Allow patches to ignore filesize so a partial file can be patched.

arcadeutils/README.md

@@ -91,6 +91,8 @@ instead patch the reverse of each patch. A binary that was patched using `Binary
 can be reverted back to the original format by calling `BinaryDiff.patch` again with
 the "reverse" argument set to True. Note that the only restriction to this is if any of
 the patches include wildcards then the resulting patched binary cannot be reversed.
+If you pass in the optional boolean keyword argument "ignore_size_differences" then the
+"File Size" comment will be ignored.
 
 ### Patch Format
 

arcadeutils/binary.py

@@ -166,14 +166,17 @@ class BinaryDiff:
         patchlines: List[str],
         *,
         reverse: bool = False,
+        ignore_size_differences: bool = False,
     ) -> bytes:
         # First, grab the differences
-        file_size = BinaryDiff.size(patchlines)
-        if file_size is not None and file_size != len(binary):
-            raise BinaryDiffException(
-                f"Patch is for binary of size {file_size} but binary is {len(binary)} "
-                f"bytes long!"
-            )
+        if not ignore_size_differences:
+            file_size = BinaryDiff.size(patchlines)
+            if file_size is not None and file_size != len(binary):
+                raise BinaryDiffException(
+                    f"Patch is for binary of size {file_size} but binary is {len(binary)} "
+                    f"bytes long!"
+                )
+
         differences: List[Tuple[int, Optional[bytes], bytes]] = sorted(
             BinaryDiff._gather_differences(patchlines, reverse),
             key=lambda diff: diff[0],

setup.py

@@ -8,7 +8,7 @@ with open(os.path.join("arcadeutils", "README.md"), "r", encoding="utf-8") as fh
 
 setup(
     name='arcadeutils',
-    version='0.1.2',
+    version='0.1.3',
     description='Collection of utilities written in Python for working with various arcade binaries.',
     long_description=long_description,
     long_description_content_type="text/markdown",