HTTP/2 server push

config.toml

@@ -34,14 +34,27 @@ blog = "/:section/:year/:month/:day/:slug/"
 
 # Be explicit about the output formats. We (currently) only want an RSS feed for the home page.
 [outputs]
-home = [ "HTML", "RSS"]
+home = [ "HTML", "RSS", "HEADERS" ]
 page = [ "HTML"]
 section = [ "HTML"]
 
+# Add a "text/netlify" media type for auto-generating the _headers file
+[mediaTypes]
+[mediaTypes."text/netlify"]
+suffix = ""
+delimiter = ""
+
 [outputFormats]
 [outputFormats.RSS]
 baseName = "feed"
 
+# _headers file output (uses the template at layouts/index.headers)
+[outputFormats.HEADERS]
+mediatype = "text/netlify"
+baseName = "_headers"
+isPlainText = true
+notAlternative = true
+
 [params]
 
 time_format_blog = "Monday, January 02, 2006"
@@ -67,6 +80,17 @@ githubbranch = "v1.11.0"
 docsbranch = "release-1.11"
 url = "https://kubernetes.io"
 
+[params.pushAssets]
+css = [
+  "callouts",
+  "styles",
+  "custom-jekyll/tags"
+]
+js = [
+  "custom-jekyll/tags",
+  "script"
+]
+
 [[params.versions]]
 fullversion = "v1.10.3"
 version = "v1.10"
@@ -95,7 +119,6 @@ githubbranch = "v1.7.6"
 docsbranch = "release-1.7"
 url = "https://v1-7.docs.kubernetes.io"
 
-
 # Language definitions.
 
 [languages]
@@ -112,4 +135,3 @@ languageName ="Chinese"
 weight = 2
 contentDir = "content/cn"
 
-

layouts/index.headers

@@ -0,0 +1,38 @@
+{{- $cssFilesFromConfig := .Site.Params.pushAssets.css -}}
+{{- $jsFilesFromConfig := .Site.Params.pushAssets.js -}}
+{{- $pages := .Site.RegularPages -}}
+/*
+  X-Robots-Tag: noindex
+  Link: </images/favicon.png>; rel=preload; as=image
+  {{- range $cssFilesFromConfig -}}
+  {{- $cssUrl := printf "/css/%s.css" . }}
+  Link: <{{ $cssUrl }}>; rel=preload; as=style
+  {{- end -}}
+  {{- range $jsFilesFromConfig -}}
+  {{- $jsUrl := printf "/js/%s.js" . }}
+  Link: <{{ $jsUrl }}>; rel=preload; as=script
+  {{- end -}}
+{{- range $pages }}
+{{- if or (.Params.deprecated) (eq .Params.class "gridPage") (.Params.case_study_styles) (.Params.css) (.Params.js) }}
+{{ .URL }}
+  {{- if .Params.deprecated }}
+  Link: </css/deprecation-warning.css>; rel=preload; as=style
+  {{- end -}}
+  {{- if eq .Params.class "gridPage" }}
+  Link: </css/gridpage.css>; rel=preload; as=style
+  {{- end -}}
+  {{- if .Params.case_study_styles }}
+  Link: </css/case_study_styles.css>; rel=preload; as=style
+  {{- end -}}
+  {{- with .Params.css -}}
+  {{- range (split . ",") }}
+  Link: <{{ trim . " " }}>; rel=preload; as=style
+  {{- end -}}
+  {{- end -}}
+  {{- with .Params.js -}}
+  {{- range (split . ",") }}
+  Link: <{{ trim . " " }}>; rel=preload; as=script
+  {{- end -}}
+  {{- end -}}
+{{- end }}
+{{- end -}}

netlify.toml

@@ -1,7 +1,6 @@
 [build]
-# This default build command adds the robots noindex directive to the site headers
 publish = "public"
-command = "hugo --enableGitInfo && cp netlify_noindex_headers.txt public/_headers"
+command = "hugo"
 
 [context.production.environment]
 HUGO_BASEURL = "https://kubernetes.io/"