# ssb-npm-registry

Serve an npm registry server backed by SSB.

## Install

```
BLOB_ID="$(sbot links2.read --query '[{"$filter":{"rel":["mentions",{"$prefix":"npm:ssb-npm-registry:"}]}}, {"$map":"dest"} ]'|grep -o '&.*sha256'|tail -n 1)" &&
sbot plugins.install ssb-npm-registry --from "http://localhost:8989/blobs/get/$BLOB_ID" &&
sbot plugins.enable ssb-npm-registry
# restart sbot
```

## Develop

### Install with git-ssb:

As a scuttlebot plugin:
```
git clone ssb://#ssb-npm-registry ~/.ssb/node_modules/ssb-npm-registry
sbot plugins.enable ssb-npm-registry
# restart sbot
```

Or run standalone with [ssb-party](%bS/WGqQrhQfH8eoyWieK+9M56DjJ8Q4ulkvb6sXZwPo=.sha256):
```
git clone ssb://#ssb-npm-registry
ssb-party \#ssb-npm-registry
```

Set ssb-npm-registry as your default registry server:
```
npm config set registry http://localhost:8043
```

## Config

`~/.ssb/config` example:
```
{
  "npm": {
    "host": "localhost",
    "port": 8043,
    "autoAuth": true,
    "fetchAll": true
  }
}
```
- `config.npm.host`: hostname to listen on. default is "localhost"
- `config.npm.port`: hostname to listen on. default is 8043
- `config.npm.autoAuth`: whether to automatically update `~/.npmrc` to add
- `config.npm.fetchAll`: whether to fetch blobs for all versions of a package,
  to populate package metadata, for a request to a `/<package>` path. Some npm
  clients require this. default is `null`, which means it will be decided for
  each request based on the user-agent header.

## API

```
var Registry = require('ssb-npm-registry')
```

### `var serve = Registry.respond(sbot, config)`

Embed ssb-npm-registry into other applications using the `respond` method
which returns a `(req, res)` HTTP handler function, which can be passed to a
HTTP server:

```
var server = require('http').createServer(serve)
```

When using this method, the config properties `npm.host`, `npm.port` and
`npm.autoAuth` do not have an effect, and `~/.npmrc` is not modified.

### `Registry.publishPkgMentions(sbot, mentions, cb(err, msgs))`

Publish the given npm package mentions as one or more messages

## Routes

In addition to the npm registry routes, ssb-npm-registry's web server (and
`respond` method) serve the following additional routes:

### `/-/prebuild/:name` - Prebuild blobs

`name` should be the name of a blob in the format
`{name}-v{version}-{runtime}-v{abi}-{platform}{libc}-{arch}.tar.gz`.

This route looks up mentions for blobs with the given name prefixed by
`"prebuild:"`. If the name maps to exactly one blob, the route redirects to the
local ssb-ws URL for that blob.

Example:

- npm installs leveldown v1.9.0 on node v57 on linux, arm
- [`prebuild-install`][] fetches `http://localhost:8043/-/prebuild/leveldown-v1.9.0-node-v57-linux-arm.tar.gz`
- `ssb-npm-registry` queries mentions of name `prebuild:leveldown-v1.9.0-node-v57-linux-arm.tar.gz`
  and then redirects to `http://localhost:8989/blobs/get/&wSehVYRREEqZhZgpMk82CHcXVNcPqXDacgj3Tit7TMc=.sha256`

[`prebuild-install`]: https://github.com/prebuild/prebuild-install

## Bootstrapping Scuttlebot

This plugin includes a script for securely bootstrapping an npm-installation of scuttlebot from your machine to a peer's machine.

Steps for bootstrapping:

- Find your local IP.
- In your web browser, go to your IP, port 8043 (or other port, if you set
    `config.npm.port`).
- Click the "bootstrap" link.
- Send that URL to your peer.
- Check that your peer sees the same hash on the bootstrap page as you do.
- While you are still online, have your peer run the script on that page.
- When your peer's sbot is running, verify that they have the same hash at
    their `http://localhost:8043/bootstrap` page.
- Proceed with gossip/pub onboarding.

Note about prebuilds: the bootstrap npm registry server script serves prebuilds
as blobs from your npm prebuilds cache directory at `~/.npm/_prebuilds/`.
Therefore, if you use the bootstrap script to install scuttlebot to a machine
with a different architecture or node API, it might not fetch all of the host's
prebuilds. In this case, the new node may have to compile modules, and it may
result in a different bootstrap hash from the node that served the bootstrap
sript.

## License

Copyright (C) 2017 Secure Scuttlebutt Consortium

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.