mirror of
https://github.com/rclone/rclone.git
synced 2024-12-02 05:14:55 +01:00
396 lines
8.2 KiB
Go
396 lines
8.2 KiB
Go
package tree
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import (
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"errors"
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"fmt"
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"io"
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"os"
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"os/user"
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"path/filepath"
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"regexp"
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"sort"
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"strconv"
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"strings"
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)
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// Node represent some node in the tree
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// contains FileInfo, and its childs
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type Node struct {
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os.FileInfo
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path string
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depth int
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err error
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nodes Nodes
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vpaths map[string]bool
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}
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// List of nodes
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type Nodes []*Node
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// To use this package programmatically, you must implement this
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// interface.
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// For example: PTAL on 'cmd/tree/tree.go'
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type Fs interface {
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Stat(path string) (os.FileInfo, error)
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ReadDir(path string) ([]string, error)
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}
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// Options store the configuration for specific tree.
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// Note, that 'Fs', and 'OutFile' are required (OutFile can be os.Stdout).
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type Options struct {
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Fs Fs
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OutFile io.Writer
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// List
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All bool
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DirsOnly bool
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FullPath bool
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IgnoreCase bool
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FollowLink bool
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DeepLevel int
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Pattern string
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IPattern string
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// File
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ByteSize bool
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UnitSize bool
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FileMode bool
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ShowUid bool
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ShowGid bool
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LastMod bool
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Quotes bool
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Inodes bool
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Device bool
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// Sort
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NoSort bool
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VerSort bool
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ModSort bool
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DirSort bool
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NameSort bool
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SizeSort bool
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CTimeSort bool
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ReverSort bool
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// Graphics
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NoIndent bool
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Colorize bool
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}
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// New get path and create new node(root).
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func New(path string) *Node {
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return &Node{path: path, vpaths: make(map[string]bool)}
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}
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// Visit all files under the given node.
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func (node *Node) Visit(opts *Options) (dirs, files int) {
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// visited paths
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if path, err := filepath.Abs(node.path); err == nil {
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path = filepath.Clean(path)
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node.vpaths[path] = true
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}
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// stat
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fi, err := opts.Fs.Stat(node.path)
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if err != nil {
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node.err = err
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return
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}
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node.FileInfo = fi
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if !fi.IsDir() {
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return 0, 1
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}
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// DeepLevel option
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if opts.DeepLevel > 0 && opts.DeepLevel <= node.depth {
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return 1, 0
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}
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names, err := opts.Fs.ReadDir(node.path)
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if err != nil {
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node.err = err
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return
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}
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node.nodes = make(Nodes, 0)
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for _, name := range names {
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// "all" option
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if !opts.All && strings.HasPrefix(name, ".") {
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continue
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}
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nnode := &Node{
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path: filepath.Join(node.path, name),
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depth: node.depth + 1,
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vpaths: node.vpaths,
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}
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d, f := nnode.Visit(opts)
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if nnode.err == nil && !nnode.IsDir() {
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// "dirs only" option
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if opts.DirsOnly {
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continue
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}
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var rePrefix string
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if opts.IgnoreCase {
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rePrefix = "(?i)"
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}
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// Pattern matching
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if opts.Pattern != "" {
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re, err := regexp.Compile(rePrefix + opts.Pattern)
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if err == nil && !re.MatchString(name) {
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continue
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}
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}
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// IPattern matching
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if opts.IPattern != "" {
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re, err := regexp.Compile(rePrefix + opts.IPattern)
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if err == nil && re.MatchString(name) {
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continue
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}
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}
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}
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node.nodes = append(node.nodes, nnode)
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dirs, files = dirs+d, files+f
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}
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// Sorting
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if !opts.NoSort {
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node.sort(opts)
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}
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return dirs + 1, files
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}
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func (node *Node) sort(opts *Options) {
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var fn SortFunc
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switch {
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case opts.ModSort:
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fn = ModSort
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case opts.CTimeSort:
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fn = CTimeSort
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case opts.DirSort:
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fn = DirSort
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case opts.VerSort:
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fn = VerSort
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case opts.SizeSort:
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fn = SizeSort
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case opts.NameSort:
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fn = NameSort
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default:
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fn = NameSort // Default should be sorted, not unsorted.
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}
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if fn != nil {
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if opts.ReverSort {
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sort.Sort(sort.Reverse(ByFunc{node.nodes, fn}))
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} else {
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sort.Sort(ByFunc{node.nodes, fn})
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}
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}
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}
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// Print nodes based on the given configuration.
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func (node *Node) Print(opts *Options) { node.print("", opts) }
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func dirRecursiveSize(opts *Options, node *Node) (size int64, err error) {
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if opts.DeepLevel > 0 && node.depth >= opts.DeepLevel {
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err = errors.New("Depth too high")
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}
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for _, nnode := range node.nodes {
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if nnode.err != nil {
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err = nnode.err
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continue
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}
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if !nnode.IsDir() {
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size += nnode.Size()
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} else {
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nsize, e := dirRecursiveSize(opts, nnode)
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size += nsize
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if e != nil {
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err = e
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}
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}
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}
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return
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}
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func (node *Node) print(indent string, opts *Options) {
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if node.err != nil {
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err := node.err.Error()
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if msgs := strings.Split(err, ": "); len(msgs) > 1 {
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err = msgs[1]
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}
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fmt.Printf("%s [%s]\n", node.path, err)
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return
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}
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if !node.IsDir() {
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var props []string
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ok, inode, device, uid, gid := getStat(node)
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// inodes
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if ok && opts.Inodes {
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props = append(props, fmt.Sprintf("%d", inode))
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}
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// device
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if ok && opts.Device {
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props = append(props, fmt.Sprintf("%3d", device))
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}
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// Mode
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if opts.FileMode {
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props = append(props, node.Mode().String())
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}
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// Owner/Uid
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if ok && opts.ShowUid {
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uidStr := strconv.Itoa(int(uid))
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if u, err := user.LookupId(uidStr); err != nil {
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props = append(props, fmt.Sprintf("%-8s", uidStr))
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} else {
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props = append(props, fmt.Sprintf("%-8s", u.Username))
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}
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}
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// Gorup/Gid
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// TODO: support groupname
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if ok && opts.ShowGid {
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gidStr := strconv.Itoa(int(gid))
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props = append(props, fmt.Sprintf("%-4s", gidStr))
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}
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// Size
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if opts.ByteSize || opts.UnitSize {
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var size string
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if opts.UnitSize {
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size = fmt.Sprintf("%4s", formatBytes(node.Size()))
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} else {
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size = fmt.Sprintf("%11d", node.Size())
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}
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props = append(props, size)
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}
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// Last modification
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if opts.LastMod {
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props = append(props, node.ModTime().Format("Jan 02 15:04"))
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}
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// Print properties
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if len(props) > 0 {
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fmt.Fprintf(opts.OutFile, "[%s] ", strings.Join(props, " "))
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}
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} else {
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var props []string
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// Size
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if opts.ByteSize || opts.UnitSize {
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var size string
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rsize, err := dirRecursiveSize(opts, node)
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if err != nil && rsize <= 0 {
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if opts.UnitSize {
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size = "????"
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} else {
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size = "???????????"
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}
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} else if opts.UnitSize {
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size = fmt.Sprintf("%4s", formatBytes(rsize))
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} else {
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size = fmt.Sprintf("%11d", rsize)
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}
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props = append(props, size)
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}
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// Print properties
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if len(props) > 0 {
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fmt.Fprintf(opts.OutFile, "[%s] ", strings.Join(props, " "))
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}
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}
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// name/path
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var name string
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if node.depth == 0 || opts.FullPath {
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name = node.path
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} else {
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name = node.Name()
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}
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// Quotes
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if opts.Quotes {
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name = fmt.Sprintf("\"%s\"", name)
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}
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// Colorize
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if opts.Colorize {
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name = ANSIColor(node, name)
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}
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// IsSymlink
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if node.Mode()&os.ModeSymlink == os.ModeSymlink {
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vtarget, err := os.Readlink(node.path)
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if err != nil {
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vtarget = node.path
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}
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targetPath, err := filepath.EvalSymlinks(node.path)
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if err != nil {
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targetPath = vtarget
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}
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fi, err := opts.Fs.Stat(targetPath)
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if opts.Colorize && fi != nil {
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vtarget = ANSIColor(&Node{FileInfo: fi, path: vtarget}, vtarget)
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}
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name = fmt.Sprintf("%s -> %s", name, vtarget)
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// Follow symbolic links like directories
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if opts.FollowLink {
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path, err := filepath.Abs(targetPath)
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if err == nil && fi != nil && fi.IsDir() {
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if _, ok := node.vpaths[filepath.Clean(path)]; !ok {
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inf := &Node{FileInfo: fi, path: targetPath}
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inf.vpaths = node.vpaths
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inf.Visit(opts)
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node.nodes = inf.nodes
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} else {
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name += " [recursive, not followed]"
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}
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}
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}
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}
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// Print file details
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// the main idea of the print logic came from here: github.com/campoy/tools/tree
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fmt.Fprintln(opts.OutFile, name)
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add := "│ "
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for i, nnode := range node.nodes {
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if opts.NoIndent {
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add = ""
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} else {
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if i == len(node.nodes)-1 {
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fmt.Fprintf(opts.OutFile, indent+"└── ")
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add = " "
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} else {
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fmt.Fprintf(opts.OutFile, indent+"├── ")
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}
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}
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nnode.print(indent+add, opts)
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}
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}
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const (
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_ = iota // ignore first value by assigning to blank identifier
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KB int64 = 1 << (10 * iota)
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MB
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GB
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TB
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PB
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EB
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)
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// Convert bytes to human readable string. Like a 2 MB, 64.2 KB, 52 B
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func formatBytes(i int64) (result string) {
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var n float64
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sFmt, eFmt := "%.01f", ""
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switch {
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case i > EB:
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eFmt = "E"
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n = float64(i) / float64(EB)
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case i > PB:
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eFmt = "P"
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n = float64(i) / float64(PB)
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case i > TB:
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eFmt = "T"
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n = float64(i) / float64(TB)
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case i > GB:
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eFmt = "G"
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n = float64(i) / float64(GB)
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case i > MB:
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eFmt = "M"
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n = float64(i) / float64(MB)
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case i > KB:
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eFmt = "K"
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n = float64(i) / float64(KB)
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default:
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sFmt = "%.0f"
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n = float64(i)
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}
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if eFmt != "" && n >= 10 {
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sFmt = "%.0f"
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}
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result = fmt.Sprintf(sFmt+eFmt, n)
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result = strings.Trim(result, " ")
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return
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}
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