Add clang-tidy-fix target

Add the `clang-tidy-fix` target to apply clang-tidy fixes to the source
code.
This is done by calling `run-clang-tidy` with `-fix` argument.

Add a test case to run `clang-tidy-fix` and verify the file is changed.

Signed-off-by: Lei YU <yulei.sh@bytedance.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/unittests/helpers.py b/unittests/helpers.py
index 7483f51b7..83327cbad 100644
--- a/unittests/helpers.py
+++ b/unittests/helpers.py
@@ -12,7 +12,7 @@ from contextlib import contextmanager
 from mesonbuild.compilers import detect_c_compiler, compiler_from_language
 from mesonbuild.mesonlib import (
     MachineChoice, is_osx, is_cygwin, EnvironmentException, OptionKey, MachineChoice,
-    OrderedSet
+    OrderedSet, quiet_git
 )
 from run_tests import get_fake_env
 
@@ -135,6 +135,9 @@ def is_tarball():
         return True
     return False
 
+def is_git_repo():
+    return quiet_git(['branch'], '.')[0]
+
 @contextmanager
 def chdir(path: str):
     curdir = os.getcwd()