#!/usr/bin/env bash

###########################################################################
#   Copyright (C) 2012 by Simon Dales   #
#   simon@purrsoft.co.uk   #
#                                                                         #
#   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 2 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, write to the                         #
#   Free Software Foundation, Inc.,                                       #
#   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             #
###########################################################################
LANG=""

##! \brief test executable to see if it exists
test_executable() {
  P_EXE="$1"
  #########
  WHICH=$(which "$P_EXE")
  if test -z "${WHICH}"; then
    echo "not found \"${P_EXE}\""
  else
    EXE="${P_EXE}"
  fi
}

##! \brief sets the lua interpreter
set_lua() {
  if test -z "${EXE}"; then
    test_executable '.deps/usr/bin/luajit'
  fi

  if test -z "${EXE}"; then
    test_executable 'luajit'
  fi

  if test -z "${EXE}"; then
    test_executable 'lua'
  fi
}

##! \brief makes canonical name of file
##!
##! Note that "readlink -f" doesn't work in MacOSX
##!
do_readlink() {
  pushd . > /dev/null
  TARGET_FILE=$1

  cd "$(dirname $TARGET_FILE)"
  TARGET_FILE=$(basename "$TARGET_FILE")

  # Iterate down a (possible) chain of symlinks
  while [ -L "$TARGET_FILE" ]; do
    TARGET_FILE=$(readlink "$TARGET_FILE")
    cd $(dirname "$TARGET_FILE")
    TARGET_FILE=$(basename "$TARGET_FILE")
  done

  PHYS_DIR=$(pwd -P)
  RESULT=$PHYS_DIR
  popd > /dev/null
}

##main
set_lua
if test -z "${EXE}"; then
  echo "no lua interpreter found"
  exit 1
else
  BASENAME=$(basename "$0")
  do_readlink "$0"
  DIRNAME="${RESULT}"

  LUASCRIPT="${DIRNAME}/lua2dox.lua ${BASENAME}"
  #echo "lua[${LUASCRIPT}]"

  ${EXE} ${LUASCRIPT} $@
fi

##eof