git

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 Go to latest Published: Jan 27, 2016 License: Apache-2.0, BSD-3-Clause Imports: 24 Imported by: 0

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go-git

Pure-Go implementation of Git as a library.

Origins

This is a fork of gogits/git (which was originally a fork of speedata/gogit). Unfortunately, gogits/git is no longer maintained and is not accepting PRs, so this is a new extension of that work.

shazow/go-git is not backwards-compatible with gogits/git.

Goals

Short term

go-git's API should not be considered stable until these goals have been achieved.

  • Remove features that depend on shelling out to git.
  • Remove redundant features (in progress).
  • Add key features to support implementing sourcegraph/go-vcs's Repository interface. (See shazow/go-vcs#1)
    • Walk tree filesystem
    • Walk commit ancestry
    • Diff
    • Blame
    • Subrepositories
    • Search
Long term
  • Add a storage driver interface for repositories with virtual/in-memory repository support.
  • Improve test coverage.
  • Improve query performance with caching and bitmap indexes.
  • Rework use of locks (probably get rid of them, require consumer to manage repository locking).

Sponsors

Work on this fork is sponsored by Sourcegraph.

License

  • shazow/go-git changes are released under Apache v2.
  • gogits/git (major rewrite of original MIT code) is licensed under Apache v2.
  • speedata/gogit is licensed under MIT.

Documentation

Overview

Package GoGits - Git is a pure Go implementation of Git manipulation.

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrBranchExisted = errors.New("branch has existed")
)
View Source 
var ErrDisjoint = errors.New("commit trees are disjoint")
View Source 
var ErrNoPackedRefs = errors.New("no packed-refs")
View Source 
var ErrNotExist = os.ErrNotExist
View Source 
var (
	IdNotExist = errors.New("sha1 id not exist")
)
View Source 
var (
	SkipCommit = errors.New("skip this commit's ancestry")
)
View Source 
var (
	SkipDir = errors.New("skip this directory")
)
View Source 
var TreeEntryRe = regexp.MustCompile("^([0-9]+) ([^\x00]+)\x00")

Functions

func CreateBranch 

func CreateBranch(repoPath, branchName, id string) error

func CreateRef 

func CreateRef(head, repoPath, branchName, id string) error

func CreateTag 

func CreateTag(repoPath, tagName, id string) error

func IntToStr 

func IntToStr(n int) string

func IsBranchExist 

func IsBranchExist(repoPath, branchName string) bool

func IsNotFound 

func IsNotFound(err error) bool

IsNotFound returns whether the error is about failing to find an object (RefNotFound, ObjectNotFound, etc).

func IsSha1 

func IsSha1(sha1 string) bool

func NewId 

func NewId(b []byte) (sha1, error)

Create a new sha1 from a 20 byte slice.

func NewIdFromString 

func NewIdFromString(s string) (sha1, error)

Create a new sha1 from a Sha1 string of length 40.

func ParseModeType 

func ParseModeType(modeString string) (EntryMode, ObjectType, error)

func PrependObjectHeader 

func PrependObjectHeader(objectType ObjectType, r io.ReadSeeker) (io.Reader, error)

Add '<type> <size>\x00' to beginning of `r`.

func RefEndName 

func RefEndName(refStr string) string

func ScanTreeEntry 

func ScanTreeEntry(
	data []byte,
	atEOF bool,
) (
	advance int, token []byte, err error,
)

func StoreObjectSHA 

func StoreObjectSHA(
	objectType ObjectType,
	w io.Writer,
	r io.ReadSeeker,
) (sha1, error)

Write an the object contents in `r` in compressed form to `w` and return the hash. Special case: if `w` is `ioutil.Discard`, the data is not compressed, since the data is not consumed anywhere.

func StrToInt 

func StrToInt(str string) (int, error)

func UnpackRefs 

func UnpackRefs(repoPath string) error

UnpackRefs unpacks 'packed-refs' to git repository.

Types

type ArchiveType 

type ArchiveType int
const (
	AT_ZIP ArchiveType = iota + 1
	AT_TARGZ
)

type Blob 

type Blob struct {
	*TreeEntry
}

func (*Blob) Data 

func (b *Blob) Data() (io.ReadCloser, error)

type Commit 

type Commit struct {
	Tree
	Id            sha1 // The id of this commit object
	Author        *Signature
	Committer     *Signature
	CommitMessage string
	// contains filtered or unexported fields
}

Commit represents a git commit.

func (*Commit) BehindAhead 

func (c *Commit) BehindAhead(commitId string) (behind int, ahead int, treeErr error)

BehindAhead computes the number of commits are behind (missing) and ahead (extra) of commitId. ErrDisjoint is returned when the two commits don't have a common ancestor, and the length of the tree depth for each.

BehindAhead will traverse the entire ancestry of this commit, then traversing the ancestroy of the target commitId until a common ancestor is found.

TODO: Use a bitmap index for reachability (https://github.com/shazow/go-git/issues/4)

func (*Commit) CreateArchive 

func (c *Commit) CreateArchive(path string, archiveType ArchiveType) error

func (*Commit) IsAncestor 

func (c *Commit) IsAncestor(commitId string) bool

IsAncestor returns whether commitId is an ancestor of this commit. False if it's the same commit. Similar to `git merge-base --is-ancestor`.

IsAncestor will traverse the ancestry of the current commit until it finds the target commitIt.

TODO: Use a bitmap index for reachability (https://github.com/shazow/go-git/issues/4)

func (*Commit) Message 

func (c *Commit) Message() string

Return the commit message. Same as retrieving CommitMessage directly.

func (*Commit) Parent 

func (c *Commit) Parent(n int) (*Commit, error)

Return parent number n (0-based index)

func (*Commit) ParentCount 

func (c *Commit) ParentCount() int

Return the number of parents of the commit. 0 if this is the root commit, otherwise 1,2,...

func (*Commit) ParentId 

func (c *Commit) ParentId(n int) (id sha1, err error)

Return oid of the parent number n (0-based index). Return nil if no such parent exists.

func (*Commit) ParentIds 

func (c *Commit) ParentIds() []sha1

Return the parent ids.

func (*Commit) Summary 

func (c *Commit) Summary() string

func (*Commit) TreeId 

func (c *Commit) TreeId() sha1

Return oid of the (root) tree of this commit.

func (*Commit) Walk 

func (c *Commit) Walk(walkFn CommitWalkFunc) error

Commit and its' parents will be traversed iteratively in depth-first order, walkFn called on each commit.

type CommitWalkFunc 

type CommitWalkFunc func(path []*Commit, current *Commit, err error) error

CommitWalkFunc is similar to path/filepath.WalkFunc, it will traverse all of a commit's ancestry as long as the returned error is nil. If SkipCommit is returned, then it will bypass that commit's subtree.

type Entries 

type Entries []*TreeEntry

func (Entries) Len 

func (bs Entries) Len() int

func (Entries) Less 

func (bs Entries) Less(i, j int) bool

func (Entries) Sort 

func (bs Entries) Sort()

func (Entries) Swap 

func (bs Entries) Swap(i, j int)

type EntryMode 

type EntryMode int
const (
	ModeBlob    EntryMode = 0100644
	ModeExec    EntryMode = 0100755
	ModeSymlink EntryMode = 0120000
	ModeCommit  EntryMode = 0160000
	ModeTree    EntryMode = 0040000
)

There are only a few file modes in Git. They look like unix file modes, but they can only be one of these.

type ObjectNotFound 

type ObjectNotFound sha1

ObjectNotFound error returned when a repo query is performed for an ID that does not exist.

func (ObjectNotFound) Error 

func (id ObjectNotFound) Error() string

type ObjectType 

type ObjectType int

Who am I? 

const (
	ObjectCommit ObjectType = 0x10
	ObjectTree   ObjectType = 0x20
	ObjectBlob   ObjectType = 0x30
	ObjectTag    ObjectType = 0x40
)

func (ObjectType) String 

func (t ObjectType) String() string

type RefNotFound 

type RefNotFound string

RefNotFound error returned when a commit is fetched by ref that is not found.

func (RefNotFound) Error 

func (err RefNotFound) Error() string

type Repository 

type Repository struct {
	Path string
	// contains filtered or unexported fields
}

A Repository is the base of all other actions. If you need to lookup a commit, tree or blob, you do it from here.

func OpenRepository 

func OpenRepository(path string) (*Repository, error)

Open the repository at the given path.

func (*Repository) CommitsBefore 

func (repo *Repository) CommitsBefore(commitId string) (*list.List, error)

func (*Repository) CommitsBetween 

func (repo *Repository) CommitsBetween(last *Commit, before *Commit) (*list.List, error)

used only for single tree, (]

func (*Repository) CreateBranch 

func (repo *Repository) CreateBranch(branchName, idStr string) error

func (*Repository) CreateTag 

func (repo *Repository) CreateTag(tagName, idStr string) error

func (*Repository) GetBranches 

func (repo *Repository) GetBranches() ([]string, error)

func (*Repository) GetCommit 

func (repo *Repository) GetCommit(commitId string) (*Commit, error)

Find the commit object in the repository.

func (*Repository) GetCommitIdOfBranch 

func (repo *Repository) GetCommitIdOfBranch(branchName string) (string, error)

func (*Repository) GetCommitIdOfTag 

func (repo *Repository) GetCommitIdOfTag(tagName string) (string, error)

func (*Repository) GetCommitOfBranch 

func (repo *Repository) GetCommitOfBranch(branchName string) (*Commit, error)

get branch's last commit or a special commit by id string

func (*Repository) GetCommitOfTag 

func (repo *Repository) GetCommitOfTag(tagName string) (*Commit, error)

func (*Repository) GetModules 

func (repo *Repository) GetModules() ([]string, error)

GetModules returns the submodule names that are initialized and cached within .git/modules

func (*Repository) GetTag 

func (repo *Repository) GetTag(tagName string) (*Tag, error)

func (*Repository) GetTags 

func (repo *Repository) GetTags() ([]string, error)

GetTags returns all tags of given repository.

func (*Repository) GetTree 

func (repo *Repository) GetTree(idStr string) (*Tree, error)

Find the tree object in the repository.

func (*Repository) HaveObject 

func (repo *Repository) HaveObject(idStr string) (found, packed bool, err error)

func (*Repository) HaveObjectFromReadSeeker 

func (repo *Repository) HaveObjectFromReadSeeker(
	objectType ObjectType,
	r io.ReadSeeker,
) (found bool, id sha1, err error)

Returns true if the content in `io.ReadSeeker` is aleady present in the object database. Leaves the initial seek position of `r` intact.

func (*Repository) IsBranchExist 

func (repo *Repository) IsBranchExist(branchName string) bool

func (*Repository) IsTagExist 

func (repo *Repository) IsTagExist(tagName string) bool

func (*Repository) StoreObjectLoose 

func (repo *Repository) StoreObjectLoose(
	objectType ObjectType,
	r io.ReadSeeker,
) (sha1, error)

Write an object into git's loose database. If the object already exists in the database, it is not overwritten, though the compression is still performed. To avoid the compression, call HaveObjectFromReader first, which is fast and just does the SHA.

func (*Repository) TagPath 

func (repo *Repository) TagPath(tagName string) string

type Signature 

type Signature struct {
	Email string
	Name  string
	When  time.Time
}

Author and Committer information

type Submodule 

type Submodule struct {
	Name string
	Path string
	URL  string
}

Submodule

type Tag 

type Tag struct {
	Name string
	Id   sha1

	Object     sha1 // The id of this commit object
	Type       string
	Tagger     *Signature
	TagMessage string
	// contains filtered or unexported fields
}

Tag

func (*Tag) Commit 

func (tag *Tag) Commit() (*Commit, error)

type Tree 

type Tree struct {
	Id sha1
	// contains filtered or unexported fields
}

A tree is a flat directory listing.

func NewTree 

func NewTree(repo *Repository, id sha1) *Tree

func (*Tree) GetBlobByPath 

func (t *Tree) GetBlobByPath(rpath string) (*Blob, error)

func (*Tree) GetSubmodules 

func (t *Tree) GetSubmodules() ([]*Submodule, error)

GetSubmodules returns the submodules in this commit tree (parsed from .gitmodules)

func (*Tree) GetTreeEntryByPath 

func (t *Tree) GetTreeEntryByPath(rpath string) (*TreeEntry, error)

func (*Tree) ListEntries 

func (t *Tree) ListEntries() (Entries, error)

func (*Tree) Scanner 

func (t *Tree) Scanner() (*TreeScanner, error)

func (*Tree) SubTree 

func (t *Tree) SubTree(rpath string) (*Tree, error)

func (*Tree) Walk 

func (t *Tree) Walk(walkFn TreeWalkFunc) error

The tree's directory heirarchy will be traversed recursively in breadth-first order, walkFn will be called once for each entry.

type TreeEntry 

type TreeEntry struct {
	Id   sha1
	Type ObjectType
	// contains filtered or unexported fields
}

func (*TreeEntry) Blob 

func (te *TreeEntry) Blob() *Blob

func (*TreeEntry) EntryMode 

func (te *TreeEntry) EntryMode() EntryMode

func (*TreeEntry) IsDir 

func (te *TreeEntry) IsDir() bool

func (*TreeEntry) ModTime 

func (te *TreeEntry) ModTime() time.Time

func (*TreeEntry) Mode 

func (te *TreeEntry) Mode() (mode os.FileMode)

func (*TreeEntry) Name 

func (te *TreeEntry) Name() string

func (*TreeEntry) Size 

func (te *TreeEntry) Size() int64

func (*TreeEntry) Sys 

func (te *TreeEntry) Sys() interface{}

func (*TreeEntry) Tree 

func (te *TreeEntry) Tree() *Tree

type TreeScanner 

type TreeScanner struct {
	*bufio.Scanner
	// contains filtered or unexported fields
}

func NewTreeScanner 

func NewTreeScanner(parent *Tree, rc io.ReadCloser) *TreeScanner

func (*TreeScanner) Err 

func (t *TreeScanner) Err() error

func (*TreeScanner) Scan 

func (t *TreeScanner) Scan() bool

func (*TreeScanner) TreeEntry 

func (t *TreeScanner) TreeEntry() *TreeEntry

type TreeWalkFunc 

type TreeWalkFunc func(path string, te *TreeEntry, err error) error

TreeWalkFunc is similar to path/filepath.WalkFunc, it will continue as long as the returned error is nil. If SkipDir is returned, then that subtree will be skipped.

Source Files

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