shell script template

shell_script_template.sh

#!/bin/bash
#
# description

# strict mode
set -euo pipefail
IFS=$'\n\t'

# variables
readonly COMMAND_NAME=$(basename ${0})
readonly VERSION=0.1.0

readonly RED="\e[31m"
readonly GREEN="\e[32m"
readonly COLOR_F="\e[m"

exit_code=0

# error出力
error() {
  logger -isp local0.error "$@"
}

# usage
usage() {
  cat <<EOF
${COMMAND_NAME} - xxx script

Usage: ${COMMAND_NAME} [-ab] -p foo [-s var] [FILE] ...

Options:
  -a    ....
  -b    ....
  -p    ....
  -s    ....

Examples:
  ${COMMAND_NAME} ...

EOF
}

# version
version() {
  cat <<EOF
${COMMAND_NAME} v${VERSION}
Copyright (C) 2016 Quants Research Inc.

EOF
}

# logging
logger -ip local0.info "${COMMAND_NAME} run by user ${USER}"

# switching options
while [[ $# -gt 0 ]]; do
  case "${1}" in
    --debug | -d )
      set -x
      ;;
    --help | -h )
      usage
      ;;
    --version | -v )
      version
      ;;
    -- )
      shift
      break
      ;;
    -* )
      error "invalid option "${1}""
      usage
      exit 1
      ;;
  esac

  shift
done

exit ${exit_code}