revlog

package
v0.0.0-...-a6d3b49 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Oct 19, 2015 License: BSD-3-Clause, BSD-3-Clause Imports: 13 Imported by: 0

README 

Revlog NG == version 1 (since Mercurial 0.9)

revision index: file extension .i

Two storage types:

-	each revision record is followed by patch data
	(next revision record starts after that data)

	This is for rather small files.

-	patch data corresponding to revisions are stored externally,
	in a file with same base name (stem), but extension `.d'

Index record format is described at http://mercurial.selenic.com/wiki/RevlogNG

A data chunk starts either with

	u	uncompressed, skip 1 byte (the `u')

	0	uncompressed, dont skip

or
	x	zlib compressed

A data chunk consists of a collection of hunks, each starting
with three 4-byte values: start, end, length, followed by
the data.


/home/micha/ib/wmipf.de/home/ib/mercurial/mercurial/revlog.py

Documentation

Overview

Package revlog provides read access to RevlogNG files.

Index

Constants

This section is empty.

Variables

View Source 
var ErrRevNotFound = errors.New("revision not found")
View Source 
var ErrRevisionAmbiguous = errors.New("hg/revlog: ambiguous revision spec")
View Source 
var ErrRevisionNotFound = errors.New("hg/revlog: revision not found")

Functions

This section is empty.

Types

type DataCache 

type DataCache interface {
	Get(int) []byte
	Store(int, []byte)
}

type DataHelper 

type DataHelper interface {
	Open(string) (DataReadCloser, error)
	TmpBuffer() *bytes.Buffer
}

type DataReadCloser 

type DataReadCloser interface {
	io.ReaderAt
	io.Closer
}

type FileBuilder 

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

func NewFileBuilder 

func NewFileBuilder() (p *FileBuilder)

func (*FileBuilder) Build 

func (p *FileBuilder) Build(r *Rec) (file []byte, err error)

func (*FileBuilder) BuildWrite 

func (p *FileBuilder) BuildWrite(w io.Writer, r *Rec) (err error)

func (*FileBuilder) Bytes 

func (p *FileBuilder) Bytes() []byte

func (*FileBuilder) CloseData 

func (p *FileBuilder) CloseData() (err error)

func (*FileBuilder) KeepDataOpen 

func (p *FileBuilder) KeepDataOpen()

func (*FileBuilder) PreparePatch 

func (p *FileBuilder) PreparePatch(r *Rec) (f *FilePatch, err error)

func (*FileBuilder) SetDataCache 

func (p *FileBuilder) SetDataCache(dc DataCache)

type FilePatch 

type FilePatch struct {
	MetaData []byte
	MetaSkip int
	// contains filtered or unexported fields
}

func (*FilePatch) Apply 

func (p *FilePatch) Apply(w io.Writer) (err error)

type FileRevSpec 

type FileRevSpec int

func (FileRevSpec) Lookup 

func (n FileRevSpec) Lookup(i *Index) (r *Rec, err error)

type Index 

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

func Open 

func Open(name Name) (rlog *Index, err error)

func (*Index) Dump 

func (rv *Index) Dump(w io.Writer)

func (Index) NewHash 

func (id Index) NewHash() hash.Hash

func (Index) NewNodeId 

func (id Index) NewNodeId(b []byte) NodeId

func (*Index) Null 

func (i *Index) Null() *Rec

func (*Index) Record 

func (rv *Index) Record(i int) *Rec

func (*Index) Tip 

func (i *Index) Tip() *Rec

type LinkRevSpec 

type LinkRevSpec struct {
	Rev int

	// FindPresent should examine maybeAncestors' Linkrev values to
	// find a changelog record that is an ancestor of Rev. It also has to
	// make sure that the file actually existed in the revision specified
	// by Rev.
	// If FindPresent is nil (the default), Lookup will -- in case of multiple
	// matching branches -- return the last visited record, or a Null record
	// if no revision matches at all.
	FindPresent func(maybeAncestors []*Rec) (index int, err error)
}

A LinkRevSpec can be used to find a file revision that was present at a certain changelog revision, by examining the filelog records' linkrev values. The behaviour of the Lookup method can be configured by setting FindPresent to a user implemented function.

func NewLinkRevSpec 

func NewLinkRevSpec(rev int) *LinkRevSpec

func (LinkRevSpec) Lookup 

func (l LinkRevSpec) Lookup(i *Index) (match *Rec, err error)

type Name 

type Name interface {
	Index() string
	Data() string
}

type NodeId 

type NodeId []byte

func NewId 

func NewId(hash string) (id NodeId, err error)

func (NodeId) Eq 

func (i NodeId) Eq(i2 NodeId) bool

func (NodeId) Node 

func (i NodeId) Node() string

func (NodeId) String 

func (i NodeId) String() string

type NodeIdImpl 

type NodeIdImpl interface {
	NewHash() hash.Hash
	NewNodeId([]byte) NodeId
}

type NodeIdRevSpec 

type NodeIdRevSpec string

func (NodeIdRevSpec) Lookup 

func (hash NodeIdRevSpec) Lookup(rv *Index) (r *Rec, err error)

type NullRevSpec 

type NullRevSpec struct{}

func (NullRevSpec) Lookup 

func (NullRevSpec) Lookup(i *Index) (r *Rec, err error)

func (NullRevSpec) String 

func (NullRevSpec) String() string

type Rec 

type Rec struct {
	Index *Index
	// contains filtered or unexported fields
}

func (*Rec) BaseRev 

func (r *Rec) BaseRev() int

func (*Rec) FileRev 

func (r *Rec) FileRev() int

func (*Rec) GetData 

func (r *Rec) GetData(dh DataHelper) (data []byte, err error)

func (*Rec) Id 

func (r *Rec) Id() NodeId

func (*Rec) IsBase 

func (r *Rec) IsBase() bool

func (*Rec) IsDescendant 

func (r *Rec) IsDescendant(rev2 int) (is bool)

IsDescendant follows all branches that originate in r until it passes record rev2. If that record is found to be on one of these branches, it is a descendant of r.

func (*Rec) IsLeaf 

func (r *Rec) IsLeaf() (yes bool)

func (*Rec) IsStartOfBranch 

func (r *Rec) IsStartOfBranch() bool

func (*Rec) Next 

func (r *Rec) Next() *Rec

func (*Rec) Parent 

func (r *Rec) Parent() *Rec

func (*Rec) Parent1NotPrevious 

func (r *Rec) Parent1NotPrevious() bool

func (*Rec) Parent2 

func (r *Rec) Parent2() *Rec

func (*Rec) Parent2Present 

func (r *Rec) Parent2Present() bool

func (*Rec) Prev 

func (r *Rec) Prev() *Rec

type RevisionSpec 

type RevisionSpec interface {
	Lookup(*Index) (*Rec, error)
}

type TipRevSpec 

type TipRevSpec struct{}

func (TipRevSpec) Lookup 

func (TipRevSpec) Lookup(i *Index) (r *Rec, err error)

func (TipRevSpec) String 

func (TipRevSpec) String() string

Source Files

View all Source files

Directories

Path Synopsis
The patch package provides support for calculating and applying revlog patches
 The patch package provides support for calculating and applying revlog patches

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.