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README.md: Document the purpose of this fork
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rhansen authored Dec 7, 2024
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[![Kofi](https://badgen.net/badge/icon/kofi?icon=kofi&label)](https://ko-fi.com/rvaiya)

# Impetus

[![Packaging status](https://repology.org/badge/tiny-repos/keyd.svg)](https://repology.org/project/keyd/versions)

# keyd (temporary friendly fork)

A key remapping daemon for Linux.

> [!NOTE]
> https://github.com/keyd-project/keyd-fork is a temporary, friendly fork of the
> [original keyd project](https://github.com/rvaiya/keyd). This fork was
> created on 2024-12-06 with the following goals:
>
> * Help reduce the backlog of pull requests in the original project by
> merging them here and creating releases that users can test.
> * Provide a well-maintained distribution tarball to make it easier for
> downstream packagers to maintain keyd packages.
> * Recruit potential maintainers. (If you are interested, please contact
> [@rhansen](https://github.com/rhansen).)
>
> Once the original project acquires a vibrant group of maintainers, this fork
> will be archived. If the original project is abandoned, this fork will be
> made permanent by dropping the `-fork` suffix.
>
> Feel free to open issues or merge requests in this fork.
## Impetus

Linux lacks a good key remapping solution. In order to achieve satisfactory
results a medley of tools need to be employed (e.g xcape, xmodmap) with the end
result often being tethered to a specified environment (X11). keyd attempts to
solve this problem by providing a flexible system wide daemon which remaps keys
using kernel level input primitives (evdev, uinput).

# Note on v2
## Note on v2

The config format has undergone several iterations since the first
release. For those migrating their configs from v1 it is best
to reread the man page.

See also: [changelog](docs/CHANGELOG.md).

# Goals
## Goals

- Speed (a hand tuned input loop written in C that takes <<1ms)
- Simplicity (a [config format](#sample-config) that is intuitive)
- Consistency (modifiers that [play nicely with layers](https://github.com/rvaiya/keyd/blob/6dc2d5c4ea76802fd192b143bdd53b1787fd6deb/docs/keyd.scdoc#L128) by default)
- Modularity (a UNIXy core extensible through the use of an [IPC](https://github.com/rvaiya/keyd/blob/90973686723522c2e44d8e90bb3508a6da625a20/docs/keyd.scdoc#L391) mechanism)

# Features
## Features

keyd has several unique features many of which are traditionally only
found in custom keyboard firmware like [QMK](https://github.com/qmk/qmk_firmware)
Expand Down Expand Up @@ -57,30 +78,30 @@ Some of the more interesting ones include:

- A tool for programming individual key up/down events.

# Dependencies
## Dependencies

- Your favourite C compiler
- Linux kernel headers (already present on most systems)

## Optional
### Optional

- python (for application specific remapping)
- python-xlib (only for X support)
- dbus-python (only for KDE support)

# Installation
## Installation

*Note:* master serves as the development branch, things may occasionally break
between releases. Releases are [tagged](https://github.com/rvaiya/keyd/tags), and should be considered stable.

## From Source
### From Source

git clone https://github.com/rvaiya/keyd
cd keyd
make && sudo make install
sudo systemctl enable keyd && sudo systemctl start keyd

# Quickstart
## Quickstart

1. Install and start keyd (e.g `sudo systemctl enable keyd`)

Expand Down Expand Up @@ -119,7 +140,7 @@ Some mice (e.g the Logitech MX Master) are capable of emitting keys and
are consequently matched by the wildcard id. It may be necessary to
explicitly blacklist these.

## Application Specific Remapping (experimental)
### Application Specific Remapping (experimental)

- Add yourself to the keyd group:

Expand Down Expand Up @@ -148,7 +169,7 @@ display server initialization logic (e.g ~/.xinitrc) unless you are running Gnom

See the man page for more details.

## SBC support
### SBC support

Experimental support for single board computers (SBCs) via usb-gadget
has been added courtesy of Giorgi Chavchanidze.
Expand Down Expand Up @@ -201,7 +222,7 @@ archive](https://launchpad.net/~keyd-team/+archive/ubuntu/ppa).
If you wish to help maintain this PPA, please contact
[@rhansen](https://github.com/rhansen).

# Sample Config
## Sample Config

[ids]

Expand All @@ -218,7 +239,7 @@ If you wish to help maintain this PPA, please contact
f = /
...

# Recommended config
## Recommended config

Many users will probably not be interested in taking full advantage of keyd.
For those who seek simple quality of life improvements I can recommend the
Expand All @@ -245,17 +266,17 @@ control (when held) and remaps all modifiers to 'oneshot' keys. Thus to produce
the letter A you can now simply tap shift and then a instead of having to hold
it. Finally it remaps insert to S-insert (paste on X11).

# FAQS
## FAQS

## What about xmodmap/setxkbmap/*?
### What about xmodmap/setxkbmap/*?

xmodmap and friends are display server level tools with limited functionality.
keyd is a system level solution which implements advanced features like
layering and [oneshot](https://docs.qmk.fm/#/one_shot_keys)
modifiers. While some X tools offer similar functionality I am not aware of
anything that is as flexible as keyd.

## What about [kmonad](https://github.com/kmonad/kmonad)?
### What about [kmonad](https://github.com/kmonad/kmonad)?

keyd was written several years ago to allow me to easily experiment with
different layouts on my growing keyboard collection. At the time kmonad did not
Expand All @@ -271,15 +292,15 @@ in Haskell). Having said that, it supplies (in the author's opinion) the
most valuable features in less than 2000 lines of C while providing
a simple language agnostic config format.

## Why doesn't keyd implement feature X?
### Why doesn't keyd implement feature X?

If you feel something is missing or find a bug you are welcome to file an issue
on github. keyd has a minimalist (but sane) design philosophy which
intentionally omits certain features (e.g execing arbitrary executables
as root). Things which already exist in custom keyboard firmware like QMK are
good candidates for inclusion.

# Contributing
## Contributing

See [CONTRIBUTING](CONTRIBUTING.md).
IRC Channel: #keyd on oftc

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