static/frontend/unit: add canonical href link
To prevent search engines from indexing duplicate unit pages
and different minor or patch versions, we provide a canonical
URL for all unit main pages.
Change-Id: Ida6f40f11b3c860dffad9a6fc843d58ac56d5693
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/341864
Trust: Jamal Carvalho <jamal@golang.org>
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Julie Qiu <julie@golang.org>
diff --git a/static/frontend/frontend.tmpl b/static/frontend/frontend.tmpl
index d93e6f9..4fcf25e 100644
--- a/static/frontend/frontend.tmpl
+++ b/static/frontend/frontend.tmpl
@@ -27,6 +27,7 @@
{{end}}
<meta class="js-gtmID" data-gtmid="{{.GoogleTagManagerID}}">
<link rel="shortcut icon" href="/static/shared/icon/favicon.ico">
+ {{block "canonical" .}}{{end}}
<!-- Only load the css reset for non-legacy pages -->
{{if not .UseSiteWrapper}}
<link href="/static/shared/reset.css?version={{.AppVersionLabel}}" rel="stylesheet">
diff --git a/static/frontend/unit/main/main.tmpl b/static/frontend/unit/main/main.tmpl
index f0e697c..00924b7 100644
--- a/static/frontend/unit/main/main.tmpl
+++ b/static/frontend/unit/main/main.tmpl
@@ -4,6 +4,10 @@
license that can be found in the LICENSE file.
-->
+{{define "canonical"}}
+ <link rel="canonical" href="https://pkg.go.dev/{{.Unit.Path}}">
+{{end}}
+
{{define "main-styles"}}
<link href="/static/frontend/unit/main/main.css?version={{.AppVersionLabel}}" rel="stylesheet">
{{end}}
