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s4k-admin-toolbox/tools/linux/compare-dirs/README.md
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syr4ok efeef3d4b1 feat(utils): add compare-dirs.sh utility
- recursive directory comparison based on source folder
- support for quiet mode and custom log files
- colored output and dependency checking
- integrated with main navigation table
2026-04-14 14:28:43 +03:00

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# 🛠 Directory Comparator
A robust Bash utility for recursive file comparison between two directories. It uses DIR_A as the source of truth for file names and checks for their existence and differences in DIR_B. Perfect for auditing configuration changes or verifying backup integrity.
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### ⚙️ Prerequisites
* **diff:** Used for generating file differences.
* **find:** Required for recursive file discovery.
* **Bash 4+:** Utilizes modern bash features like `set -euo pipefail`.
### 📊 Parameters Mapping
| Option | Description |
| :--- | :--- |
| -o <file> | Save the full report to a specific file (default: `./compare-dirs.log`). |
| -q | Quiet mode: Show only the final summary without full `diff` output. |
| -h | Show help and usage information. |
### 🏃 Quick Start
```bash
# Basic comparison (outputs diffs to terminal and compare-dirs.log)
./compare-dirs.sh /path/to/dir_a /path/to/dir_b
# Quiet mode (summary only) with custom log file
./compare-dirs.sh -q -o audit_report.log /etc/nginx /backup/nginx
```
### 🛡 Features
* **Safe Discovery:** Uses `-printf '%P\0'` with `find` to safely handle filenames with spaces or special characters.
* **Strict Execution:** Built-in error trapping and strict mode to prevent silent failures.
* **Colorized UI:** Visual feedback for **IDENTICAL**, **DIFFERENT**, and **MISSING** status.
* **Log Rotation Ready:** Outputs to both `STDOUT` and log files simultaneously.
---
### ⚖️ License
MIT [LICENSE](https://github.com/andsyrovatko/s4k-admin-toolbox/blob/main/LICENSE). Free to use and modify.