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

common/dirwalk/tests/tools/walkdir/fileprocessor_print.go

+// Copyright 2016 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package main
+
+import (
+        "fmt"
+        "io"
+)
+
+// PrintFileProcessor implements FileProcessor. It prints the path of each found file.
+type PrintFileProcessor struct {
+        BaseFileProcessor
+        obuf io.Writer
+}
+
+func (p *PrintFileProcessor) Dir(path string) {
+        fmt.Fprintln(p.obuf, "  dir", path)
+        p.BaseFileProcessor.Dir(path)
+}
+
+func (p *PrintFileProcessor) SmallFile(path string, r io.ReadCloser) {
+        fmt.Fprintln(p.obuf, "small", path)
+        p.BaseFileProcessor.SmallFile(path, r)
+}
+
+func (p *PrintFileProcessor) LargeFile(path string, r io.ReadCloser) {
+        fmt.Fprintln(p.obuf, "large", path)
+        p.BaseFileProcessor.LargeFile(path, r)
+}