patch-fixer 0.3.0

Fixes erroneous git apply patches to the best of its ability.

patch-fixer

So you asked an LLM to generate a code diff, tried to apply it with git apply, and got a bunch of malformed patch errors? Well fear no more, patch_fixer.py is here to save the day... more or less.

Installation

# Make sure you're using at least python 3.10
python -m venv .venv/
source .venv/bin/activate
pip install patch-fixer

Usage

API:

>>> from patch_fixer import fix_patch
>>>
>>> patch_file = "/path/to/broken.patch"
>>> original = "/path/to/original/state"    # file or directory being patched
>>> with open(patch_file, encoding="utf-8") as f:
...     patch_lines = f.readlines()
...     
>>> fixed_lines = fix_patch(patch_lines, original)
>>> output_file = "/path/to/fixed.patch"
>>>
>>> with open(output_file, 'w', encoding='utf-8') as f:
...     f.writelines(fixed_lines)
>>>

Command line:

python patch_fixer/patch_fixer.py original broken.patch fixed.patch

where original is the file or directory you were trying to patch, broken.patch is the malformed patch generated by the LLM, and fixed.patch is the output file containing the (hopefully) fixed patch.

Local Testing

git clone https://github.com/ajcm474/patch-fixer.git
cd patch-fixer
pip install -e .[test]
pytest

From version 0.3.0 onward (at least until version 1.0), some test failures are expected in bugfix versions as I like to use test-driven development to build out new features. Please only report test failures if the same test passed in the most recent 0.x.0 version.

License

This is free and open source software, released under the Apache 2.0 License. See LICENSE for details.