The Directory Differential hTool

DDH traverses input directories and their subdirectories. It also hashes files as needed and reports findings.

The H in "hTool" is silent. The H in its abbreviation, "DDH," is not.

This tool is called DDH for two very good reasons. * DDT is a dangerous pesticide * I mistyped when I created the project

Usage

DDH is usable both as a library and as a stand alone CLI tool and aims to be simple to use in both cases.

Library example

let (complete_files, read_errors): (Vec<Fileinfo>, Vec<(_, _)>) = ddh::deduplicate_dirs(search_dirs); let (shared_files, unique_files): (Vec<&Fileinfo>, Vec<&Fileinfo>) = complete_files.par_iter().partition(|&x| x.get_paths().len()>1); process_full_output(&shared_files, &unique_files, &complete_files, &read_errors, &arguments);

CLI Install

Install Rust
cargo install --git https://github.com/darakian/ddh ddh
The DDH binary will be installed into $CARGO_HOME/.bin/ddh, which usually is $HOME/.cargo/bin/ddh. This should be in your PATH already if you're using rustup.

CLI Features

DDH supports both a standard output for human comprehension and a parsable json output for custom tools such as ddh-move.

CLI Example

``` Directory Difference hTool Jon Moroney jmoroney@hawaii.edu Compare and contrast directories. Example invocation: ddh /home/jon/downloads /home/jon/documents -f duplicates Example pipe: ddh ~/Downloads/ -o no -v all -f json | someJsonParser.bin

USAGE: ddh [OPTIONS] ...

FLAGS: -h, --help Prints help information -V, --version Prints version information

OPTIONS: -b, --blocksize Sets the display blocksize to Bytes, Kilobytes, Megabytes or Gigabytes. Default is Kilobytes. [possible values: B, K, M, G] -f, --format Sets output format. [possible values: standard, json, off] -o, --output Sets file to save all output. Use 'no' for no file output. -v, --verbosity Sets verbosity for printed output. [possible values: quiet, duplicates, all]

ARGS: ... Directories to parse ```

How Does DDH Work?

DDH works by hashing files to determine their uniqueness and, as such, depends heavily on disk speeds for performance. The algorithmic choices in use are discussed here.

Crates.io link

ddh