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

environmentasmap.go

 package main

import (
    "fmt"
    "os"
    "strings"
)

func main() {
    getenvironment := func(data []string, getkeyval func(item string) (key, val string)) map[string]string {
        items := make(map[string]string)
        for _, item := range data {
            key, val := getkeyval(item)
            items[key] = val
        }
        return items
    }
    environment := getenvironment(os.Environ(), func(item string) (key, val string) {
        splits := strings.Split(item, "=")
        key = splits[0]
        val = splits[1]
        return
    })
    fmt.Println(environment["KEY"])
}

awesome!

how it is?

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)
}

a=b=c want： a b=c