github.com/goproxy0/go@v0.0.0-20171111080102-49cc0c489d2c/src/path/filepath/example_unix_test.go (about)

     1  // Copyright 2013 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build !windows,!plan9
     6  
     7  package filepath_test
     8  
     9  import (
    10  	"fmt"
    11  	"os"
    12  	"path/filepath"
    13  )
    14  
    15  func ExampleSplitList() {
    16  	fmt.Println("On Unix:", filepath.SplitList("/a/b/c:/usr/bin"))
    17  	// Output:
    18  	// On Unix: [/a/b/c /usr/bin]
    19  }
    20  
    21  func ExampleRel() {
    22  	paths := []string{
    23  		"/a/b/c",
    24  		"/b/c",
    25  		"./b/c",
    26  	}
    27  	base := "/a"
    28  
    29  	fmt.Println("On Unix:")
    30  	for _, p := range paths {
    31  		rel, err := filepath.Rel(base, p)
    32  		fmt.Printf("%q: %q %v\n", p, rel, err)
    33  	}
    34  
    35  	// Output:
    36  	// On Unix:
    37  	// "/a/b/c": "b/c" <nil>
    38  	// "/b/c": "../b/c" <nil>
    39  	// "./b/c": "" Rel: can't make ./b/c relative to /a
    40  }
    41  
    42  func ExampleSplit() {
    43  	paths := []string{
    44  		"/home/arnie/amelia.jpg",
    45  		"/mnt/photos/",
    46  		"rabbit.jpg",
    47  		"/usr/local//go",
    48  	}
    49  	fmt.Println("On Unix:")
    50  	for _, p := range paths {
    51  		dir, file := filepath.Split(p)
    52  		fmt.Printf("input: %q\n\tdir: %q\n\tfile: %q\n", p, dir, file)
    53  	}
    54  	// Output:
    55  	// On Unix:
    56  	// input: "/home/arnie/amelia.jpg"
    57  	// 	dir: "/home/arnie/"
    58  	// 	file: "amelia.jpg"
    59  	// input: "/mnt/photos/"
    60  	// 	dir: "/mnt/photos/"
    61  	// 	file: ""
    62  	// input: "rabbit.jpg"
    63  	// 	dir: ""
    64  	// 	file: "rabbit.jpg"
    65  	// input: "/usr/local//go"
    66  	// 	dir: "/usr/local//"
    67  	// 	file: "go"
    68  }
    69  
    70  func ExampleJoin() {
    71  	fmt.Println("On Unix:")
    72  	fmt.Println(filepath.Join("a", "b", "c"))
    73  	fmt.Println(filepath.Join("a", "b/c"))
    74  	fmt.Println(filepath.Join("a/b", "c"))
    75  	fmt.Println(filepath.Join("a/b", "/c"))
    76  	// Output:
    77  	// On Unix:
    78  	// a/b/c
    79  	// a/b/c
    80  	// a/b/c
    81  	// a/b/c
    82  }
    83  func ExampleWalk() {
    84  	dir := "dir/to/walk"
    85  	subDirToSkip := "skip" // dir/to/walk/skip
    86  
    87  	err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
    88  		if err != nil {
    89  			fmt.Printf("prevent panic by handling failure accessing a path %q: %v\n", dir, err)
    90  			return err
    91  		}
    92  		if info.IsDir() && info.Name() == subDirToSkip {
    93  			fmt.Printf("skipping a dir without errors: %+v \n", info.Name())
    94  			return filepath.SkipDir
    95  		}
    96  		fmt.Printf("visited file: %q\n", path)
    97  		return nil
    98  	})
    99  
   100  	if err != nil {
   101  		fmt.Printf("error walking the path %q: %v\n", dir, err)
   102  	}
   103  }