[clang-tools-extra] Add ability to pass in a clang-tidy config file to clang-tidy-diff (PR #75721)

[Chris Apple via cfe-commits]

https://github.com/cjappl updated https://github.com/llvm/llvm-project/pull/75721

>From 433f4ac919a6967c278e56a19b5824e474ebd907 Mon Sep 17 00:00:00 2001
From: Chris Apple <14171107+cjappl at users.noreply.github.com>
Date: Sat, 16 Dec 2023 15:53:56 -0800
Subject: [PATCH 1/3] Add ability to pass in a clang-tidy config file to
 clang-tidy-diff

---
 clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py b/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
index 8817e2914f6e25..fdaf1a4330e060 100755
--- a/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
+++ b/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
@@ -223,6 +223,12 @@ def main():
         default=[],
         help="Load the specified plugin in clang-tidy.",
     )
+    parser.add_argument(
+        "-config",
+        dest="config",
+        default=None,
+        help="Specifies a clang-tidy config file"
+    )
 
     clang_tidy_args = []
     argv = sys.argv[1:]
@@ -309,6 +315,8 @@ def main():
 
     # Form the common args list.
     common_clang_tidy_args = []
+    if args.config is not None:
+        common_clang_tidy_args.append("--config-file=" + args.config)
     if args.fix:
         common_clang_tidy_args.append("-fix")
     if args.checks != "":

>From ff3e289814d8af2c3c8eea12e3ee3c48959aa79a Mon Sep 17 00:00:00 2001
From: Chris Apple <14171107+cjappl at users.noreply.github.com>
Date: Sat, 16 Dec 2023 16:42:28 -0800
Subject: [PATCH 2/3] Fix style

---
 clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py b/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
index fdaf1a4330e060..e20b7a2cda2dde 100755
--- a/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
+++ b/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
@@ -227,7 +227,7 @@ def main():
         "-config",
         dest="config",
         default=None,
-        help="Specifies a clang-tidy config file"
+        help="Specifies a clang-tidy config file",
     )
 
     clang_tidy_args = []

>From 05ae28f6705a7bccf36bbb3a84a17c3597b44c09 Mon Sep 17 00:00:00 2001
From: Chris Apple <14171107+cjappl at users.noreply.github.com>
Date: Sat, 16 Dec 2023 16:51:41 -0800
Subject: [PATCH 3/3] Update ReleaseNotes

---
 clang-tools-extra/docs/ReleaseNotes.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
index 6d91748e4cef18..0e2679e4fafb0e 100644
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -124,6 +124,10 @@ Improvements to clang-tidy
   exporting fixes fails. It now accepts a directory as a value for
   `-export-fixes` to export individual yaml files for each compilation unit.
 
+- Improved :program:`clang-tidy-diff.py` script. It now accepts a `-config` option
+  to pass in a configuration file to :program:`clang-tidy`. This option corresponds
+  to the `--config-file` option in :program:`clang-tidy`.
+
 - Improved :program:`run-clang-tidy.py` script. It now accepts a directory
   as a value for `-export-fixes` to export individual yaml files for each
   compilation unit.