Try relative and absolute path in PathBased

Author: pikinier20

project/Build.scala

@@ -1416,7 +1416,7 @@ object Build {
             .add(ProjectVersion("3.1.2")) // TODO: Change that later to the current version tag. (This must happen on first forward this branch to stable release tag)
             .remove[VersionsDictionaryUrl]
             .add(SourceLinks(List(
-              dottySrcLink(referenceVersion, temp.getAbsolutePath + "=")
+              dottySrcLink("language-reference-stable", temp.getAbsolutePath + "=")
             )))
             .withTargets(List("___fake___.scala"))
         }

scaladoc/src/dotty/tools/scaladoc/PathBased.scala

@@ -4,10 +4,12 @@ import java.nio.file.{Path, Paths}
 
 case class PathBased[T](entries: List[PathBased.Entry[T]], projectRoot: Path):
   def get(path: Path): Option[PathBased.Result[T]] =
-    if path.isAbsolute && path.startsWith(projectRoot) then get(projectRoot.relativize(path))
-    else entries.filter(_.path.forall(p => path.startsWith(p))).maxByOption(_.path.map(_.toString.length)).map(entry =>
-      PathBased.Result(entry.path.fold(path)(_.relativize(path)), entry.elem)
-    )
+    val paths = Option.when(path.isAbsolute && path.startsWith(projectRoot))(projectRoot.relativize(path)).toSeq :+ path
+    paths.iterator.to(LazyList).flatMap { path =>
+      entries.filter(_.path.forall(p => path.startsWith(p))).maxByOption(_.path.map(_.toString.length)).map(entry =>
+        PathBased.Result(entry.path.fold(path)(_.relativize(path)), entry.elem)
+      )
+    }.headOption
 
 trait ArgParser[T]:
   def parse(s: String): Either[String, T]

scaladoc/src/dotty/tools/scaladoc/site/LoadedTemplate.scala

@@ -43,9 +43,7 @@ case class LoadedTemplate(
     def getMap(key: String) = templateFile.settings.getOrElse(key, Map.empty).asInstanceOf[Map[String, Object]]
 
     val sourceLinks = if !templateFile.file.exists() then Nil else
-      // TODO (https://github.com/lampepfl/scala3doc/issues/240): configure source root
-      // toRealPath is used to turn symlinks into proper paths
-      val actualPath = Paths.get("").toAbsolutePath.relativize(templateFile.file.toPath.toRealPath())
+      val actualPath = templateFile.file.toPath
       ctx.sourceLinks.pathTo(actualPath).map("viewSource" -> _ ) ++
         ctx.sourceLinks.pathTo(actualPath, operation = "edit").map("editSource" -> _)