92 lines
2.1 KiB
Bash
92 lines
2.1 KiB
Bash
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#!/usr/bin/env bash
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# ERR Trap Inheritance by shell functions, command substitutions, and subshells.
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set -E
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# Exit on Error Causes the script to immediately exit if any command returns a non-zero exit status unless that command is followed by || to explicitly handle the error.
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set -e
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# Treats the use of undefined variables as an error, causing the script to exit.
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set -u
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# Ensures that a pipeline (a series of commands connected by |) fails if any command within it fails, rather than only failing if the last command fails.
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set -o pipefail
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# Cleaup script.
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trap cleanup SIGINT SIGTERM ERR EXIT
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# Get the script location and cd to it.
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script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)
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# Usage error message.
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usage() {
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cat <<EOF
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Usage: $(basename "${BASH_SOURCE[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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EOF
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exit
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}
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# Cleaup up script iplementation.
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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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# Color setup implementation.
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setup_colors() {
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if [[ -t 2 ]] && [[ -z "${NO_COLOR-}" ]] && [[ "${TERM-}" != "dumb" ]]; then
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NOFORMAT='\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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NOFORMAT='' RED='' GREEN='' ORANGE='' BLUE='' PURPLE='' CYAN='' YELLOW=''
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fi
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}
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# Message helper function implementation.
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msg() {
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echo >&2 -e "${1-}"
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}
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# Script exit implementation.
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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 "\033[0;31m$msg\033[0m"
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exit "$code"
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}
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# Parameter parsing implementation.
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parse_params() {
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while :; do
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case "${1-}" in
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-h | --help) usage ;;
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-v | --verbose) set -x ;;
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--no-color) NO_COLOR=1 ;;
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-?*) die "Unknown option: $1" ;;
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*) break ;;
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esac
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shift
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done
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args=("$@")
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return 0
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}
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# ----- Script Start -----
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# Parse parameters and setup colors for script.
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parse_params "$@"
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setup_colors
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# Script logic example here.
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msg "${GREEN}Read parameters:${NOFORMAT}"
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exit 0
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