What is an idempotent script in this context?

An idempotent script is designed so that running it multiple times has the same effect as running it once, such as checking if a directory exists before trying to create it.

Does this skill help with temporary file management?

Yes, it provides patterns for creating secure temporary directories with mktemp and ensures they are automatically deleted using EXIT traps, even if the script crashes.

Can I use these patterns for cross-platform scripts?

The skill includes both Bash-specific features for maximum safety and POSIX-compliant patterns for scripts that must run across different Unix-like systems.

What is Bash 'Strict Mode' and why is it used?

Bash Strict Mode is a combination of settings (set -Eeuo pipefail) that forces a script to exit immediately if any command fails, a variable is undefined, or a pipe error occurs, preventing silent failures.

How does this skill improve CI/CD pipeline reliability?

By enforcing error checking and trapping, it prevents pipelines from proceeding after a failure, which protects environments from partial or broken deployments.

Bash Defensive Patterns

Name: Bash Defensive Patterns
Author: drgaciw

bydrgaciw

デプロイメントとDevOps

Implements production-grade defensive programming techniques for robust, fault-tolerant Bash scripts and automation.

概要

Bash Defensive Patterns provides a comprehensive set of templates and best practices for writing high-quality shell scripts that are resilient to common failure modes. It guides users through the implementation of Bash 'Strict Mode,' robust error trapping, safe variable management, and atomic file operations, ensuring that CI/CD pipelines and system utilities remain reliable even in edge cases. This skill is essential for developers and DevOps engineers looking to transition from simple scripts to maintainable, production-ready automation that handles errors gracefully.

主な機能

Automatic 'Strict Mode' integration (set -Eeuo pipefail) to catch errors early
Idempotent script design to ensure safe repeated execution
0 GitHub stars
Advanced error trapping and automated resource cleanup mechanisms
Safe variable handling and atomic file operation patterns
Robust CLI argument parsing and structured logging templates

ユースケース

Developing system administration utilities for cross-platform environments
Building mission-critical CI/CD deployment pipelines and automation
Creating maintainable and shareable shell script libraries for engineering teams

概要

主な機能

Automatic 'Strict Mode' integration (set -Eeuo pipefail) to catch errors early
Idempotent script design to ensure safe repeated execution
0 GitHub stars
Advanced error trapping and automated resource cleanup mechanisms
Safe variable handling and atomic file operation patterns
Robust CLI argument parsing and structured logging templates

ユースケース

Developing system administration utilities for cross-platform environments
Building mission-critical CI/CD deployment pipelines and automation
Creating maintainable and shareable shell script libraries for engineering teams