src/path/filepath/example_unix_test.go

// Copyright 2013 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.

// +build !windows,!plan9

package filepath_test

import (
	"fmt"
	"os"
	"path/filepath"
)

func ExampleSplitList() {
	fmt.Println("On Unix:", filepath.SplitList("/a/b/c:/usr/bin"))
	// Output:
	// On Unix: [/a/b/c /usr/bin]
}

func ExampleRel() {
	paths := []string{
		"/a/b/c",
		"/b/c",
		"./b/c",
	}
	base := "/a"

	fmt.Println("On Unix:")
	for _, p := range paths {
		rel, err := filepath.Rel(base, p)
		fmt.Printf("%q: %q %v\n", p, rel, err)
	}

	// Output:
	// On Unix:
	// "/a/b/c": "b/c" <nil>
	// "/b/c": "../b/c" <nil>
	// "./b/c": "" Rel: can't make ./b/c relative to /a
}

func ExampleSplit() {
	paths := []string{
		"/home/arnie/amelia.jpg",
		"/mnt/photos/",
		"rabbit.jpg",
		"/usr/local//go",
	}
	fmt.Println("On Unix:")
	for _, p := range paths {
		dir, file := filepath.Split(p)
		fmt.Printf("input: %q\n\tdir: %q\n\tfile: %q\n", p, dir, file)
	}
	// Output:
	// On Unix:
	// input: "/home/arnie/amelia.jpg"
	// 	dir: "/home/arnie/"
	// 	file: "amelia.jpg"
	// input: "/mnt/photos/"
	// 	dir: "/mnt/photos/"
	// 	file: ""
	// input: "rabbit.jpg"
	// 	dir: ""
	// 	file: "rabbit.jpg"
	// input: "/usr/local//go"
	// 	dir: "/usr/local//"
	// 	file: "go"
}

func ExampleJoin() {
	fmt.Println("On Unix:")
	fmt.Println(filepath.Join("a", "b", "c"))
	fmt.Println(filepath.Join("a", "b/c"))
	fmt.Println(filepath.Join("a/b", "c"))
	fmt.Println(filepath.Join("a/b", "/c"))
	// Output:
	// On Unix:
	// a/b/c
	// a/b/c
	// a/b/c
	// a/b/c
}

func ExampleWalk() {
	dir := "dir/to/walk"
	subDirToSkip := "skip" // dir/to/walk/skip

	err := filepath.Walk(dir, func(path string, info os.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: %q\n", path)
		return nil
	})

	if err != nil {
		fmt.Printf("error walking the path %q: %v\n", dir, err)
	}
}