sethvargo/go-envconfig

A simple, zero-dependencies library to parse environment variables into structs

A Go port of Ruby's dotenv library (Loads environment variables from .env files)

Go configuration with fangs

Go library for decoding generic map values into native Go structures and vice versa.

Simple, extremely lightweight, extensible, configuration management library for Go. Supports JSON, TOML, YAML, env, command line, file, S3 etc. Alternative to viper.

💯Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving

Kong is a command-line parser for Go

HCL is the HashiCorp configuration language.

An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags.