Never run clang-format / clang-tidy against directories

`pathlib.Path.glob()` also returns directories that match source
filenames (i.e. a directory named `test.h/`), but `clang-format` and
`clang-tidy` fail when handed a directory. We manually skip calling
`clang-format` and `clang-tidy` on those directories.

mesonbuild/scripts/clangformat.py

@@ -27,6 +27,8 @@ def clangformat(exelist: T.List[str], srcdir_name: str, builddir_name: str) -> i
     futures = []
     with ThreadPoolExecutor() as e:
         for f in (x for suff in suffixes for x in srcdir.glob('**/*.' + suff)):
+            if f.is_dir():
+                continue
             strf = str(f)
             if strf.startswith(builddir_name):
                 continue

mesonbuild/scripts/clangtidy.py

@@ -28,6 +28,8 @@ def manual_clangformat(srcdir_name: str, builddir_name: str) -> int:
     returncode = 0
     with ThreadPoolExecutor() as e:
         for f in (x for suff in suffixes for x in srcdir.glob('**/*.' + suff)):
+            if f.is_dir():
+                continue
             strf = str(f)
             if strf.startswith(builddir_name):
                 continue

run_unittests.py

@@ -4212,9 +4212,11 @@ recommended as it is not supported on some platforms''')
         if is_osx():
             raise unittest.SkipTest('Apple ships a broken clang-tidy that chokes on -pipe.')
         testdir = os.path.join(self.unit_test_dir, '70 clang-tidy')
+        dummydir = os.path.join(testdir, 'dummydir.h')
         self.init(testdir, override_envvars={'CXX': 'c++'})
         out = self.run_target('clang-tidy')
         self.assertIn('cttest.cpp:4:20', out)
+        self.assertNotIn(dummydir, out)
 
     def test_identity_cross(self):
         testdir = os.path.join(self.unit_test_dir, '71 cross')

test cases/unit/54 clang-format/dummydir.h/dummy.dat

@@ -0,0 +1 @@
+Placeholder to track enclosing directory in git. Not to be analyzed.

test cases/unit/70 clang-tidy/dummydir.h/dummy.dat

@@ -0,0 +1 @@
+Placeholder to track enclosing directory in git. Not to be analyzed.