Fix QtCreator symlinks in include completion.

completion-symlinks.patch

From f52618b086f02a87ccaed124c00a2767a3bfbef1 Mon Sep 17 00:00:00 2001
From: DanielChabrowski <dantezstudio@gmail.com>
Date: Wed, 3 Jul 2019 01:56:49 +0200
Subject: [PATCH] CppTools: Follow symlinks for include completion

---
 .../clangcodemodel/clangcompletionassistprocessor.cpp    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp b/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
index 6f1397c487..c14277e8f1 100644
--- a/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
+++ b/src/plugins/clangcodemodel/clangcompletionassistprocessor.cpp
@@ -476,6 +476,7 @@ bool ClangCompletionAssistProcessor::completeInclude(const QTextCursor &cursor)
     const ::Utils::MimeType mimeType = ::Utils::mimeTypeForName("text/x-c++hdr");
     const QStringList suffixes = mimeType.suffixes();
 
+    QStringList uniqueHeaderPaths;
     foreach (const ProjectExplorer::HeaderPath &headerPath, headerPaths) {
         QString realPath = headerPath.path;
         if (!directoryPrefix.isEmpty()) {
@@ -484,6 +485,14 @@ bool ClangCompletionAssistProcessor::completeInclude(const QTextCursor &cursor)
             if (headerPath.type == ProjectExplorer::HeaderPathType::Framework)
                 realPath += QLatin1String(".framework/Headers");
         }
+
+        realPath = QDir{realPath}.canonicalPath();
+        if (!realPath.isEmpty() && !uniqueHeaderPaths.contains(realPath)) {
+            uniqueHeaderPaths.append(std::move(realPath));
+        }
+    }
+
+    foreach (const QString& realPath, uniqueHeaderPaths) {
         completeIncludePath(realPath, suffixes);
     }
 
-- 
2.20.1