bash引数解析サンプル

parse_args_sample.sh

declare -i argc=0
declare -a argv=()
while (( $# > 0 )); do
  case "$1" in
    - | -- )
      shift
      argc+=$#
      argv+=("$@")
      break
      ;;
    --* )
      opt_name="${1#--}"
      opt_name="${opt_name%%=*}"

      delim_by_space=true
      if [[ "$1" =~ = ]]; then
        delim_by_space=false
        opt_value="${1#*=}"
      fi
      case "$opt_name" in
        'help' )
          usage_exit
          ;;
        'tag' )
          OPT_TAGS+=("${opt_value:-$2}")
          ($delim_by_space) && shift
          ;;
        'enable-a' )
          OPT_A=1
          ;;
      esac
      unset opt_value
      ;;
    -* )
      for (( i=1; i < ${#1}; i++ )); do
        opt_name="${1:$i:1}";
        case "$opt_name" in
          'h' )
            usage_exit
            ;;
          'a' )
            OPT_A=1
            ;;
          't' )
            OPT_TAGS+=("$2")
            shift
            ;;
        esac
      done
      ;;
    * )
      (( ++argc ))
      argv+=("$1")
      ;;
  esac
  shift
done