GoConfig

A Go port of Node.js config package (which uses json files to configure application)

From original Library:

Library organizes hierarchical configurations for your app deployments. It lets you define a set of default parameters, and extend them for different deployment environments (development, qa, staging, production, etc.).

Installation

As a library

go get github.com/hop-/goconfig

Usage:

All config files are in HOST_CONFIG_DIR directory, default is 'config'

It is using HOST_ENV environment variable to define the application deployment environment

$HOST_CONFIG_DIR/default.json:

{
  "Customer": {
    "db": {
      "host": "localhost",
      "port": 27017,
      "dbName": "customers"
    },
    "credit": {
      "initialLimit": 100,
      "initialDays": 1
    }
  }
}

Override some configurations for production when HOST_ENV is 'production'.

$HOST_CONFIG_DIR/production.json:

{
  "Customer": {
    "credit": {
      "initialDays": 30
    }
  }
}

Use config in your code:

import "github.com/hop-/goconfig"

type Consumer struct {
  Consumer struct {
    Db struct {
      host string
      port int
      dbName string
    }
    Credit struct {
      InitialLimit int
      InitialDays int
    }
  }
}

func main() {
  if err := goconfig.Load(); err != nil {
    // Some error handling
  }

  consumer, err := goconfig.Get[Consumer]("Consumer")
  if err != nil {
    // Some error handling
  }

  host, err := goconfig.Get[string]("Consumer.Db.host")
  if err != nil {
    // Some error handling
  }

  // Your code
}