From 104c1f3757b0dc60b3dd2cd3ee9fe4dc09f05557 Mon Sep 17 00:00:00 2001
From: Daniel Teske <daniel.teske@digia.com>
Date: Mon, 14 Jan 2013 15:31:49 +0100
Subject: [PATCH] Only show Visual Studio compilers if VS is installed

Task-number: QTCREATORBUG-8487

Change-Id: Ibc812f14cd8e4de765cabf27d23451c06611d372
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
---
 src/plugins/projectexplorer/msvctoolchain.cpp | 15 +++++++++++++++
 src/plugins/projectexplorer/msvctoolchain.h   |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/src/plugins/projectexplorer/msvctoolchain.cpp b/src/plugins/projectexplorer/msvctoolchain.cpp
index a47d1039e05..00aa65d994f 100644
--- a/src/plugins/projectexplorer/msvctoolchain.cpp
+++ b/src/plugins/projectexplorer/msvctoolchain.cpp
@@ -440,6 +440,19 @@ QString MsvcToolChainFactory::id() const
     return QLatin1String(Constants::MSVC_TOOLCHAIN_ID);
 }
 
+bool MsvcToolChainFactory::checkForVisualStudioInstallation(const QString &vsName)
+{
+    const QSettings vsRegistry(
+#ifdef Q_OS_WIN64
+                QLatin1String("HKEY_LOCAL_MACHINE\\SOFTWARE\\Wow6432Node\\Microsoft\\VisualStudio\\SxS\\VS7"),
+#else
+                QLatin1String("HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\VisualStudio\\SxS\\VS7"),
+#endif
+                QSettings::NativeFormat);
+
+    return vsRegistry.contains(vsName);
+}
+
 QList<ToolChain *> MsvcToolChainFactory::autoDetect()
 {
     QList<ToolChain *> results;
@@ -501,6 +514,8 @@ QList<ToolChain *> MsvcToolChainFactory::autoDetect()
         const int dotPos = vsName.indexOf(QLatin1Char('.'));
         if (dotPos == -1)
             continue;
+        if (!checkForVisualStudioInstallation(vsName))
+            continue;
 
         const QString path = vsRegistry.value(vsName).toString();
         const int version = vsName.left(dotPos).toInt();
diff --git a/src/plugins/projectexplorer/msvctoolchain.h b/src/plugins/projectexplorer/msvctoolchain.h
index 8afbf6ebb72..21a0582aaa1 100644
--- a/src/plugins/projectexplorer/msvctoolchain.h
+++ b/src/plugins/projectexplorer/msvctoolchain.h
@@ -106,6 +106,8 @@ public:
         { return MsvcToolChain::readFromMap(data); }
 
     ToolChainConfigWidget *configurationWidget(ToolChain *);
+private:
+    static bool checkForVisualStudioInstallation(const QString &vsName);
 };
 
 // --------------------------------------------------------------------------