Adjust callback to support continuing or stopping at current depth

This commit is contained in:
Dane Everitt 2020-04-18 18:51:19 -07:00
parent 9dcf06d106
commit 3bca54655b
No known key found for this signature in database
GPG Key ID: EEA66103B3D71F53
3 changed files with 19 additions and 6 deletions

View File

@ -155,8 +155,13 @@ func (fs *Filesystem) DirectorySize(dir string) (int64, error) {
ctx := context.Background()
var size int64
err := w.Walk(dir, ctx, func(f os.FileInfo) {
atomic.AddInt64(&size, f.Size())
err := w.Walk(dir, ctx, func(f os.FileInfo) bool {
// Only increment the size when we're dealing with a file specifically, otherwise
// just continue digging deeper until there are no more directories to iterate over.
if !f.IsDir() {
atomic.AddInt64(&size, f.Size())
}
return true
})
return size, err

View File

@ -20,7 +20,7 @@ func (fs *Filesystem) NewWalker() *FileWalker {
// Iterate over all of the files and directories within a given directory. When a file is
// found the callback will be called with the file information. If a directory is encountered
// it will be recursively passed back through to this function.
func (fw *FileWalker) Walk(dir string, ctx context.Context, callback func (os.FileInfo)) error {
func (fw *FileWalker) Walk(dir string, ctx context.Context, callback func (os.FileInfo) bool) error {
cleaned, err := fw.SafePath(dir)
if err != nil {
return err
@ -46,12 +46,20 @@ func (fw *FileWalker) Walk(dir string, ctx context.Context, callback func (os.Fi
case <-ctx.Done():
return ctx.Err()
default:
return fw.Walk(p, ctx, callback)
// If the callback returns true, go ahead and keep walking deeper. This allows
// us to programatically continue deeper into directories, or stop digging
// if that pathway knows it needs nothing else.
if callback(f) {
return fw.Walk(p, ctx, callback)
}
return nil
}
})
} else {
// If this isn't a directory, go ahead and pass the file information into the
// callback.
// callback. We don't care about the response since we won't be stepping into
// anything from here.
callback(f)
}
}