# SPDX-License-Identifier: CC0-1.0

{ stdenv, nixpkgs, dhallApps }:

with nixpkgs.buildPackages;

writeScriptBin "generate-manifest" ''
  #!${runtimeShell}
  root="$1"
  if [ -z "$root" ]; then
    echo a directory must be passed as an argument >> /dev/stderr
    exit 1
  fi
  if [ ! -d "$root" ]; then
    echo \'$root\' is not an existing directory >> /dev/stderr
    exit 1
  fi
  set -eu
  find="${findutils}/bin/find"
    echo -n '{'
    if [ -d "$root/bin" ]; then
      echo -n ',bin = {'
      find $root/bin/ -type f -printf '%f "%p"\n' \
        | awk '{print ", "gensub(/\..*/, "", 1, $1)"={mapKey= \""$1"\",mapValue ="$2"}"}'
      echo -n '}'
    fi
    if [ -d "$root/lib" ]; then
      echo -n ',lib = {'
      find $root/lib/ -type f -name '*.lib.so' -printf '%f "%p"\n' \
        | awk '{print ", "gensub(/\..*/, "", 1, $1)"={mapKey=\""$1"\",mapValue="$2"}"}'
      echo -n '}'
    fi
    if [ -d "$root/tar" ]; then
      echo -n ',tar = {'
      find $root/tar/ -type f -name '*.tar' -printf '%f "%p"\n' \
        | awk '{print ""gensub(/\..*/, "", 1, $1)"={mapKey=\""$1"\",mapValue="$2"}" }'
      echo -n '}'
    fi
    echo '}'
''