duplicate_file_finder 0.1.2

Finds duplicate files.
Documentation

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Duplicate File Finder

A simple yet efficient program written in Rust to detect and report duplicate files within a specified directory and its subdirectories. The program leverages hashing techniques to ensure accuracy while minimizing runtime overhead. It uses a terminal progress indicator and logs key events, making it both user-friendly and reliable.

Features

  • Recursively checks directories for duplicate files.
  • Efficient hashing using quick hash (XXHash) and full hash (SHA-256) for accurate file comparison.
  • Progress bars for scanning and hashing files (using indicatif).
  • Logs events to a log file with fern, formatted in YYYYMMDD for the date.
  • Generates a report of duplicate files, ordered by file size, in a human-readable format (KB, MB, GB, TB).

Requirements

  • Rust 1.60+ (or use cargo for managing dependencies)
  • Dependencies: sha2, twox-hash, walkdir, indicatif, fern, log, chrono

Usage

To use the Duplicate Finder, run the following command:

cargo run -- <path_to_directory>

Example:

cargo run -- /home/user/documents

This command will start scanning the specified directory (/home/user/documents in this case) for duplicate files. It will recursively scan all subdirectories, compare files based on their hashes, and output a report of duplicates into a file named duplicates.txt. The report will list duplicate files grouped by size and include full file paths.

Additionally, the program will log all actions to duplicate_finder.log, using the YYYYMMDD format for the timestamp.

Log File

The log file, duplicate_finder.log, will contain detailed information about the program's execution. For example:

[20250125 14:32:12] [INFO] Starting duplicate file detection in /home/user/Documents
[20250125 14:32:12] [INFO] Scanning 1500 files in /home/user/Documents
[20250125 14:35:18] [INFO] Duplicate detection completed.
[20250125 14:35:19] [INFO] Duplicate files saved to duplicates.txt

Output

The output file duplicates.txt will contain a list of duplicate files, ordered by size (from largest to smallest). Each entry will include the file size and the full file paths of the duplicates.

Example:

Size: 1.45 GB
/home/user/documents/file1.txt
/home/user/documents/subdir/file1.txt

Size: 500.23 MB
/home/user/documents/file2.txt
/home/user/documents/subdir/file2.txt

Logging

The logger is set up using the fern crate and logs important events such as:

  • When scanning starts and finishes.
  • When duplicate detection is completed.
  • When duplicate files are saved to the output file.

Logs are written to duplicate_finder.log and are formatted with the YYYYMMDD date format.

Performance Considerations

This program is optimized for speed by:

  • First performing a quick hash (XXHash) on the beginning of each file, reducing unnecessary full hashing of identical files.
  • Using SHA-256 for final verification only when necessary, ensuring accurate comparisons.

Contributing

Feel free to fork the repository, submit issues, or create pull requests. We welcome contributions to improve performance or add new features!

License

This project is licensed under the MIT License - see the LICENSE file for details.