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**skhd** is a simple hotkey daemon for macOS. It is a stripped version of [**khd**](https://github.com/koekeishiya/khd)
(although rewritten from scratch), that sacrifices the more advanced features in favour of increased responsiveness and performance.
**skhd** uses a subset of the grammar that **khd** uses. In other words, **khd** is able to load and run **skhd** config files without having
to make any changes to the file. This makes it very simple to migrate between **skhd** and **khd** on demand.
**skhd** is able to hotload its config file, meaning that hotkeys can be edited and updated live while **skhd** is running.
**skhd** has an improved parser that is able to accurately identify both the line and character position of any symbol that does not
follow the correct grammar rules for defining a hotkey. If a syntax error is detected during parsing, the parser will print the error and abort.
**skhd** will still continue to run and when the syntax error has been fixed, it will automatically reload and reparse the config file.
feature comparison between **skhd** and **khd**
| feature | skhd | khd |
|:--------------------------:|:----:|:---:|
| hotload config file | [x] | [ ] |
| store hotkey in hashmap | [x] | [ ] |
| store hotkey in linked-list| [ ] | [x] |
| require unix domain socket | [ ] | [x] |
| hotkey passthrough | [x] | [x] |
| modal hotkey-system | [ ] | [x] |
| application specific hotkey| [ ] | [x] |
| modifier only hotkey | [ ] | [x] |
| caps-lock as hotkey | [ ] | [x] |
| mouse-buttons as hotkey | [ ] | [x] |
| emit keypress | [ ] | [x] |
| autowrite text | [ ] | [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**:
brew install koekeishiya/formulae/skhd
brew services start skhd
stdout -> /tmp/skhd.out
stderr -> /tmp/skhd.err
**Source**:
Requires xcode-8 command-line tools,
make install # release version
make # debug version
### Usage
```
-v | --version: Print version number to stdout
skhd -v
-c | --config: Specify location of config file
skhd -c ~/.skhdrc
```
### Configuration
**skhd** will load the configuration file `$HOME/.skhdrc`, unless otherwise specified.
A sample config is available [here](https://github.com/koekeishiya/skhd/blob/master/examples/skhdrc)
A list of all built-in modifier and literal keywords can be found [here](https://github.com/koekeishiya/skhd/issues/1)
A hotkey is written according to the following rules:
```
hotkey = <keysym> ':' <command> |
<keysym> '->' ':' <command>
keysym = <mod> '-' <key> | <key>
mod = 'built-in mod keyword' | <mod> '+' <mod>
key = <literal> | <keycode>
literal = 'single letter or built-in keyword'
keycode = 'apple keyboard kVK_<Key> values (0x3C)'
-> = keypress is not consumed by skhd
command = command is executed through '$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.
```
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