hugo-theme-relearn/layouts/partials/get-theme-variants.hugo

{{- $page := . }}
{{- $autores := resources.Get "css/auto.css" }}
{{- $printres := resources.Get "css/format-print.css" }}

{{- /*
First run:
- convert from old forms to slice of dicts
- convert auto property to slice
- add name property
*/}}
{{- $tempthemevariants := slice | append (.Site.Params.themeVariant | default "auto" ) }}
{{- $themevariants := slice }}
{{- range $tempthemevariant := $tempthemevariants }}
  {{- $themevariant := $tempthemevariant }}
  {{- if not (reflect.IsMap $themevariant) }}
    {{- $themevariant = dict "identifier" $tempthemevariant }}
  {{- end }}
  {{- if not $themevariant.name }}
    {{- $themevariant = collections.Merge $themevariant (dict "name" ($themevariant.identifier | humanize | strings.Title)) }}
  {{- end }}
  {{- if eq $themevariant.identifier "auto" }}
    {{- $themevariant = collections.Merge $themevariant (dict "auto" ($themevariant.auto | default slice)) }}
  {{- end }}
  {{- $themevariants = $themevariants | append $themevariant }}
{{- end }}

{{- /*
Second run, handle non-auto variants
- fix and regenerate theme css for advanced config mode
- add chroma property from stylesheet
*/}}
{{- $tempthemevariants = $themevariants }}
{{- $themevariants = slice }}
{{- range $tempthemevariant := $tempthemevariants }}
  {{- $themevariant := $tempthemevariant }}
  {{- if not (collections.IsSet $themevariant "auto") }}
    {{- $themecontent := "" }}
    {{- with resources.Get (printf "css/theme-%s.css" $themevariant.identifier) }}
      {{- $themecontent = .Content}}
    {{- else }}
      {{- $themecontent = readFile (printf "static/css/theme-%s.css" $themevariant.identifier) }}
    {{- end }}
    {{- $chroma := "" }}
    {{- range findRESubmatch `[ \t]*--CODE-theme\s*:\s*([^;]*?)\s*;` $themecontent 1 }}
      {{- $chroma = index . 1 }}
    {{- else }}
      {{- range findRESubmatch `[ \t]*@import\s+[^$]*?chroma-([^.]*?)\.css` $themecontent 1 }}
        {{- $chroma = index . 1 }}
        {{- warnf "\"theme-%s.css\": DEPRECATED use of @import for chroma stylesheet, instead use '--CODE-theme: %s;'" $themevariant.identifier $chroma }}
        {{- $themecontent = replaceRE `[ \t]*@import\s+[^$]*?chroma-[^.]*?\.css.*?\n` "" $themecontent }}
      {{- else }}
        {{- $chroma = "relearn-light" }}
      {{- end }}
      {{- $themecontent = replaceRE `(:root\s*\{[ \t]*)(\s*)` (printf "${1}${2}--CODE-theme: %s;${2}" $chroma) $themecontent }}
    {{- end }}
    {{- $themevariant = collections.Merge $themevariant (dict "chroma" $chroma) }}
    {{- $cssres := $themecontent | resources.FromString (printf "css/theme-%s.css" $themevariant.identifier) }}
    {{- /* the following code causes Hugo to generate our css file - although it is in comments */}}<!-- {{ $cssres.RelPermalink }} -->
  {{- end }}
  {{- $themevariants = $themevariants | append $themevariant }}
{{- end }}

{{- /*
Third run, handle auto variants
- fill up auto property
- fill up chroma property
- generate theme and chroma css files from template
*/}}
{{- $tempthemevariants = $themevariants }}
{{- $themevariants = slice }}
{{- range $tempthemevariant := $tempthemevariants }}
  {{- $themevariant := $tempthemevariant }}
  {{- if collections.IsSet $themevariant "auto" }}
    {{- $i := 0 }}
    {{- if eq (int (len $themevariant.auto)) 0 }}
      {{- range $tempthemevariants }}
        {{- $i = add $i 1 }}
        {{- if not (collections.IsSet . "auto") }}
          {{- $themevariant = collections.Merge $themevariant (dict "auto" ($themevariant.auto | append .identifier)) }}
          {{- break }}
        {{- end }}
      {{- end }}
    {{- end }}
    {{- if eq (int (len $themevariant.auto)) 0 }}
      {{- $themevariant = collections.Merge $themevariant (dict "auto" ($themevariant.auto | append "relearn-light")) }}
    {{- end }}
    {{- if eq (int (len $themevariant.auto)) 1 }}
      {{- $poppedthemevariants := last (sub (len $tempthemevariants) $i) $tempthemevariants }}
      {{- range $poppedthemevariants }}
        {{- if not (collections.IsSet . "auto") }}
          {{- $themevariant = collections.Merge $themevariant (dict "auto" ($themevariant.auto | append .identifier)) }}
          {{- break }}
        {{- end }}
      {{- end }}
    {{- end }}
    {{- if eq (int (len $themevariant.auto)) 1 }}
      {{- $themevariant = collections.Merge $themevariant (dict "auto" ($themevariant.auto | append "relearn-dark")) }}
    {{- end }}
    {{- $themevariant = collections.Merge $themevariant (dict "auto" ($themevariant.auto | first 2)) }}
    {{- $light := index $themevariant.auto 0 }};
    {{- $dark := index $themevariant.auto 1 }};
    {{- $cssres := $autores | resources.ExecuteAsTemplate (printf "css/theme-%s.css" $themevariant.identifier) (dict "prefix" "theme" "light" $light "dark" $dark) }}
    {{- /* the following code causes Hugo to generate our css file - although it is in comments */}}<!-- {{ $cssres.RelPermalink }} -->
    {{- $themevariant = collections.Merge $themevariant (dict "chroma" $themevariant.identifier) }}
    {{- $light = (index (collections.Where $tempthemevariants "identifier" $light) 0).chroma }}
    {{- $dark = (index (collections.Where $tempthemevariants "identifier" $dark) 0).chroma }}
    {{- $cssres = $autores | resources.ExecuteAsTemplate (printf "css/chroma-%s.css" $themevariant.chroma) (dict "prefix" "chroma" "light" $light "dark" $dark) }}
    {{- /* the following code causes Hugo to generate our css file - although it is in comments */}}<!-- {{ $cssres.RelPermalink }} -->
  {{- end }}
  {{- $themevariants = $themevariants | append $themevariant }}
{{- end }}

{{- $cssres := $printres | resources.ExecuteAsTemplate "css/format-print.css" (index (collections.Where $themevariants "identifier" "relearn-light") 0) }}
{{- /* the following code causes Hugo to generate our css file - although it is in comments */}}<!-- {{ $cssres.RelPermalink }} -->

{{- return $themevariants }}