From 034eb5f900043d8b072f17acf183c657803f9b9f Mon Sep 17 00:00:00 2001
From: Miron Aseev <aseev.miron@gmail.com>
Date: Sat, 28 Oct 2017 10:52:37 +0700
Subject: [PATCH] Fix rendering of the CONTRIBUTING page on Github

---
 CONTRIBUTING => CONTRIBUTING.md                     |  0
 .../dottydoc/staticsite/MarkdownLinkVisitor.scala   | 13 ++++++++-----
 docs/docs/contributing/getting-started.md           |  2 +-
 3 files changed, 9 insertions(+), 6 deletions(-)
 rename CONTRIBUTING => CONTRIBUTING.md (100%)

diff --git a/CONTRIBUTING b/CONTRIBUTING.md
similarity index 100%
rename from CONTRIBUTING
rename to CONTRIBUTING.md
diff --git a/doc-tool/src/dotty/tools/dottydoc/staticsite/MarkdownLinkVisitor.scala b/doc-tool/src/dotty/tools/dottydoc/staticsite/MarkdownLinkVisitor.scala
index 5216ee950675..7f0a7b93d55b 100644
--- a/doc-tool/src/dotty/tools/dottydoc/staticsite/MarkdownLinkVisitor.scala
+++ b/doc-tool/src/dotty/tools/dottydoc/staticsite/MarkdownLinkVisitor.scala
@@ -3,18 +3,21 @@ package dottydoc
 package staticsite
 
 import com.vladsch.flexmark.ast._
-import com.vladsch.flexmark.util.sequence.CharSubSequence
-import model.{ Package, NonEntity, Val, Def, TypeAlias }
+import com.vladsch.flexmark.util.sequence.{BasedSequence, CharSubSequence}
+import model.{Def, NonEntity, Package, TypeAlias, Val}
 import dottydoc.util.MemberLookup
 
 object MarkdownLinkVisitor {
   private val EntityLink = """([^\.]+)(\.[^\.]+)*""".r
   def apply(node: Node, docs: Map[String, Package], params: Map[String, AnyRef]): Unit =
-    (new NodeVisitor(
+    new NodeVisitor(
       new VisitHandler(classOf[Link], new Visitor[Link] with MemberLookup {
         override def visit(node: Link): Unit = {
+          def isExternal(url: BasedSequence) =
+            url.startsWith("http") || url.startsWith("https")
+
           val url = node.getUrl
-          if (url.endsWith(".md")) node.setUrl {
+          if (url.endsWith(".md") && !isExternal(url)) node.setUrl {
             url.subSequence(0, url.lastIndexOf('.')).append(".html")
           }
           else if (EntityLink.unapplySeq(url.toString).isDefined) {
@@ -37,6 +40,6 @@ object MarkdownLinkVisitor {
           }
         }
       })
-    ))
+    )
     .visit(node)
 }
diff --git a/docs/docs/contributing/getting-started.md b/docs/docs/contributing/getting-started.md
index 4baf842720aa..90af47214f12 100644
--- a/docs/docs/contributing/getting-started.md
+++ b/docs/docs/contributing/getting-started.md
@@ -75,4 +75,4 @@ $ sbt
 ```
 
 Before contributing to Dotty, we invite you to consult the
-[Dotty Developer Guidelines](https://github.com/lampepfl/dotty/blob/master/CONTRIBUTING).
+[Dotty Developer Guidelines](https://github.com/lampepfl/dotty/blob/master/CONTRIBUTING.md).