Support PostProcess for other than HTML

[rockerBOO]

What version of Hugo are you using (hugo version)?

$ hugo version
hugo v0.102.3+extended linux/amd64 BuildDate=unknown

Does this issue reproduce with the latest release?

Yes

I'm trying to export a json list which includes minified hashed file paths and integrity. Thanks to some help from the discourse I have the following.

{{- $cssFiles := slice "fonts/kalam/stylesheet.css" "fonts/plex/font.css" "css/main2.css" "css/main-nav-bar.css" -}}
{{- $exported := slice -}}
{{- range $cssFiles -}} 
	{{- $css := resources.Get . -}}
	{{- $css = $css | resources.PostCSS -}}
	{{- if hugo.IsProduction -}}
		{{- $css = $css | minify | fingerprint "sha384"| resources.PostProcess  -}}
	{{- end -}}

	{{- $m := dict
			"file" .
			"target" $css.RelPermalink
			"mediaType" "text/css"
			"integrity" $css.Data.Integrity
	-}}
        {{- $exported = $exported | append $m -}}

	<link
		rel="stylesheet"
		href="{{ $css.Permalink }}"
		integrity="{{ $css.Data.Integrity }}"
	/>
{{- end -}}

{{- (jsonify (dict "indent" "  ") $exported | resources.FromString "export/stylesheet.json.html").Publish -}}

The issue is I want a .json file exported but if I do export/stylesheet.json in the last part it gets exported as the following.

[
  {
    "file": "fonts/kalam/stylesheet.css",
    "integrity": "__h_pp_l1_1_Data.Integrity__e=",
    "mediaType": "text/css",
    "target": "__h_pp_l1_1_RelPermalink__e="
  },
  {
    "file": "fonts/plex/font.css",
    "integrity": "__h_pp_l1_2_Data.Integrity__e=",
    "mediaType": "text/css",
    "target": "__h_pp_l1_2_RelPermalink__e="
  },
  {
    "file": "css/main2.css",
    "integrity": "__h_pp_l1_3_Data.Integrity__e=",
    "mediaType": "text/css",
    "target": "__h_pp_l1_3_RelPermalink__e="
  },
  {
    "file": "css/main-nav-bar.css",
    "integrity": "__h_pp_l1_4_Data.Integrity__e=",
    "mediaType": "text/css",
    "target": "__h_pp_l1_4_RelPermalink__e="
  }
]

Putting it as export/stylesheet.json.html exports it like

[
  {
    "file": "fonts/kalam/stylesheet.css",
    "integrity": "sha384-heMu9jHo5hB1ouw+RXbp8qkdluBNx6pMPK7Jpgkd9zKcxHcZqoP1Ouh+fP/k4W8q",
    "mediaType": "text/css",
    "target": "/fonts/kalam/stylesheet.min.85e32ef631e8e61075a2ec3e4576e9f2a91d96e04dc7aa4c3caec9a6091df7329cc47719aa83f53ae87e7cffe4e16f2a.css"
  },
  {
    "file": "fonts/plex/font.css",
    "integrity": "sha384-Q9Y7k8u6w97eFtjK6q5zuQ5F9sw6fCGpsj2POuacWoBdDgMHTSKcot98QRqN50cf",
    "mediaType": "text/css",
    "target": "/fonts/plex/font.min.43d63b93cbbac3dede16d8caeaae73b90e45f6cc3a7c21a9b23d8f3ae69c5a805d0e03074d229ca2df7c411a8de7471f.css"
  },
  {
    "file": "css/main2.css",
    "integrity": "sha384-FSCthKNDMOyBvZXMJ3GBgYRGhN0jf5NjWsF3knZKxtKYx5HJtTqYy5uONpokomnU",
    "mediaType": "text/css",
    "target": "/css/main2.min.1520ad84a34330ec81bd95cc27718181844684dd237f93635ac17792764ac6d298c791c9b53a98cb9b8e369a24a269d4.css"
  },
  {
    "file": "css/main-nav-bar.css",
    "integrity": "sha384-NsBVxX8l5JHeeK30przJ835+wvUGrateSt88mozwujjBcDABfkstnhhzZpumtUYZ",
    "mediaType": "text/css",
    "target": "/css/main-nav-bar.min.36c055c57f25e491de78adf4a6bcc9f37e7ec2f506adab5e4adf3c9a8cf0ba38c17030017e4b2d9e1873669ba6b54619.css"
  }
]

Same thing happens for export/stylesheet.json.json

Expectation

I'd expect publishing as export/stylesheet.json would export the values and not a "placeholder" variables.

---

Thank you

[bep]

Hey, I was about to say that this isn't fixable, but I guess it is. I suspect we have a hardcoded thing where we only consider HTML output format in the replacement step.

This i a reminder that we have issue #8086 -- which would make all of this much nicer.

[github-actions]

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