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io/fs: added an example for io/fs.WalkDir

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The documentation currently does not show how to get an `FS` instance for the operating system's filesystem. This example demonstrates how to accomplish this using the `os` package.

Fixes #46083

Change-Id: I053111c12ab09ef13f0d04fcdff8a6ea0dccf379
Reviewed-on: https://go-review.googlesource.com/c/go/+/319989
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Emmanuel Odeke <emmanuel@orijtech.com>
This commit is contained in:
Adam Mitha 2021-05-13 20:52:41 -07:00 committed by Emmanuel Odeke
parent baa934d26d
commit 831573cd21
1 changed files with 25 additions and 0 deletions
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src/io/fs/example_test.go Normal file
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// Copyright 2021 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.
package fs_test
import (
"fmt"
"io/fs"
"log"
"os"
)
func ExampleWalkDir() {
root := "/usr/local/go/bin"
fileSystem := os.DirFS(root)
fs.WalkDir(fileSystem, ".", func(path string, d fs.DirEntry, err error) error {
if err != nil {
log.Fatal(err)
}
fmt.Println(path)
return nil
})
}