ensure for NCD conversion that both input & output are in same folder

Author: Teque5

sigmf/convert/__init__.py

@@ -20,8 +20,8 @@ def main() -> None:
     Unified entry-point for SigMF conversion of non-SigMF files.
     """
     parser = argparse.ArgumentParser(description="Convert non-SigMF files to SigMF format")
-    parser.add_argument("-i", "--input", type=str, required=True, help="Input file path")
-    parser.add_argument("-o", "--output", type=str, default=None, help="Output SigMF path")
+    parser.add_argument("input", type=str, help="Input file path")
+    parser.add_argument("output", type=str, help="Output SigMF path (no extension)")
     parser.add_argument("-v", "--verbose", action="count", default=0)
     parser.add_argument(
         "-a", "--archive", action="store_true", help="Save as SigMF archive instead of separate meta/data files."
@@ -40,6 +40,14 @@ def main() -> None:
     logging.basicConfig(level=level_lut[min(args.verbose, 2)])
 
     input_path = Path(args.input)
+    output_path = Path(args.output)
+
+    # validate that ncd files are in same directory as input
+    if args.ncd and input_path.parent.resolve() != output_path.parent.resolve():
+        raise SigMFConversionError(
+            f"NCD files must be in the same directory as input file. "
+            f"Input: {input_path.parent.resolve()}, Output: {output_path.parent.resolve()}"
+        )
 
     # detect file type using magic bytes (same logic as fromfile())
     magic_bytes = get_magic_bytes(input_path, count=4, offset=0)
@@ -48,13 +56,13 @@ def main() -> None:
         # WAV file
         from .wav import wav_to_sigmf
 
-        _ = wav_to_sigmf(wav_path=input_path, out_path=args.output, create_archive=args.archive, create_ncd=args.ncd)
+        _ = wav_to_sigmf(wav_path=input_path, out_path=output_path, create_archive=args.archive, create_ncd=args.ncd)
 
     elif magic_bytes == b"BLUE":
         # BLUE file
         from .blue import blue_to_sigmf
 
-        _ = blue_to_sigmf(blue_path=input_path, out_path=args.output, create_archive=args.archive, create_ncd=args.ncd)
+        _ = blue_to_sigmf(blue_path=input_path, out_path=output_path, create_archive=args.archive, create_ncd=args.ncd)
 
     else:
         raise SigMFConversionError(