RBE should not copy source file back to local
Test: make with default RBE variables plus:
WITH_TIDY=1 CLANG_ANALYZER_CHECKS=1
RBE_CLANG_TIDY=true
RBE_CLANG_TIDY_EXEC_STRATEGY=remote_local_fallback
Bug: b/157147559
Change-Id: I1c0106312910919cfda99b816cc8d0f9731b8bd1
diff --git a/cc/builder.go b/cc/builder.go
index 842ce85..0e6d0b7 100644
--- a/cc/builder.go
+++ b/cc/builder.go
@@ -205,11 +205,13 @@
Labels: map[string]string{"type": "lint", "tool": "clang-tidy", "lang": "cpp"},
ExecStrategy: "${config.REClangTidyExecStrategy}",
Inputs: []string{"$in"},
- // OutputFile here is $in for remote-execution since its possible that
- // clang-tidy modifies the given input file itself and $out refers to the
- // ".tidy" file generated for ninja-dependency reasons.
- OutputFiles: []string{"$in"},
- Platform: map[string]string{remoteexec.PoolKey: "${config.REClangTidyPool}"},
+ // Although clang-tidy has an option to "fix" source files, that feature is hardly useable
+ // under parallel compilation and RBE. So we assume no OutputFiles here.
+ // The clang-tidy fix option is best run locally in single thread.
+ // Copying source file back to local caused two problems:
+ // (1) New timestamps trigger clang and clang-tidy compilations again.
+ // (2) Changing source files caused concurrent clang or clang-tidy jobs to crash.
+ Platform: map[string]string{remoteexec.PoolKey: "${config.REClangTidyPool}"},
}, []string{"cFlags", "tidyFlags"}, []string{})
_ = pctx.SourcePathVariable("yasmCmd", "prebuilts/misc/${config.HostPrebuiltTag}/yasm/yasm")