# Gritty [![License][LicenseIMGURL]][LicenseURL] [![NPM version][NPMIMGURL]][NPMURL] [![Dependency Status][DependencyStatusIMGURL]][DependencyStatusURL] [![Build Status][BuildStatusIMGURL]][BuildStatusURL] [![Coverage Status][CoverageIMGURL]][CoverageURL]

Web terminal emulator. Based on [node-pty](https://github.com/Tyriar/node-pty) and [xterm.js](https://github.com/sourcelair/xterm.js).

![Gritty](https://raw.githubusercontent.com/cloudcmd/gritty/master/img/linux.png "Gritty on Linux")

## Install

`npm i gritty -g`

## Usage

```
Usage: gritty [options]
Options:
  -h, --help              display this help and exit
  -v, --version           output version information and exit
  --path                  output path of a gritty and exit
  --port                  set port number
  --command               command to run in terminal (shell by default)
  --auto-restart          restart command when on exit
  --no-auto-restart       do not restart command on exit
```

### Windows

On `Windows` there is no build tools by default. When can't install `gritty` try to install `windows-build-tools` first.

```sh
npm i windows-build-tools -g
npm i gritty -g
```

![Gritty](https://raw.githubusercontent.com/cloudcmd/gritty/master/img/windows.png "Gritty on Windows")

## Use as standalone

Start `gritty`, and go to url `http://localhost:1337`

## API

### Client API

#### gritty(element [, options])

```js
const prefix = '/gritty'; // default
const env = {}; // default
const fontFamily = 'Courier'; // default

gritty('body', {
    prefix,
    env,
    fontFamily,
});
```

### Server API

#### gritty.listen(socket, [, options])

`Gritty` could be used as middleware:

```js
const prefix = '/gritty'; // default

const auth = (accept, reject) => (username, password) => {
    accept();
};

gritty.listen(socket, {
    prefix,
    auth, // optional
})
```

#### gritty(options)

Middleware function:

```js
const prefix = '/gritty'; // default

gritty({
    prefix,
});
```

## Usage as middleware

To use `gritty` in your programs you should make local install:

`npm i gritty socket.io express --save`

And use it this way:

```js
// server.js

const gritty = require('gritty');
const http = require('http');
const express = require('express');
const io = require('socket.io');

const app = express();
const server = http.createServer(app);
const socket = io.listen(server);

const port = 1337;
const ip = '0.0.0.0';

app.use(gritty())
app.use(express.static(__dirname));

gritty.listen(socket, {
    command: 'mc',      // optional
    autoRestart: true,  // default
});

server.listen(port, ip);
```

If you want dinamically change `env` variables, you can use [socket.request](https://socket.io/docs/server-api/#socket-request) for this purpose:

```js
socket.use((socket, next) => {
    socket.request.env = {
        HELLO: 'world'
    };
    
    next();
});
```

```html
<!-- index.html -->

<div class="gritty"></div>
<script src="/gritty/gritty.js"></script>
<script>
    const options = {
        prefix: 'console',
        command: 'bash', // optional
        autoRestart: true, // optional
        cwd: '/', // optional
        env: {
            TERMINAL: 'gritty',
            CURRENT: getCurrentFile,
        }
    };
    
    gritty('.terminal', options);
    
    function getCurrentFile() {
        return 'filename.txt';
    }
</script>
```

## License

MIT

[NPMIMGURL]:                https://img.shields.io/npm/v/gritty.svg?style=flat&longCache=true

[BuildStatusIMGURL]:        https://img.shields.io/travis/cloudcmd/gritty/master.svg?style=flat&longCache=true

[DependencyStatusIMGURL]:   https://img.shields.io/david/cloudcmd/gritty.svg?style=flat&longCache=true

[LicenseIMGURL]:            https://img.shields.io/badge/license-MIT-317BF9.svg?style=flat&longCache=true

[NPM_INFO_IMG]:             https://nodei.co/npm/cloudcmd.png
[NPMURL]:                   https://npmjs.org/package/cloudcmd "npm"
[BuildStatusURL]:           https://travis-ci.org/cloudcmd/gritty  "Build Status"
[DependencyStatusURL]:      https://david-dm.org/cloudcmd/gritty "Dependency Status"
[LicenseURL]:               https://tldrlegal.com/license/mit-license "MIT License"
[CoverageURL]:              https://coveralls.io/github/cloudcmd/gritty?branch=master
[CoverageIMGURL]:           https://coveralls.io/repos/cloudcmd/gritty/badge.svg?branch=master&service=github