Bumps [gopkg.in/src-d/go-git.v4](https://github.com/src-d/go-git) from 4.8.0 to 4.10.0. - [Release notes](https://github.com/src-d/go-git/releases) - [Commits](https://github.com/src-d/go-git/compare/v4.8.0...v4.10.0)
320 lines
7.3 KiB
Go
320 lines
7.3 KiB
Go
// Package memory is a storage backend base on memory
|
|
package memory
|
|
|
|
import (
|
|
"fmt"
|
|
"time"
|
|
|
|
"gopkg.in/src-d/go-git.v4/config"
|
|
"gopkg.in/src-d/go-git.v4/plumbing"
|
|
"gopkg.in/src-d/go-git.v4/plumbing/format/index"
|
|
"gopkg.in/src-d/go-git.v4/plumbing/storer"
|
|
"gopkg.in/src-d/go-git.v4/storage"
|
|
)
|
|
|
|
var ErrUnsupportedObjectType = fmt.Errorf("unsupported object type")
|
|
|
|
// Storage is an implementation of git.Storer that stores data on memory, being
|
|
// ephemeral. The use of this storage should be done in controlled envoriments,
|
|
// since the representation in memory of some repository can fill the machine
|
|
// memory. in the other hand this storage has the best performance.
|
|
type Storage struct {
|
|
ConfigStorage
|
|
ObjectStorage
|
|
ShallowStorage
|
|
IndexStorage
|
|
ReferenceStorage
|
|
ModuleStorage
|
|
}
|
|
|
|
// NewStorage returns a new Storage base on memory
|
|
func NewStorage() *Storage {
|
|
return &Storage{
|
|
ReferenceStorage: make(ReferenceStorage),
|
|
ConfigStorage: ConfigStorage{},
|
|
ShallowStorage: ShallowStorage{},
|
|
ObjectStorage: ObjectStorage{
|
|
Objects: make(map[plumbing.Hash]plumbing.EncodedObject),
|
|
Commits: make(map[plumbing.Hash]plumbing.EncodedObject),
|
|
Trees: make(map[plumbing.Hash]plumbing.EncodedObject),
|
|
Blobs: make(map[plumbing.Hash]plumbing.EncodedObject),
|
|
Tags: make(map[plumbing.Hash]plumbing.EncodedObject),
|
|
},
|
|
ModuleStorage: make(ModuleStorage),
|
|
}
|
|
}
|
|
|
|
type ConfigStorage struct {
|
|
config *config.Config
|
|
}
|
|
|
|
func (c *ConfigStorage) SetConfig(cfg *config.Config) error {
|
|
if err := cfg.Validate(); err != nil {
|
|
return err
|
|
}
|
|
|
|
c.config = cfg
|
|
return nil
|
|
}
|
|
|
|
func (c *ConfigStorage) Config() (*config.Config, error) {
|
|
if c.config == nil {
|
|
c.config = config.NewConfig()
|
|
}
|
|
|
|
return c.config, nil
|
|
}
|
|
|
|
type IndexStorage struct {
|
|
index *index.Index
|
|
}
|
|
|
|
func (c *IndexStorage) SetIndex(idx *index.Index) error {
|
|
c.index = idx
|
|
return nil
|
|
}
|
|
|
|
func (c *IndexStorage) Index() (*index.Index, error) {
|
|
if c.index == nil {
|
|
c.index = &index.Index{Version: 2}
|
|
}
|
|
|
|
return c.index, nil
|
|
}
|
|
|
|
type ObjectStorage struct {
|
|
Objects map[plumbing.Hash]plumbing.EncodedObject
|
|
Commits map[plumbing.Hash]plumbing.EncodedObject
|
|
Trees map[plumbing.Hash]plumbing.EncodedObject
|
|
Blobs map[plumbing.Hash]plumbing.EncodedObject
|
|
Tags map[plumbing.Hash]plumbing.EncodedObject
|
|
}
|
|
|
|
func (o *ObjectStorage) NewEncodedObject() plumbing.EncodedObject {
|
|
return &plumbing.MemoryObject{}
|
|
}
|
|
|
|
func (o *ObjectStorage) SetEncodedObject(obj plumbing.EncodedObject) (plumbing.Hash, error) {
|
|
h := obj.Hash()
|
|
o.Objects[h] = obj
|
|
|
|
switch obj.Type() {
|
|
case plumbing.CommitObject:
|
|
o.Commits[h] = o.Objects[h]
|
|
case plumbing.TreeObject:
|
|
o.Trees[h] = o.Objects[h]
|
|
case plumbing.BlobObject:
|
|
o.Blobs[h] = o.Objects[h]
|
|
case plumbing.TagObject:
|
|
o.Tags[h] = o.Objects[h]
|
|
default:
|
|
return h, ErrUnsupportedObjectType
|
|
}
|
|
|
|
return h, nil
|
|
}
|
|
|
|
func (o *ObjectStorage) HasEncodedObject(h plumbing.Hash) (err error) {
|
|
if _, ok := o.Objects[h]; !ok {
|
|
return plumbing.ErrObjectNotFound
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (o *ObjectStorage) EncodedObjectSize(h plumbing.Hash) (
|
|
size int64, err error) {
|
|
obj, ok := o.Objects[h]
|
|
if !ok {
|
|
return 0, plumbing.ErrObjectNotFound
|
|
}
|
|
|
|
return obj.Size(), nil
|
|
}
|
|
|
|
func (o *ObjectStorage) EncodedObject(t plumbing.ObjectType, h plumbing.Hash) (plumbing.EncodedObject, error) {
|
|
obj, ok := o.Objects[h]
|
|
if !ok || (plumbing.AnyObject != t && obj.Type() != t) {
|
|
return nil, plumbing.ErrObjectNotFound
|
|
}
|
|
|
|
return obj, nil
|
|
}
|
|
|
|
func (o *ObjectStorage) IterEncodedObjects(t plumbing.ObjectType) (storer.EncodedObjectIter, error) {
|
|
var series []plumbing.EncodedObject
|
|
switch t {
|
|
case plumbing.AnyObject:
|
|
series = flattenObjectMap(o.Objects)
|
|
case plumbing.CommitObject:
|
|
series = flattenObjectMap(o.Commits)
|
|
case plumbing.TreeObject:
|
|
series = flattenObjectMap(o.Trees)
|
|
case plumbing.BlobObject:
|
|
series = flattenObjectMap(o.Blobs)
|
|
case plumbing.TagObject:
|
|
series = flattenObjectMap(o.Tags)
|
|
}
|
|
|
|
return storer.NewEncodedObjectSliceIter(series), nil
|
|
}
|
|
|
|
func flattenObjectMap(m map[plumbing.Hash]plumbing.EncodedObject) []plumbing.EncodedObject {
|
|
objects := make([]plumbing.EncodedObject, 0, len(m))
|
|
for _, obj := range m {
|
|
objects = append(objects, obj)
|
|
}
|
|
return objects
|
|
}
|
|
|
|
func (o *ObjectStorage) Begin() storer.Transaction {
|
|
return &TxObjectStorage{
|
|
Storage: o,
|
|
Objects: make(map[plumbing.Hash]plumbing.EncodedObject),
|
|
}
|
|
}
|
|
|
|
func (o *ObjectStorage) ForEachObjectHash(fun func(plumbing.Hash) error) error {
|
|
for h := range o.Objects {
|
|
err := fun(h)
|
|
if err != nil {
|
|
if err == storer.ErrStop {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (o *ObjectStorage) ObjectPacks() ([]plumbing.Hash, error) {
|
|
return nil, nil
|
|
}
|
|
func (o *ObjectStorage) DeleteOldObjectPackAndIndex(plumbing.Hash, time.Time) error {
|
|
return nil
|
|
}
|
|
|
|
var errNotSupported = fmt.Errorf("Not supported")
|
|
|
|
func (s *ObjectStorage) LooseObjectTime(hash plumbing.Hash) (time.Time, error) {
|
|
return time.Time{}, errNotSupported
|
|
}
|
|
func (s *ObjectStorage) DeleteLooseObject(plumbing.Hash) error {
|
|
return errNotSupported
|
|
}
|
|
|
|
type TxObjectStorage struct {
|
|
Storage *ObjectStorage
|
|
Objects map[plumbing.Hash]plumbing.EncodedObject
|
|
}
|
|
|
|
func (tx *TxObjectStorage) SetEncodedObject(obj plumbing.EncodedObject) (plumbing.Hash, error) {
|
|
h := obj.Hash()
|
|
tx.Objects[h] = obj
|
|
|
|
return h, nil
|
|
}
|
|
|
|
func (tx *TxObjectStorage) EncodedObject(t plumbing.ObjectType, h plumbing.Hash) (plumbing.EncodedObject, error) {
|
|
obj, ok := tx.Objects[h]
|
|
if !ok || (plumbing.AnyObject != t && obj.Type() != t) {
|
|
return nil, plumbing.ErrObjectNotFound
|
|
}
|
|
|
|
return obj, nil
|
|
}
|
|
|
|
func (tx *TxObjectStorage) Commit() error {
|
|
for h, obj := range tx.Objects {
|
|
delete(tx.Objects, h)
|
|
if _, err := tx.Storage.SetEncodedObject(obj); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (tx *TxObjectStorage) Rollback() error {
|
|
tx.Objects = make(map[plumbing.Hash]plumbing.EncodedObject)
|
|
return nil
|
|
}
|
|
|
|
type ReferenceStorage map[plumbing.ReferenceName]*plumbing.Reference
|
|
|
|
func (r ReferenceStorage) SetReference(ref *plumbing.Reference) error {
|
|
if ref != nil {
|
|
r[ref.Name()] = ref
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (r ReferenceStorage) CheckAndSetReference(ref, old *plumbing.Reference) error {
|
|
if ref == nil {
|
|
return nil
|
|
}
|
|
|
|
if old != nil {
|
|
tmp := r[ref.Name()]
|
|
if tmp != nil && tmp.Hash() != old.Hash() {
|
|
return storage.ErrReferenceHasChanged
|
|
}
|
|
}
|
|
r[ref.Name()] = ref
|
|
return nil
|
|
}
|
|
|
|
func (r ReferenceStorage) Reference(n plumbing.ReferenceName) (*plumbing.Reference, error) {
|
|
ref, ok := r[n]
|
|
if !ok {
|
|
return nil, plumbing.ErrReferenceNotFound
|
|
}
|
|
|
|
return ref, nil
|
|
}
|
|
|
|
func (r ReferenceStorage) IterReferences() (storer.ReferenceIter, error) {
|
|
var refs []*plumbing.Reference
|
|
for _, ref := range r {
|
|
refs = append(refs, ref)
|
|
}
|
|
|
|
return storer.NewReferenceSliceIter(refs), nil
|
|
}
|
|
|
|
func (r ReferenceStorage) CountLooseRefs() (int, error) {
|
|
return len(r), nil
|
|
}
|
|
|
|
func (r ReferenceStorage) PackRefs() error {
|
|
return nil
|
|
}
|
|
|
|
func (r ReferenceStorage) RemoveReference(n plumbing.ReferenceName) error {
|
|
delete(r, n)
|
|
return nil
|
|
}
|
|
|
|
type ShallowStorage []plumbing.Hash
|
|
|
|
func (s *ShallowStorage) SetShallow(commits []plumbing.Hash) error {
|
|
*s = commits
|
|
return nil
|
|
}
|
|
|
|
func (s ShallowStorage) Shallow() ([]plumbing.Hash, error) {
|
|
return s, nil
|
|
}
|
|
|
|
type ModuleStorage map[string]*Storage
|
|
|
|
func (s ModuleStorage) Module(name string) (storage.Storer, error) {
|
|
if m, ok := s[name]; ok {
|
|
return m, nil
|
|
}
|
|
|
|
m := NewStorage()
|
|
s[name] = m
|
|
|
|
return m, nil
|
|
}
|