#!/bin/bash
# Generates index.js from sources in destination directory
#
#  Copyright (C) 2014 LoVullo Associates, Inc.
#
#  This file is part of liza.
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.
##

shopt -s extglob nullglob

destpath="${1?Destination path required}"

cat <<EOH
/*** GENERATED BY gen-index; DO NOT MODIFY ***/

module.exports = {
EOH

declare -i i

# generate require for each module
for module in "$destpath"/!(index).js; do
  modname="$( basename "$module" .js )"

  # humor ECMAScript 3 for now
  if ((i++)); then
    echo ,
  fi

  echo -n "    get '$modname'() { return require( './$modname' ); }"
done

# include index.js for any sub-directories (namespace)
for dir in $( find "$destpath" -maxdepth 1 -mindepth 1 -type d ); do
  ns=$( basename "$dir" )

  # humor ECMAScript 3 for now
  if ((i++)); then
    echo ,
  fi

  echo -n "    get '$ns'() { return require('./$ns'); }"
done

echo -e "\n};"