env

Documentation

Index

• Variables
• func Expand(value string) string
• func Get(names ...string) string
• func GetVal(val *string, names ...string)
• func List() map[string]string
• func Lookup(key string) (string, bool)
• func Set(key, value string) error
• func Unsetenv(key string) error

Variables

var Prefix string

环境变量的前缀

Functions

func Expand

func Expand(value string) string

ExpandEnv returns value of convert with environment variable. Return environment variable if value start with "${" and end with "}". Return default value if environment variable is empty or not exist.

It accept value formats "${env}" , "${env||}}" , "${env||defaultValue}" , "defaultvalue". Examples:

v1 := config.ExpandValueEnv("${GOPATH}")			// return the GOPATH environment variable.
v2 := config.ExpandValueEnv("${GOAsta||/usr/local/go}")	// return the default value "/usr/local/go/".
v3 := config.ExpandValueEnv("Astaxie")				// return the value "Astaxie".

func Get

func Get(names ...string) string

func GetVal

func GetVal(val *string, names ...string)

func List

func List() map[string]string

func Lookup

func Lookup(key string) (string, bool)

func Set

func Set(key, value string) error

func Unsetenv

func Unsetenv(key string) error