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verdaccio/website/docs/programmatically.md
Juan Picado aea3b9ddaf
add docker examples to use plugins with docker files (#3217)
* add docker examples to use plugins at docker

* Update Dockerfile

* chore: add v6 examples
2022-06-14 18:33:27 +02:00

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---
id: verdaccio-programmatically
title: "Node.js API"
---
Verdaccio is a binary command which is available in your enviroment when you install globally the package eg `npm i -g verdaccio`, but also can be dependency in your project and use it programmatically.
### Using `fork` from `child_process` module
Using the binary is the faster way to use verdaccio programatically, you need to add to the config file the `_debug: true` to enable the messaging system, when verdaccio is ready will send `verdaccio_started` string as message as the following example.
> If you are using ESM modules the `require` won't be available.
```typescript
export function runRegistry(
args: string[] = [],
childOptions: {}
): Promise<ChildProcess> {
return new Promise((resolve, reject) => {
const childFork = fork(require.resolve('verdaccio/bin/verdaccio'), args, childOptions);
childFork.on('message', (msg: {verdaccio_started: boolean}) => {
if(msg.verdaccio_started){
resolve(childFork);
}
});
childFork.on('error', (err: any) => reject([err]));
childFork.on('disconnect', (err: any) => reject([err]));
});
}
```
You can see the full example on this repository.
[https://github.com/juanpicado/verdaccio-fork](https://github.com/juanpicado/verdaccio-fork
)
### Using the module API
Feature available in `v5.11.0` and higher.
> Using const verdaccio = require('verdaccio'); as the default module is not encoraged, it's deprecated and recommend use `runServer` for future compability.
There are three ways to use it:
- No input, it will find the `config.yaml` as is you would run `verdaccio` in the console.
- With a absolute path.
- With an object (there is a catch here, see below).
```js
const {runServer} = require('verdaccio');
const app = await runServer(); // default configuration
const app = await runServer('./config/config.yaml');
const app = await runServer({ configuration });
app.listen(4000, (event) => {
// do something
});
```
With an object you need to add `self_path`, manually (it's not nice but would be a breaking change changing it now) on v6 this is not longer need it.
```js
const {runServer, parseConfigFile} = require('verdaccio');
const configPath = join(__dirname, './config.yaml');
const c = parseConfigFile(configPath);
// workaround
// on v5 the `self_path` still exists and will be removed in v6
c.self_path = 'foo';
runServer(c).then(() => {});
```
Feature available minor than `v5.11.0`.
> This is a valid way but is discoragued for future releases.
```js
const fs = require('fs');
const path = require('path');
const verdaccio = require('verdaccio').default;
const YAML = require('js-yaml');
const getConfig = () => {
return YAML.safeLoad(fs.readFileSync(path.join(__dirname, 'config.yaml'), 'utf8'));
}
const cache = path.join(__dirname, 'cache');
const config = Object.assign({}, getConfig(), {
self_path: cache
});
verdaccio(config, 6000, cache, '1.0.0', 'verdaccio', (webServer, addrs, pkgName, pkgVersion) => {
try {
webServer.unref();
webServer.listen(addrs.port || addrs.path, addrs.host, () => {
console.log('verdaccio running');
});
} catch (error) {
console.error(error);
}
});
```