How does this skill handle macOS and Linux command differences?

It provides portable patterns and detection logic for tools like sed, date, and readlink, which have different flags and behaviors depending on whether they are GNU (Linux) or BSD (macOS) versions.

Is it better to use #!/bin/sh or #!/bin/bash for portable scripts?

Use #!/bin/sh for maximum portability if you only need standard features. Use #!/usr/bin/env bash for scripts requiring modern Bash features to ensure the bash binary is found correctly across different systems.

What is the difference between Bash and POSIX shell?

Bash includes extended features like arrays, regex matching, and double-bracket tests, while POSIX (sh) is a minimal standard designed for maximum compatibility across all Unix-like systems.

Can this skill help with ShellCheck integration?

Yes, it includes best practices for using ShellCheck directives to manage portability warnings (like SC2039) and ensure scripts adhere to specific shell standards.

Shell Script Portability & POSIX Compliance

Name: Shell Script Portability & POSIX Compliance
Author: TheBushidoCollective

byTheBushidoCollective

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開発者ツール

Ensures shell scripts run reliably across diverse environments, including Linux, macOS, and POSIX-compliant systems.

This skill provides specialized guidance for writing robust, cross-platform shell scripts by identifying critical differences between Bash-specific features and POSIX standards. It helps developers navigate the nuances of system-specific tools like sed, date, and readlink, while offering patterns for environment detection and ShellCheck compatibility. By abstracting platform differences into portable functions, this skill ensures that your automation scripts function consistently across Linux, macOS, and BSD environments without runtime failures.

主な機能

01ShellCheck integration for linting and portability warnings

0295 GitHub stars

03POSIX vs. Bash syntax validation and conversion

04Portable shell patterns for file handling and string operations

05Cross-platform command abstraction for macOS and Linux

06Automated environment, OS, and architecture detection

ユースケース

01Refactoring legacy Bash scripts into POSIX-compliant sh for embedded systems

02Writing system administration scripts for heterogeneous server environments

03Developing CI/CD scripts that must run on both Linux runners and macOS local machines

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add thebushidocollective/han shell-portability

For use in Claude.ai and ChatGPT

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