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resources.FromString

The resources.FromString function returns a resource created from a string, caching the result using the target path as its cache key.

Hugo publishes the resource to the target path when you call its Publish, Permalink, or RelPermalink methods.

Let's say you need to publish a file named "site.json" in the root of your public directory, containing the build date, the Hugo version used to build the site, and the date that the content was last modified. For example:

{
  "build_date": "2024-02-19T12:27:05-08:00",
  "hugo_version": "0.128.0",
  "last_modified": "2024-02-19T12:01:42-08:00"
}

Place this in your baseof.html template:

{{ if .IsHome }}
  {{ $rfc3339 := "2006-01-02T15:04:05Z07:00" }}
  {{ $m := dict
    "hugo_version" hugo.Version
    "build_date" (now.Format $rfc3339)
    "last_modified" (site.Lastmod.Format $rfc3339)
  }}
  {{ $json := jsonify $m }}
  {{ $r := resources.FromString "site.json" $json }}
  {{ $r.Publish }}
{{ end }}

The example above:

  1. Creates a map with the relevant key-value pairs using the dict function
  2. Encodes the map as a JSON string using the jsonify function
  3. Creates a resource from the JSON string using the resources.FromString function
  4. Publishes the file to the root of the public directory using the resource's .Publish method

Combine resources.FromString with resources.ExecuteAsTemplate if your string contains template actions. Rewriting the example above:

{{ if .IsHome }}
  {{ $string := `
    {{ $rfc3339 := "2006-01-02T15:04:05Z07:00" }}
    {{ $m := dict
      "hugo_version" hugo.Version
      "build_date" (now.Format $rfc3339)
      "last_modified" (site.Lastmod.Format $rfc3339)
    }}
    {{ $json := jsonify $m }}
    `
  }}
  {{ $r := resources.FromString "" $string }}
  {{ $r = $r | resources.ExecuteAsTemplate "site.json" . }}
  {{ $r.Publish }}
{{ end }}