configtmpl

Documentation

Overview

Package configtmpl provides template functions for ue in config source templates.

Index

• func Default(def, v any) any
• func Env(key string) string

Examples

• Default
• Default (Nil)
• Default (Zero)
• Env

Functions

func Default

func Default(def, v any) any

Default returns the provided def value if v is either nil or the zero value for its type.

Example

def := "good bye"
v := "hello world"

fmt.Println(Default(def, v))

Output:

hello world

Example (Nil)

fmt.Println(Default("WORLD", nil))

Output:

WORLD

Example (Zero)

var v int
fmt.Println(Default(10, v))

Output:

10

func Env

func Env(key string) string

Env returns the environment variable value for the given key or an empty string, if the environment variable does not exist.

Example

os.Setenv("HELLO", "WORLD")
defer os.Unsetenv("HELLO")

fmt.Println(Env("HELLO"))

Output:

WORLD