# zsh-autosuggestions

_[Fish](http://fishshell.com/)-like fast/unobtrusive autosuggestions for zsh._

It suggests commands as you type, based on command history.


## Installation

1. Clone this repository somewhere on your machine. This guide will assume `~/.zsh/zsh-autosuggestions`.

    ```sh
    git clone git://github.com/tarruda/zsh-autosuggestions ~/.zsh/zsh-autosuggestions
    ```

2. Add the following to your `.zshrc`:

    ```sh
    source ~/.zsh/zsh-autosuggestions/dist/autosuggestions.zsh
    autosuggest_start
    ```

    **Note:** If you're using other zle plugins like `zsh-syntax-highlighting` or `zsh-history-substring-search`, check out the [section on compatibility](#compatibility-with-other-zle-plugins) below.


## Usage

As you type commands, you will see a completion offered after the cursor in a muted gray color. This color can be changed by setting the `ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE` variable. See [configuration](#configuration).

If you press the <kbd>→</kbd> key (`forward-char` widget) or <kbd>End</kbd> (`end-of-line` widget) with the cursor at the end of the buffer, it will accept the suggestion, replacing the contents of the command line buffer with the suggestion.

If you invoke the `forward-word` widget, it will partially accept the suggestion up to the point that the cursor moves to.


## Configuration

You may want to override the default global config variables after sourcing the plugin. Default values of these variables can be found [here](/tarruda/zsh-autosuggestions/blob/master/src/config.zsh).


### Suggestion Highlight Style

Set `ZSH_AUTOSUGGEST_HIGHLIGHT_STYLE` to configure the style that the suggestion is shown with. The default is `fg=8`.


### Widget Mapping

This plugin works by triggering custom behavior when certain [zle widgets](http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Zle-Widgets) are invoked. You can add and remove widgets from these arrays to change the behavior of this plugin:

- `ZSH_AUTOSUGGEST_CLEAR_WIDGETS`: Widgets in this array will clear the suggestion when invoked.
- `ZSH_AUTOSUGGEST_MODIFY_WIDGETS`: Widgets in this array will modify the buffer and fetch a new suggestion when invoked.
- `ZSH_AUTOSUGGEST_ACCEPT_WIDGETS`: Widgets in this array will accept the suggestion when invoked.
- `ZSH_AUTOSUGGEST_PARTIAL_ACCEPT_WIDGETS`: Widgets in this array will partially accept the suggestion when invoked.

**Note:** These arrays must be set before calling `autosuggest_start`.

**Note:** A widget shouldn't belong to more than one of the above arrays.


### Key Bindings

This plugin provides two widgets that you can use with `bindkey`:

1. `autosuggest-accept`: Accepts the current suggestion.
2. `autosuggest-clear`: Clears the current suggestion.

For example, this would bind <kbd>ctrl</kbd> + <kbd>space</kbd> to accept the current suggestion.

```sh
bindkey '^ ' autosuggest-accept
```


## Compatibility With Other ZLE Plugins


### [`zsh-syntax-highlighting`](https://github.com/zsh-users/zsh-syntax-highlighting)

Source `zsh-autosuggestions.zsh` *before* `zsh-syntax-highlighting`.

Call `autosuggest_start` *after* sourcing `zsh-syntax-highlighting`.

For example:

```sh
source ~/.zsh/zsh-autosuggestions/dist/autosuggestions.zsh
source ~/.zsh/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh

autosuggest_start
```


### [`zsh-history-substring-search`](https://github.com/zsh-users/zsh-history-substring-search)

When the buffer is empty and one of the `history-substring-search-up/down` widgets is invoked, it will call the `up/down-line-or-history` widget. If the `up/down-line-or-history` widgets are in `ZSH_AUTOSUGGEST_CLEAR_WIDGETS` (the list of widgets that clear the suggestion), this can create an infinite recursion, crashing the shell session.

For best results, you'll want to remove `up-line-or-history` and `down-line-or-history` from `ZSH_AUTOSUGGEST_CLEAR_WIDGETS`:

```
# Remove *-line-or-history widgets from list of widgets that clear the autosuggestion to avoid conflict with history-substring-search-* widgets
ZSH_AUTOSUGGEST_CLEAR_WIDGETS=("${(@)ZSH_AUTOSUGGEST_CLEAR_WIDGETS:#(up|down)-line-or-history}")
```

Additionally, the `history-substring-search-up` and `history-substring-search-down` widgets are not bound by default. You'll probably want to add them to `ZSH_AUTOSUGGEST_CLEAR_WIDGETS` so that the suggestion will be cleared when you start searching through history:

```sh
# Add history-substring-search-* widgets to list of widgets that clear the autosuggestion
ZSH_AUTOSUGGEST_CLEAR_WIDGETS+=(history-substring-search-up history-substring-search-down)
```

Make sure you add/remove these widgets *before* calling `autosuggest_start`.

For example:

```sh
source ~/.zsh/zsh-autosuggestions/dist/autosuggestions.zsh
source ~/Code/zsh-history-substring-search/zsh-history-substring-search.zsh

ZSH_AUTOSUGGEST_CLEAR_WIDGETS=("${(@)ZSH_AUTOSUGGEST_CLEAR_WIDGETS:#(up|down)-line-or-history}")
ZSH_AUTOSUGGEST_CLEAR_WIDGETS+=(history-substring-search-up history-substring-search-down)

autosuggest_start
```


## Uninstallation

1. Remove the code referencing this plugin from `~/.zshrc`.

2. Remove the git repository from your hard drive

    ```sh
    rm -rf ~/.zsh/zsh-autosuggestions # Or wherever you installed
    ```


## License

This project is licensed under [MIT license](http://opensource.org/licenses/MIT).
For the full text of the license, see the [LICENSE](LICENSE) file.