Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/path/filepath/example_unix_walk_test.go b/src/path/filepath/example_unix_walk_test.go
new file mode 100644
index 0000000..86146db
--- /dev/null
+++ b/src/path/filepath/example_unix_walk_test.go
@@ -0,0 +1,66 @@
+// 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
+}