Better schematics filename handling

.gitignore

@@ -49,3 +49,4 @@ place_footprints_test_projects/.directory
 /place_footprints_test_projects/place_footprints_temp_sheet_linear.kicad_pcb
 /place_footprints_test_projects/place_footprints_temp_sheet_matrix.kicad_pcb
 /place_footprints_test_projects/*.log
+error_dialog_GUI.py

place_footprints.py

@@ -180,8 +180,9 @@ def __init__(self, board):
         pass
 
     def parse_schematic_files(self, filename, dict_of_sheets):
-        with open(filename) as f:
+        with open(filename, encoding='utf-8') as f:
             contents = f.read().split("\n")
+        filename_dir = os.path.dirname(filename)
         # find (sheet (at and then look in next few lines for new schematics file
         for i in range(len(contents)):
             line = contents[i]
@@ -206,11 +207,17 @@ def parse_schematic_files(self, filename, dict_of_sheets):
                     logger.info(f'Did not found sheetfile and/or sheetname properties in the schematic file '
                                 f'in {filename} line:{str(i)}')
                     raise LookupError(f'Did not found sheetfile and/or sheetname properties in the schematic file '
-                                      f'in {filename} line:{str(i)}. Unsupported schematics file format')
+                                f'in {filename} line:{str(i)}. Unsupported schematics file format')
+
+                sheetfilepath = os.path.join(filename_dir, sheetfile)
                 # here I should find all sheet data
-                dict_of_sheets[sheet_id] = [sheetname, sheetfile]
+                dict_of_sheets[sheet_id] = [sheetname, sheetfilepath]
+                # test if newfound file can be opened
+                if not os.path.exists(sheetfilepath):
+                    raise LookupError(f'File {sheetfilepath} does not exists. This is either due to error in parsing'
+                                      f' schematics files, missing schematics file or an error within the schematics')
                 # open a newfound file and look for nested sheets
-                self.parse_schematic_files(sheetfile, dict_of_sheets)
+                self.parse_schematic_files(sheetfilepath, dict_of_sheets)
         return
 
     def get_list_of_footprints_with_same_id(self, fp_id):

version.txt

@@ -1 +1 @@
-1.2.11
+1.2.12