spf13/viper

Config
import "github.com/spf13/viper"

Complete configuration solution for Go applications supporting JSON, TOML, YAML, env vars, and more.

Example

package main

import (
    "fmt"
    "github.com/spf13/viper"
)

func main() {
    viper.SetConfigName("config")
    viper.AddConfigPath(".")
    viper.ReadInConfig()
    fmt.Println(viper.GetString("app.name"))
}

Key Types & Functions

SetConfigNameReadInConfigGetStringGetIntSetDefaultAutomaticEnv

About spf13/viper

The spf13/viper package (imported as github.com/spf13/viper) belongs to the Config category of Go packages. Complete configuration solution for Go applications supporting JSON, TOML, YAML, env vars, and more.

Go's standard library is one of the language's greatest strengths, providing production-ready implementations for networking, cryptography, encoding, I/O, and more. The spf13/viper package follows Go's philosophy of simplicity and composability — small, focused packages that combine through interfaces like io.Reader and io.Writer.

When using spf13/viper in production, follow Go best practices: handle errors explicitly, use context for cancellation and timeouts, prefer composition over inheritance, and write table-driven tests. The Go documentation at pkg.go.dev provides comprehensive API references and examples for every exported type and function.

Related Packages

spf13/cobraosencoding/jsonflag