implement simple VFS to support caching during project parsing

this tremendously speeds up loading of qt 5.1 based projects (including
qt itself) under mac os, as these look up the sdk dynamically, and use
caching to avoid doing that in every subproject.

Change-Id: I833253f81c3159056fab2ff888f293b36cc2ef56
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

1 files changed, 18 insertions, 1 deletions

diff --git a/src/plugins/qt4projectmanager/qt4project.cpp b/src/plugins/qt4projectmanager/qt4project.cpp
index b2efd28323..aa81184031 100644
--- a/src/plugins/qt4projectmanager/qt4project.cpp
+++ b/src/plugins/qt4projectmanager/qt4project.cpp
@@ -46,6 +46,7 @@
 #include <coreplugin/documentmanager.h>
 #include <cpptools/cppmodelmanagerinterface.h>
 #include <qmljstools/qmljsmodelmanager.h>
+#include <projectexplorer/buildmanager.h>
 #include <projectexplorer/buildtargetinfo.h>
 #include <projectexplorer/deploymentdata.h>
 #include <projectexplorer/toolchain.h>
@@ -53,6 +54,7 @@
 #include <projectexplorer/target.h>
 #include <projectexplorer/projectexplorer.h>
 #include <projectexplorer/projectmacroexpander.h>
+#include <proparser/qmakevfs.h>
 #include <qtsupport/profilereader.h>
 #include <qtsupport/qtkitinformation.h>
 
@@ -344,6 +346,7 @@ Qt4Project::Qt4Project(Qt4Manager *manager, const QString& fileName) :
     m_nodesWatcher(new Internal::Qt4NodesWatcher(this)),
     m_fileInfo(new Qt4ProjectFile(fileName, this)),
     m_projectFiles(new Qt4ProjectFiles),
+    m_qmakeVfs(new QMakeVfs),
     m_qmakeGlobals(0),
     m_asyncUpdateFutureInterface(0),
     m_pendingEvaluateFuturesCount(0),
@@ -358,6 +361,10 @@ Qt4Project::Qt4Project(Qt4Manager *manager, const QString& fileName) :
     m_asyncUpdateTimer.setSingleShot(true);
     m_asyncUpdateTimer.setInterval(3000);
     connect(&m_asyncUpdateTimer, SIGNAL(timeout()), this, SLOT(asyncUpdate()));
+
+    connect(ProjectExplorerPlugin::instance()->buildManager(),
+            SIGNAL(buildQueueFinished(bool)),
+            SLOT(buildFinished(bool)));
 }
 
 Qt4Project::~Qt4Project()
@@ -365,6 +372,7 @@ Qt4Project::~Qt4Project()
     m_codeModelFuture.cancel();
     m_asyncUpdateState = ShuttingDown;
     m_manager->unregisterProject(this);
+    delete m_qmakeVfs;
     delete m_projectFiles;
     m_cancelEvaluate = true;
     // Deleting the root node triggers a few things, make sure rootProjectNode
@@ -847,6 +855,9 @@ void Qt4Project::asyncUpdate()
 {
     if (debug)
         qDebug()<<"async update, timer expired, doing now";
+
+    m_qmakeVfs->invalidateCache();
+
     Q_ASSERT(!m_asyncUpdateFutureInterface);
     m_asyncUpdateFutureInterface = new QFutureInterface<void>();
 
@@ -877,6 +888,12 @@ void Qt4Project::asyncUpdate()
     m_asyncUpdateState = AsyncUpdateInProgress;
 }
 
+void Qt4Project::buildFinished(bool success)
+{
+    if (success)
+        m_qmakeVfs->invalidateContents();
+}
+
 ProjectExplorer::IProjectManager *Qt4Project::projectManager() const
 {
     return m_manager;
@@ -1002,7 +1019,7 @@ QtSupport::ProFileReader *Qt4Project::createProFileReader(const Qt4ProFileNode *
     }
     ++m_qmakeGlobalsRefCnt;
 
-    QtSupport::ProFileReader *reader = new QtSupport::ProFileReader(m_qmakeGlobals);
+    QtSupport::ProFileReader *reader = new QtSupport::ProFileReader(m_qmakeGlobals, m_qmakeVfs);
 
     reader->setOutputDir(qt4ProFileNode->buildDir());