From e3f81bc0433e2d5940689478e74843c85fa90054 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Filip=20Zyba=C5=82a?= <filip.zybala@gmail.com>
Date: Mon, 21 Mar 2022 11:24:32 +0100
Subject: [PATCH] Fix picking default syntax for comments

---
 project/Build.scala                                       | 3 ++-
 .../tools/scaladoc/tasty/comments/CommentSyntaxArgs.scala | 8 ++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/project/Build.scala b/project/Build.scala
index 6099769756ff..752841a67b59 100644
--- a/project/Build.scala
+++ b/project/Build.scala
@@ -1839,7 +1839,8 @@ object ScaladocConfigs {
       .add(DocRootContent(docRootFile.toString))
       .add(CommentSyntax(List(
         s"${dottyLibRoot}=markdown",
-        s"${stdLibRoot}=wiki"
+        s"${stdLibRoot}=wiki",
+        "wiki"
       )))
       .add(VersionsDictionaryUrl("https://scala-lang.org/api/versions.json"))
       .add(DocumentSyntheticTypes(true))
diff --git a/scaladoc/src/dotty/tools/scaladoc/tasty/comments/CommentSyntaxArgs.scala b/scaladoc/src/dotty/tools/scaladoc/tasty/comments/CommentSyntaxArgs.scala
index 65bacba3cd2d..34b489833dd4 100644
--- a/scaladoc/src/dotty/tools/scaladoc/tasty/comments/CommentSyntaxArgs.scala
+++ b/scaladoc/src/dotty/tools/scaladoc/tasty/comments/CommentSyntaxArgs.scala
@@ -17,10 +17,14 @@ object CommentSyntax:
   val default = CommentSyntax.Markdown
 
 case class CommentSyntaxArgs(csFormats: PathBased[CommentSyntax]):
+  val defaultSyntax = csFormats.get(csFormats.projectRoot)
+    .map(_.elem)
+    .getOrElse(CommentSyntax.default)
+
   def get(path: Option[Path]): CommentSyntax =
     path
       .flatMap(p => csFormats.get(p).map(_.elem))
-      .getOrElse(CommentSyntax.default)
+      .getOrElse(defaultSyntax)
 
 object CommentSyntaxArgs:
   val usage =
@@ -52,4 +56,4 @@ object CommentSyntaxArgs:
         )
         CommentSyntaxArgs(res)
     }
-  }
\ No newline at end of file
+  }