bash-script-template

Development

Generate bash script templates with best practices including error handling, argument parsing, logging, and portability considerations.

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Source SKILL.md: https://github.com/a5c-ai/babysitter/blob/HEAD/library/specializations/cli-mcp-development/skills/bash-script-template/SKILL.md

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Bash Script Template

Generate bash script templates with best practices.

Capabilities

Generate robust bash script templates
Set up proper error handling
Implement argument parsing with getopts
Create logging utilities
Configure strict mode settings
Generate reusable function libraries

Usage

Invoke this skill when you need to:

Create new bash scripts with best practices
Set up proper error handling patterns
Implement argument parsing
Create portable shell scripts

Inputs

Parameter	Type	Required	Description
scriptName	string	Yes	Script name
description	string	Yes	Script description
arguments	array	No	Script arguments
functions	array	No	Functions to include

Generated Template

#!/usr/bin/env bash
#
# <scriptName> - <description>
#
# Usage: <scriptName> [options] <arguments>
#

set -euo pipefail
IFS=#x27;\n\t'

# Script directory
readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
readonly SCRIPT_NAME="$(basename "${BASH_SOURCE[0]}")"

# Colors (if terminal supports)
if [[ -t 1 ]]; then
    readonly RED='\033[0;31m'
    readonly GREEN='\033[0;32m'
    readonly YELLOW='\033[0;33m'
    readonly BLUE='\033[0;34m'
    readonly NC='\033[0m'
else
    readonly RED='' GREEN='' YELLOW='' BLUE='' NC=''
fi

# Logging functions
log_info() { echo -e "${BLUE}[INFO]${NC} $*"; }
log_success() { echo -e "${GREEN}[OK]${NC} $*"; }
log_warn() { echo -e "${YELLOW}[WARN]${NC} $*" >&2; }
log_error() { echo -e "${RED}[ERROR]${NC} $*" >&2; }
die() { log_error "$*"; exit 1; }

# Cleanup on exit
cleanup() {
    # Add cleanup tasks here
    :
}
trap cleanup EXIT

# Usage
usage() {
    cat <<EOF
Usage: ${SCRIPT_NAME} [options] <argument>

<description>

Options:
    -h, --help      Show this help message
    -v, --verbose   Enable verbose output
    -d, --dry-run   Show what would be done
    -f, --force     Force operation
    -o, --output    Output file path

Arguments:
    argument        Required argument description

Examples:
    ${SCRIPT_NAME} -v input.txt
    ${SCRIPT_NAME} --output result.txt input.txt
EOF
}

# Parse arguments
parse_args() {
    local OPTIND opt
    while getopts ":hvdfo:-:" opt; do
        case "${opt}" in
            h) usage; exit 0 ;;
            v) VERBOSE=true ;;
            d) DRY_RUN=true ;;
            f) FORCE=true ;;
            o) OUTPUT="${OPTARG}" ;;
            -)
                case "${OPTARG}" in
                    help) usage; exit 0 ;;
                    verbose) VERBOSE=true ;;
                    dry-run) DRY_RUN=true ;;
                    force) FORCE=true ;;
                    output=*) OUTPUT="${OPTARG#*=}" ;;
                    *) die "Unknown option: --${OPTARG}" ;;
                esac
                ;;
            :) die "Option -${OPTARG} requires an argument" ;;
            ?) die "Unknown option: -${OPTARG}" ;;
        esac
    done
    shift $((OPTIND - 1))

    # Required arguments
    if [[ $# -lt 1 ]]; then
        usage
        die "Missing required argument"
    fi

    ARGUMENT="$1"
}

# Defaults
VERBOSE=${VERBOSE:-false}
DRY_RUN=${DRY_RUN:-false}
FORCE=${FORCE:-false}
OUTPUT=${OUTPUT:-}

# Main function
main() {
    parse_args "$@"

    if [[ "${VERBOSE}" == true ]]; then
        log_info "Verbose mode enabled"
    fi

    if [[ "${DRY_RUN}" == true ]]; then
        log_warn "Dry run mode - no changes will be made"
    fi

    log_info "Processing: ${ARGUMENT}"

    # Main logic here

    log_success "Done!"
}

main "$@"

Target Processes

shell-script-development
cross-platform-cli-compatibility
cli-application-bootstrap