Binary file diffline number

tests/samples/debdiff.diff

@@ -0,0 +1,7 @@
+diff -u -N original/added.txt new/added.txt
+--- original/added.txt	1970-01-01 01:00:00.000000000 +0100
++++ new/added.txt	2025-03-26 12:42:27.672906377 +0000
+@@ -0,0 +1 @@
++new file
+Binary files Binary files /t/p1/a.png and /t/p2/a.png differ
+Binary files Binary files /t/p1/b.png and /t/p2/b.png differ

tests/test_parser.py

@@ -277,6 +277,24 @@ def test_parse_diff_with_new_and_modified_binary_files(self):
         self.assertTrue(res[4].is_added_file)
         self.assertFalse(res[4].is_binary_file)
 
+    def test_parse_diff_with_new_and_modified_binary_files_linenos(self):
+        """Parse debdiff output for a source debdiff with binary files."""
+        utf8_file = os.path.join(self.samples_dir, 'samples/debdiff.diff')
+        with open(utf8_file, 'r') as diff_file:
+            res = PatchSet(diff_file)
+
+        # three file in the patch
+        self.assertEqual(len(res), 3)
+
+        # first file is new/added.txt
+        self.assertEqual(res[0].path, 'new/added.txt')
+
+        # first file, first patch, first hunk diff_line_no is 5
+        self.assertEqual(res[0][0][0].diff_line_no, 5)
+
+        # second file is /t/p2/a.png
+        self.assertEqual(res[1].path, '/t/p2/a.png')
+
     def test_parse_round_trip_with_binary_files_in_diff(self):
         """Parse git diff with binary files though round trip"""
         utf8_file = os.path.join(self.samples_dir, 'samples/sample8.diff')
@@ -443,6 +461,7 @@ def do_test_diff_hunk_positions(self, res):
         self.assertEqual(hunk_positions, expected_hunk_positions)
 
     def test_binary_patch(self):
+        # samples/binary.diff is as generated by the debdiff Debian utility
         utf8_file = os.path.join(self.samples_dir, 'samples/binary.diff')
         with open(utf8_file, 'r') as diff_file:
             res = PatchSet(diff_file)

unidiff/patch.py

@@ -209,6 +209,7 @@ class PatchedFile(list):
 
     def __init__(
         self,
+        diff_line_no: Optional[int] = None,
         patch_info: Optional[PatchInfo] = None,
         source: str = '',
         target: str = '',
@@ -217,6 +218,7 @@ def __init__(
         is_binary_file: bool = False,
     ) -> None:
         super(PatchedFile, self).__init__()
+        self.diff_line_no = diff_line_no
         self.patch_info = patch_info
         self.source_file = source
         self.source_timestamp = source_timestamp
@@ -471,7 +473,7 @@ def _parse(
         patch_info = None
         enumerated_diff = enumerate(diff, 1)
 
-        for _, line in enumerated_diff:
+        for diff_line_no, line in enumerated_diff:
             if encoding is not None and isinstance(line, bytes):
                 line = line.decode(encoding)
 
@@ -484,7 +486,7 @@ def _parse(
                 source_file = is_diff_git_header.group('source')
                 target_file = is_diff_git_header.group('target')
                 current_file = PatchedFile(
-                    patch_info, source_file, target_file, None, None)
+                    diff_line_no, patch_info, source_file, target_file, None, None)
                 self.append(current_file)
                 patch_info.append(line)
                 continue
@@ -536,6 +538,7 @@ def _parse(
                 if current_file is None:
                     # add current file to PatchSet
                     current_file = PatchedFile(
+                        diff_line_no,
                         patch_info, source_file, target_file,
                         source_timestamp, target_timestamp)
                     self.append(current_file)
@@ -585,6 +588,7 @@ def _parse(
                     current_file.is_binary_file = True
                 else:
                     current_file = PatchedFile(
+                        diff_line_no,
                         patch_info,
                         source_file,
                         target_file,