{{- $noindex := .Params.noindex | default false -}}
{{ if and (hugo.IsProduction) (not $noindex) -}}
{{ else -}}
{{ end -}}
{{ partialCached "favicons.html" . -}}
{{- if .IsHome -}}
{{ .Site.Title -}}
{{ else -}}
{{ with .Title }}{{ . }} – {{ end -}}
{{ .Site.Title -}}
{{ end -}}
{{- with .Params.canonical -}}
{{- else -}}
{{- end -}}
{{- partial "opengraph.html" . -}}
{{- template "_internal/schema.html" . -}}
{{- template "_internal/twitter_cards.html" . -}}
{{- partialCached "head-css.html" . -}}
{{- if and (eq hugo.Environment "production") .Site.Config.Services.GoogleAnalytics.ID }}
{{ partial "google-analytics.html" . }}
{{- end }}
{{ $noop := .WordCount -}}
{{ if .Page.Store.Get "hasMath" -}}
{{ $katexBaseUrl := "https://cdn.jsdelivr.net/npm/katex@latest/dist" }}
{{ $katexCssUrl := printf "%s/katex%s.css" $katexBaseUrl (cond hugo.IsProduction ".min" "") -}}
{{ $katexFontPattern := "url(fonts/" }}
{{ $katexFontSubstituted := printf "url(%s/fonts/" $katexBaseUrl }}
{{ with try (resources.GetRemote $katexCssUrl) -}}
{{ with .Err -}}
{{ errorf "Could not retrieve KaTeX css file from %s. Reason: %s." $katexCssUrl . -}}
{{ else with.Value -}}
{{ $katexCssContent := strings.Replace .Content $katexFontPattern $katexFontSubstituted }}
{{ with resources.FromString (printf "css/katex%s.css" (cond hugo.IsProduction ".min" "")) $katexCssContent -}}
{{ end -}}
{{ end -}}
{{ end -}}
{{ end -}}
{{ partial "custom/head-end.html" . -}}