log print for shell

log.sh

set_force_check() {
  export force_check=1
  if [ x"$1" = x"0" ]; then
    force_check=0
  fi
}

print_stack() {
  local wholepath=$1
  # to avoid noise we start with 2 to skip get_stack caller
  local i
  local stack_size=${#FUNCNAME[@]}
  echo -e "<--- Call Stack -->" >&2
  for (( i=2; i<$stack_size ; i++ )); do
    local func="${FUNCNAME[$i]}"
    [ x$func = x ] && func=MAIN
    local linen="${BASH_LINENO[(( i - 1 ))]}"
    local src="${BASH_SOURCE[$i]}"
    [ x"$src" = x ] && src=non_file_source

    if [ -n "$wholepath" ]; then
      echo -e "  $((i-1))>  $func:"
      echo -e "  $src:$linen" >&2
    else
      src=${src##*/}
      echo -e "  $((i-1))>  $func:  $src:$linen" >&2
    fi
  done
}

log_err() {
  local callidx=0
  echo -e "\033[31;1m[E]\033[0m $1" >&2

  print_stack
  exit 1
}

log_warn() {
  echo -e "\033[33;1m[W]\033[0m $1" >&2
  if [ -n "$force_check" ]; then
    if [ $force_check -eq 1 ]; then
      print_stack
      exit 1
    fi
  fi
}

log_info() {
  echo -e "\033[32;1m[I]\033[0m $1" >&2
}

log_result() {
  local msg="$1"
  if [[ "$msg" =~ ^[0-9]+$ ]]; then
    if [ $msg -eq 0 ]; then
      printf "\033[32;1mOK\033[0m\n"
      return 0
    else
      printf "\033[31;1mFAILED\033[0m\n"
      return 1
    fi
  else
    printf "\033[32;1m[I]\033[0m $msg ... "
  fi
}