From 6fce04b97acdd68a245b5009a2a507d29ae7d62b Mon Sep 17 00:00:00 2001
From: Gusted <williamzijl7@hotmail.com>
Date: Tue, 9 Aug 2022 04:23:18 +0200
Subject: [PATCH] Don't open new page for ext wiki on same repository

- When the external wiki has been set to a file on the repository, don't
open the page on a tab.
- Resolves #20657
---
 modules/templates/helper.go | 1 +
 templates/repo/header.tmpl  | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index 8a15cec2c68a0..9eac4ff916ea6 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -453,6 +453,7 @@ func NewFuncMap() []template.FuncMap {
 			}
 			return items
 		},
+		"HasPrefix": strings.HasPrefix,
 	}}
 }
 
diff --git a/templates/repo/header.tmpl b/templates/repo/header.tmpl
index fa0fb7981358e..e78e2e7b4fe4b 100644
--- a/templates/repo/header.tmpl
+++ b/templates/repo/header.tmpl
@@ -206,7 +206,7 @@
 				{{end}}
 
 				{{if or (.Permission.CanRead $.UnitTypeWiki) (.Permission.CanRead $.UnitTypeExternalWiki)}}
-					<a class="{{if .PageIsWiki}}active{{end}} item" href="{{.RepoLink}}/wiki" {{if (.Permission.CanRead $.UnitTypeExternalWiki)}} target="_blank" rel="noopener noreferrer" {{end}}>
+					<a class="{{if .PageIsWiki}}active{{end}} item" href="{{.RepoLink}}/wiki" {{if and (.Permission.CanRead $.UnitTypeExternalWiki) (not (HasPrefix ((.Repository.MustGetUnit $.UnitTypeExternalWiki).ExternalWikiConfig.ExternalWikiURL) (.Repository.HTMLURL)))}} target="_blank" rel="noopener noreferrer" {{end}}>
 						{{svg "octicon-book"}} {{.locale.Tr "repo.wiki"}}
 					</a>
 				{{end}}