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package packr
import (
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
)
type WalkFunc func(string, File) error
// Walk will traverse the box and call the WalkFunc for each file in the box/folder.
func (b Box) Walk(wf WalkFunc) error {
if data[b.Path] == nil {
base, err := filepath.EvalSymlinks(filepath.Join(b.callingDir, b.Path))
if err != nil {
return errors.WithStack(err)
}
return filepath.Walk(base, func(path string, info os.FileInfo, err error) error {
cleanName, err := filepath.Rel(base, path)
if err != nil {
cleanName = strings.TrimPrefix(path, base)
}
cleanName = filepath.ToSlash(filepath.Clean(cleanName))
cleanName = strings.TrimPrefix(cleanName, "/")
cleanName = filepath.FromSlash(cleanName)
if info == nil || info.IsDir() {
return nil
}
file, err := fileFor(path, cleanName)
if err != nil {
return err
}
return wf(cleanName, file)
})
}
for n := range data[b.Path] {
f, err := b.find(n)
if err != nil {
return err
}
err = wf(n, f)
if err != nil {
return err
}
}
return nil
}
// WalkPrefix will call box.Walk and call the WalkFunc when it finds paths that have a matching prefix
func (b Box) WalkPrefix(prefix string, wf WalkFunc) error {
opre := osPath(prefix)
return b.Walk(func(path string, f File) error {
if strings.HasPrefix(osPath(path), opre) {
if err := wf(path, f); err != nil {
return errors.WithStack(err)
}
}
return nil
})
}
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