Ignored formatting in blame, updated changelog, added contributin.md

Author: DiamonDinoia

CHANGELOG

@@ -18,6 +18,10 @@ If not stated, FINUFFT is assumed (cuFINUFFT <=1.3 is listed separately).
 * MAX_NF increased from 1e11 to 1e12, since machines grow.
 * improved GPU python docs: migration guide; usage from cupy, numba, torch,
   pycuda. PyPI pkg still at 2.2.0beta.
+* Added a clang-format pre-commit hook to ensure consistent code style.
+  Created a .clang-format file to define the style similar to the existing style.
+  Applied clang-format to all cmake, C, C++, and CUDA code. Ignored the blame
+  using .git-blame-ignore-revs. Added a contributing.md for developers.
 
 V 2.2.0 (12/12/23)
 

contributing.md

@@ -0,0 +1,15 @@
+This repository is formatted according to the .clang-format in the root directory. 
+Please enable the reformatting hook before committing your changes.
+See [pre-commit](https://pre-commit.com/) for more information.
+A quick summary:
+```
+pip install pre-commit
+pre-commit install
+```
+
+We also suggest to configure your IDE to use the same formatting settings.
+
+Another suggestion is to ignore the formatting commits in your git configuration:
+```
+git config blame.ignoreRevsFile .git-blame-ignore-revs
+```

docs/devnotes.rst

@@ -3,7 +3,7 @@
 Developer notes
 ===============
 
-* Developers needing to update/regenerate documentation in general, including our readthedocs website, see ``docs/README``. Developers changing MATLAB/octave interfaces or docs, also see ``matlab/README``.
+* Developers needing to update/regenerate documentation in general, including our readthedocs website, see ``docs/README``. Developers changing MATLAB/octave interfaces or docs, also see ``matlab/README``. Please also see ``contributing.md`` for code style and git hook guidelines.
 
 * To update the version number, this needs to be done by hand in the following places: