Change default DEFAULT_TIDY_HEADER_DIRS to empty
* Default -header-filter will now contain only module directory.
* In a clean build of aosp_x86_64-eng, this change can reduce
the number of (duplicated) clang-tidy warnings by 77% or more.
* When compiled with WITH_TIDY=1, if DEFAULT_TIDY_HEADER_DIRS is
not set, warnings from a header file will be shown only if
the file is in a module's (sub)directory.
* Set DEFAULT_TIDY_HEADER_DIRS="bionic/|bootable/|build/|cts/|\
dalvik/|developers/|development/|frameworks/|\
libcore/|libnativehelper/|system/"
will get before this change's -header-filter.
* Fix a bug: Default header-filter was not added when
tidy_flags was defined in a module.
With this fix, some incorrectly hidden header file tidy warnings
will now show up.
Bug: 179530304
Test: make with WITH_TIDY=1 and various setting of DEFAULT_TIDY_HEADER_DIRS
Change-Id: Ia0c05349908a730862dae36be9a2dbe4f44fb6da
diff --git a/cc/config/tidy.go b/cc/config/tidy.go
index 7cc9f43..7c20dd5 100644
--- a/cc/config/tidy.go
+++ b/cc/config/tidy.go
@@ -87,27 +87,11 @@
}, ",")
})
- // Give warnings to header files only in selected directories.
- // Do not give warnings to external or vendor header files, which contain too
- // many warnings.
+ // To reduce duplicate warnings from the same header files,
+ // header-filter will contain only the module directory and
+ // those specified by DEFAULT_TIDY_HEADER_DIRS.
pctx.VariableFunc("TidyDefaultHeaderDirs", func(ctx android.PackageVarContext) string {
- if override := ctx.Config().Getenv("DEFAULT_TIDY_HEADER_DIRS"); override != "" {
- return override
- }
- return strings.Join([]string{
- "art/",
- "bionic/",
- "bootable/",
- "build/",
- "cts/",
- "dalvik/",
- "developers/",
- "development/",
- "frameworks/",
- "libcore/",
- "libnativehelper/",
- "system/",
- }, "|")
+ return ctx.Config().Getenv("DEFAULT_TIDY_HEADER_DIRS")
})
// Use WTIH_TIDY_FLAGS to pass extra global default clang-tidy flags.