func walk(path string, d *os.Dir, v Visitor, errors chan<- os.Error) {
if !d.IsDirectory() {
v.VisitFile(path, d)
return
}
if !v.VisitDir(path, d) {
return // skip directory entries
}
list, err := io.ReadDir(path)
if err != nil {
if errors != nil {
errors <- err
}
}
for _, e := range list {
walk(Join(path, e.Name), e, v, errors)
}
}
func isPkgDir(dir *os.Dir) bool {
return dir.IsDirectory() && len(dir.Name) > 0 && dir.Name[0] != '_'
}