SapanPatibandha / ENV_in_Golang

https://youtu.be/mnCgl-iwPak

Enveronment veriables in Golang

This example is inspired from this

ENV veriables are key values pares. If you pass key, it will return value related to key.

We should not commit important or secreat information to Git. So to keep sensitive information to secreate level, we need to use env.

Each process get its own seperate set of env variables. Veriable set in applicaiton are not impact other enveronment.

package main

import (
	"fmt"
	"os"

	"github.com/joho/godotenv"
)

func main() {
	fmt.Println("HOME: ", os.Getenv("HOME"))

	shell, ok := os.LookupEnv("SHELL")
	if !ok {
		fmt.Println("the env var SHELL is not set")
	} else {
		fmt.Println("SHELL: ", shell)
	}

	err := os.Setenv("NAME", "Sapan Patibandha")
	if err != nil {
		fmt.Println("Could not set the env var NAME")
	}

	fmt.Printf("Name: %s\n", os.Getenv("NAME"))

	envErr := godotenv.Load(".env")

	if envErr != nil {
		fmt.Println("Could not load env file")
		os.Exit(1)
	}

	fmt.Printf("API_KEY %s\n", os.Getenv("API_KEY"))
	fmt.Printf("DB_PASS %s\n", os.Getenv("DB_PASS"))

	envMap, mapErr := godotenv.Read(".env")

	if mapErr != nil {
		fmt.Printf("Error loading .env into map[string]string\n")
		os.Exit(1)
	}

	fmt.Printf("API_KEY from godotenv %s\n", envMap["API_KEY"])
	fmt.Printf("DB_PASS from godotenv %s\n", envMap["DB_PASS"])
}