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package transactional
import (
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/storer"
)
// ShallowStorage implements the storer.ShallowStorer for the transactional package.
type ShallowStorage struct {
storer.ShallowStorer
temporal storer.ShallowStorer
}
// NewShallowStorage returns a new ShallowStorage based on a base storer and
// a temporal storer.
func NewShallowStorage(base, temporal storer.ShallowStorer) *ShallowStorage {
return &ShallowStorage{
ShallowStorer: base,
temporal: temporal,
}
}
// SetShallow honors the storer.ShallowStorer interface.
func (s *ShallowStorage) SetShallow(commits []plumbing.Hash) error {
return s.temporal.SetShallow(commits)
}
// Shallow honors the storer.ShallowStorer interface.
func (s *ShallowStorage) Shallow() ([]plumbing.Hash, error) {
shallow, err := s.temporal.Shallow()
if err != nil {
return nil, err
}
if len(shallow) != 0 {
return shallow, nil
}
return s.ShallowStorer.Shallow()
}
// Commit it copies the shallow information of the temporal storage into the
// base storage.
func (s *ShallowStorage) Commit() error {
commits, err := s.temporal.Shallow()
if err != nil || len(commits) == 0 {
return err
}
return s.ShallowStorer.SetShallow(commits)
}
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