Check files in hdrs

See original PR: #13

Author: erenon

.clang-tidy

@@ -6,6 +6,4 @@ Checks: >
     google-*,
     performance-*,
 
-HeaderFilterRegex: ".*"
-
 WarningsAsErrors: "*"

clang_tidy/clang_tidy.bzl

@@ -94,6 +94,9 @@ def _rule_sources(ctx):
     if hasattr(ctx.rule.attr, "srcs"):
         for src in ctx.rule.attr.srcs:
             srcs += [src for src in src.files.to_list() if src.is_source and check_valid_file_type(src)]
+    if hasattr(ctx.rule.attr, "hdrs"):
+        for hdr in ctx.rule.attr.hdrs:
+            srcs += [hdr for hdr in hdr.files.to_list() if hdr.is_source and check_valid_file_type(hdr)]
     return srcs
 
 def _toolchain_flags(ctx, action_name = ACTION_NAMES.cpp_compile):