Copy the whole sketch into tmp folder

See arduino/Arduino#5186
Partially revert #148

Signed-off-by: Cristian Maglie <c.maglie@arduino.cc>

Author: cmaglie

src/arduino.cc/builder/sketch_loader.go

@@ -92,18 +92,11 @@ func collectAllSketchFiles(from string) ([]string, error) {
 	// Source files in the root are compiled, non-recursively. This
 	// is the only place where .ino files can be present.
 	rootExtensions := func(ext string) bool { return MAIN_FILE_VALID_EXTENSIONS[ext] || ADDITIONAL_FILE_VALID_EXTENSIONS[ext] }
-	err := utils.FindFilesInFolder(&filePaths, from, rootExtensions, false /* recurse */)
+	err := utils.FindFilesInFolder(&filePaths, from, rootExtensions, true /* recurse */)
 	if err != nil {
 		return nil, i18n.WrapError(err)
 	}
 
-	// The "src/" subdirectory of a sketch is compiled recursively
-	// (but .ino files are *not* compiled)
-	srcPath := filepath.Join(from, constants.SKETCH_FOLDER_SRC)
-	if info, err := os.Stat(srcPath); err == nil && info.IsDir() {
-		srcExtensions := func(ext string) bool { return ADDITIONAL_FILE_VALID_EXTENSIONS[ext] }
-		err = utils.FindFilesInFolder(&filePaths, srcPath, srcExtensions, true /* recurse */)
-	}
 	return filePaths, i18n.WrapError(err)
 }
 

src/arduino.cc/builder/test/sketch_with_subfolders/sketch_with_subfolders.ino

@@ -1,4 +1,4 @@
-#include "src/subfolder/other.h"
+#include "subfolder/other.h"
 
 MyClass myClass;
 
@@ -7,4 +7,4 @@ void setup() {
 }
 
 void loop() {
-}
+}