Fix clazy qfileinfo-exists warnings

From the clazy docs:

Finds places using QFileInfo("foo").exists() instead of the faster
version QFileInfo::exists("foo"). According to Qt's docs: "Using
this function is faster than using QFileInfo(file).exists() for
file system access."

src/app/openstreetmap/qgsosmimportdialog.cpp

@@ -84,7 +84,7 @@ void QgsOSMImportDialog::dbFileNameChanged( const QString& fileName )
 void QgsOSMImportDialog::onOK()
 {
   // output file exists?
-  if ( QFileInfo( editDbFileName->text() ).exists() )
+  if ( QFileInfo::exists( editDbFileName->text() ) )
   {
     int res = QMessageBox::question( this, tr( "OpenStreetMap import" ), tr( "Output database file exists already. Overwrite?" ), QMessageBox::Yes | QMessageBox::No );
     if ( res != QMessageBox::Yes )

src/app/qgisapp.cpp

@@ -1765,7 +1765,7 @@ void QgisApp::createActions()
   mActionReportaBug->setShortcut( QString() );
 #endif
 
-  mActionHelpContents->setEnabled( QFileInfo( QgsApplication::pkgDataPath() + "/doc/index.html" ).exists() );
+  mActionHelpContents->setEnabled( QFileInfo::exists( QgsApplication::pkgDataPath() + "/doc/index.html" ) );
 
   connect( mActionHelpContents, SIGNAL( triggered() ), this, SLOT( helpContents() ) );
   connect( mActionHelpAPI, SIGNAL( triggered() ), this, SLOT( apiDocumentation() ) );
@@ -9185,7 +9185,7 @@ void QgisApp::helpContents()
 
 void QgisApp::apiDocumentation()
 {
-  if ( QFileInfo( QgsApplication::pkgDataPath() + "/doc/api/index.html" ).exists() )
+  if ( QFileInfo::exists( QgsApplication::pkgDataPath() + "/doc/api/index.html" ) )
   {
     openURL( "api/index.html" );
   }

src/app/qgshandlebadlayers.cpp

@@ -209,7 +209,7 @@ QString QgsHandleBadLayers::filename( int row )
 
 void QgsHandleBadLayers::setFilename( int row, const QString& filename )
 {
-  if ( !QFileInfo( filename ).exists() )
+  if ( !QFileInfo::exists( filename ) )
     return;
 
   QString type = mLayerList->item( row, 1 )->text();

src/core/gps/qgsgpsdetector.cpp

@@ -48,7 +48,7 @@ QList< QPair<QString, QString> > QgsGPSDetector::availablePorts()
   {
     for ( int i = 0; i < 10; ++i )
     {
-      if ( QFileInfo( linuxDev.arg( i ) ).exists() )
+      if ( QFileInfo::exists( linuxDev.arg( i ) ) )
       {
         devs << QPair<QString, QString>( linuxDev.arg( i ), linuxDev.arg( i ) );
       }

src/gui/qgscodeeditorpython.cpp

@@ -74,7 +74,7 @@ void QgsCodeEditorPython::setSciLexerPython()
   }
   else if ( mAPISFilesList.length() == 1 && mAPISFilesList[0].right( 3 ) == "pap" )
   {
-    if ( !QFileInfo( mAPISFilesList[0] ).exists() )
+    if ( !QFileInfo::exists( mAPISFilesList[0] ) )
     {
       QgsDebugMsg( QString( "The apis file %1 not found" ).arg( mAPISFilesList.at( 0 ) ) );
       return;
@@ -86,7 +86,7 @@ void QgsCodeEditorPython::setSciLexerPython()
   {
     for ( int i = 0; i < mAPISFilesList.size(); i++ )
     {
-      if ( !QFileInfo( mAPISFilesList[i] ).exists() )
+      if ( !QFileInfo::exists( mAPISFilesList[i] ) )
       {
         QgsDebugMsg( QString( "The apis file %1 was not found" ).arg( mAPISFilesList.at( i ) ) );
         return;

src/gui/qgsprojectionselector.cpp

@@ -308,7 +308,7 @@ QString QgsProjectionSelector::selectedProj4String()
   if ( srsId.toLong() >= USER_CRS_START_ID )
   {
     databaseFileName = QgsApplication::qgisUserDbFilePath();
-    if ( !QFileInfo( databaseFileName ).exists() ) //its unlikely that this condition will ever be reached
+    if ( !QFileInfo::exists( databaseFileName ) ) //its unlikely that this condition will ever be reached
       return QString();
   }
   else //must be a system projection then
@@ -372,7 +372,7 @@ QString QgsProjectionSelector::getSelectedExpression( const QString& expression
   if ( lvi->text( QGIS_CRS_ID_COLUMN ).toLong() >= USER_CRS_START_ID )
   {
     databaseFileName = QgsApplication::qgisUserDbFilePath();
-    if ( !QFileInfo( databaseFileName ).exists() )
+    if ( !QFileInfo::exists( databaseFileName ) )
     {
       return QString();
     }
@@ -483,7 +483,7 @@ void QgsProjectionSelector::loadUserCrsList( QSet<QString> *crsFilter )
   // if it doesnt exist we copy it in from the global resources dir
 
   //return straight away if the user has not created any custom projections
-  if ( !QFileInfo( databaseFileName ).exists() )
+  if ( !QFileInfo::exists( databaseFileName ) )
   {
     QgsDebugMsg( "Users qgis.db not found...skipping" );
     mUserProjListDone = true;
@@ -566,7 +566,7 @@ void QgsProjectionSelector::loadCrsList( QSet<QString> *crsFilter )
   //read only filesystem because otherwise sqlite will try
   //to create the db file on the fly
 
-  if ( !QFileInfo( mSrsDatabaseFileName ).exists() )
+  if ( !QFileInfo::exists( mSrsDatabaseFileName ) )
   {
     mProjListDone = true;
     return;
@@ -888,7 +888,7 @@ long QgsProjectionSelector::getLargestCrsIdMatch( const QString& theSql )
 
   //check the db is available
   QString databaseFileName = QgsApplication::qgisUserDbFilePath();
-  if ( QFileInfo( databaseFileName ).exists() ) //only bother trying to open if the file exists
+  if ( QFileInfo::exists( databaseFileName ) ) //only bother trying to open if the file exists
   {
     result = sqlite3_open_v2( databaseFileName.toUtf8().data(), &database, SQLITE_OPEN_READONLY, nullptr );
     if ( result )

src/gui/symbology-ng/qgssymbollayerwidget.cpp

@@ -2036,7 +2036,7 @@ void QgsSvgMarkerSymbolLayerWidget::on_mFileToolButton_clicked()
 
 void QgsSvgMarkerSymbolLayerWidget::on_mFileLineEdit_textEdited( const QString& text )
 {
-  if ( !QFileInfo( text ).exists() )
+  if ( !QFileInfo::exists( text ) )
   {
     return;
   }
@@ -2047,7 +2047,7 @@ void QgsSvgMarkerSymbolLayerWidget::on_mFileLineEdit_textEdited( const QString&
 
 void QgsSvgMarkerSymbolLayerWidget::on_mFileLineEdit_editingFinished()
 {
-  if ( !QFileInfo( mFileLineEdit->text() ).exists() )
+  if ( !QFileInfo::exists( mFileLineEdit->text() ) )
   {
     QUrl url( mFileLineEdit->text() );
     if ( !url.isValid() )

src/providers/delimitedtext/qgsdelimitedtextsourceselect.cpp

@@ -670,7 +670,7 @@ bool QgsDelimitedTextSourceSelect::validate()
   {
     message = tr( "Please select an input file" );
   }
-  else if ( ! QFileInfo( txtFilePath->text() ).exists() )
+  else if ( ! QFileInfo::exists( txtFilePath->text() ) )
   {
     message = tr( "File %1 does not exist" ).arg( txtFilePath->text() );
   }

src/providers/grass/qgsgrass.cpp

@@ -759,7 +759,7 @@ void QgsGrass::setMapsetSearchPathWatcher()
 
   QString searchFilePath = getDefaultMapsetPath() + "/SEARCH_PATH";
 
-  if ( QFileInfo( searchFilePath ).exists() )
+  if ( QFileInfo::exists( searchFilePath ) )
   {
     QgsDebugMsg( "add watcher on SEARCH_PATH file " + searchFilePath );
     mMapsetSearchPathWatcher->addPath( searchFilePath );
@@ -781,7 +781,7 @@ void QgsGrass::onSearchPathFileChanged( const QString & path )
   {
     // changed or removed
     loadMapsetSearchPath();
-    if ( !QFileInfo( searchFilePath ).exists() ) // removed
+    if ( !QFileInfo::exists( searchFilePath ) ) // removed
     {
       // reset watcher to mapset
       setMapsetSearchPathWatcher();
@@ -790,7 +790,7 @@ void QgsGrass::onSearchPathFileChanged( const QString & path )
   else
   {
     // mapset directory changed
-    if ( QFileInfo( searchFilePath ).exists() ) // search path file added
+    if ( QFileInfo::exists( searchFilePath ) ) // search path file added
     {
       loadMapsetSearchPath();
       setMapsetSearchPathWatcher();

src/providers/grass/qgsgrassimport.cpp

@@ -804,7 +804,7 @@ bool QgsGrassExternal::import()
     QString cmd = QgsGrass::gisbase() + "/bin/r.external";
     QStringList arguments;
 
-    if ( QFileInfo( mSource ).exists() )
+    if ( QFileInfo::exists( mSource ) )
     {
       arguments << "input=" + mSource;
     }

src/providers/grass/qgsgrassvectormap.cpp

@@ -504,7 +504,7 @@ bool QgsGrassVectorMap::mapOutdated()
   {
     // If the cidx file has been deleted, the map is currently being modified
     // by an external tool. Do not update until the cidx file has been recreated.
-    if ( !QFileInfo( dp + "/cidx" ).exists() )
+    if ( !QFileInfo::exists( dp + "/cidx" ) )
     {
       QgsDebugMsg( "The map is being modified and is unavailable : " + mGrassObject.toString() );
       return false;

src/providers/ogr/qgsogrdataitems.cpp

@@ -298,7 +298,7 @@ QGISEXTERN QgsDataItem * dataItem( QString thePath, QgsDataItem* parentItem )
   if ( suffix == "dbf" )
   {
     QString pathShp = thePath.left( thePath.count() - 4 ) + ".shp";
-    if ( QFileInfo( pathShp ).exists() )
+    if ( QFileInfo::exists( pathShp ) )
       return nullptr;
   }
 

tests/src/providers/testqgswcspublicservers.cpp

@@ -374,7 +374,7 @@ void TestQgsWcsPublicServers::test()
         QString myPath = myVersionDirPath + '/' + myCoverage.identifier;
         QString myLogPath = myPath + ".log";
 
-        if ( QFileInfo( myLogPath ).exists() && !mForce )
+        if ( QFileInfo::exists( myLogPath ) && !mForce )
         {
           //QMap<QString, QString> log = readLog( myLogPath );
           //if ( !log.value( "identifier" ).isEmpty() && log.value( "error" ).isEmpty() ) continue;