func (repo *DiskRepository) PackedRefs() ([]objects.Ref, error) {
if repo.packedRefs == nil {
file, e := relativeFile(repo, PackedRefsFile)
if e != nil {
return nil, e
}
defer file.Close()
p := parse.NewRefParser(bufio.NewReader(file), "")
var refs []objects.Ref
if refs, e = p.ParsePackedRefs(); e != nil {
return nil, e
}
repo.packedRefs = refs
}
return repo.packedRefs, nil
}
// Ref is a repository-based baseline method for getting refs. The
// ref spec is the full path of the ref that is relative to the .git
// directory.
//
// This will attempt to open the file pointed to by the spec. If this
// file is unavailable, packed refs are loaded into memory (and cached)
// and it attempts to find the ref there.
//
// For smart disambiguation of refs, or ref peeling, thou shalt
// use helper operations.
func (repo *DiskRepository) Ref(spec string) (objects.Ref, error) {
file, e := relativeFile(repo, spec)
if e == nil {
defer file.Close()
p := parse.NewRefParser(bufio.NewReader(file), spec)
return p.ParseRef()
}
if os.IsNotExist(e) {
refs, err := repo.PackedRefs()
if err != nil {
return nil, noSuchRefErrf(spec)
}
for _, r := range refs {
if r.Name() == spec {
return r, nil
}
}
return nil, noSuchRefErrf(spec)
}
return nil, e
}