Fix "File name case mismatch" error when debugging QML apps (Win)

Work around QTBUG-17529 by normalizing the capitalization of the
working directory (which we do already for launching apps without
debugging).

Task-number: QTCREATORBUG-4592
Reviewed-by: Friedemann Kleint

src/libs/utils/winutils.cpp

@@ -163,6 +163,19 @@ QTCREATOR_UTILS_EXPORT QString getLongPathName(const QString &name)
     return rc;
 }
 
+// makes sure that capitalization of directories is canonical.
+// This mimics the logic in QDeclarative_isFileCaseCorrect
+QTCREATOR_UTILS_EXPORT QString normalizePathName(const QString &name)
+{
+    QString canonicalName = getShortPathName(name);
+    if (canonicalName.isEmpty())
+        return name;
+    canonicalName = getLongPathName(canonicalName);
+    if (canonicalName.isEmpty())
+        return name;
+    return canonicalName;
+}
+
 QTCREATOR_UTILS_EXPORT unsigned long winQPidToPid(const Q_PID qpid)
 {
     const PROCESS_INFORMATION *processInfo = reinterpret_cast<const PROCESS_INFORMATION*>(qpid);

src/libs/utils/winutils.h

@@ -59,6 +59,9 @@ QTCREATOR_UTILS_EXPORT QString getShortPathName(const QString &name);
 // Returns long name
 QTCREATOR_UTILS_EXPORT QString getLongPathName(const QString &name);
 
+// Returns long name with canonical capitalization.
+QTCREATOR_UTILS_EXPORT QString normalizePathName(const QString &name);
+
 QTCREATOR_UTILS_EXPORT unsigned long winQPidToPid(const Q_PID qpid);
 
 QTCREATOR_UTILS_EXPORT bool winIs64BitSystem();

src/plugins/debugger/debuggerrunner.cpp

@@ -46,6 +46,7 @@
 
 #ifdef Q_OS_WIN
 #  include "peutils.h"
+#  include <utils/winutils.h>
 #endif
 
 #include <projectexplorer/abi.h>
@@ -675,6 +676,12 @@ static DebuggerStartParameters localStartParameters(RunConfiguration *runConfigu
     sp.startMode = StartInternal;
     sp.environment = rc->environment();
     sp.workingDirectory = rc->workingDirectory();
+
+#if defined(Q_OS_WIN)
+    // Work around QTBUG-17529 (QtDeclarative fails with 'File name case mismatch' ...)
+    sp.workingDirectory = Utils::normalizePathName(sp.workingDirectory);
+#endif
+
     sp.executable = rc->executable();
     sp.processArgs = rc->commandLineArguments();
     sp.toolChainAbi = rc->abi();

src/plugins/projectexplorer/applicationlauncher_win.cpp

@@ -71,10 +71,7 @@ ApplicationLauncher::~ApplicationLauncher()
 void ApplicationLauncher::setWorkingDirectory(const QString &dir)
 {
     // Work around QTBUG-17529 (QtDeclarative fails with 'File name case mismatch' ...)
-    QString fixedPath = dir;
-    const QString longPath = Utils::getLongPathName(dir);
-    if (!longPath.isEmpty())
-        fixedPath = longPath;
+    const QString fixedPath = Utils::normalizePathName(dir);
 
     d->m_winGuiProcess.setWorkingDirectory(fixedPath);
     d->m_consoleProcess.setWorkingDirectory(fixedPath);

src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp

@@ -45,7 +45,7 @@
 #include <qt4projectmanager/qtoutputformatter.h>
 #include <qt4projectmanager/qt4projectmanagerconstants.h>
 
-#ifdef Q_OS_WIN32
+#ifdef Q_OS_WIN
 #include <utils/winutils.h>
 #endif
 
@@ -180,20 +180,13 @@ void QmlProjectRunConfiguration::setQtVersionId(int id)
 }
 
 /* QtDeclarative checks explicitly that the capitalization for any URL / path
-   is exactly like the capitalization on disk. This method is uses the same
-   native Windows API's to get the exact canonical path. */
+   is exactly like the capitalization on disk.*/
 QString QmlProjectRunConfiguration::canonicalCapsPath(const QString &fileName)
 {
     QString canonicalPath = QFileInfo(fileName).canonicalFilePath();
 
-#if defined(Q_OS_WIN32)
-    // don't know whether the shortpath step is really needed,
-    // but we do this in QtDeclarative too.
-    QString path = Utils::getShortPathName(canonicalPath);
-    if (!path.isEmpty())
-        path = Utils::getLongPathName(canonicalPath);
-    if (!path.isEmpty())
-        canonicalPath = path;
+#if defined(Q_OS_WIN)
+    canonicalPath = Utils::normalizePathName(canonicalPath);
 #endif
 
     return canonicalPath;