pack

package
v0.0.17 Latest Latest
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 Go to latest Published: May 1, 2023 License: MIT Imports: 15 Imported by: 0

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Index

Constants

View Source 
const (
	MagicNumberIdxV2 = 0xff744f63 // aka `\xfftOc`
)

定义魔数

Variables

This section is empty.

Functions

func ReadGitVLQ 

func ReadGitVLQ(in io.Reader) (int64, error)

ReadGitVLQ ... 读取 git 格式的变长整数

func ReadSimple7bitsInt 

func ReadSimple7bitsInt(in io.Reader) (int64, error)

ReadSimple7bitsInt ... 读取 git 格式的变长整数

Types

type CheckFlag 

type CheckFlag int

CheckFlag 表示检查标志位, 多个标志位可以通过'|'运算符组合 

const (
	CheckSize CheckFlag = 0x0008 // 检查文件的大小
	CheckSum  CheckFlag = 0x0004 // 检查文件的 hash-sum
	CheckHead CheckFlag = 0x0002 // 检查文件的头部

	CheckAll CheckFlag = 0xffff // 进行全面的检查
)

定义各种检查标志位, 多个标志位可以通过'|'运算符组合

type ComplexPack added in v0.0.13 

type ComplexPack interface {
	Pack

	// 打开 in-pack 对象读者，如果是 delta 对象，执行重建
	OpenComplexObjectReader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, io.ReadCloser, error)

	// 读取 in-pack 对象头，如果是 delta 对象，执行重建
	ReadComplexObjectHeader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, error)

	// 生成 .idx 文件
	MakeIdx(idxFile afs.Path) error
}

ComplexPack 表示一个 pack-*.pack 文件, 支持对象重建

func NewComplexPack added in v0.0.13 

func NewComplexPack(file *File) (ComplexPack, error)

NewComplexPack ...

type DeltaInstruction added in v0.0.13 

type DeltaInstruction struct {
	Code   DeltaInstructionCode
	Offset uint32
	Size   uint32
	Data   []byte
}

DeltaInstruction 表示一条 delta 指令

type DeltaInstructionCode added in v0.0.13 

type DeltaInstructionCode int

DeltaInstructionCode ... 

const (
	InstructionCopyFromBase DeltaInstructionCode = 1
	InstructionAddNewData   DeltaInstructionCode = 2
)

定义pack-delta的指令

type EntityFile 

type EntityFile struct {
	// contains filtered or unexported fields
}

EntityFile ...

func (*EntityFile) Check 

func (inst *EntityFile) Check(flags CheckFlag) error

Check ...

func (*EntityFile) GetPackID 

func (inst *EntityFile) GetPackID() git.PackID

GetPackID ...

func (*EntityFile) IndexToHeader added in v0.0.13 

func (inst *EntityFile) IndexToHeader(src *git.PackIndexItem) *git.PackedObjectHeaderEx

IndexToHeader ...

func (*EntityFile) Init 

func (inst *EntityFile) Init(file *File) error

Init ...

func (*EntityFile) Load 

func (inst *EntityFile) Load() error

Load ...

func (*EntityFile) OpenObjectReader 

func (inst *EntityFile) OpenObjectReader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, io.ReadCloser, error)

OpenObjectReader ...

func (*EntityFile) OpenSimpleObjectReader added in v0.0.13 

func (inst *EntityFile) OpenSimpleObjectReader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, io.ReadCloser, error)

OpenSimpleObjectReader ...

func (*EntityFile) ReadObjectHeader 

func (inst *EntityFile) ReadObjectHeader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, error)

ReadObjectHeader ...

func (*EntityFile) ReadSimpleObjectHeader added in v0.0.13 

func (inst *EntityFile) ReadSimpleObjectHeader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, error)

ReadSimpleObjectHeader ...

func (*EntityFile) Reload 

func (inst *EntityFile) Reload() error

Reload ...

func (*EntityFile) Scan added in v0.0.13 

func (inst *EntityFile) Scan() ([]*git.PackedObjectHeaderEx, error)

Scan ...

type File 

type File struct {
	Context *objects.PackContext
	Type    FileType
	Path    afs.Path
}

File ...

func (*File) Clone 

func (inst *File) Clone() *File

Clone ...

func (*File) OpenReader 

func (inst *File) OpenReader() (io.ReadSeekCloser, error)

OpenReader ...

type FileType 

type FileType string

FileType 表示pack文件的类型 

const (
	FileTypeIdx            FileType = ".idx"
	FileTypePack           FileType = ".pack"
	FileTypeRev            FileType = ".rev"
	FileTypeMtimes         FileType = ".mtimes"
	FileTypeMultiPackIndex FileType = "multi-pack-index"
)

定义各种pack文件的类型

type Idx 

type Idx interface {
	Load() error
	Reload() error
	Check(flags CheckFlag) error
	GetPackID() git.PackID
	Find(oid git.ObjectID) (*git.PackIndexItem, error)
	Count() int64
	GetItem(index int64) (*git.PackIndexItem, error)
	GetItems(index int64, limit int) ([]*git.PackIndexItem, error)
}

Idx 表示一个 pack-*.idx 文件

func NewIdx 

func NewIdx(file *File) (Idx, error)

NewIdx ...

type IdxBuilder added in v0.0.13 

type IdxBuilder interface {
	AddItem(item *git.PackedObjectHeaderEx) error
	Make(dst afs.Path) error
}

IdxBuilder ...

type Pack 

type Pack interface {
	Load() error
	Reload() error
	Check(flags CheckFlag) error
	GetPackID() git.PackID
	Scan() ([]*git.PackedObjectHeaderEx, error)

	OpenSimpleObjectReader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, io.ReadCloser, error)
	ReadSimpleObjectHeader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, error)

	// 如果 pool 参数为 nil, 则使用内部的 pool 提供数据来源
	OpenObjectReader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, io.ReadCloser, error)

	// 如果 pool 参数为 nil, 则使用内部的 pool 提供数据来源
	ReadObjectHeader(item *git.PackedObjectHeaderEx, pool afs.ReaderPool) (*git.PackedObjectHeaderEx, error)

	// 把 PackIndexItem 转换为 PackedObjectHeaderEx
	IndexToHeader(item *git.PackIndexItem) *git.PackedObjectHeaderEx
}

Pack 表示一个 pack-*.pack 文件

func NewPack 

func NewPack(file *File) (Pack, error)

NewPack ...

Source Files

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