Simple hotkey daemon for macOS
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README.md

Build Status

skhd is a simple hotkey daemon for macOS. It is a stripped version of khd (no longer maintained) (although rewritten from scratch), that sacrifices the more advanced features in favour of increased responsiveness and performance. skhd is able to hotload its config file, meaning that hotkeys can be edited and updated live while skhd is running.

feature comparison between skhd and khd

feature skhd khd
hotload config file [x] [ ]
hotkey passthrough [x] [x]
modal hotkey-system [x] [x]
use media-keys as hotkey [x] [ ]
application specific hotkey [x] [x]
modifier only hotkey [ ] [x]
caps-lock as hotkey [ ] [x]
mouse-buttons as hotkey [ ] [x]

Install

The first time skhd is ran, it will request access to the accessibility API.

After access has been granted, the application must be restarted.

Secure Keyboard Entry must be disabled for skhd to receive key-events.

Homebrew:

Requires xcode-8 command-line tools.

  brew install koekeishiya/formulae/skhd
  brew services start skhd

Source:

Requires xcode-8 command-line tools.

  git clone https://github.com/koekeishiya/skhd
  make install      # release version
  make              # debug version

  make fast_profile # release version with profiling information
  make profile      # debug version with profiling information

Usage

-V | --verbose: Output debug information
    skhd -V

-v | --version: Print version number to stdout
    skhd -v

-c | --config: Specify location of config file
    skhd -c ~/.skhdrc

-k | --key: Synthesize a keypress (same syntax as when defining a hotkey)
    skhd -k "shift + alt - 7"

-t | --text: Synthesize a line of text
    skhd -t "hello, worldシ"

Configuration

skhd will load the configuration file $HOME/.skhdrc, unless otherwise specified.

A sample config is available here

A list of all built-in modifier and literal keywords can be found here

A hotkey is written according to the following rules:

hotkey       = <mode> '<' <action> | <action>

mode         = 'name of mode' | <mode> ',' <mode>

action       = <keysym> '[' <proc_map_lst> ']' | <keysym> '->' '[' <proc_map_lst> ']'
               <keysym> ':' <command>          | <keysym> '->' ':' <command>
               <keysym> ';' <mode>             | <keysym> '->' ';' <mode>

keysym       = <mod> '-' <key> | <key>

mod          = 'modifier keyword' | <mod> '+' <mod>

key          = <literal> | <keycode>

literal      = 'single letter or built-in keyword'

keycode      = 'apple keyboard kVK_<Key> values (0x3C)'

proc_map_lst = * <proc_map>

proc_map     = <string> ':' <command>

string       = '"' 'sequence of characters' '"'

command      = command is executed through '$SHELL -c' and
               follows valid shell syntax. if the $SHELL environment
               variable is not set, it will default to '/bin/bash'.
               when bash is used, the ';' delimeter can be specified
               to chain commands.

               to allow a command to extend into multiple lines,
               prepend '\' at the end of the previous line.

               an EOL character signifies the end of the bind.

->           = keypress is not consumed by skhd

A mode is declared according to the following rules:


mode_decl = '::' <name> '@' ':' <command> | '::' <name> ':' <command> |
            '::' <name> '@'               | '::' <name>

name      = desired name for this mode,

@         = capture keypresses regardless of being bound to an action

command  = command is executed through '$SHELL -c' and
           follows valid shell syntax. if the $SHELL environment
           variable is not set, it will default to '/bin/bash'.
           when bash is used, the ';' delimeter can be specified
           to chain commands.

           to allow a command to extend into multiple lines,
           prepend '\' at the end of the previous line.

           an EOL character signifies the end of the bind.