I’m exploring the capabilities of Caddy’s template system and have built a simple base template in the index.html file. My goal is to use this template as the base for all other pages by only overriding a few selected blocks from the base. This does not work as I expected, however.
This is a simplified example of my code:
index.html:
{{ block "baseTemplate" . }}
<html>
{{ block "head" . }}<head>...head code goes here</head>{{ end }}
<body>
{{ block "header" . }}<header>...head code goes here</header>{{ end }}
{{ block "main" . }}<main>...most of the page content goes here</main>{{ end }}
</body>
</html>
{{ end }}
This works great! Everything is rendered as expected when hitting my index.html. Fetching my “baseTemplate” into another page also works without problems by doing this:
about-us.html:
{{ import "/index.html" }}
{{ template "baseTemplate" }}
Trying to override the main block however, does not work. The content from “main” is the same as the original content in the index.html:
{{ import "/index.html" }}
{{ define "main" }}<main>...new content goes here</main>{{ end }}
{{ template "baseTemplate" }}
Why does this not work? It sure would be really handy to construct a base template like this to keep things DRY 
EDIT: To make sure the problem wasn’t that I have nested the blocks, I tried defining the baseTemplate instead of the main, but with the same result.
EDIT2: Go’s documentation leaves me with the impression that what I have done should be possible:
{{block "name" pipeline}} T1 {{end}}
A block is shorthand for defining a template
{{define "name"}} T1 {{end}}
and then executing it in place
{{template "name" pipeline}}
The typical use is to define a set of root templates that are
then customized by redefining the block templates within.