Hugo-theme-stack/layouts/partials/head/opengraph.html

<meta property='og:title' content='{{ partial "data/title" . }}'>
<meta property='og:description' content='{{ chomp (partial "data/description" . | plainify ) }}'>
<meta property='og:url' content='{{ .Permalink }}'>
<meta property='og:site_name' content='{{ .Site.Title }}'>
<meta property='og:type' content='
	{{- if .IsPage -}}
		article
  	{{- else -}}
		website
  	{{- end -}}
'>

{{ with .Site.Params.opengraph.twitter.site }}
<meta name="twitter:site" content="{{ . }}">
{{ end }}
<meta name="twitter:title" content="{{ partial "data/title" . }}">
<meta name="twitter:description" content="{{ chomp (partial "data/description" . | plainify ) }}">

{{- with .Params.locale -}}
  	<meta property='og:locale' content='{{ . }}'>
{{- end -}}

{{- if .IsPage -}}
  	<meta property='article:section' content='{{ .Section | title }}' />
	{{- range .Params.tags -}}
		<meta property='article:tag' content='{{ . }}' />
	{{- end -}}
{{- end -}}

{{- if .IsPage -}}
	{{- if not .Date.IsZero -}}
		<meta property='article:published_time' content='{{ .Date.Format "2006-01-02T15:04:05-07:00" | safeHTML }}'/>
	{{- end -}}
	{{- if not .Lastmod.IsZero -}}
		<meta property='article:modified_time' content='{{ .Lastmod.Format "2006-01-02T15:04:05-07:00" | safeHTML }}'/>
	{{- end -}}
{{- else -}}
	{{- if not .Site.LastChange.IsZero -}}
		<meta property='og:updated_time' content='{{ .Site.LastChange.Format " 2006-01-02T15:04:05-07:00 " | safeHTML }}'/>
	{{- end -}}
{{- end -}}

{{ $image := partial "helper/image" . }}
{{- if $image.exists -}}
	{{ $imagePermalink := $image.src }}
	{{ if $image.local }}
		{{ $imagePermalink = absURL $image.src.RelPermalink }}
	{{ end }}
	<meta name="twitter:card" content="summary_large_image">
	<meta property='og:image' content='{{ $imagePermalink }}' />
	<meta name="twitter:image" content='{{ $imagePermalink }}' />
{{- else if .Site.Params.opengraph.defaultImage -}}
	{{ $image := resources.Get .Site.Params.opengraph.defaultImage }}
	<meta property='og:image' content='{{ absURL $image.RelPermalink }}' />
	<meta name="twitter:image" content='{{ absURL $image.RelPermalink }}' />
{{- end -}}