Evaluating a variable as Hugo code? `eval` or `hugoify` function?

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1

Hi, I’m picking up some data from a data file (or possibly front matter?) and am trying to solve this in a generalized fashion…

we have markdownify and plainify to take the context of a variable and convert it, but I don’t see a “hugoify” or “eval” function.

I want to be able to do

data/stuff.yaml:

a: "Some regular text."
b: "{{ ref . `about` }}"
c: "this is a title -- {{ .Title }}"

and then in a theme later:

{{ with .Site.data.stuff.yaml }}
    Your slogan is {{ .a }} <br>
    It can be found at {{ .b }}<br>
    {{ .c }}
{{ end }}

It would currently generate:

Your slogan is: Some regular text.
It can be found at: {{ ref . `about` }}
This is a title {{ .Title }}

When I want to generate:

Your slogan is: Some regular text.
It can be found at: localhost://my-about-page/
This is a title -- The Title of this Page Context

Again, this needs to be a general solution, NOT a type/field specific solution.
Is this possible?

For full context, I’m auto-generating schema.org compatible JSON+LD data at
timer-hugo/seo_schema.html at master · shockwavefound/timer-hugo · GitHub

2

No, it is not.

You could do something like this, but I wouldn’t…

a:
  type: string
  content: Some regular text.
b:
  type: pageReference
  content: "/about"
c:
  type: pageProperty
  content: title

I came up with an eval function a while ago, but I only use for testing and some documentation:
https://discourse.gohugo.io/t/eval-function/32148/5

1 Like
3

Thanks, I’m sorry I missed the earlier thread, not googled enough.
Best,

Paul

4

I don’t think that will do what you want… it doesn’t handle action delimiters {{ }}. You could probably do some regex magic to extract the action contents.

5

yes, I was thinking this would be a good test of the findRESubmatch code

6

So, if you’re gonna do it, use this instead of what was posted way back when:

layouts/partials/eval.html

{{ $f := printf "%d.txt" now.UnixNano }}
{{ $r := printf "{{ %s }}" . | resources.FromString $f }}
{{ $r = $r | resources.ExecuteAsTemplate $f . }}
{{ return $r.Content }}

Example:

{{ $s := slice "add 5 1" "sub 6 2" "mul 7 3" "div 8 4"}}
{{ range $s }}
  {{ $r := partial "eval" . }}
  {{ printf "<pre>%s = %s</pre>" . $r | safeHTML }}
{{ end }}

Result:

add 5 1 = 6
sub 6 2 = 4
mul 7 3 = 21
div 8 4 = 2

I had to use now.UnixNano to get the correct result on a multilingual site, but it works fine with a monolingual site as well.

1 Like
7

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