object

package
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 Go to latest Published: Mar 12, 2018 License: Apache-2.0 Imports: 23 Imported by: 0

Documentation

Overview

Package object contains implementations of all Git objects and utility functions to work with them.

Index

Constants

View Source 
const DateFormat = "Mon Jan 02 15:04:05 2006 -0700"

DateFormat is the format being used in the original git implementation

Variables

View Source 
var (
	ErrMaxTreeDepth      = errors.New("maximum tree depth exceeded")
	ErrFileNotFound      = errors.New("file not found")
	ErrDirectoryNotFound = errors.New("directory not found")
)

New errors defined by this package.

View Source 
var ErrParentNotFound = errors.New("commit parent not found")
View Source 
var ErrUnsupportedObject = errors.New("unsupported object type")

ErrUnsupportedObject trigger when a non-supported object is being decoded.

Functions

func NewTreeRootNode 

func NewTreeRootNode(t *Tree) noder.Noder

NewTreeRootNode returns the root node of a Tree

Types

type Blob 

type Blob struct {
	// Hash of the blob.
	Hash plumbing.Hash
	// Size of the (uncompressed) blob.
	Size int64
	// contains filtered or unexported fields
}

Blob is used to store arbitrary data - it is generally a file.

func DecodeBlob 

func DecodeBlob(o plumbing.EncodedObject) (*Blob, error)

DecodeObject decodes an encoded object into a *Blob.

func GetBlob 

func GetBlob(s storer.EncodedObjectStorer, h plumbing.Hash) (*Blob, error)

GetBlob gets a blob from an object storer and decodes it.

func (*Blob) Decode 

func (b *Blob) Decode(o plumbing.EncodedObject) error

Decode transforms a plumbing.EncodedObject into a Blob struct.

func (*Blob) Encode 

func (b *Blob) Encode(o plumbing.EncodedObject) error

Encode transforms a Blob into a plumbing.EncodedObject.

func (*Blob) ID 

func (b *Blob) ID() plumbing.Hash

ID returns the object ID of the blob. The returned value will always match the current value of Blob.Hash.

ID is present to fulfill the Object interface.

func (*Blob) Reader 

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

Reader returns a reader allow the access to the content of the blob

func (*Blob) Type 

func (b *Blob) Type() plumbing.ObjectType

Type returns the type of object. It always returns plumbing.BlobObject.

Type is present to fulfill the Object interface.

type BlobIter 

type BlobIter struct {
	storer.EncodedObjectIter
	// contains filtered or unexported fields
}

BlobIter provides an iterator for a set of blobs.

func NewBlobIter 

func NewBlobIter(s storer.EncodedObjectStorer, iter storer.EncodedObjectIter) *BlobIter

NewBlobIter takes a storer.EncodedObjectStorer and a storer.EncodedObjectIter and returns a *BlobIter that iterates over all blobs contained in the storer.EncodedObjectIter.

Any non-blob object returned by the storer.EncodedObjectIter is skipped.

func (*BlobIter) ForEach 

func (iter *BlobIter) ForEach(cb func(*Blob) error) error

ForEach call the cb function for each blob contained on this iter until an error happens or the end of the iter is reached. If ErrStop is sent the iteration is stop but no error is returned. The iterator is closed.

func (*BlobIter) Next 

func (iter *BlobIter) Next() (*Blob, error)

Next moves the iterator to the next blob and returns a pointer to it. If there are no more blobs, it returns io.EOF.

type Change 

type Change struct {
	From ChangeEntry
	To   ChangeEntry
}

Change values represent a detected change between two git trees. For modifications, From is the original status of the node and To is its final status. For insertions, From is the zero value and for deletions To is the zero value.

func (*Change) Action 

func (c *Change) Action() (merkletrie.Action, error)

Action returns the kind of action represented by the change, an insertion, a deletion or a modification.

func (*Change) Files 

func (c *Change) Files() (from, to *File, err error)

Files return the files before and after a change. For insertions from will be nil. For deletions to will be nil.

func (*Change) Patch 

func (c *Change) Patch() (*Patch, error)

Patch returns a Patch with all the file changes in chunks. This representation can be used to create several diff outputs.

func (*Change) String 

func (c *Change) String() string

type ChangeEntry 

type ChangeEntry struct {
	// Full path of the node using "/" as separator.
	Name string
	// Parent tree of the node that has changed.
	Tree *Tree
	// The entry of the node.
	TreeEntry TreeEntry
}

ChangeEntry values represent a node that has suffered a change.

type Changes 

type Changes []*Change

Changes represents a collection of changes between two git trees. Implements sort.Interface lexicographically over the path of the changed files.

func DiffTree 

func DiffTree(a, b *Tree) (Changes, error)

DiffTree compares the content and mode of the blobs found via two tree objects.

func (Changes) Len 

func (c Changes) Len() int

func (Changes) Less 

func (c Changes) Less(i, j int) bool

func (Changes) Patch 

func (c Changes) Patch() (*Patch, error)

Patch returns a Patch with all the changes in chunks. This representation can be used to create several diff outputs.

func (Changes) String 

func (c Changes) String() string

func (Changes) Swap 

func (c Changes) Swap(i, j int)

type Commit 

type Commit struct {
	// Hash of the commit object.
	Hash plumbing.Hash
	// Author is the original author of the commit.
	Author Signature
	// Committer is the one performing the commit, might be different from
	// Author.
	Committer Signature
	// PGPSignature is the PGP signature of the commit.
	PGPSignature string
	// Message is the commit message, contains arbitrary text.
	Message string
	// TreeHash is the hash of the root tree of the commit.
	TreeHash plumbing.Hash
	// ParentHashes are the hashes of the parent commits of the commit.
	ParentHashes []plumbing.Hash
	// contains filtered or unexported fields
}

Commit points to a single tree, marking it as what the project looked like at a certain point in time. It contains meta-information about that point in time, such as a timestamp, the author of the changes since the last commit, a pointer to the previous commit(s), etc. http://shafiulazam.com/gitbook/1_the_git_object_model.html

func DecodeCommit 

func DecodeCommit(s storer.EncodedObjectStorer, o plumbing.EncodedObject) (*Commit, error)

DecodeCommit decodes an encoded object into a *Commit and associates it to the given object storer.

func GetCommit 

func GetCommit(s storer.EncodedObjectStorer, h plumbing.Hash) (*Commit, error)

GetCommit gets a commit from an object storer and decodes it.

func (*Commit) Decode 

func (c *Commit) Decode(o plumbing.EncodedObject) (err error)

Decode transforms a plumbing.EncodedObject into a Commit struct.

func (*Commit) Encode 

func (b *Commit) Encode(o plumbing.EncodedObject) error

Encode transforms a Commit into a plumbing.EncodedObject.

func (*Commit) File 

func (c *Commit) File(path string) (*File, error)

File returns the file with the specified "path" in the commit and a nil error if the file exists. If the file does not exist, it returns a nil file and the ErrFileNotFound error.

func (*Commit) Files 

func (c *Commit) Files() (*FileIter, error)

Files returns a FileIter allowing to iterate over the Tree

func (*Commit) ID 

func (c *Commit) ID() plumbing.Hash

ID returns the object ID of the commit. The returned value will always match the current value of Commit.Hash.

ID is present to fulfill the Object interface.

func (*Commit) NumParents 

func (c *Commit) NumParents() int

NumParents returns the number of parents in a commit.

func (*Commit) Parent 

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

Parent returns the ith parent of a commit.

func (*Commit) Parents 

func (c *Commit) Parents() CommitIter

Parents return a CommitIter to the parent Commits.

func (*Commit) Patch 

func (c *Commit) Patch(to *Commit) (*Patch, error)

Patch returns the Patch between the actual commit and the provided one.

func (*Commit) Stats 

func (c *Commit) Stats() (FileStats, error)

Stats shows the status of commit.

func (*Commit) String 

func (c *Commit) String() string

func (*Commit) Tree 

func (c *Commit) Tree() (*Tree, error)

Tree returns the Tree from the commit.

func (*Commit) Type 

func (c *Commit) Type() plumbing.ObjectType

Type returns the type of object. It always returns plumbing.CommitObject.

Type is present to fulfill the Object interface.

func (*Commit) Verify 

func (c *Commit) Verify(armoredKeyRing string) (*openpgp.Entity, error)

Verify performs PGP verification of the commit with a provided armored keyring and returns openpgp.Entity associated with verifying key on success.

type CommitIter 

type CommitIter interface {
	Next() (*Commit, error)
	ForEach(func(*Commit) error) error
	Close()
}

CommitIter is a generic closable interface for iterating over commits.

func NewCommitIter 

func NewCommitIter(s storer.EncodedObjectStorer, iter storer.EncodedObjectIter) CommitIter

NewCommitIter takes a storer.EncodedObjectStorer and a storer.EncodedObjectIter and returns a CommitIter that iterates over all commits contained in the storer.EncodedObjectIter.

Any non-commit object returned by the storer.EncodedObjectIter is skipped.

func NewCommitIterBSF 

func NewCommitIterBSF(
	c *Commit,
	seenExternal map[plumbing.Hash]bool,
	ignore []plumbing.Hash,
) CommitIter

NewCommitIterBSF returns a CommitIter that walks the commit history, starting at the given commit and visiting its parents in pre-order. The given callback will be called for each visited commit. Each commit will be visited only once. If the callback returns an error, walking will stop and will return the error. Other errors might be returned if the history cannot be traversed (e.g. missing objects). Ignore allows to skip some commits from being iterated.

func NewCommitIterCTime 

func NewCommitIterCTime(
	c *Commit,
	seenExternal map[plumbing.Hash]bool,
	ignore []plumbing.Hash,
) CommitIter

NewCommitIterCTime returns a CommitIter that walks the commit history, starting at the given commit and visiting its parents while preserving Committer Time order. this appears to be the closest order to `git log` The given callback will be called for each visited commit. Each commit will be visited only once. If the callback returns an error, walking will stop and will return the error. Other errors might be returned if the history cannot be traversed (e.g. missing objects). Ignore allows to skip some commits from being iterated.

func NewCommitPostorderIter 

func NewCommitPostorderIter(c *Commit, ignore []plumbing.Hash) CommitIter

NewCommitPostorderIter returns a CommitIter that walks the commit history like WalkCommitHistory but in post-order. This means that after walking a merge commit, the merged commit will be walked before the base it was merged on. This can be useful if you wish to see the history in chronological order. Ignore allows to skip some commits from being iterated.

func NewCommitPreorderIter 

func NewCommitPreorderIter(
	c *Commit,
	seenExternal map[plumbing.Hash]bool,
	ignore []plumbing.Hash,
) CommitIter

NewCommitPreorderIter returns a CommitIter that walks the commit history, starting at the given commit and visiting its parents in pre-order. The given callback will be called for each visited commit. Each commit will be visited only once. If the callback returns an error, walking will stop and will return the error. Other errors might be returned if the history cannot be traversed (e.g. missing objects). Ignore allows to skip some commits from being iterated.

type File 

type File struct {
	// Name is the path of the file. It might be relative to a tree,
	// depending of the function that generates it.
	Name string
	// Mode is the file mode.
	Mode filemode.FileMode
	// Blob with the contents of the file.
	Blob
}

File represents git file objects.

func NewFile 

func NewFile(name string, m filemode.FileMode, b *Blob) *File

NewFile returns a File based on the given blob object

func (*File) Contents 

func (f *File) Contents() (content string, err error)

Contents returns the contents of a file as a string.

func (*File) IsBinary 

func (f *File) IsBinary() (bool, error)

IsBinary returns if the file is binary or not

func (*File) Lines 

func (f *File) Lines() ([]string, error)

Lines returns a slice of lines from the contents of a file, stripping all end of line characters. If the last line is empty (does not end in an end of line), it is also stripped.

type FileIter 

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

FileIter provides an iterator for the files in a tree.

func NewFileIter 

func NewFileIter(s storer.EncodedObjectStorer, t *Tree) *FileIter

NewFileIter takes a storer.EncodedObjectStorer and a Tree and returns a *FileIter that iterates over all files contained in the tree, recursively.

func (*FileIter) Close 

func (iter *FileIter) Close()

func (*FileIter) ForEach 

func (iter *FileIter) ForEach(cb func(*File) error) error

ForEach call the cb function for each file contained in this iter until an error happens or the end of the iter is reached. If plumbing.ErrStop is sent the iteration is stop but no error is returned. The iterator is closed.

func (*FileIter) Next 

func (iter *FileIter) Next() (*File, error)

Next moves the iterator to the next file and returns a pointer to it. If there are no more files, it returns io.EOF.

type FileStat 

type FileStat struct {
	Name     string
	Addition int
	Deletion int
}

FileStat stores the status of changes in content of a file.

func (FileStat) String 

func (fs FileStat) String() string

type FileStats 

type FileStats []FileStat

FileStats is a collection of FileStat.

func (FileStats) String 

func (fileStats FileStats) String() string

type Hash 

type Hash plumbing.Hash

Hash represents the hash of an object

type Object 

type Object interface {
	ID() plumbing.Hash
	Type() plumbing.ObjectType
	Decode(plumbing.EncodedObject) error
	Encode(plumbing.EncodedObject) error
}

Object is a generic representation of any git object. It is implemented by Commit, Tree, Blob, and Tag, and includes the functions that are common to them.

Object is returned when an object can be of any type. It is frequently used with a type cast to acquire the specific type of object: 

func process(obj Object) {
	switch o := obj.(type) {
	case *Commit:
		// o is a Commit
	case *Tree:
		// o is a Tree
	case *Blob:
		// o is a Blob
	case *Tag:
		// o is a Tag
	}
}

This interface is intentionally different from plumbing.EncodedObject, which is a lower level interface used by storage implementations to read and write objects in its encoded form.

func DecodeObject 

func DecodeObject(s storer.EncodedObjectStorer, o plumbing.EncodedObject) (Object, error)

DecodeObject decodes an encoded object into an Object and associates it to the given object storer.

func GetObject 

func GetObject(s storer.EncodedObjectStorer, h plumbing.Hash) (Object, error)

GetObject gets an object from an object storer and decodes it.

type ObjectIter 

type ObjectIter struct {
	storer.EncodedObjectIter
	// contains filtered or unexported fields
}

ObjectIter provides an iterator for a set of objects.

func NewObjectIter 

func NewObjectIter(s storer.EncodedObjectStorer, iter storer.EncodedObjectIter) *ObjectIter

NewObjectIter takes a storer.EncodedObjectStorer and a storer.EncodedObjectIter and returns an *ObjectIter that iterates over all objects contained in the storer.EncodedObjectIter.

func (*ObjectIter) ForEach 

func (iter *ObjectIter) ForEach(cb func(Object) error) error

ForEach call the cb function for each object contained on this iter until an error happens or the end of the iter is reached. If ErrStop is sent the iteration is stop but no error is returned. The iterator is closed.

func (*ObjectIter) Next 

func (iter *ObjectIter) Next() (Object, error)

Next moves the iterator to the next object and returns a pointer to it. If there are no more objects, it returns io.EOF.

type Patch 

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

textPatch is an implementation of fdiff.Patch interface

func (*Patch) Encode 

func (p *Patch) Encode(w io.Writer) error

func (*Patch) FilePatches 

func (t *Patch) FilePatches() []fdiff.FilePatch

func (*Patch) Message 

func (t *Patch) Message() string

func (*Patch) Stats 

func (p *Patch) Stats() FileStats

func (*Patch) String 

func (p *Patch) String() string

type Signature 

type Signature struct {
	// Name represents a person name. It is an arbitrary string.
	Name string
	// Email is an email, but it cannot be assumed to be well-formed.
	Email string
	// When is the timestamp of the signature.
	When time.Time
}

Signature is used to identify who and when created a commit or tag.

func (*Signature) Decode 

func (s *Signature) Decode(b []byte)

Decode decodes a byte slice into a signature

func (*Signature) Encode 

func (s *Signature) Encode(w io.Writer) error

Encode encodes a Signature into a writer.

func (*Signature) String 

func (s *Signature) String() string

type Tag 

type Tag struct {
	// Hash of the tag.
	Hash plumbing.Hash
	// Name of the tag.
	Name string
	// Tagger is the one who created the tag.
	Tagger Signature
	// Message is an arbitrary text message.
	Message string
	// PGPSignature is the PGP signature of the tag.
	PGPSignature string
	// TargetType is the object type of the target.
	TargetType plumbing.ObjectType
	// Target is the hash of the target object.
	Target plumbing.Hash
	// contains filtered or unexported fields
}

Tag represents an annotated tag object. It points to a single git object of any type, but tags typically are applied to commit or blob objects. It provides a reference that associates the target with a tag name. It also contains meta-information about the tag, including the tagger, tag date and message.

Note that this is not used for lightweight tags.

https://git-scm.com/book/en/v2/Git-Internals-Git-References#Tags

func DecodeTag 

func DecodeTag(s storer.EncodedObjectStorer, o plumbing.EncodedObject) (*Tag, error)

DecodeTag decodes an encoded object into a *Commit and associates it to the given object storer.

func GetTag 

func GetTag(s storer.EncodedObjectStorer, h plumbing.Hash) (*Tag, error)

GetTag gets a tag from an object storer and decodes it.

func (*Tag) Blob 

func (t *Tag) Blob() (*Blob, error)

Blob returns the blob pointed to by the tag. If the tag points to a different type of object ErrUnsupportedObject will be returned.

func (*Tag) Commit 

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

Commit returns the commit pointed to by the tag. If the tag points to a different type of object ErrUnsupportedObject will be returned.

func (*Tag) Decode 

func (t *Tag) Decode(o plumbing.EncodedObject) (err error)

Decode transforms a plumbing.EncodedObject into a Tag struct.

func (*Tag) Encode 

func (t *Tag) Encode(o plumbing.EncodedObject) error

Encode transforms a Tag into a plumbing.EncodedObject.

func (*Tag) ID 

func (t *Tag) ID() plumbing.Hash

ID returns the object ID of the tag, not the object that the tag references. The returned value will always match the current value of Tag.Hash.

ID is present to fulfill the Object interface.

func (*Tag) Object 

func (t *Tag) Object() (Object, error)

Object returns the object pointed to by the tag.

func (*Tag) String 

func (t *Tag) String() string

String returns the meta information contained in the tag as a formatted string.

func (*Tag) Tree 

func (t *Tag) Tree() (*Tree, error)

Tree returns the tree pointed to by the tag. If the tag points to a commit object the tree of that commit will be returned. If the tag does not point to a commit or tree object ErrUnsupportedObject will be returned.

func (*Tag) Type 

func (t *Tag) Type() plumbing.ObjectType

Type returns the type of object. It always returns plumbing.TagObject.

Type is present to fulfill the Object interface.

func (*Tag) Verify 

func (t *Tag) Verify(armoredKeyRing string) (*openpgp.Entity, error)

Verify performs PGP verification of the tag with a provided armored keyring and returns openpgp.Entity associated with verifying key on success.

type TagIter 

type TagIter struct {
	storer.EncodedObjectIter
	// contains filtered or unexported fields
}

TagIter provides an iterator for a set of tags.

func NewTagIter 

func NewTagIter(s storer.EncodedObjectStorer, iter storer.EncodedObjectIter) *TagIter

NewTagIter takes a storer.EncodedObjectStorer and a storer.EncodedObjectIter and returns a *TagIter that iterates over all tags contained in the storer.EncodedObjectIter.

Any non-tag object returned by the storer.EncodedObjectIter is skipped.

func (*TagIter) ForEach 

func (iter *TagIter) ForEach(cb func(*Tag) error) error

ForEach call the cb function for each tag contained on this iter until an error happens or the end of the iter is reached. If ErrStop is sent the iteration is stop but no error is returned. The iterator is closed.

func (*TagIter) Next 

func (iter *TagIter) Next() (*Tag, error)

Next moves the iterator to the next tag and returns a pointer to it. If there are no more tags, it returns io.EOF.

type Tree 

type Tree struct {
	Entries []TreeEntry
	Hash    plumbing.Hash
	// contains filtered or unexported fields
}

Tree is basically like a directory - it references a bunch of other trees and/or blobs (i.e. files and sub-directories)

func DecodeTree 

func DecodeTree(s storer.EncodedObjectStorer, o plumbing.EncodedObject) (*Tree, error)

DecodeTree decodes an encoded object into a *Tree and associates it to the given object storer.

func GetTree 

func GetTree(s storer.EncodedObjectStorer, h plumbing.Hash) (*Tree, error)

GetTree gets a tree from an object storer and decodes it.

func (*Tree) Decode 

func (t *Tree) Decode(o plumbing.EncodedObject) (err error)

Decode transform an plumbing.EncodedObject into a Tree struct

func (*Tree) Diff 

func (from *Tree) Diff(to *Tree) (Changes, error)

Diff returns a list of changes between this tree and the provided one

func (*Tree) Encode 

func (t *Tree) Encode(o plumbing.EncodedObject) error

Encode transforms a Tree into a plumbing.EncodedObject.

func (*Tree) File 

func (t *Tree) File(path string) (*File, error)

File returns the hash of the file identified by the `path` argument. The path is interpreted as relative to the tree receiver.

func (*Tree) Files 

func (t *Tree) Files() *FileIter

Files returns a FileIter allowing to iterate over the Tree

func (*Tree) FindEntry 

func (t *Tree) FindEntry(path string) (*TreeEntry, error)

FindEntry search a TreeEntry in this tree or any subtree.

func (*Tree) ID 

func (t *Tree) ID() plumbing.Hash

ID returns the object ID of the tree. The returned value will always match the current value of Tree.Hash.

ID is present to fulfill the Object interface.

func (*Tree) Patch 

func (from *Tree) Patch(to *Tree) (*Patch, error)

Patch returns a slice of Patch objects with all the changes between trees in chunks. This representation can be used to create several diff outputs.

func (*Tree) Tree 

func (t *Tree) Tree(path string) (*Tree, error)

Tree returns the tree identified by the `path` argument. The path is interpreted as relative to the tree receiver.

func (*Tree) TreeEntryFile 

func (t *Tree) TreeEntryFile(e *TreeEntry) (*File, error)

TreeEntryFile returns the *File for a given *TreeEntry.

func (*Tree) Type 

func (t *Tree) Type() plumbing.ObjectType

Type returns the type of object. It always returns plumbing.TreeObject.

type TreeEntry 

type TreeEntry struct {
	Name string
	Mode filemode.FileMode
	Hash plumbing.Hash
}

TreeEntry represents a file

type TreeIter 

type TreeIter struct {
	storer.EncodedObjectIter
	// contains filtered or unexported fields
}

TreeIter provides an iterator for a set of trees.

func NewTreeIter 

func NewTreeIter(s storer.EncodedObjectStorer, iter storer.EncodedObjectIter) *TreeIter

NewTreeIter takes a storer.EncodedObjectStorer and a storer.EncodedObjectIter and returns a *TreeIter that iterates over all tree contained in the storer.EncodedObjectIter.

Any non-tree object returned by the storer.EncodedObjectIter is skipped.

func (*TreeIter) ForEach 

func (iter *TreeIter) ForEach(cb func(*Tree) error) error

ForEach call the cb function for each tree contained on this iter until an error happens or the end of the iter is reached. If ErrStop is sent the iteration is stop but no error is returned. The iterator is closed.

func (*TreeIter) Next 

func (iter *TreeIter) Next() (*Tree, error)

Next moves the iterator to the next tree and returns a pointer to it. If there are no more trees, it returns io.EOF.

type TreeWalker 

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

TreeWalker provides a means of walking through all of the entries in a Tree.

func NewTreeWalker 

func NewTreeWalker(t *Tree, recursive bool, seen map[plumbing.Hash]bool) *TreeWalker

NewTreeWalker returns a new TreeWalker for the given tree.

It is the caller's responsibility to call Close() when finished with the tree walker.

func (*TreeWalker) Close 

func (w *TreeWalker) Close()

Close releases any resources used by the TreeWalker.

func (*TreeWalker) Next 

func (w *TreeWalker) Next() (name string, entry TreeEntry, err error)

Next returns the next object from the tree. Objects are returned in order and subtrees are included. After the last object has been returned further calls to Next() will return io.EOF.

In the current implementation any objects which cannot be found in the underlying repository will be skipped automatically. It is possible that this may change in future versions.

func (*TreeWalker) Tree 

func (w *TreeWalker) Tree() *Tree

Tree returns the tree that the tree walker most recently operated on.

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