シェルスクリプトで Usage 表示

2023-10-05 · oppara

目次

はじめに
実装
実行

はじめに

簡易敵な Usage 表示

実装

#!/usr/bin/env bash
#/ Usage:
#/     awsome-script [-h | -help] <name> [<count>]
#/
#/ Example
#/     awsome-script foo
#/     awsome-script foo 3
#/

set -e

usage () {
  grep '^#/' < "$0" | cut -c4-
  exit 0
}

if [ "$1" = "--help" ] || [ "$1" = "-h" ]; then
  usage
fi

NAME=$1
COUNT=${2:-0}

echo "$NAME" "$COUNT"

実行

% /path/to/awsome-script -h 
Usage:
    awsome-script [-h | -help] <name> [<count>]

Example
    awsome-script foo
    awsome-script foo 3

% /path/to/awsome-script foo
foo 0