# Ouch!
`ouch` stands for **Obvious Unified Compression Helper**.
It's a CLI tool for compressing and decompressing for various formats.
- [Features](#features)
- [Usage](#usage)
- [Installation](#installation)
- [Supported Formats](#supported-formats)
- [Benchmarks](#benchmarks)
- [Contributing](#contributing)
# Features
1. Easy to use.
2. Fast.
3. Great error message feedback.
4. No runtime dependencies required (for _Linux x86_64_).
5. Accessibility mode ([see more](https://github.com/ouch-org/ouch/wiki/Accessibility)).
6. Shell completions and man pages.
# Usage
Ouch has three main subcommands:
- `ouch decompress` (alias `d`)
- `ouch compress` (alias `c`)
- `ouch list` (alias `l` or `ls`)
To see `help` for a specific command:
```sh
ouch help
ouch --help # equivalent
```
## Decompressing
Use the `decompress` subcommand, `ouch` will detect the extensions automatically.
```sh
ouch decompress a.zip
# Decompress multiple files
ouch decompress a.zip b.tar.gz c.tar
```
The `-d/--dir` flag can be used to redirect decompression results to another directory.
```sh
# Decompress 'summer_vacation.zip' inside of new folder 'pictures'
ouch decompress summer_vacation.zip --dir pictures
```
## Compressing
Pass input files to the `compress` subcommand, add the **output file** at the end.
```sh
# Compress two files into `archive.zip`
ouch compress one.txt two.txt archive.zip
# Compress file.txt using .lz4 and .zst
ouch compress file.txt file.txt.lz4.zst
```
`ouch` detects the extensions of the **output file** to decide what formats to use.
## Listing
```sh
ouch list archive.zip
# Example with tree formatting
ouch list source-code.zip --tree
```
Output:
```
└── src
├── archive
│ ├── mod.rs
│ ├── tar.rs
│ └── zip.rs
├── utils
│ ├── colors.rs
│ ├── formatting.rs
│ ├── mod.rs
│ └── fs.rs
├── commands
│ ├── list.rs
│ ├── compress.rs
│ ├── decompress.rs
│ └── mod.rs
├── accessible.rs
├── error.rs
├── cli.rs
└── main.rs
```
# Supported formats
| Format | `.tar` | `.zip` | `7z` | `.gz` | `.xz`, `.lzma` | `.bz`, `.bz2` | `.lz4` | `.sz` (Snappy) | `.zst` | `.rar` |
|:---------:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
| Supported | ✓ | ✓¹ | ✓¹ | ✓² | ✓ | ✓ | ✓ | ✓² | ✓ | ✓³ |
✓: Supports compression and decompression.
✓¹: Due to limitations of the compression format itself, (de)compression can't be done with streaming.
✓²: Supported, and compression runs in parallel.
✓³: Due to Rar's restrictive license, only decompression and listing can be supported.
`tar` aliases are also supported: `tgz`, `tbz`, `tbz2`, `tlz4`, `txz`, `tlzma`, `tsz`, `tzst`.
Formats can be chained:
- `.tar.gz`
- `.tar.gz.xz.zst.gz.lz4.sz`
If the filename has no extensions, `Ouch` will try to infer the format by the [file signature](https://en.wikipedia.org/wiki/List_of_file_signatures) and ask the user for confirmation.
# Installation
## On Arch Linux
```bash
pacman -S ouch
```
## On Windows via Scoop
```cmd
scoop install ouch
```
## From crates.io
```bash
cargo install ouch
```
## Download the latest release bundle
Check the [releases page](https://github.com/ouch-org/ouch/releases).
## Compiling from source code
Check the [wiki guide on compiling](https://github.com/ouch-org/ouch/wiki/Compiling-and-installing-from-source-code).
# Dependencies
If you installed `ouch` using the download script, you will need no dependencies (static MUSL binary).
Otherwise, you'll need these libraries installed on your system:
* [liblzma](https://www.7-zip.org/sdk.html)
* [libbz2](https://www.sourceware.org/bzip2/)
* [libz](https://www.zlib.net/)
These are available on all mainstream _Linux_ distributions and on _macOS_.
# Benchmarks
Benchmark results are available [here](benchmarks/results.md).
Performance of compressing and decompressing
[Rust](https://github.com/rust-lang/rust) source code are measured and compared with
[Hyperfine](https://github.com/sharkdp/hyperfine).
The values presented are the average (wall clock) elapsed time.
Note: `ouch` focuses heavily on usage ergonomics and nice error messages, but
we plan on doing some optimization in the future.
Versions used:
- `ouch` _0.4.0_
- [`tar`] _1.34_
- [`unzip`][infozip] _6.00_
- [`zip`][infozip] _3.0_
# Contributing
`ouch` is made out of voluntary work, contributors are very welcome! No contribution is too small and all contributions are valued.
- Open an [issue](https://github.com/ouch-org/ouch/issues).
- Package it for your favorite distribution or package manager.
- Open a pull request.
- Share it with a friend!
[`tar`]: https://www.gnu.org/software/tar/
[infozip]: http://www.info-zip.org/