#!/bin/bash
# This launcher script is not part of Emacs proper. It is from the
# build-emacs-for-macos project (https://github.com/jimeh/build-emacs-for-macos)
# and helps facilitate proper startup of Emacs with environment varibales set as
# needed.
#
# Licensed under CC0 1.0 Universal:
# https://creativecommons.org/publicdomain/zero/1.0/
#
set -e

resolve_link() {
  local file="$1"

  while [ -L "$file" ]; do
    file="$(readlink "$file")"
  done

  echo "$file"
}

realname() {
  local path="$1"
  local resolved
  local cwd

  cwd="$(pwd)"
  resolved="$(resolve_link "$path")"
  cd "$(dirname "$resolved")"
  echo "$(pwd)/$(basename "$resolved")"
  cd "$cwd"
}

join() {
  local IFS="$1"
  local parts=()
  shift

  for arg in "$@"; do
    if [ "$arg" != "" ]; then
      parts+=("$arg")
    fi
  done

  echo "${parts[*]}"
}

DIR="$(dirname "$(realname "$0")")"
BIN="${DIR}/Emacs<%= bin_suffix %>"

export PATH="${DIR}/bin:${DIR}/libexec:${PATH}"
<% if library_paths.any? %>
LIB_PATHS=(
  '<%= library_paths.map { |p| p.gsub('\'', "\"'\"") }.join("'\n  '") %>'
)
for lib in "${LIB_PATHS[@]}"; do
  if [ -d "${DIR}/<%= lib_dir_name %>/${lib}" ]; then
    libs="$(join : "$libs" "${DIR}/<%= lib_dir_name %>/${lib}")"
  fi
done

LIBRARY_PATH="$(join : "$libs" "$LIBRARY_PATH")"
export LIBRARY_PATH
<% end %>
exec "$BIN" "$@"