On --import check for valid file types

src/core/main.cpp

@@ -180,7 +180,10 @@ int main( int argc, char * * argv )
 	bool allowRoot = false;
 	bool renderLoop = false;
 	bool renderTracks = false;
-	QString fileToLoad, fileToImport, renderOut, profilerOutputFile;
+	QString fileToLoad = "";
+	QString fileToImport = "";
+	QString renderOut = "";
+	QString profilerOutputFile = "";
 
 	// first of two command-line parsing stages
 	for( int i = 1; i < argc; ++i )
@@ -537,17 +540,53 @@ int main( int argc, char * * argv )
 	}
 
 	// Test file argument before continuing
-	QFileInfo fileInfo( fileToLoad );
+	QFileInfo fileInfoLoad( fileToLoad );
+	QFileInfo fileInfoImport( fileToImport );
 	if( !fileToLoad.isEmpty() )
 	{
-		if ( !fileInfo.exists() || !fileInfo.isFile()  )
+		if( !fileInfoLoad.exists() )
 		{
-			printf("The file %s does not exist!\n", fileToLoad.toStdString().c_str());
+			printf( "The file %s does not exist!\n",
+					fileToLoad.toStdString().c_str() );
 			exit( 1 );
 		}
-		else if( ! ( fileInfo.suffix() == "mmp" || fileInfo.suffix() == "mmpz" ) )
+		else if( fileInfoLoad.isDir() )
 		{
-			printf("%s is not an LMMS project file!\n", fileToLoad.toStdString().c_str());
+			printf( "%s is a directory!\n",
+					fileToLoad.toStdString().c_str() );
+			exit( 1 );
+		}
+		else if( !( fileInfoLoad.suffix() == "mmp" ||
+					fileInfoLoad.suffix() == "mmpz" ) )
+		{
+			printf( "%s is not an LMMS project file!\n",
+					fileToLoad.toStdString().c_str() );
+			exit( 1 );
+		}
+	}
+	else if( !fileToImport.isEmpty() )
+	{
+		if( !fileInfoImport.exists() )
+		{
+			printf( "The file %s does not exist!\n",
+					fileToImport.toStdString().c_str() );
+			exit( 1 );
+		}
+		else if( fileInfoImport.isDir() )
+		{
+			printf( "%s is a directory!\n",
+					fileToImport.toStdString().c_str() );
+			exit( 1 );
+		}
+		else if( !(
+					fileInfoImport.suffix() == "mid"	||
+					fileInfoImport.suffix() == "midi"	||
+					fileInfoImport.suffix() == "rmi"	||
+					fileInfoImport.suffix() == "flp"	||
+					fileInfoImport.suffix() == "h2song" ) )
+		{
+			printf( ".%s is not a filetype that LMMS can import!\n",
+					fileInfoImport.suffix().toStdString().c_str() );
 			exit( 1 );
 		}
 	}