Environment Variables

You can map flags to environment variables using the env tag. If the flag is not provided on the command line, the library will look up the specified environment variable.

Usage

type AuthCmd struct {
    ApiKey string `cli:"api-key" env:"API_KEY" help:"API Key for authentication"`
}

In this example, if the user does not provide --api-key, the library will check the API_KEY environment variable.

Priority Order:
1. Command Line Flag
2. Environment Variable
3. Default Value