#!/bin/sh
if [ $# -eq 0 ] || [ "$1" = "--help" ] || [ "$1" = "-h" ]; then
  echo "Usage: `basename $0` [options] [.exs file] [data]

  -v                Prints version and exit
  -e \"command\"      Evaluates the given command (*)
  -r \"file\"         Requires the given files/patterns (*)
  -S \"script\"       Finds and executes the given script (*)
  -pr \"file\"        Requires the given files/patterns in parallel (*)
  -pa \"path\"        Prepends the given path to Erlang code path (*)
  -pz \"path\"        Appends the given path to Erlang code path (*)
  --app \"app\"       Start the given app and its dependencies (*)
  --erl \"switches\"  Switches to be passed down to erlang (*)
  --name \"name\"     Makes and assigns a name to the distributed node
  --sname \"name\"    Makes and assigns a short name to the distributed node
  --cookie \"cookie\" Sets a cookie for this distributed node
  --hidden          Makes a hidden node
  --detached        Starts the Erlang VM detached from console
  --no-halt         Does not halt the Erlang VM after execution

** Options marked with (*) can be given more than once
** Options given after the .exs file or -- are passed down to the executed code
** Options can be passed to the erlang runtime using ELIXIR_ERL_OPTS or --erl" >&2
  exit 1
fi

readlink_f () {
  cd "$(dirname "$1")" > /dev/null
  filename="$(basename "$1")"
  if [ -h "$filename" ]; then
    readlink_f "$(readlink "$filename")"
  else
    echo "`pwd -P`/$filename"
  fi
}

ERL=""
I=1

while [ $I -le $# ]; do
  S=1
  eval "PEEK=\${$I}"
  case "$PEEK" in
    -v|--compile|--no-halt|+iex|+compile)
        ;;
    -e|-r|-pr|-pa|-pz|--remsh|--app)
        S=2
        ;;
    --detached|--hidden)
        ERL="$ERL `echo $PEEK | cut -c 2-`"
        ;;
    --cookie)
        I=$(expr $I + 1)
        eval "VAL=\${$I}"
        ERL="$ERL -setcookie "$VAL""
        ;;
    --sname|--name)
        I=$(expr $I + 1)
        eval "VAL=\${$I}"
        ERL="$ERL `echo $PEEK | cut -c 2-` "$VAL""
        ;;
    --erl)
        I=$(expr $I + 1)
        eval "VAL=\${$I}"
        ERL="$ERL "$VAL""
        ;;
    *)
        break
        ;;
  esac
  I=$(expr $I + $S)
done

SELF=$(readlink_f "$0")
SCRIPT_PATH=$(dirname "$SELF")

if [ -f "$HOME/.elixirrc" ]; then . "$HOME/.elixirrc"; fi
if [ "$ELIXIR_NO_CLI" != "1" ]; then ERL="$ERL -s elixir start_cli"; fi

if [ -f "$SCRIPT_PATH/../releases/RELEASES" ] && [ -f "$SCRIPT_PATH/erl" ]
then
  exec "$SCRIPT_PATH"/erl -pa "$SCRIPT_PATH"/../lib/*/ebin -noshell $ELIXIR_ERL_OPTS $ERL -boot start -extra "$@"
else
  exec erl -pa "$SCRIPT_PATH"/../lib/*/ebin -noshell $ELIXIR_ERL_OPTS $ERL -extra "$@"
fi