typed-config

Why?

Configuration management is hard.
* Multiple environments mean multiple .env files
* .env files are a list of keys and values, they have no structure
* No runtime validation (you can check for existence of environment variables, but not much more (easily))
* No dev time help (autosuggestions)
* How to populate secrets secrets safely (and for multiple environments, possibly with different encyrption keys and in isolated environments)?
* How to allow developers to specify secrets without having access to these secrets?

## How?

* Create a ./config directory in your project root
* Add a default.yml in this folder and populate it with your configuration
``yaml
# example for bunyan logger config
logger:
name: my-awesome-project
level: info
`
* Create a class that represents your configuration using the amazing class-validator to define validations
``typescript
import { IsDefined } from 'class-validator'
import { LoggerOptions } from 'bunyan'
export class Config {
@IsDefined()
logger: LoggerOptions
}
`
* In the index.ts (or whatever your main file is) load the config
`typescript
import { loadConfig } from '@barath/typed-config'
import { Config } from './lib/config'
import bunyan from 'bunyan'
export const config = loadConfig(Config)
export const logger = bunyan.createLogger(config.logger)

logger.info('hello world')
``