#!/usr/bin/env bash
set -e

resolve_link() {
  $(type -p greadlink readlink | head -1) $1
}

abs_dirname() {
  local cwd="$(pwd)"
  local path="$1"

  while [ -n "$path" ]; do
    cd "${path%/*}"
    local name="${path##*/}"
    path="$(resolve_link "$name" || true)"
  done

  pwd
  cd "$cwd"
}

usage() {
  echo "usage: ruby-package <command> [<args>]" >&2
  exit 1
}

bin_dir="$(abs_dirname "$0")"
export PATH="${bin_dir}/../libexec:${bin_dir}:$PATH"

command="$1"
command_path="$(command -v ruby-package-"$1" || true)"

if [ -z "$TMPDIR" ]; then
  export TMPDIR="/tmp"
else
  export TMPDIR="${TMPDIR%/}"
fi

if [ -z "$command" ]; then
  usage
elif [ -z "$command_path" ]; then
  echo "ruby-package: ${command}: command not found" >&2
  usage
fi

shift
exec "$command_path" "$@"