#!/bin/bash

name="debom"
version="1.1"
read -r -d '' help_message <<-EOF
	Remove BOM from a target file
	Usage: debom TARGET [OPTIONS]
	Options:
	 -h, --help            print this message
	 -q, --quiet           suppress error messages and prompts
	 -v, --verbose         show additional messages
	 -V, --version         print version number and exit
EOF

source /usr/local/lib/mylib.bash

positional=()
quiet=0
verbose=0
while [[ $# -gt 0 ]]; do
  case "$1" in

  -h|--help)
    help_msg
    shift
    ;;

  -q|--quiet)
    debug_msg "Setting quiet option to 1 (was ${quiet})"
    quiet=1
    shift
    ;;

  -v|--verbose)
    debug_msg "Setting verbose option to 1 (was ${verbose})"
    verbose=1
    shift
    ;;

  -V|--version)
    version_msg
    ;;

  *)
    debug_msg "Argument '${1}' added to positional array"
    positional+=("$1")
    shift
    ;;
  esac
done

# error if no filenames given
if [[ ${#positional[@]} -eq 0 ]]; then
  usage_msg
fi

code=0
for filename in "${positional[@]}"; do
  if [ ! -f "$filename" ]; then
    nonfatal_error_msg "No such file '$filename'"
    code=1
  elif ! /usr/bin/sed '1s/^\xEF\xBB\xBF//' < "${filename}" 2>/dev/null; then
    code=1
  fi
done

exit "$code"