[golang] env -> variable

package main

import (
   "os"
   "strings"
   "text/template"
)

func Format(s string, v interface{}) string {
   t, b := new(template.Template), new(strings.Builder)
   template.Must(t.Parse(s)).Execute(b, v)

   result := b.String()
   if result == "<no value>" {
      return s
   }

   return result
}

func KeyValue(item string) (key, val string) {
   splits := strings.Split(item, "=")
   key = splits[0]
   val = splits[1]
   return
}

func Env() map[string]string {
   data := os.Environ()

   items := make(map[string]string)
   for _, item := range data {
      key, val := KeyValue(item)
      items[key] = val
   }

   return items
}

func main() {
   response := Format("{{ .asdf }}", Env())

   println(response)
}

https://stackoverflow.com/questions/19612449/default-value-in-gos-method

Default value in Go's method

https://stackoverflow.com/questions/19761393/why-does-go-have-typed-nil

Why does Go have typed nil?

https://gist.github.com/naveensrinivasan/5846791

Here is a code to get the environment variables as a map in go instead of slice.