100 lines
1.7 KiB
Bash
100 lines
1.7 KiB
Bash
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#!/usr/bin/env bash
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set -Eeuo pipefail
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cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1
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trap cleanup SIGINT SIGTERM ERR EXIT
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usage() {
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cat <<EOF
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Usage: $(basename "$0") [-h] [-v] [-f] -p param_value arg1 [arg2...]
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Script description here.
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Available options:
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-h, --help Print this help and exit
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-v, --verbose Print script debug info
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-f, --flag Some flag description
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-p, --param Some param description
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EOF
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exit
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}
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cleanup() {
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trap - SIGINT SIGTERM ERR EXIT
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# script cleanup here
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}
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setup_colors() {
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if [[ -t 2 ]] && [[ -z "${NO_COLOR-}" ]] && [[ "${TERM-}" != "dumb" ]]; then
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NOCOLOR='\033[0m' RED='\033[0;31m' GREEN='\033[0;32m' ORANGE='\033[0;33m' BLUE='\033[0;34m' PURPLE='\033[0;35m' CYAN='\033[0;36m' YELLOW='\033[1;33m'
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else
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NOCOLOR='' RED='' GREEN='' ORANGE='' BLUE='' PURPLE='' CYAN='' YELLOW=''
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fi
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}
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msg() {
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echo >&2 -e "${1-}"
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}
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die() {
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local msg=$1
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local code=${2-1} # default exit status 1
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msg "$msg"
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exit "$code"
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}
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parse_params() {
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# default values of variables set from params
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flag=0
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param=''
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while :; do
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case "${1-}" in
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-h | --help)
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usage
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;;
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-v | --verbose)
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set -x
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;;
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--no-color)
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NO_COLOR=1
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;;
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-f | --flag) # example flag
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flag=1
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;;
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-p | --param) # example named parameter
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param="${2-}"
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shift
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;;
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-?*)
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die "Unknown option: $1"
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;;
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*)
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break
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;;
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esac
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shift
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done
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args=("$@")
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# check required params and arguments
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[[ -z "${param-}" ]] && die "Missing required parameter: param"
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[[ ${#args[@]} -eq 0 ]] && die "Missing script arguments"
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return 0
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}
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parse_params "$@"
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setup_colors
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# script logic here
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msg "${RED}Read parameters:${NOCOLOR}"
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msg "- flag: ${flag}"
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msg "- param: ${param}"
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msg "- arguments: ${args[*]-}"
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