go example_unix_walk_test 源码
golang example_unix_walk_test 代码
文件路径：/src/path/filepath/example_unix_walk_test.go
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build !windows && !plan9
package filepath_test
import (
"fmt"
"io/fs"
"os"
"path/filepath"
)
func prepareTestDirTree(tree string) (string, error) {
tmpDir, err := os.MkdirTemp("", "")
if err != nil {
return "", fmt.Errorf("error creating temp directory: %v\n", err)
}
err = os.MkdirAll(filepath.Join(tmpDir, tree), 0755)
if err != nil {
os.RemoveAll(tmpDir)
return "", err
}
return tmpDir, nil
}
func ExampleWalk() {
tmpDir, err := prepareTestDirTree("dir/to/walk/skip")
if err != nil {
fmt.Printf("unable to create test dir tree: %v\n", err)
return
}
defer os.RemoveAll(tmpDir)
os.Chdir(tmpDir)
subDirToSkip := "skip"
fmt.Println("On Unix:")
err = filepath.Walk(".", func(path string, info fs.FileInfo, err error) error {
if err != nil {
fmt.Printf("prevent panic by handling failure accessing a path %q: %v\n", path, err)
return err
}
if info.IsDir() && info.Name() == subDirToSkip {
fmt.Printf("skipping a dir without errors: %+v \n", info.Name())
return filepath.SkipDir
}
fmt.Printf("visited file or dir: %q\n", path)
return nil
})
if err != nil {
fmt.Printf("error walking the path %q: %v\n", tmpDir, err)
return
}
// Output:
// On Unix:
// visited file or dir: "."
// visited file or dir: "dir"
// visited file or dir: "dir/to"
// visited file or dir: "dir/to/walk"
// skipping a dir without errors: skip
}
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