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package hdfs
import (
"os"
"path/filepath"
"sort"
)
// Walk walks the file tree rooted at root, calling walkFn for each file or
// directory in the tree, including root. All errors that arise visiting files
// and directories are filtered by walkFn. The files are walked in lexical
// order, which makes the output deterministic but means that for very large
// directories Walk can be inefficient. Walk does not follow symbolic links.
func (c *Client) Walk(root string, walkFn filepath.WalkFunc) error {
return c.walk(root, walkFn)
}
func (c *Client) walk(path string, walkFn filepath.WalkFunc) error {
file, err := c.Open(path)
var info os.FileInfo
if file != nil {
info = file.Stat()
}
err = walkFn(path, info, err)
if err != nil {
if info.IsDir() && err == filepath.SkipDir {
return nil
}
return err
}
if info == nil || !info.IsDir() {
return nil
}
names, err := file.Readdirnames(0)
if err != nil {
return walkFn(path, info, err)
}
sort.Strings(names)
for _, name := range names {
err = c.walk(filepath.ToSlash(filepath.Join(path, name)), walkFn)
if err != nil {
return err
}
}
return nil
}
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