Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security Policy
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

env

package module

Go to main page

Versions in this module

v0

v0.12.0

May 2, 2024

Changes in this version

type Options

+ NameSep string

v0.11.0

Mar 13, 2024

v0.10.0

Dec 23, 2023

Changes in this version

+ type Options struct

+ SliceSep string

+ Source Source

+ type Source interface

+ LookupEnv func(key string) (value string, ok bool)

type Var

+ Usage string

v0.9.0

Apr 22, 2023

Changes in this version

+ var ErrEmptyTagName = errors.New("env: empty tag name is not allowed")

+ var ErrInvalidArgument = errors.New("env: argument must be a non-nil struct pointer")

+ var ErrInvalidTagOption = errors.New("env: invalid tag option")

+ var ErrUnsupportedType = errors.New("env: unsupported type")

+ var Usage = func(w io.Writer, vars []Var)

+ func Load(dst any, opts ...Option) error

+ func LoadFrom(p Provider, dst any, opts ...Option) error

+ type Map map[string]string

+ func (m Map) LookupEnv(key string) (string, bool)

+ type NotSetError struct

+ Names []string

+ func (e *NotSetError) Error() string

+ type Option func(*loader)

+ func WithPrefix(prefix string) Option

+ func WithSliceSeparator(sep string) Option

+ func WithStrictMode() Option

+ func WithUsageOnError(w io.Writer) Option

+ type Provider interface

+ LookupEnv func(key string) (value string, ok bool)

+ var OS Provider = ProviderFunc(os.LookupEnv)

+ func MultiProvider(ps ...Provider) Provider

+ type ProviderFunc func(key string) (value string, ok bool)

+ func (f ProviderFunc) LookupEnv(key string) (string, bool)

+ type Var struct

+ Default string

+ Desc string

+ Expand bool

+ Name string

+ Required bool

+ Type reflect.Type