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astro/packages/integrations/deno/README.md
Matthew Phillips 6fd161d769
Add the output option (#4015)
* Start of work on astroConfig.mode === 'server'

* Add tests and more

* adapter -> deploy in some places

* Add fallback for `adapter` config

* Update more tests

* Update image tests

* Fix clientAddress test

* Updates based on PR review

* Add a changeset

* Update integrations tests + readme

* Oops

* Remove old option

* Rename `mode` to `output`

* Update Node adapter test

* Update test

* fred pass

* fred pass

* fred pass

* fix test

Co-authored-by: Fred K. Schott <fkschott@gmail.com>
2022-07-25 00:18:02 -04:00

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# @astrojs/deno 🦖
This adapter allows Astro to deploy your SSR site to Deno targets.
- <strong>[Why Astro Deno](#why-astro-deno)</strong>
- <strong>[Installation](#installation)</strong>
- <strong>[Usage](#usage)</strong>
- <strong>[Configuration](#configuration)</strong>
- <strong>[Examples](#examples)</strong>
- <strong>[Troubleshooting](#troubleshooting)</strong>
- <strong>[Contributing](#contributing)</strong>
- <strong>[Changelog](#changelog)</strong>
## Why Astro Deno
If you're using Astro as a static site builder—its behavior out of the box—you don't need an adapter.
If you wish to [use server-side rendering (SSR)](https://docs.astro.build/en/guides/server-side-rendering/), Astro requires an adapter that matches your deployment runtime.
[Deno](https://deno.land/) is a runtime similar to Node, but with an API that's more similar to the browser's API. This adapter provides access to Deno's API and creates a script to run your project on a Deno server.
## Installation
First, install the `@astrojs/deno` package using your package manager. If you're using npm or aren't sure, run this in the terminal:
```sh
npm install @astrojs/deno
```
Then, install this adapter in your `astro.config.*` file using the `adapter` property:
__`astro.config.mjs`__
```js
import { defineConfig } from 'astro/config';
import deno from '@astrojs/deno';
export default defineConfig({
// ...
output: 'server',
adapter: deno()
});
```
## Usage
After [performing a build](https://docs.astro.build/en/guides/deploy/#building-your-site-locally) there will be a `dist/server/entry.mjs` module. You can start a server by importing this module in your Deno app:
```js
import './dist/entry.mjs';
```
See the `start` option below for how you can have more control over starting the Astro server.
You can also run the script directly using deno:
```sh
deno run --allow-net --allow-read --allow-env ./dist/server/entry.mjs
```
## Configuration
To configure this adapter, pass an object to the `deno()` function call in `astro.config.mjs`.
__`astro.config.mjs`__
```js
import { defineConfig } from 'astro/config';
import deno from '@astrojs/deno';
export default defineConfig({
output: 'server',
adapter: deno({
//options go here
})
});
```
<details>
<summary><strong>start</strong></summary>
This adapter automatically starts a server when it is imported. You can turn this off with the `start` option:
```js
import { defineConfig } from 'astro/config';
import deno from '@astrojs/deno';
export default defineConfig({
output: 'server',
adapter: deno({
start: false
})
});
```
If you disable this, you need to write your own Deno web server. Import and call `handle` from the generated entry script to render requests:
```ts
import { serve } from "https://deno.land/std@0.132.0/http/server.ts";
import { handle } from './dist/entry.mjs';
serve((req: Request) => {
// Check the request, maybe do static file handling here.
return handle(req);
});
```
</details>
<details>
<summary><strong>port</strong> and <strong>hostname</strong></summary>
You can set the port (default: `8085`) and hostname (default: `0.0.0.0`) for the deno server to use. If `start` is false, this has no effect; your own server must configure the port and hostname.
```js
import { defineConfig } from 'astro/config';
import deno from '@astrojs/deno';
export default defineConfig({
output: 'server',
adapter: deno({
port: 8081,
hostname: 'myhost'
})
});
```
</details>
## Examples
The [Astro Deno](https://github.com/withastro/astro/tree/main/examples/deno) example includes a `preview:deno` command that runs the entry script directly. Run `npm run build` then `npm run preview:deno` to run the production deno server.
## Troubleshooting
For help, check out the `#support-threads` channel on [Discord](https://astro.build/chat). Our friendly Support Squad members are here to help!
You can also check our [Astro Integration Documentation][astro-integration] for more on integrations.
## Contributing
This package is maintained by Astro's Core team. You're welcome to submit an issue or PR!
## Changelog
See [CHANGELOG.md](CHANGELOG.md) for a history of changes to this integration.
[astro-integration]: https://docs.astro.build/en/guides/integrations-guide/