Compute depends array for PKGBUILDs

pkgbuild-depends

#!/usr/bin/zsh

# Usage: pkgbuild-depends /path/to/elf1 /path/to/elf2...
#        pkgbuild-depends -p package

while getopts 'p:m' opt; do
  case $opt in
    p)
      files=($(pacman -Ql $OPTARG | cut -d' ' -f2))
      ;;
    m)
      repos=(multilib alucryd-multilib)
      ;;
  esac
done

shift $((OPTIND-1))

[[ -z $files ]] && files=($@)
[[ -z $repos ]] && repos=(core extra community alucryd pantheon)

blacklist=(dropbox gcc-libs-multilib openstack-guest-agents-unix plex-media-server teamviewer vagrant)
libs=($(readelf -d ${files[@]} 2>/dev/null | grep 'Shared library' | sort | uniq | sed 's/.*\[\(.*\)\]/\1/'))

for lib in ${libs[@]}; do
  echo "Looking for $lib"
  if [[ $lib == libGL.so.* || $lib == libEGL.so.* ]]; then
    if [[ $repos[1] == multilib ]]; then
      echo "Found in lib32-libgl"
      depends+=(lib32-libgl)
    else
      echo "Found in libgl"
      depends+=(libgl)
    fi
  else
    if [[ -n $(pacman -Ss ${lib/.so*/.so}) ]]; then
      echo "Found ${lib/so*/so}"
      depends+=(${lib/so*/so})
    else
      for repo in ${repos[@]}; do
        pkgs=($(pkgfile -R $repo $lib | sed "s/$repo\///"))
        for pkg in ${pkgs[@]}; do
          echo "Found in $pkg"
          needed=true
          for pkg_bl in ${blacklist[@]}; do
            if [[ $pkg == $pkg_bl ]]; then
              needed=false
            fi
          done
          if [[ $needed == true ]]; then
            depends+=($pkg)
          fi
        done
      done
    fi
  fi
  echo ""
done

sortdeps() {
  for d in ${depends[@]}; do
    echo $d;
  done | sort | uniq
}

depends=($(sortdeps))
depends="('$(echo ${(o)depends} | sed "s/ /\' \'/g")')"
echo "depends=$depends"