shell-scripting

What This Skill Does

The shell-scripting skill empowers OpenClaw to write robust, maintainable, and portable POSIX-compliant Bash scripts. It serves as a structured blueprint for developers and automation engineers to generate high-quality code. By enforcing best practices like set -euo pipefail, the skill ensures that scripts fail fast, handle undefined variables, and propagate exit codes through pipes. It includes standardized templates for argument parsing using case blocks, temporary file management via mktemp and trap for automated cleanup, and logging mechanisms for debugging. This skill bridges the gap between quick-and-dirty one-liners and production-ready automation tools that are safe for team environments.

Installation

You can install this skill by running the following command in your terminal: clawhub install openclaw/skills/skills/gitgoodordietrying/shell-scripting

Use Cases

• DevOps Automation: Creating infrastructure setup scripts or environment preparation routines that work consistently on both macOS and Linux environments.
• Data Pipelines: Writing wrapper scripts to process files, clean data, and move results to appropriate storage, with built-in error reporting.
• CLI Tooling: Extending terminal functionality by building custom command-line utilities that handle flags (e.g., --help, --output) and exit codes gracefully.
• Process Orchestration: Managing concurrent tasks using background processes and wait mechanisms to speed up local workflows.

Example Prompts

1. "Use the shell-scripting skill to create a template script that takes a directory path as an argument, validates that it exists, and converts all .jpg images within it to .png using ImageMagick, while cleaning up any temp files on exit."
2. "Write a bash script that iterates through a list of URLs from a text file, downloads them in parallel using xargs or background jobs, and logs the exit status of each download."
3. "Refactor this snippet to follow the OpenClaw shell-scripting standards: add proper argument parsing, ensure safe variable handling with set -eu, and implement a usage function for a --help flag."

Tips & Limitations

• Portability: While this skill focuses on Bash, always verify if your target environments have specific Bash versions, especially regarding modern shell features.
• Security: Always quote variables ($VAR) to prevent globbing and word splitting, a critical habit the templates in this skill reinforce.
• Complexity: This skill is best suited for medium-complexity automation. For extremely complex logic involving state management, consider recommending Python instead.
• Debugging: Leverage the debug() function included in the template to avoid cluttering your terminal, but use set -x only during deep troubleshooting sessions as it can leak sensitive data in logs.