # Found
	done
	return 1 # Not Found
}

find . -type f -name \*.so\* | while read filename
do
  if readelf -h "$filename" 2>/dev/null | grep -q '.*Type:.*DYN (Shared object file).*'; then
    soarch=$(objdump -a "$filename" 2>/dev/null | sed -rn 's/.* file format (.*)$/\1/p' | tr - _)
    sofile=$(readelf -d "$filename" 2>/dev/null | sed -nr 's/.*Library soname: \[(.*)\].*/\1/p')
    [ -z "$sofile" ] && sofile="$(basename "$filename")"
    
    soname=$(sed -rn 's/(.*)\.so.*/\1.so/p' <<< "$sofile")
    if ! in_array "${soname}" ${soprovides[@]}; then
      echo "${soname}"
      soprovides=(${soprovides[@]} "${soname}")
    fi
  fi
done