mirror of https://github.com/restic/restic.git
120 lines
2.1 KiB
Go
120 lines
2.1 KiB
Go
package restic
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import (
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"os"
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"path/filepath"
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"github.com/juju/arrar"
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)
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type FilterFunc func(item string, fi os.FileInfo) bool
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type ErrorFunc func(dir string, fi os.FileInfo, err error) error
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type Scanner struct {
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Error ErrorFunc
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Filter FilterFunc
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p *Progress
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}
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func NewScanner(p *Progress) *Scanner {
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sc := &Scanner{p: p}
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// abort on all errors
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sc.Error = func(s string, fi os.FileInfo, err error) error { return err }
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// allow all files
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sc.Filter = func(string, os.FileInfo) bool { return true }
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return sc
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}
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func scan(filterFn FilterFunc, progress *Progress, dir string) (*Tree, error) {
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var err error
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// open and list path
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fd, err := os.Open(dir)
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defer fd.Close()
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if err != nil {
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return nil, err
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}
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entries, err := fd.Readdir(-1)
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if err != nil {
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return nil, err
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}
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// build new tree
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tree := NewTree()
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for _, entry := range entries {
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path := filepath.Join(dir, entry.Name())
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if !filterFn(path, entry) {
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continue
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}
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node, err := NodeFromFileInfo(path, entry)
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if err != nil {
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// TODO: error processing
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return nil, err
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}
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err = tree.Insert(node)
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if err != nil {
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return nil, err
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}
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if entry.IsDir() {
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// save all errors in node.err, sort out later
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node.tree, node.err = scan(filterFn, progress, path)
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}
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}
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for _, node := range tree.Nodes {
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if node.Type == "file" && node.Content != nil {
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continue
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}
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switch node.Type {
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case "file":
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progress.Report(Stat{Files: 1, Bytes: node.Size})
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case "dir":
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progress.Report(Stat{Dirs: 1})
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}
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}
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return tree, nil
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}
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func (sc *Scanner) Scan(path string) (*Tree, error) {
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sc.p.Start()
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defer sc.p.Done()
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fi, err := os.Lstat(path)
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if err != nil {
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return nil, arrar.Annotatef(err, "Lstat(%q)", path)
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}
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node, err := NodeFromFileInfo(path, fi)
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if err != nil {
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return nil, arrar.Annotate(err, "NodeFromFileInfo()")
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}
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tree := NewTree()
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tree.Insert(node)
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if node.Type != "dir" {
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sc.p.Report(Stat{Files: 1, Bytes: node.Size})
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return tree, nil
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}
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sc.p.Report(Stat{Dirs: 1})
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node.tree, err = scan(sc.Filter, sc.p, path)
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if err != nil {
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return nil, arrar.Annotate(err, "loadTree()")
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}
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return tree, nil
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}
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