Option to skip creating tabs for identical files

vimtabdiff.py

@@ -29,6 +29,9 @@ def parse_args() -> argparse.Namespace:
     parser.add_argument("pathA", type=Path)
     parser.add_argument("pathB", type=Path)
     parser.add_argument("--vim", help="vim command to run", default="vim")
+    parser.add_argument(
+        "--onlydiffs", help="only open files where there is a diff", action="store_true"
+    )
     return parser.parse_args()
 
 
@@ -78,6 +81,12 @@ def main() -> None:
         for a, b in get_file_pairs(args.pathA, args.pathB):
             aPath = a.resolve() if a else os.devnull
             bPath = b.resolve() if b else os.devnull
+            if (
+                args.onlydiffs
+                and a and b
+                and open(aPath, mode="rb").read() == open(bPath, mode="rb").read()
+            ):
+                continue
             print(f"tabedit {aPath} | vsp {bPath}", file=vimCmdFile)
         cmds = f"""
         tabdo windo :1