fif/README.md

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fif
===
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[![Version](https://img.shields.io/crates/v/fif.svg?style=flat-square)](https://crates.io/crates/fif)
[![License](https://img.shields.io/crates/l/fif.svg?style=flat-square)](https://git.bune.city/lynnesbian/fif/src/branch/master/LICENSE)
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![Minimum Supported Rust Version](https://img.shields.io/badge/msrv-1.43.0-orange?style=flat-square)
[![CI Status](https://drone.bune.city/api/badges/lynnesbian/fif/status.svg?style=flat-square)](https://drone.bune.city/lynnesbian/fif)
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[![unsafe forbidden](https://img.shields.io/badge/unsafe-forbidden-success.svg)](https://github.com/rust-secure-code/safety-dance/)
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A command-line tool for detecting and optionally correcting files with incorrect extensions.
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fif recursively scans the given directory and outputs a shell script to fix the name of any files with incorrect
extensions. By default, fif will scan all non-hidden files in the given directory, and will ignore symlinks.
As fif prints a shell script to stdout rather than acting on the files directly, you may wish to redirect its output to
a file, e.g. `fif ~/Documents > output.sh`. You can also pipe the output directly into your shell, e.g.
`fif ~/Documents | bash`, although this is not recommended - you should look over fif's output and verify for yourself
that it's not doing anything that will give you a headache before running it.
## Installation
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### Cargo
```bash
cargo install --locked fif
```
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To update, simply re-run this command, or use a tool like
[cargo-update](https://github.com/nabijaczleweli/cargo-update).
#### Other backends
`fif` supports using [`infer`](https://crates.io/crates/infer) or [`xdg-mime`](https://crates.io/crates/xdg-mime) as its
backend for looking up file types. By default, xdg-mime will be used on
[*nix systems](https://en.wikipedia.org/wiki/Unix-like) (Linux, macOS, *BSD, etc.), and infer on all other systems.
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`xdg-mime` should work on any *nix system with [libmagic/file(1)](https://www.darwinsys.com/file/) installed, although
I've only tested it on Linux and FreeBSD. `infer` should work on any system.
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You can override the default backend for your system at compile time like so:
```bash
# xdg-mime
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cargo install fif --features=xdg-mime-backend
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# infer
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cargo install fif --features=infer-backend
```
Of the supported backends, `xdg-mime` by far supports the most file types, as it uses the excellent [Shared MIME
Info](https://gitlab.freedesktop.org/xdg/shared-mime-info/) database, whereas `infer` uses its own baked-in database.
However, `infer` is also faster to load, if only by a few dozen milliseconds, and has no external dependencies.
#### Multithreading
It is also possible to disable multithreading by installing without default features:
```bash
cargo install fif --no-default-features
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```
## Usage
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See `fif --help` for more.
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### Logging
By default, fif will log any warnings and/or errors encountered during execution. The verbosity of the logging can be
modified by the `RUST_LOG` to one of: `trace`, `debug`, `info`, `warn`, `error`.
For example:
```bash
RUST_LOG=debug fif ~/Downloads
```
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### The basics
The simplest way to use fif looks like this:
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```bash
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fif ~/Downloads
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```
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This command will scan all non-hidden files in your `~/Downloads` directory.
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You can also manually specify a set of extensions to use:
```bash
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fif -e jpeg,jpg,zip,docx ~/Documents
```
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Or a set of extensions - for example, to scan files with image extensions (jpg, png, gif, bmp...):
```bash
fif -E images ~/Pictures
```
For more information, see [the man page](https://git.bune.city/lynnesbian/fif/src/branch/master/doc/fif.1.txt)
### Output
By default, fif will output a bash script (or PowerShell script on Windows) that can be used to fix all the files it
found with incorrect file extensions.
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You might find it useful to output this script to a file (rather than to stdout):
```bash
fif -E images ~/Pictures > output.sh
```
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You can also manually specify an output format to use:
```bash
fif -O powershell ~/Documents > output.ps1
```