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Move object-related methods in plumbing.Repository into a separate file
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package plumbing | ||
|
|
||
| import ( | ||
| "compress/zlib" | ||
| "errors" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/kourge/ggit/core" | ||
| "github.com/kourge/ggit/format" | ||
| ) | ||
|
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||
| var ( | ||
| ErrObjectNotFoundInRepo = errors.New("object not found in repository") | ||
| ) | ||
|
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| // ObjectBySha1 returns an Object with the given Sha1. First, the object is | ||
| // searched amongst loose objects. If it is not found there, then all pack files | ||
| // are searched in order. By now if it is stil not found, the error | ||
| // ErrObjectNotFoundInRepo is returned. | ||
| func (repo *Repository) ObjectBySha1(hash core.Sha1) (core.Object, error) { | ||
| object, err := repo.LooseObjectBySha1(hash) | ||
| if err == nil { | ||
| return object, nil | ||
| } else if err != ErrObjectNotFoundInRepo { | ||
| return nil, err | ||
| } | ||
|
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| return repo.PackedObjectBySha1(hash) | ||
| } | ||
|
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| // LooseObjectBySha1 returns an Object with the given Sha1. If the object in | ||
| // question is packed or does not exist, the error ErrObjectNotFoundInRepo is | ||
| // returned. | ||
| func (repo *Repository) LooseObjectBySha1(hash core.Sha1) (core.Object, error) { | ||
| prefix, rest := hash.Split(2) | ||
| path := filepath.Join(repo.path, "objects", prefix, rest) | ||
|
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| file, err := os.Open(path) | ||
| if os.IsNotExist(err) { | ||
| return nil, ErrObjectNotFoundInRepo | ||
| } else if err != nil { | ||
| return nil, err | ||
| } | ||
| defer file.Close() | ||
|
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||
| r, err := zlib.NewReader(file) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| stream := &core.Stream{} | ||
| if err := stream.Decode(r); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| return stream.Object(), nil | ||
| } | ||
|
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| // PackedObjectBySha1 returns an Object with the given Sha1. If the object in | ||
| // question is loose or does not exist, the error ErrObjectNotFoundInRepo is | ||
| // returned. | ||
| func (repo *Repository) PackedObjectBySha1(hash core.Sha1) (core.Object, error) { | ||
| for _, pack := range repo.Packs() { | ||
| if err := pack.Open(); err != nil { | ||
| return nil, err | ||
| } | ||
| defer pack.Close() | ||
|
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||
| if object, err := pack.ObjectBySha1(hash); err == format.ErrObjectNotFoundInPack { | ||
| continue | ||
| } else if err != nil { | ||
| return nil, err | ||
| } else { | ||
| return object, nil | ||
| } | ||
| } | ||
|
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| return nil, ErrObjectNotFoundInRepo | ||
| } |