add meta robots tag to deploy previews to make extra sure they aren't indexed

layouts/partials/head/_head.html

@@ -1,4 +1,4 @@
-{{ partial "head/init" . -}}
+{{ partial "functions/init" . -}}
 {{ partial "head/meta" . -}}
 {{ partial "head/open-graph" . -}}
 {{ partialCached "head/mobile" . -}}

layouts/partials/head/init.html

@@ -1,39 +0,0 @@
-{{/* Strip any markdown styling from page title for use in meta tags */}}
-{{- with .Title -}}
-  {{- $.Scratch.Set "plainTitle" (. | markdownify | htmlUnescape | plainify) -}}
-{{- end -}}
-
-{{/* If this is a page/post, link View Source to specific file on GitHub; otherwise, just link to repo homepage */}}
-{{- with .Site.Params.social.githubRepo }}
-  {{- $githubURL := printf "https://github.com/%s" . }}
-  {{- if not $.IsPage }}
-    {{- $.Scratch.Set "sourceURL" $githubURL }}
-  {{- else }}
-    {{- $.Scratch.Set "sourceURL" (printf "%s/blob/main/content/%s" $githubURL $.File.Path) }}
-  {{- end }}
-{{- end }}
-
-{{/* Chooses and initializes various images for use by JSON schema & open graph tags */}}
-{{/* Author image (default) */}}
-{{- with .Site.Author.image -}}
-  {{- with resources.Get . -}}
-    {{- $.Scratch.Set "authorImage" . -}}
-  {{- end -}}
-{{- end -}}
-{{/* Page image (via frontmatter) */}}
-{{- with .Params.image -}}
-  {{- with $.Page.Resources.GetMatch . -}}
-    {{- $.Scratch.Set "pageImage" . -}}
-  {{- end -}}
-{{- else -}}
-  {{/* Fallback to author image set above */}}
-  {{- with $.Scratch.Get "authorImage" -}}
-    {{- $.Scratch.Set "pageImage" . -}}
-  {{- end -}}
-{{- end -}}
-{{/* Site logo */}}
-{{- with .Site.Params.image -}}
-  {{- with resources.Get . -}}
-    {{- $.Scratch.Set "logoImage" . -}}
-  {{- end -}}
-{{- end -}}

layouts/partials/head/meta.html

@@ -1,5 +1,6 @@
 <meta charset="utf-8">
 {{ hugo.Generator }}
+{{ if ne hugo.Environment "production" }}<meta name="robots" content="noindex, nofollow">{{ end }}
 <title>{{ .Scratch.Get "plainTitle" }}{{ if not .IsHome }} – {{ .Site.Title }}{{ end }}</title>
 <meta name="description" content="{{ with .Description }}{{ . }}{{ else }}{{ .Site.Params.description }}{{ end }}">
 {{ with .Site.Author.name }}<meta name="author" content="{{ . }}">{{ end }}