Zsh Lesson20 Error Handling

Learn error handling in Zsh! This lesson covers exit codes with $?, success (0) vs failure (non-zero), custom exit codes, if/||/&& checking, strict mode with set -e (errexit), set -u (nounset), set -o pipefail, the trap command for cleanup on EXIT, trap ERR, error functions, and signal handling. 🔗 Source code: https://github.com/GoCelesteAI/zsh_error_handling ⏱️ Timestamps: 0:00 — Intro 0:26 — Exit Codes Explained 1:06 — Exit Codes Demo 2:49 — Strict Mode Explained 3:29 — Strict Mode Demo 5:15 — Trap & Cleanup Explained 5:53 — Trap & Cleanup Demo 7:49 — Recap 8:31 — End 📋 Topics covered: • Exit codes: $? checks success/failure • Success (0) vs failure (non-zero) • Custom exit codes with exit N • Checking status with if, ||, && • set -e (errexit): exit on first error • set -u (nounset): error on undefined variables • set -o pipefail: pipe fails if any part fails • Combined: set -euo pipefail — the gold standard • trap command: trap 'code' SIGNAL • Cleanup on EXIT: trap cleanup EXIT • Trap on ERR: catch errors with line numbers • Error functions for reusable error handling • Common signals: EXIT, ERR, INT, TERM • Full pattern: strict mode + trap for production scripts 🎬 Part of the Zsh Shell Tutorial series — subscribe for weekly lessons!