add initial .git-blame-ignore-revs

Signed-off-by: Eric Engestrom <eric@igalia.com>
Reviewed-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24049>

.git-blame-ignore-revs

@@ -0,0 +1,47 @@
+# List of commits to ignore when using `git blame`.
+#
+# Per git-blame(1):
+#   Ignore revisions listed in the file, one unabbreviated object name
+#   per line, in git-blame. Whitespace and comments beginning with # are
+#   ignored.
+#
+# Please keep these in chronological order :)
+#
+# You can add a new commit with the following command:
+#   git log -1 --pretty=format:'%n# %s%n%H%n' >> .git-blame-ignore-revs $COMMIT
+
+# pvr: Fix clang-format error.
+0ad5b0a74ef73f5fcbe1406ad9d57fe5dc00a5b1
+
+# panfrost: Fix up some formatting for clang-format
+a4705afe63412498d13ded73cba969c66be67907
+
+# asahi: clang-format the world again
+26c51bb8d8a33098b1990425a391f56ffba5728c
+
+# perfetto: Add a .clang-format for the directory.
+da78d5d729b1800136dd713b68492cb339993f4a
+
+# panfrost/winsys: Clang-format
+c90f036516a5376002be6550a917e8bad6a8a3b8
+
+# panfrost: Re-run clang-format
+4ccf174009af6732cbffa5d8ebb4687da7517505
+
+# panvk: Clang-format
+c7bf3b69ebc8f2252dbf724a4de638e6bb2ac402
+
+# pan/mdg: Fix icky formatting
+133af0d6c945d3aaca8989edd15283a2b7dcc6c7
+
+# mapi: clang-format _glapi_add_dispatch()
+30332529663268a6406e910848e906e725e6fda7
+
+# radv: reformat according to its .clang-format
+8b319c6db8bd93603b18bd783eb75225fcfd51b7
+
+# aco: reformat according to its .clang-format
+6b21653ab4d3a67e711fe10e3d403128b6d26eb2
+
+# egl: re-format using clang-format
+2f670d89db038d5a29f6b72732fd7ad63dfaf4c6

docs/codingstyle.rst

@@ -18,6 +18,12 @@ You can re-format the code for the components that have opted-in to the
 formatting enforcement (listed in ``.clang-format-include``) by simply
 running ``ninja -C build/ clang-format``.
 
+Since mass-reformatting commits can be an annoying extra jump to go
+through when looking at ``git blame``, you can configure it to ignore
+them by running::
+
+  git config blame.ignoreRevsFile .git-blame-ignore-revs
+
 Most code editors also support automatically formatting code as you
 write it; check your editor or its pluggins to see how to enable this.