Finds all the dependencies of a packages, and its deps' deps, and those deps' deps...

deps_finder.sh

#!/usr/bin/env bash
main_pkg="${1}";
arch="$(uname -i)"
deps_list=( ${main_pkg} );
declare -a master_pkg_list;
declare -a deps_list_additions;
echo "[INFO] Finding deps for main_pkg: ${main_pkg}";
while true; do
  for dep in ${deps_list[@]}; do
    if [[ "${dep}" != "${main_pkg}" ]]; then
      echo "[INFO] Finding deps for dep: ${dep}";
    fi
    dep_deps=( $(yum deplist ${dep} | grep -oP "(?<=(provider:\s)).*\.(${arch}|noarch)" | sort -u;) );
    deps_list_additions+=( ${dep_deps[@]} );
    deps_list_additions=( $(for item in ${deps_list_additions[@]}; do echo ${item}; done | sort -u) );
  done
  dep_count=$(for item in ${master_pkg_list[@]} ${deps_list_additions[@]}; do echo "${item}"; done | sort -u | wc -l;);
  if [[ "${#master_pkg_list[@]}" != "${dep_count}" ]]; then
    deps_list=( 
                $( 
                   for item in ${deps_list_additions[@]}; do 
                     echo "${master_pkg_list[@]}" | grep "${item}" > /dev/null || echo "${item}";
                   done | sort -u
                 ) 
              );
    master_pkg_list=( $(for item in ${master_pkg_list[@]} ${deps_list_additions[@]}; do echo "${item}"; done | sort -u;) );
    deps_list_additions=();
  else
    echo "[INFO] Found the following packages:"
    for pkg in ${main_pkg} ${master_pkg_list[@]}; do 
      echo "${pkg}";
    done
    exit 0;
  fi
done