Pretty printing Hugo variables for debug

debugprint.css

.debugprint td {
    padding-left: 4px;
    padding-right: 4px;
}
.debugprint .key {
    font-weight: bold;
}
.debugprint .type {
    /* Hide Type columns in debugprint */
    /* display: none; */
    font-size: 0.9em;
    font-family: monospace;
    font-style: italic;
}
.debugprint .value {
    font-family: monospace;
}
.debugprint .true {
    color: green;
}
.debugprint .false {
    color: red;
}
/* Don't touch the table headers */
.debugprint th.key,
.debugprint th.type,
.debugprint th.value {
    font-family: normal;
    font-size: 1em;
    font-style: normal;
}

debugprint.html

<!-- Pretty Print for Debug -->
<!-- https://github.com/kaushalmodi/ox-hugo/blob/master/test/site/themes/bare_min/layouts/partials/debugprint.html -->

<!-- Usage examples:
     {{/* partial "debugprint.html" .Params */}}
     {{/* partial "debugprint.html" .Site */}}
     {{/* partial "debugprint.html" .GitInfo */}}
     {{/* partial "debugprint.html" .Resources */}}
     {{/* partial "debugprint.html" .File */}}
  -->
{{ $value              := . }}
{{ $type               := (printf "%T" $value) }}
{{ $typeIsBool         := (eq "bool" $type) }}
{{ $typeIsNumber       := (or (eq "int" $type) (eq "int64" $type) (eq "float64" $type)) }}
{{ $typeIsString       := (eq "string" $type) }}
{{ $typeIsTime         := (eq "time.Time" $type) }}
{{ $typeIsInterface    := (eq "interface" $type) }}
{{ $typeIsSlice        := (findRE "^([[][]]|.*TaxonomyList|output\\.Formats|resource\\.Resources)" $type) }} <!-- match ^[] -->
{{ $typeIsMap          := (findRE "^(map[[].+[]]|.*SiteSocial)" $type) }} <!-- match ^map[*] -->

{{ $typeIsSiteInfo     := (eq "*hugolib.SiteInfo" $type) }}
{{ $typeIsGitInfo      := (findRE "^.*gitmap\\.GitInfo" $type) }}
{{ $typeIsOutputFormat := (eq "output.Format" $type) }}
{{ $typeIsResource     := (findRE "^\\*resource" $type) }}
{{ $typeIsPage         := (findRE "^\\*hugolib\\.Page" $type) }}
{{ $typeIsFileInfo     := (eq "*hugolib.fileInfo" $type) }}
{{ $typeIsSpecial      := (or $typeIsSiteInfo $typeIsGitInfo $typeIsOutputFormat $typeIsResource $typeIsPage $typeIsFileInfo) }}

{{ if $typeIsBool }}
{{ printf "<span class=\"debugprint\"><span class=\"%#v\">%#v</span></span>" $value $value | safeHTML }}
{{ else if (or $typeIsNumber $typeIsString) }}
<!-- Use %#v for strings so that their values always get double-quoted.
     That is helpful to tell if a space char is within a string. -->
{{ printf "%#v" $value | safeHTML }}
{{ else if (or $typeIsTime $typeIsInterface) }}
{{ printf "%s" $value | safeHTML }}
{{ else if $typeIsSlice }}
{{ range $value }}
{{ partial "debugprint.html" . }} <!-- Recursive call FTW! -->
{{ end }}
{{ else if $typeIsMap }}
{{ if (gt (len $value) 0) }}
<table class="debugprint">
  <tr><th class="key">Key</th><th class="type">Type</th><th class="value">Value</th></tr>
  {{ range $key1, $value1 := $value }}
  {{ $type1       := (printf "%T" $value1) }}
  {{ $type1IsTime := (eq "time.Time" $type1) }}
  {{ if $type1IsTime }}
  <!-- Print the date only if it is not at its initial value of Jan 1, 0001 -->
  {{ if (ne "0001-01-01" ($value1.Format "2006-01-02")) }}
  {{ printf "<tr><td class=\"key\">%s</td><td class=\"type\">%s</td><td class=\"value\">" $key1 $type1 | safeHTML }}
      {{ partial "debugprint.html" $value1 }} <!-- Recursive call FTW! -->
      {{ printf "</td></tr>" | safeHTML }}
  {{ end }}
  {{ else }}
  {{ printf "<tr><td class=\"key\">%s</td><td class=\"type\">%s</td><td class=\"value\">" $key1 $type1 | safeHTML }}
      {{ partial "debugprint.html" $value1 }} <!-- Recursive call FTW! -->
      {{ printf "</td></tr>" | safeHTML }}
  {{ end }}
  {{ end }}
</table>
{{ end }}
{{ else if $typeIsSpecial }}
<div class="debugprint">
  {{ if $typeIsSiteInfo }}
  {{ $siteVarNames   := (slice "Title" "Author" "Social" "LastChange" "DisqusShortname" "GoogleAnalytics" "Copyright" "RSSLink" "LanguageCode" "BuildDrafts" "Params") }}
  {{ $siteVarSymbols := (slice .Title  .Author  .Social  .LastChange  .DisqusShortname  .GoogleAnalytics  .Copyright  .RSSLink  .LanguageCode  .BuildDrafts  .Params ) }}
  <table>
    <tr><th class="key">SiteInfo Variable</th><th class="value">Value</th></tr>
    {{ range $idx, $elem := $siteVarNames }}
    {{ printf "<tr><td class=\"key\">%s</td><td class=\"value\">" $elem | safeHTML }}
        {{ partial "debugprint.html" (index $siteVarSymbols $idx) }} <!-- Recursive call FTW! -->
        {{ printf "</td></tr>" | safeHTML }}
    {{ end }}
  </table>
  {{ else if $typeIsGitInfo }}
  {{ $gitInfoVarNames   := (slice "Hash" "AbbreviatedHash" "Subject" "AuthorName" "AuthorEmail" "AuthorDate") }}
  {{ $gitInfoVarSymbols := (slice .Hash  .AbbreviatedHash  .Subject  .AuthorName  .AuthorEmail  .AuthorDate ) }}
  <table>
    <tr><th class="key">GitInfo Variable</th><th class="value">Value</th></tr>
    {{ range $idx, $elem := $gitInfoVarNames }}
    {{ printf "<tr><td class=\"key\">%s</td><td class=\"value\">" $elem | safeHTML }}
        {{ partial "debugprint.html" (index $gitInfoVarSymbols $idx) }} <!-- Recursive call FTW! -->
        {{ printf "</td></tr>" | safeHTML }}
    {{ end }}
  </table>
  {{ else if $typeIsOutputFormat }}
  {{ $OutputFormatVarNames   := (slice "Name" "MediaType" "Path" "BaseName" "Rel" "Protocol" "IsPlainText" "IsHTML" "NoUgly" "NotAlternative") }}
  {{ $OutputFormatVarSymbols := (slice .Name  .MediaType  .Path  .BaseName  .Rel  .Protocol  .IsPlainText  .IsHTML  .NoUgly  .NotAlternative ) }}
  <table>
    <tr><th class="key">OutputFormat Variable</th><th class="value">Value</th></tr>
    {{ range $idx, $elem := $OutputFormatVarNames }}
    {{ printf "<tr><td class=\"key\">%s</td><td class=\"value\">" $elem | safeHTML }}
        {{ partial "debugprint.html" (index $OutputFormatVarSymbols $idx) }} <!-- Recursive call FTW! -->
        {{ printf "</td></tr>" | safeHTML }}
    {{ end }}
  </table>
  {{ else if $typeIsResource }}
  {{ $ResourceVarNames   := (slice "ResourceType" "Permalink" "RelPermalink" "AbsSourceFilename" "Name" "Title" "Params") }}
  {{ $ResourceVarSymbols := (slice .ResourceType  .Permalink  .RelPermalink  .AbsSourceFilename  .Name  .Title  .Params ) }}
  <table>
    <tr><th class="key">Resource Variable</th><th class="value">Value</th></tr>
    {{ range $idx, $elem := $ResourceVarNames }}
    {{ printf "<tr><td class=\"key\">%s</td><td class=\"value\">" $elem | safeHTML }}
        {{ partial "debugprint.html" (index $ResourceVarSymbols $idx) }} <!-- Recursive call FTW! -->
        {{ printf "</td></tr>" | safeHTML }}
    {{ end }}
  </table>
  <hr>
  {{ else if $typeIsPage }}
  {{ $PageVarNames   := (slice "ResourceType" "Kind" "Draft" "Layout" "Permalink" "RelPermalink" "Name" "Title" "Params") }}
  {{ $PageVarSymbols := (slice .ResourceType  .Kind  .Draft  .Layout  .Permalink  .RelPermalink  .Name  .Title  .Params ) }}
  <table>
    <tr><th class="key">Page Variable</th><th class="value">Value</th></tr>
    {{ range $idx, $elem := $PageVarNames }}
    {{ printf "<tr><td class=\"key\">%s</td><td class=\"value\">" $elem | safeHTML }}
        {{ partial "debugprint.html" (index $PageVarSymbols $idx) }} <!-- Recursive call FTW! -->
        {{ printf "</td></tr>" | safeHTML }}
    {{ end }}
  </table>
  <hr>
  {{ else if $typeIsFileInfo }}
  {{ $FileInfoVarNames   := (slice "UniqueID" "BaseFileName" "TranslationBaseName" "Lang" "Section" "LogicalName" "Dir" "Ext" "Path") }}
  {{ $FileInfoVarSymbols := (slice .UniqueID  .BaseFileName  .TranslationBaseName  .Lang  .Section  .LogicalName  .Dir  .Ext  .Path ) }}
  <table>
    <tr><th class="key">FileInfo Variable</th><th class="value">Value</th></tr>
    {{ range $idx, $elem := $FileInfoVarNames }}
    {{ printf "<tr><td class=\"key\">%s</td><td class=\"value\">" $elem | safeHTML }}
        {{ partial "debugprint.html" (index $FileInfoVarSymbols $idx) }} <!-- Recursive call FTW! -->
        {{ printf "</td></tr>" | safeHTML }}
    {{ end }}
  </table>
  {{ else }}
  {{ printf "%#v" $value | safeHTML }}
  {{ end }}
</div>
{{ else }}
{{ printf "%#v (<i>type:%s</i>)" $value $type | safeHTML }}
{{ end }}

<!-- Older, simpler version -->
<!-- <table class="debugprint"> -->
  {{/* range $key1, $value1 := . */}}
  {{/* printf "<tr><td>%#v</td><td>%#v</td></tr>" $key1 $value1 | safeHTML */}}
  {{/* end */}}
  <!-- </table> -->