fylex 0.8.1

A fast, intelligent file copier/mover with hashing, filters, conflict resolution, and backup support — built for power users.

Fylex: Your Intelligent File & Directory Orchestrator

Fylex is a fast, reliable, and intelligent file management tool written in Python. It goes beyond cp, mv, or rsync by offering smart conflict resolution, data integrity verification, undo support, and detailed logging — all in one package.

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📊 Comparison with Other Tools

Feature / Tool	cp / mv (Unix)	rsync (Unix)	Robocopy (Windows)	Fylex
Conflict resolution	❌ Overwrites only	⚠️ Basic (--ignore-existing, --update)	⚠️ Some options	✅ Multiple modes (rename, skip, replace, newer, larger, etc.)
Atomic operations	❌	❌	❌	✅ Safe temp + replace
Undo support	❌	❌	❌	✅ Rollback via process ID
Duplicate detection	❌	❌	❌	✅ By size/extension + hash
Hash verification	❌	✅ (with --checksum)	❌	✅ (xxhash, blake3, sha256, etc.)
Metadata preservation	✅ (basic: mtime)	✅ (mtime, perms, owner, xattrs)	✅ (NTFS ACLs)	✅ (mtime, ownership, xattrs, ACLs)
Logging	❌	✅ (basic logs)	✅ (detailed logs)	✅ Detailed JSON/JSONL + summaries
Dry run mode	❌	✅	✅	✅
Performance	✅ Very fast	✅ Optimized for sync	✅ Multi-threaded	✅ Optimized with adaptive buffer + fast hash

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Table of Contents

1. Introduction

2. Key Features

3. Installation

4. Usage

   • Core Functions
   • Common Parameters
   • Conflict Resolution Modes
   • Examples

5. Comparison with Other Tools

6. Error Handling & Robustness

7. Logging

8. Development & Contributing

9. License

10. Author

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Introduction

Managing files is often more complex than it looks. Simple copy/move commands can quickly become dangerous when conflicts, duplicates, or errors occur.

Fylex provides a safe, intelligent alternative with:

• atomic operations,
• duplicate detection,
• metadata preservation,
• flexible conflict handling, and
• undo functionality for peace of mind.

It’s designed for developers, sysadmins, and power users who demand speed, safety, and reliability.

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Key Features

• ⚡ Atomic File Operations Files are written to a temporary path and only moved into place after a successful transfer.

• 🧠 Smart Conflict Resolution Choose from strategies like rename, skip, replace, larger, newer, etc.

• 🧬 Duplicate Detection Detect duplicates by size/extension, then confirm with fast hashing (xxhash, blake3, md5, sha256, sha512).

• 🔒 Data Integrity Verification Optional --verify mode ensures source and destination files are bit-for-bit identical.

• 📂 Metadata Preservation Preserves timestamps, ownership, extended attributes, and ACLs when supported.

• ↩️ Undo Support Every operation is logged to JSON. You can roll back with a simple undo(process_id).

• 📊 Rich Logging JSONL and human-readable logs capture every operation for audit and rollback.

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Installation

Requirements

• Python 3.8+

• Optional hash libraries:

  pip install blake3 xxhash
  

• Linux users: attr and acl packages for xattr/ACL preservation.

Install via pip

pip install fylex

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Usage

You can use Fylex as a Python library or via its CLI (fylex copy, fylex move, fylex undo).

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Core Functions

filecopy

fylex.filecopy(src, dest, resolve="rename", verify=False, dry_run=False, ...)

Copies files/directories with intelligent conflict handling.

• src: Source file or directory
• dest: Destination directory
• resolve: Conflict mode (see below)
• verify: Verify integrity via hash comparison
• dry_run: Simulate without making changes

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filemove

fylex.filemove(src, dest, resolve="rename", verify=False, dry_run=False, ...)

Moves files safely with rollback protection.

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undo

fylex.undo(p_id, force=False)

Reverts a previous operation using its process ID.

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Common Parameters

• resolve: How to handle conflicts (rename, skip, replace, etc.)
• algo: Hashing algorithm (xxhash, blake3, md5, sha256, sha512)
• recurse: Traverse subdirectories
• summary: Write a copy of fylex.log to a summary file
• verbose: Stream logs to console

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Conflict Resolution Modes

• larger: Keep the larger file
• smaller: Keep the smaller file
• newer: Keep the newer file
• older: Keep the older file
• rename: Rename with suffix (file (1).txt)
• skip: Skip operation
• replace: Replace destination file
• prompt: Ask user

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Examples

from pathlib import Path
import fylex

src = Path("docs")
dest = Path("backup")

# Copy files with renaming and verification
fylex.filecopy(src, dest, resolve="rename", verify=True, recurse=True, verbose=True)

# Move only text files, keep newer versions
fylex.filemove(src, dest, match_names="notes.txt", resolve="newer", verify=True)

# Undo an operation
fylex.undo("1001")

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Comparison with Other Tools

• cp / mv: Fast but no safety, conflict handling, or undo.
• rsync: Great for remote sync, but Fylex is better for local integrity + undo.
• Robocopy: Windows-only, no cross-platform undo.

Fylex advantage: atomic safety, undo, hash verification, cross-platform support.

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Error Handling & Robustness

• Automatic retries (up to 5) on hash mismatches
• Logging of every failure, warning, or skipped file
• Safeguards prevent source/destination mix-ups

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Logging

• Logs to fylex.log + per-process JSONL/JSON
• Includes operations, hashes, timestamps, dry-run info
• verbose=True: streams logs to console
• summary="logfile.log": export a clean copy of log

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Development & Contributing

1. Fork the repo
2. Create a branch (feature/my-feature)
3. Commit with clear messages
4. Submit PR

Contributions welcome — from bug fixes to feature requests!

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License

Released under MIT License. xxHash is under BSD License.

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Author

Sivaprasad Murali 📧 [e-mail]

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✨ With Fylex, file management becomes safe, reversible, and intelligent.

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