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{{- if .Page.Site.Params.BookPortableLinks -}}
{{- template "portable-link" . -}}
{{- else -}}
<a href="{{ .Destination | safeURL }}"{{ with .Title}} title="{{ . }}"{{ end }}>{{ .Text | safeHTML }}</a>
{{- end -}}
{{- define "portable-link" -}}
{{- $destination := .Destination }}
{{- $isRemote := or (in .Destination ":") (strings.HasPrefix .Destination "//") }}
{{- if not $isRemote }}
{{- $url := urls.Parse .Destination }}
{{- $path := strings.TrimSuffix "/_index.md" $url.Path }}
{{- $path = strings.TrimSuffix "/_index" $path }}
{{- $path = strings.TrimSuffix ".md" $path }}
{{- $page := .Page.GetPage $path }}
{{- if $page }}
{{- $destination = $page.RelPermalink }}
{{- if $url.Fragment }}
{{- $destination = print $destination "#" $url.Fragment }}
{{- end }}
{{- else if fileExists (print .Page.File.Dir .Destination) }}
<!-- Nothing -->
{{- else -}}
{{- warnf "Page '%s' not found in '%s'" .Destination .Page.File }}
{{- end }}
{{- end }}
<a href="{{ $destination | safeURL }}"{{ with .Title}} title="{{ . }}"{{ end }}>{{ .Text | safeHTML }}</a>
{{- end -}}
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