ouch/README.md
2021-03-24 01:56:18 -03:00

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# ouch (_work in progress_)
`ouch` is the Obvious Unified Compression (and decompression) Helper.
| Supported formats | .tar | .zip | .tar.{.lz,.gz, .bz} | .zip.{.lz, .gz, .bz, .bz2} | .bz | .gz | .lz, .lzma |
|-------------------|------|------|------------------------------|------------------------------|-----|-----|------------|
| Decompression | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Compression | ✓ | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ |
## How does it work?
`ouch` infers commands from the extensions of its command-line options.
```
ouch 0.1.0
Vinícius R. Miguel
ouch is a unified compression & decompression utility
USAGE:
ouch [OPTIONS] --input <input>...
FLAGS:
-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
$ ouch -i file{1..5}.zip another_file.tar.gz yet_another_file.tar.bz
```
When no output file is supplied, `ouch` infers that it must decompress all of its input files. This will error if any of the input files are not decompressible.
#### Decompressing a bunch of files into a folder
```bash
$ ouch -i file{1..5}.tar.gz -o some-folder
# Decompresses file1.tar.gz, file2.tar.gz, file3.tar.gz, file4.tar.gz and file5.tar.gz to some-folder
# The folder `ouch` saves to will be created if it doesn't already exist
```
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 file.
#### Compressing files
```bash
$ ouch -i file{1..20} -o archive.tar
```
### Error scenarios
#### No clear decompression algorithm
```bash
$ ouch -i some-file -o some-folder
error: file 'some-file' is not decompressible.
```
`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.
## Installation
### Runtime dependencies
`ouch` depends on a few widespread libraries:
* libbz2
* liblzma
Both should be already installed in any mainstream Linux distribution.
If they're not, then:
* On Debian-based distros
`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:
```bash
git clone https://github.com/vrmiguel/jacarex # Clone the repo.
cargo install --path ouch # .. and install it
```