|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "flag" |
| 5 | + "fmt" |
| 6 | + "io/fs" |
| 7 | + "os" |
| 8 | + "path" |
| 9 | + "sync" |
| 10 | + "sync/atomic" |
| 11 | + |
| 12 | + "github.com/GoToUse/treeprint" |
| 13 | +) |
| 14 | + |
| 15 | +// 存储大小之间的单位 |
| 16 | +const unit = 1024 |
| 17 | + |
| 18 | +// command line arguments |
| 19 | +var flag_folder_path string |
| 20 | + |
| 21 | +// global variable |
| 22 | +var te = treeprint.New() |
| 23 | + |
| 24 | +func calc(entry fs.DirEntry, wg *sync.WaitGroup, folder string, total *int64, tree treeprint.Tree) { |
| 25 | + defer wg.Done() |
| 26 | + |
| 27 | + if entry.IsDir() { |
| 28 | + size, err := Parallel(path.Join(folder, entry.Name()), tree) |
| 29 | + if err != nil { |
| 30 | + panic(err) |
| 31 | + } |
| 32 | + atomic.AddInt64(total, size) |
| 33 | + return |
| 34 | + } |
| 35 | + |
| 36 | + info, err := entry.Info() |
| 37 | + if err != nil { |
| 38 | + panic(err) |
| 39 | + } |
| 40 | + |
| 41 | + size := info.Size() |
| 42 | + atomic.AddInt64(total, size) |
| 43 | + tree.AddNode(fmt.Sprintf("%s (%s)", path.Base(entry.Name()), ByteCountIEC(size))) |
| 44 | +} |
| 45 | + |
| 46 | +// Parallel execution, fast enough |
| 47 | +func Parallel(folder string, tree treeprint.Tree) (total int64, e error) { |
| 48 | + var wg sync.WaitGroup |
| 49 | + entrys, err := os.ReadDir(folder) |
| 50 | + // 不记录子目录的大小 |
| 51 | + branch := tree.AddBranch(path.Base(folder)) |
| 52 | + |
| 53 | + // catch panic |
| 54 | + defer func() { |
| 55 | + if err := recover(); err != nil { |
| 56 | + e = fmt.Errorf("%v", err) |
| 57 | + } |
| 58 | + }() |
| 59 | + |
| 60 | + if err != nil { |
| 61 | + return 0, err |
| 62 | + } |
| 63 | + |
| 64 | + entrysLen := len(entrys) |
| 65 | + |
| 66 | + if entrysLen == 0 { |
| 67 | + return 0, nil |
| 68 | + } |
| 69 | + |
| 70 | + wg.Add(entrysLen) |
| 71 | + |
| 72 | + for i := 0; i < entrysLen; i++ { |
| 73 | + go calc(entrys[i], &wg, folder, &total, branch) |
| 74 | + } |
| 75 | + |
| 76 | + wg.Wait() |
| 77 | + return total, nil |
| 78 | +} |
| 79 | + |
| 80 | +// ByteCountIEC, 以1024作为基数, 将字节转为对应的KB等单位 |
| 81 | +func ByteCountIEC(b int64) string { |
| 82 | + if b < unit { |
| 83 | + return fmt.Sprintf("%d B", b) |
| 84 | + } |
| 85 | + div, exp := int64(unit), 0 |
| 86 | + for n := b / unit; n >= unit; n /= unit { |
| 87 | + div *= unit |
| 88 | + exp++ |
| 89 | + } |
| 90 | + return fmt.Sprintf("%.1f%ciB", |
| 91 | + float64(b)/float64(div), "KMGTPE"[exp]) |
| 92 | +} |
| 93 | + |
| 94 | +func init() { |
| 95 | + flag.StringVar(&flag_folder_path, "f", ".", "Folder path.") |
| 96 | + flag.Parse() |
| 97 | +} |
| 98 | + |
| 99 | +func main() { |
| 100 | + size, err := Parallel(flag_folder_path, te) |
| 101 | + if err != nil { |
| 102 | + panic(err) |
| 103 | + } |
| 104 | + |
| 105 | + for _, d := range []string{fmt.Sprintf("Total size: %s", ByteCountIEC(size)), "Output in tree format:", te.String()} { |
| 106 | + fmt.Println(d) |
| 107 | + } |
| 108 | +} |
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