luci-go/common/dirwalk: Code for walking a directory tree efficiently

common/dirwalk/tests/tools/gendir/util.go

Index: common/dirwalk/tests/tools/gendir/util.go
diff --git a/grpc/cmd/rpc/generate.go b/common/dirwalk/tests/tools/gendir/util.go
similarity index 55%
copy from grpc/cmd/rpc/generate.go
copy to common/dirwalk/tests/tools/gendir/util.go
index 478b3b55659be097da7e7bee56410350d232916f..22cd5724c430e49a727aac80c83e8a8923ec5ae8 100644
--- a/grpc/cmd/rpc/generate.go
+++ b/common/dirwalk/tests/tools/gendir/util.go
@@ -4,4 +4,15 @@
 
 package main
 
-//go:generate cproto -desc=printer_test.desc -discovery=false
+func min(a uint64, b uint64) uint64 {
+	if a > b {
+		return b
+	}
+	return a
+}
+func max(a uint64, b uint64) uint64 {
+	if a < b {
+		return b
+	}
+	return a
+}