refact(export): add checks on input params

scripts/export_graph/export_graph.py

@@ -22,7 +22,7 @@ def read_args():
     parser = argparse.ArgumentParser()
     parser.add_argument("-c", "--cache", required=True, type=str, help="path of input cache")
     parser.add_argument("-o", "--output", required=True, help="output folder")
-    parser.add_argument("-b", "--branch", required=True,
+    parser.add_argument("-b", "--branch", required=True, type=int,
                         help="id of branch of cache to use as source for patches")
     parser.add_argument('-u', '--url',
                         help="http://[serveur]:[port] (default: http://localhost:8081)",
@@ -38,11 +38,21 @@ def read_args():
     if args_prep.verbose >= 1:
         print("\nArguments: ", args_prep)
 
+    # check input cache
+    if not os.path.exists(args_prep.cache):
+        raise SystemExit(f"ERROR: folder '{args_prep.cache}' does not exist")
+
+    # check branch -> voir create_qgis_view
+
     # check input url
     url_pattern = r'^https?:\/\/[0-9A-z.]+\:[0-9]+$'
     if not re.match(url_pattern, args_prep.url):
         raise SystemExit(f"ERROR: URL '{args_prep.url}' is invalid")
 
+    # check tilesize > 0
+    if args_prep.tilesize <= 0:
+        raise SystemExit("ERROR: tilesize must be greater that zero")
+
     # check bbox
     coords = str(args_prep.bbox).split(' ')
     if any(elem is None for elem in coords) and any(elem is not None for elem in coords):