The text Template can accept an arbitrary data:
func (t *Template) Execute(wr io.Writer, data interface{}) error
<https://godoc.org/text/template#Template.Execute>
What I'm trying to do is to provide a general library that take an
arbitrary data just like the text Template does, then add more data to it
(a map of environment variables and their values to be exactly), then pass
to the text Template, as data
<https://godoc.org/text/template#Template.Execute>. What's the best way to
do it?
I've build 99% of code at:
https://play.golang.org/p/MKY9Bq-H-AL
func generic(templateStr string, data interface{}) {
tmpl, err := template.New("test").Parse(templateStr)
check(err)
err = tmpl.Execute(os.Stdout, data)
check(err)
// now
env := make(map[string]string)
for _, e := range os.Environ() {
sep := strings.Index(e, "=")
env[e[0:sep]] = e[sep+1:]
}
// how to add env into data as ENV so that it can be accessed within
template,
// e.g., {{.ENV.SHELL}}?
}
Thanks for your help!
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