Golang html/templates : ParseFiles with custom Delims

Question

Using templates with delimiters works fine when using template.New("...").Delims("[[", "]]").Parse() However, I cannot figure out how to get to the same result with template.ParseFiles()

tmpl, err := template.ParseFiles("base.tmpl", "homepage/inner.tmpl")
if err != nil { panic(err) }
tmpl.Delims("[[", "]]")
p := new(Page) 
err = tmpl.Execute(os.Stdout, p)
if err != nil { panic(err) }

I have no errors, but the Delimiters are not changed.

tmpl, err := template.ParseFiles("base.tmpl", "homepage/inner.tmpl")
t := tmpl.Lookup("base.tmpl").Delims("[[", "]]")
p := new(Page) 
err = t.Execute(os.Stdout, p)
if err != nil { panic(err) }

This leads to the same result.

In case this is relevant, my need is to embed a small angular app in a particular page of my site.

Also, I have a base template with a common HTML structure that I combine with a page-specific template with ParseFiles(), leading to this layout :

/templates/base.tmpl
/templates/homepage/inner.tmpl
/templates/otherpage/inner.tmpl

Is this possible at all ? If so, what am I doing wrong ?

Answer 1

Create a dummy template, set the delimiters and then parse the files:

 tmpl, err := template.New("").Delims("[[", "]]").ParseFiles("base.tmpl", "homepage/inner.tmpl")

This aspect of the API is quirky and not very obvious. The API made more sense in the early days when the template package had the additional Set type