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# ouch (_work in progress_) # Ouch!
`ouch` is the Obvious Unified Compression (_and decompression_) Helper. ### This readme is a WIP draft, and does not represent the reality
See the old README at https://github.com/vrmiguel/ouch/tree/0f453e9dfc70066056b9cc40e8032dcc6ee703bc
<!-- ![ouch_image](https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcR5ilNDTFZZ-Vy_ctm2YyAe8Yk0UT7lB2hIhg&usqp=CAU) -->
`ouch` loosely stands for Obvious Unified Compression (ᵃⁿᵈ ᵈᵉᶜᵒᵐᵖʳᵉˢˢᶦᵒⁿ) Helper and aims to be an easy and intuitive way of compressing and decompressing files on the command-line.
- [Usage](#Usage)
- [Decompress](#Decompress)
- [Compress](#Compress)
- [Convert](#Convert)
- [Supported Formats](#Supported-formats)
- [Installation](#Installation)
- [Supported operating systems](#Supported-operating-systems)
| Supported formats | .tar | .zip | .tar.{.lz*,.gz, .bz} | .zip.{.lz*, .gz, .bz*} | .bz | .gz | .lz, .lzma | ## Usage
|-------------------|------|------|------------------------------|------------------------------|-----|-----|------------|
| Decompression | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Compression | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
## How does it work? `ouch` uses the file extensions to infer the file formats.
`ouch` infers commands from the extensions of its command-line options. For example, `ouch compress a b c.zip` tells to compress `a` and `b` into the same `c.zip` compressed file.
``` ### Decompressing files
ouch 0.1.4 <!-- botei caps e mais um #, acho que ficou bom para os comandos -->
Vinícius R. Miguel
ouch is a unified compression & decompression utility
USAGE: To decompress, just call `ouch` passing the input files.
ouch [OPTIONS] --input <input>...
FLAGS: Use the `-o, --output` flag to redirect the output to a folder.
-h, --help Displays this message and exits
-V, --version Prints version information
OPTIONS:
-i, --input <input>... The input files or directories.
-o, --output <output> The output directory or compressed file.
```
### Examples
#### Decompressing a bunch of files
```bash ```bash
$ ouch -i file{1..5}.zip another_file.tar.gz yet_another_file.tar.bz # Decompress `a.zip`
ouch a.zip
# Decompress multiple files
ouch a.zip b.tar.gz
# Decompress multiple files, but inside new_folder
ouch a.zip b.tar.gz -o new_folder
``` ```
When no output file is supplied, `ouch` infers that it must decompress all of its input files into the current folder. This will error if any of the input files are not decompressible. ### Compressing files and directories
#### Decompressing a bunch of files into a folder The `compress` subcommand accepts files and folders where the **last** one is the desired **output file**.
```bash ```bash
$ ouch -i file{1..3}.tar.gz videos.tar.bz2 -o some-folder # Compress four files into `archive.zip`
# Decompresses file1.tar.gz, file2.tar.gz, file3.tar.gz and videos.tar.bz2 to some-folder ouch compress a b c d archive.zip
# The folder `ouch` saves to will be created if it doesn't already exist
# Compress three files into `.tar.bz2` archive
ouch compress a.mp4 b.jpg c.png files.tar.bz2
# Compress a folder and a file into `videos.tar.xz`
ouch compress Videos/ funny_meme.mp4 videos.tar.xz
``` ```
When the output file is not a compressed file, `ouch` will check if all input files are decompressible and infer that it must decompress them into the output folder. ### Converting between compressed archives
#### Compressing files ```
# Will decompress a.tar.gz b.tar.bz and compress it into new-archive.tar.xz2
```bash ouch convert a.tar.gz b.tar.bz new-archive.tar.xz2
$ ouch -i file{1..20} -o archive.tar
$ ouch -i Videos/ Movies/ -o media.tar.lzma
$ ouch -i src/ Cargo.toml Cargo.lock -o my_project.tar.gz
``` ```
### Error scenarios ### Listing the elements of an archive
#### No clear decompression algorithm (TODO -- not implemented at all)
```bash ```
$ ouch -i some-file -o some-folder # Shows the files contained in videos.tar.xz
error: file 'some-file' is not decompressible. ouch list videos.tar.xz
1. .....
``` ```
`ouch` cannot infer `some-file`'s compression format since it lacks an extension. Likewise, `ouch` cannot infer that the output file given is a compressed file, so it shows the user an error. ## Supported formats
```bash
$ ouch -i file other-file -o files.gz | | .tar | .zip | .tar.\*¹ | .zip.\*² | .bz, .bz2 | .gz | .xz, .lz, .lzma | .7z |
error: cannot compress multiple files directly to Gzip. |:-------------:|:----:|:----:|:--------:|:--------:|:---------:| --- |:---------------:| --- |
Try using an intermediate archival method such as Tar. | Decompression | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✗ |
Example: filename.tar.gz | Compression | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✗ |
```
Note: .tar.*¹: .tar.gz, .tar.bz, .tar.bz2, .tar.xz, .tar.lz, .tar.lzma, .tar.zip
.zip.*²: .zip.gz, .zip.bz, .zip.bz2, .zip.xz, .zip.lz, .zip.lzma, .zip.zip
``` ```
Similar errors are shown if the same scenario is applied to `.lz/.lzma` and `.bz/.bz2`.
## Installation ## Installation
### Runtime dependencies ### Getting a pre-compiled binary
`ouch` depends on a few widespread libraries: ```bash
* libbz2 curl -s https://raw.githubusercontent.com/vrmiguel/ouch/master/install.sh | bash
* liblzma ```
Both should be already installed in any mainstream Linux distribution. ### Building
If they're not, then: A recent [Rust] toolchain is needed to build `ouch`. Go to [rustup.rs](https://rustup.rs/) to get it.
* On Debian-based distros Once [Cargo](https://doc.rust-lang.org/cargo/) is installed, run:
`sudo apt install liblzma-dev libbz2-dev`
* On Arch-based distros
`sudo pacman -S xz bzip2`
The last dependency is a recent [Rust](https://www.rust-lang.org/) toolchain. If you don't have one installed, follow the instructions at [rustup.rs](https://rustup.rs/).
### Build process
Once the dependency requirements are met:
* Installing from [Crates.io](https://crates.io)
```bash ```bash
cargo install ouch cargo install ouch
``` # or
* Cloning and building
```bash
git clone https://github.com/vrmiguel/ouch git clone https://github.com/vrmiguel/ouch
cargo install --path ouch cargo install --path ouch
# or
cd ouch && cargo run --release
``` ```
I also recommend stripping the release binary. `ouch`'s release binary (at the time of writing) only takes up a megabyte in space when stripped.
## Supported operating systems ## Supported operating systems
`ouch` _should_ be cross-platform but is currently only tested (and developed) on Linux, on both x64-64 and ARM.
## Limitations ## Limitations
`ouch` does encoding and decoding in-memory, so decompressing very large files with `ouch` is not advisable. `ouch` does encoding and decoding in-memory, so decompressing very large files with it is not advisable.
## Contributions
Any contributions and suggestions are welcome!