[clang-tools-extra] Allow to pass config file to clang-tidy-diff (PR #75457)

[Michael Lettrich via cfe-commits]

https://github.com/MichaelLettrich created https://github.com/llvm/llvm-project/pull/75457

    Adds a `-config-file` command line option that passes on the path of .`clang-tidy` or custom config file to the `clang-tidy` executable.

>From 05aff16d9b117e7e04c5342ec1792c91ef41e48b Mon Sep 17 00:00:00 2001
From: Michael Lettrich <michael.lettrich at cern.ch>
Date: Thu, 14 Dec 2023 11:31:28 +0100
Subject: [PATCH] Allow to pass config file to clang-tidy-diff

    Adds a `-config-file` command line option that passes on the path of .`clang-tidy` or custom config file to the `clang-tidy` executable.
---
 clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py | 4 ++++
 1 file changed, 4 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..53c990f58a7edc 100755
--- a/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
+++ b/clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
@@ -173,6 +173,8 @@ def main():
         help="checks filter, when not specified, use clang-tidy " "default",
         default="",
     )
+    parser.add_argument("-config-file", dest="config_file",
+        help="Specify the path of .clang-tidy or custom config file",default="")
     parser.add_argument("-use-color", action="store_true", help="Use colors in output")
     parser.add_argument(
         "-path", dest="build_path", help="Path used to read a compile command database."
@@ -313,6 +315,8 @@ def main():
         common_clang_tidy_args.append("-fix")
     if args.checks != "":
         common_clang_tidy_args.append("-checks=" + args.checks)
+    if args.config_file != "":
+        common_clang_tidy_args.append("-config-file=" + args.config_file)
     if args.quiet:
         common_clang_tidy_args.append("-quiet")
     if args.build_path is not None: