Starenv

starenv (*env) allows populating environmental variables from variety of sources, such as AWS Parameter Store, GPG encrypted files and more, with extreme ease.

For the impatient, import the autoload package and you're set:

package main

import (
  "fmt"
  "os"

  _ "github.com/oxplot/starenv/autoload"
)

func main() {
  fmt.Printf("GITHUB_TOKEN=%s\n", os.Getenv("GITHUB_TOKEN"))
}

and set the value of the environmental variable to load from Parameter Store:

$ export GITHUB_TOKEN=*ssm:/github_token
$ go run main.go
GITHUB_TOKEN=abcdef-1235143-abcdef-123-abcdef-12314

or from a GPG encrypted file:

$ export GITHUB_TOKEN=*gpg*file:github_token.gpg
$ go run main.go
GITHUB_TOKEN=abcdef-1235143-abcdef-123-abcdef-12314

why not ditch the file and embed its content:

$ export GITHUB_TOKEN=*gpg*b64:eNeO7D2rBrBOOcW6TuETyHdyPEOaAfdgaTzgOTSvROI=
$ go run main.go
GITHUB_TOKEN=abcdef-1235143-abcdef-123-abcdef-12314

and thanks to the amazing godotenv which is run as part of starenv's autoload package, you can even do:

$ echo 'GITHUB_TOKEN=*keyring:awesome_app/github_token' > .env
$ go run main.go
GITHUB_TOKEN=abcdef-1235143-abcdef-123-abcdef-12314

For a full list, see the docs.