#!/bin/bash
# simple local copy wintin or merge one directory to another using rsync.  Preserves everything
# present working directory to supplied destination

isDir() {
    if [[ -d $1 ]]
    then
        echo "true"
        return 0
    else
        return 1
    fi
}

function dir_copy () {

  [[ ! $(which rsync) ]] && { echo rsync must be installed to use this function; return 5; }
  module_load confirm
  local usesudo;local cmd;local src;local noconfirm;local merge

  declare OPTION
  declare OPTARG
  declare OPTIND
  while getopts 'sem' OPTION; do
  case "$OPTION" in
    s)
      usesudo=true
      ;;
    e)
      noconfirm=true
      ;;
    m)
      merge=true
      ;;
      *)
      echo unknown option $OPTION
      return 1
      ;;
  esac
  done

shift $(( OPTIND - 1 ))

[ $# -ne 2 ] && echo two directories source and destination need to be passed && return 2
src=$(realpath -s $1)
dest=$(realpath -s $2)
[ ! -d "$src" ] && echo source: $src is not a directory && return 3
[[ $merge ]] && src=${src}/
cmd="$usesudo rsync --exclude *[C]ache* --exclude node_modules --progress -aAru $src $dest"
echo $cmd
[[ ! -v PS1 ]] && noconfirm=true
[[ ! $noconfirm ]] && { confirm Do you want to $([[ $merge ]] && echo merge $src into || echo copy $src within) $dest? || return 0; }
echo copying.....
eval $cmd
}