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remote.go
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remote.go
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package git
import (
"context"
"errors"
"fmt"
"io"
"strings"
"time"
"github.com/go-git/go-billy/v5/osfs"
"github.com/go-git/go-git/v5/config"
"github.com/go-git/go-git/v5/internal/url"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/cache"
"github.com/go-git/go-git/v5/plumbing/format/packfile"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/go-git/go-git/v5/plumbing/protocol/packp"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/sideband"
"github.com/go-git/go-git/v5/plumbing/revlist"
"github.com/go-git/go-git/v5/plumbing/storer"
"github.com/go-git/go-git/v5/plumbing/transport"
"github.com/go-git/go-git/v5/plumbing/transport/client"
"github.com/go-git/go-git/v5/storage"
"github.com/go-git/go-git/v5/storage/filesystem"
"github.com/go-git/go-git/v5/storage/memory"
"github.com/go-git/go-git/v5/utils/ioutil"
)
var (
NoErrAlreadyUpToDate = errors.New("already up-to-date")
ErrDeleteRefNotSupported = errors.New("server does not support delete-refs")
ErrForceNeeded = errors.New("some refs were not updated")
ErrExactSHA1NotSupported = errors.New("server does not support exact SHA1 refspec")
)
type NoMatchingRefSpecError struct {
refSpec config.RefSpec
}
func (e NoMatchingRefSpecError) Error() string {
return fmt.Sprintf("couldn't find remote ref %q", e.refSpec.Src())
}
func (e NoMatchingRefSpecError) Is(target error) bool {
_, ok := target.(NoMatchingRefSpecError)
return ok
}
const (
// This describes the maximum number of commits to walk when
// computing the haves to send to a server, for each ref in the
// repo containing this remote, when not using the multi-ack
// protocol. Setting this to 0 means there is no limit.
maxHavesToVisitPerRef = 100
)
// Remote represents a connection to a remote repository.
type Remote struct {
c *config.RemoteConfig
s storage.Storer
}
// NewRemote creates a new Remote.
// The intended purpose is to use the Remote for tasks such as listing remote references (like using git ls-remote).
// Otherwise Remotes should be created via the use of a Repository.
func NewRemote(s storage.Storer, c *config.RemoteConfig) *Remote {
return &Remote{s: s, c: c}
}
// Config returns the RemoteConfig object used to instantiate this Remote.
func (r *Remote) Config() *config.RemoteConfig {
return r.c
}
func (r *Remote) String() string {
var fetch, push string
if len(r.c.URLs) > 0 {
fetch = r.c.URLs[0]
push = r.c.URLs[0]
}
return fmt.Sprintf("%s\t%s (fetch)\n%[1]s\t%[3]s (push)", r.c.Name, fetch, push)
}
// Push performs a push to the remote. Returns NoErrAlreadyUpToDate if the
// remote was already up-to-date.
func (r *Remote) Push(o *PushOptions) error {
return r.PushContext(context.Background(), o)
}
// PushContext performs a push to the remote. Returns NoErrAlreadyUpToDate if
// the remote was already up-to-date.
//
// The provided Context must be non-nil. If the context expires before the
// operation is complete, an error is returned. The context only affects the
// transport operations.
func (r *Remote) PushContext(ctx context.Context, o *PushOptions) (err error) {
if err := o.Validate(); err != nil {
return err
}
if o.RemoteName != r.c.Name {
return fmt.Errorf("remote names don't match: %s != %s", o.RemoteName, r.c.Name)
}
if o.RemoteURL == "" {
o.RemoteURL = r.c.URLs[0]
}
s, err := newSendPackSession(o.RemoteURL, o.Auth, o.InsecureSkipTLS, o.CABundle)
if err != nil {
return err
}
defer ioutil.CheckClose(s, &err)
ar, err := s.AdvertisedReferencesContext(ctx)
if err != nil {
return err
}
remoteRefs, err := ar.AllReferences()
if err != nil {
return err
}
if err := r.checkRequireRemoteRefs(o.RequireRemoteRefs, remoteRefs); err != nil {
return err
}
isDelete := false
allDelete := true
for _, rs := range o.RefSpecs {
if rs.IsDelete() {
isDelete = true
} else {
allDelete = false
}
if isDelete && !allDelete {
break
}
}
if isDelete && !ar.Capabilities.Supports(capability.DeleteRefs) {
return ErrDeleteRefNotSupported
}
if o.Force {
for i := 0; i < len(o.RefSpecs); i++ {
rs := &o.RefSpecs[i]
if !rs.IsForceUpdate() && !rs.IsDelete() {
o.RefSpecs[i] = config.RefSpec("+" + rs.String())
}
}
}
localRefs, err := r.references()
if err != nil {
return err
}
req, err := r.newReferenceUpdateRequest(o, localRefs, remoteRefs, ar)
if err != nil {
return err
}
if len(req.Commands) == 0 {
return NoErrAlreadyUpToDate
}
objects := objectsToPush(req.Commands)
haves, err := referencesToHashes(remoteRefs)
if err != nil {
return err
}
stop, err := r.s.Shallow()
if err != nil {
return err
}
// if we have shallow we should include this as part of the objects that
// we are aware.
haves = append(haves, stop...)
var hashesToPush []plumbing.Hash
// Avoid the expensive revlist operation if we're only doing deletes.
if !allDelete {
if url.IsLocalEndpoint(o.RemoteURL) {
// If we're are pushing to a local repo, it might be much
// faster to use a local storage layer to get the commits
// to ignore, when calculating the object revlist.
localStorer := filesystem.NewStorage(
osfs.New(o.RemoteURL), cache.NewObjectLRUDefault())
hashesToPush, err = revlist.ObjectsWithStorageForIgnores(
r.s, localStorer, objects, haves)
} else {
hashesToPush, err = revlist.Objects(r.s, objects, haves)
}
if err != nil {
return err
}
}
if len(hashesToPush) == 0 {
allDelete = true
for _, command := range req.Commands {
if command.Action() != packp.Delete {
allDelete = false
break
}
}
}
rs, err := pushHashes(ctx, s, r.s, req, hashesToPush, r.useRefDeltas(ar), allDelete)
if err != nil {
return err
}
if err = rs.Error(); err != nil {
return err
}
return r.updateRemoteReferenceStorage(req, rs)
}
func (r *Remote) useRefDeltas(ar *packp.AdvRefs) bool {
return !ar.Capabilities.Supports(capability.OFSDelta)
}
func (r *Remote) addReachableTags(localRefs []*plumbing.Reference, remoteRefs storer.ReferenceStorer, req *packp.ReferenceUpdateRequest) error {
tags := make(map[plumbing.Reference]struct{})
// get a list of all tags locally
for _, ref := range localRefs {
if strings.HasPrefix(string(ref.Name()), "refs/tags") {
tags[*ref] = struct{}{}
}
}
remoteRefIter, err := remoteRefs.IterReferences()
if err != nil {
return err
}
// remove any that are already on the remote
if err := remoteRefIter.ForEach(func(reference *plumbing.Reference) error {
delete(tags, *reference)
return nil
}); err != nil {
return err
}
for tag := range tags {
tagObject, err := object.GetObject(r.s, tag.Hash())
var tagCommit *object.Commit
if err != nil {
return fmt.Errorf("get tag object: %w", err)
}
if tagObject.Type() != plumbing.TagObject {
continue
}
annotatedTag, ok := tagObject.(*object.Tag)
if !ok {
return errors.New("could not get annotated tag object")
}
tagCommit, err = object.GetCommit(r.s, annotatedTag.Target)
if err != nil {
return fmt.Errorf("get annotated tag commit: %w", err)
}
// only include tags that are reachable from one of the refs
// already being pushed
for _, cmd := range req.Commands {
if tag.Name() == cmd.Name {
continue
}
if strings.HasPrefix(cmd.Name.String(), "refs/tags") {
continue
}
c, err := object.GetCommit(r.s, cmd.New)
if err != nil {
return fmt.Errorf("get commit %v: %w", cmd.Name, err)
}
if isAncestor, err := tagCommit.IsAncestor(c); err == nil && isAncestor {
req.Commands = append(req.Commands, &packp.Command{Name: tag.Name(), New: tag.Hash()})
}
}
}
return nil
}
func (r *Remote) newReferenceUpdateRequest(
o *PushOptions,
localRefs []*plumbing.Reference,
remoteRefs storer.ReferenceStorer,
ar *packp.AdvRefs,
) (*packp.ReferenceUpdateRequest, error) {
req := packp.NewReferenceUpdateRequestFromCapabilities(ar.Capabilities)
if o.Progress != nil {
req.Progress = o.Progress
if ar.Capabilities.Supports(capability.Sideband64k) {
_ = req.Capabilities.Set(capability.Sideband64k)
} else if ar.Capabilities.Supports(capability.Sideband) {
_ = req.Capabilities.Set(capability.Sideband)
}
}
if ar.Capabilities.Supports(capability.PushOptions) {
_ = req.Capabilities.Set(capability.PushOptions)
for k, v := range o.Options {
req.Options = append(req.Options, &packp.Option{Key: k, Value: v})
}
}
if o.Atomic && ar.Capabilities.Supports(capability.Atomic) {
_ = req.Capabilities.Set(capability.Atomic)
}
if err := r.addReferencesToUpdate(o.RefSpecs, localRefs, remoteRefs, req, o.Prune, o.ForceWithLease); err != nil {
return nil, err
}
if o.FollowTags {
if err := r.addReachableTags(localRefs, remoteRefs, req); err != nil {
return nil, err
}
}
return req, nil
}
func (r *Remote) updateRemoteReferenceStorage(
req *packp.ReferenceUpdateRequest,
result *packp.ReportStatus,
) error {
for _, spec := range r.c.Fetch {
for _, c := range req.Commands {
if !spec.Match(c.Name) {
continue
}
local := spec.Dst(c.Name)
ref := plumbing.NewHashReference(local, c.New)
switch c.Action() {
case packp.Create, packp.Update:
if err := r.s.SetReference(ref); err != nil {
return err
}
case packp.Delete:
if err := r.s.RemoveReference(local); err != nil {
return err
}
}
}
}
return nil
}
// FetchContext fetches references along with the objects necessary to complete
// their histories.
//
// Returns nil if the operation is successful, NoErrAlreadyUpToDate if there are
// no changes to be fetched, or an error.
//
// The provided Context must be non-nil. If the context expires before the
// operation is complete, an error is returned. The context only affects the
// transport operations.
func (r *Remote) FetchContext(ctx context.Context, o *FetchOptions) error {
_, err := r.fetch(ctx, o)
return err
}
// Fetch fetches references along with the objects necessary to complete their
// histories.
//
// Returns nil if the operation is successful, NoErrAlreadyUpToDate if there are
// no changes to be fetched, or an error.
func (r *Remote) Fetch(o *FetchOptions) error {
return r.FetchContext(context.Background(), o)
}
func (r *Remote) fetch(ctx context.Context, o *FetchOptions) (sto storer.ReferenceStorer, err error) {
if o.RemoteName == "" {
o.RemoteName = r.c.Name
}
if err = o.Validate(); err != nil {
return nil, err
}
if len(o.RefSpecs) == 0 {
o.RefSpecs = r.c.Fetch
}
if o.RemoteURL == "" {
o.RemoteURL = r.c.URLs[0]
}
s, err := newUploadPackSession(o.RemoteURL, o.Auth, o.InsecureSkipTLS, o.CABundle)
if err != nil {
return nil, err
}
defer ioutil.CheckClose(s, &err)
ar, err := s.AdvertisedReferencesContext(ctx)
if err != nil {
return nil, err
}
req, err := r.newUploadPackRequest(o, ar)
if err != nil {
return nil, err
}
if err := r.isSupportedRefSpec(o.RefSpecs, ar); err != nil {
return nil, err
}
remoteRefs, err := ar.AllReferences()
if err != nil {
return nil, err
}
localRefs, err := r.references()
if err != nil {
return nil, err
}
refs, err := calculateRefs(o.RefSpecs, remoteRefs, o.Tags)
if err != nil {
return nil, err
}
if !req.Depth.IsZero() {
req.Shallows, err = r.s.Shallow()
if err != nil {
return nil, fmt.Errorf("existing checkout is not shallow")
}
}
req.Wants, err = getWants(r.s, refs)
if len(req.Wants) > 0 {
req.Haves, err = getHaves(localRefs, remoteRefs, r.s)
if err != nil {
return nil, err
}
if err = r.fetchPack(ctx, o, s, req); err != nil {
return nil, err
}
}
updated, err := r.updateLocalReferenceStorage(o.RefSpecs, refs, remoteRefs, o.Tags, o.Force)
if err != nil {
return nil, err
}
if !updated {
updated, err = depthChanged(req.Shallows, r.s)
if err != nil {
return nil, fmt.Errorf("error checking depth change: %v", err)
}
}
if !updated {
return remoteRefs, NoErrAlreadyUpToDate
}
return remoteRefs, nil
}
func depthChanged(before []plumbing.Hash, s storage.Storer) (bool, error) {
after, err := s.Shallow()
if err != nil {
return false, err
}
if len(before) != len(after) {
return true, nil
}
bm := make(map[plumbing.Hash]bool, len(before))
for _, b := range before {
bm[b] = true
}
for _, a := range after {
if _, ok := bm[a]; !ok {
return true, nil
}
}
return false, nil
}
func newUploadPackSession(url string, auth transport.AuthMethod, insecure bool, cabundle []byte) (transport.UploadPackSession, error) {
c, ep, err := newClient(url, auth, insecure, cabundle)
if err != nil {
return nil, err
}
return c.NewUploadPackSession(ep, auth)
}
func newSendPackSession(url string, auth transport.AuthMethod, insecure bool, cabundle []byte) (transport.ReceivePackSession, error) {
c, ep, err := newClient(url, auth, insecure, cabundle)
if err != nil {
return nil, err
}
return c.NewReceivePackSession(ep, auth)
}
func newClient(url string, auth transport.AuthMethod, insecure bool, cabundle []byte) (transport.Transport, *transport.Endpoint, error) {
ep, err := transport.NewEndpoint(url)
if err != nil {
return nil, nil, err
}
ep.InsecureSkipTLS = insecure
ep.CaBundle = cabundle
c, err := client.NewClient(ep)
if err != nil {
return nil, nil, err
}
return c, ep, err
}
func (r *Remote) fetchPack(ctx context.Context, o *FetchOptions, s transport.UploadPackSession,
req *packp.UploadPackRequest) (err error) {
reader, err := s.UploadPack(ctx, req)
if err != nil {
return err
}
defer ioutil.CheckClose(reader, &err)
if err = r.updateShallow(o, reader); err != nil {
return err
}
if err = packfile.UpdateObjectStorage(r.s,
buildSidebandIfSupported(req.Capabilities, reader, o.Progress),
); err != nil {
return err
}
return err
}
func (r *Remote) addReferencesToUpdate(
refspecs []config.RefSpec,
localRefs []*plumbing.Reference,
remoteRefs storer.ReferenceStorer,
req *packp.ReferenceUpdateRequest,
prune bool,
forceWithLease *ForceWithLease,
) error {
// This references dictionary will be used to search references by name.
refsDict := make(map[string]*plumbing.Reference)
for _, ref := range localRefs {
refsDict[ref.Name().String()] = ref
}
for _, rs := range refspecs {
if rs.IsDelete() {
if err := r.deleteReferences(rs, remoteRefs, refsDict, req, false); err != nil {
return err
}
} else {
err := r.addOrUpdateReferences(rs, localRefs, refsDict, remoteRefs, req, forceWithLease)
if err != nil {
return err
}
if prune {
if err := r.deleteReferences(rs, remoteRefs, refsDict, req, true); err != nil {
return err
}
}
}
}
return nil
}
func (r *Remote) addOrUpdateReferences(
rs config.RefSpec,
localRefs []*plumbing.Reference,
refsDict map[string]*plumbing.Reference,
remoteRefs storer.ReferenceStorer,
req *packp.ReferenceUpdateRequest,
forceWithLease *ForceWithLease,
) error {
// If it is not a wilcard refspec we can directly search for the reference
// in the references dictionary.
if !rs.IsWildcard() {
ref, ok := refsDict[rs.Src()]
if !ok {
commit, err := object.GetCommit(r.s, plumbing.NewHash(rs.Src()))
if err == nil {
return r.addCommit(rs, remoteRefs, commit.Hash, req)
}
return nil
}
return r.addReferenceIfRefSpecMatches(rs, remoteRefs, ref, req, forceWithLease)
}
for _, ref := range localRefs {
err := r.addReferenceIfRefSpecMatches(rs, remoteRefs, ref, req, forceWithLease)
if err != nil {
return err
}
}
return nil
}
func (r *Remote) deleteReferences(rs config.RefSpec,
remoteRefs storer.ReferenceStorer,
refsDict map[string]*plumbing.Reference,
req *packp.ReferenceUpdateRequest,
prune bool) error {
iter, err := remoteRefs.IterReferences()
if err != nil {
return err
}
return iter.ForEach(func(ref *plumbing.Reference) error {
if ref.Type() != plumbing.HashReference {
return nil
}
if prune {
rs := rs.Reverse()
if !rs.Match(ref.Name()) {
return nil
}
if _, ok := refsDict[rs.Dst(ref.Name()).String()]; ok {
return nil
}
} else if rs.Dst("") != ref.Name() {
return nil
}
cmd := &packp.Command{
Name: ref.Name(),
Old: ref.Hash(),
New: plumbing.ZeroHash,
}
req.Commands = append(req.Commands, cmd)
return nil
})
}
func (r *Remote) addCommit(rs config.RefSpec,
remoteRefs storer.ReferenceStorer, localCommit plumbing.Hash,
req *packp.ReferenceUpdateRequest) error {
if rs.IsWildcard() {
return errors.New("can't use wildcard together with hash refspecs")
}
cmd := &packp.Command{
Name: rs.Dst(""),
Old: plumbing.ZeroHash,
New: localCommit,
}
remoteRef, err := remoteRefs.Reference(cmd.Name)
if err == nil {
if remoteRef.Type() != plumbing.HashReference {
//TODO: check actual git behavior here
return nil
}
cmd.Old = remoteRef.Hash()
} else if err != plumbing.ErrReferenceNotFound {
return err
}
if cmd.Old == cmd.New {
return nil
}
if !rs.IsForceUpdate() {
if err := checkFastForwardUpdate(r.s, remoteRefs, cmd); err != nil {
return err
}
}
req.Commands = append(req.Commands, cmd)
return nil
}
func (r *Remote) addReferenceIfRefSpecMatches(rs config.RefSpec,
remoteRefs storer.ReferenceStorer, localRef *plumbing.Reference,
req *packp.ReferenceUpdateRequest, forceWithLease *ForceWithLease) error {
if localRef.Type() != plumbing.HashReference {
return nil
}
if !rs.Match(localRef.Name()) {
return nil
}
cmd := &packp.Command{
Name: rs.Dst(localRef.Name()),
Old: plumbing.ZeroHash,
New: localRef.Hash(),
}
remoteRef, err := remoteRefs.Reference(cmd.Name)
if err == nil {
if remoteRef.Type() != plumbing.HashReference {
//TODO: check actual git behavior here
return nil
}
cmd.Old = remoteRef.Hash()
} else if err != plumbing.ErrReferenceNotFound {
return err
}
if cmd.Old == cmd.New {
return nil
}
if forceWithLease != nil {
if err = r.checkForceWithLease(localRef, cmd, forceWithLease); err != nil {
return err
}
} else if !rs.IsForceUpdate() {
if err := checkFastForwardUpdate(r.s, remoteRefs, cmd); err != nil {
return err
}
}
req.Commands = append(req.Commands, cmd)
return nil
}
func (r *Remote) checkForceWithLease(localRef *plumbing.Reference, cmd *packp.Command, forceWithLease *ForceWithLease) error {
remotePrefix := fmt.Sprintf("refs/remotes/%s/", r.Config().Name)
ref, err := storer.ResolveReference(
r.s,
plumbing.ReferenceName(remotePrefix+strings.Replace(localRef.Name().String(), "refs/heads/", "", -1)))
if err != nil {
return err
}
if forceWithLease.RefName.String() == "" || (forceWithLease.RefName == cmd.Name) {
expectedOID := ref.Hash()
if !forceWithLease.Hash.IsZero() {
expectedOID = forceWithLease.Hash
}
if cmd.Old != expectedOID {
return fmt.Errorf("non-fast-forward update: %s", cmd.Name.String())
}
}
return nil
}
func (r *Remote) references() ([]*plumbing.Reference, error) {
var localRefs []*plumbing.Reference
iter, err := r.s.IterReferences()
if err != nil {
return nil, err
}
for {
ref, err := iter.Next()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
localRefs = append(localRefs, ref)
}
return localRefs, nil
}
func getRemoteRefsFromStorer(remoteRefStorer storer.ReferenceStorer) (
map[plumbing.Hash]bool, error) {
remoteRefs := map[plumbing.Hash]bool{}
iter, err := remoteRefStorer.IterReferences()
if err != nil {
return nil, err
}
err = iter.ForEach(func(ref *plumbing.Reference) error {
if ref.Type() != plumbing.HashReference {
return nil
}
remoteRefs[ref.Hash()] = true
return nil
})
if err != nil {
return nil, err
}
return remoteRefs, nil
}
// getHavesFromRef populates the given `haves` map with the given
// reference, and up to `maxHavesToVisitPerRef` ancestor commits.
func getHavesFromRef(
ref *plumbing.Reference,
remoteRefs map[plumbing.Hash]bool,
s storage.Storer,
haves map[plumbing.Hash]bool,
) error {
h := ref.Hash()
if haves[h] {
return nil
}
// No need to load the commit if we know the remote already
// has this hash.
if remoteRefs[h] {
haves[h] = true
return nil
}
commit, err := object.GetCommit(s, h)
if err != nil {
// Ignore the error if this isn't a commit.
haves[ref.Hash()] = true
return nil
}
// Until go-git supports proper commit negotiation during an
// upload pack request, include up to `maxHavesToVisitPerRef`
// commits from the history of each ref.
walker := object.NewCommitPreorderIter(commit, haves, nil)
toVisit := maxHavesToVisitPerRef
return walker.ForEach(func(c *object.Commit) error {
haves[c.Hash] = true
toVisit--
// If toVisit starts out at 0 (indicating there is no
// max), then it will be negative here and we won't stop
// early.
if toVisit == 0 || remoteRefs[c.Hash] {
return storer.ErrStop
}
return nil
})
}
func getHaves(
localRefs []*plumbing.Reference,
remoteRefStorer storer.ReferenceStorer,
s storage.Storer,
) ([]plumbing.Hash, error) {
haves := map[plumbing.Hash]bool{}
// Build a map of all the remote references, to avoid loading too
// many parent commits for references we know don't need to be
// transferred.
remoteRefs, err := getRemoteRefsFromStorer(remoteRefStorer)
if err != nil {
return nil, err
}
for _, ref := range localRefs {
if haves[ref.Hash()] {
continue
}
if ref.Type() != plumbing.HashReference {
continue
}
err = getHavesFromRef(ref, remoteRefs, s, haves)
if err != nil {
return nil, err
}
}
var result []plumbing.Hash
for h := range haves {
result = append(result, h)
}
return result, nil
}
const refspecAllTags = "+refs/tags/*:refs/tags/*"
func calculateRefs(
spec []config.RefSpec,
remoteRefs storer.ReferenceStorer,
tagMode TagMode,
) (memory.ReferenceStorage, error) {
if tagMode == AllTags {
spec = append(spec, refspecAllTags)
}
refs := make(memory.ReferenceStorage)
for _, s := range spec {
if err := doCalculateRefs(s, remoteRefs, refs); err != nil {
return nil, err
}
}
return refs, nil
}
func doCalculateRefs(
s config.RefSpec,
remoteRefs storer.ReferenceStorer,
refs memory.ReferenceStorage,
) error {
iter, err := remoteRefs.IterReferences()
if err != nil {
return err
}
if s.IsExactSHA1() {
ref := plumbing.NewHashReference(s.Dst(""), plumbing.NewHash(s.Src()))
return refs.SetReference(ref)
}
var matched bool
err = iter.ForEach(func(ref *plumbing.Reference) error {
if !s.Match(ref.Name()) {
return nil
}
if ref.Type() == plumbing.SymbolicReference {
target, err := storer.ResolveReference(remoteRefs, ref.Name())
if err != nil {
return err
}
ref = plumbing.NewHashReference(ref.Name(), target.Hash())
}
if ref.Type() != plumbing.HashReference {
return nil
}
matched = true
if err := refs.SetReference(ref); err != nil {
return err
}
if !s.IsWildcard() {
return storer.ErrStop
}
return nil
})
if !matched && !s.IsWildcard() {
return NoMatchingRefSpecError{refSpec: s}
}
return err
}
func getWants(localStorer storage.Storer, refs memory.ReferenceStorage) ([]plumbing.Hash, error) {
shallow := false
if s, _ := localStorer.Shallow(); len(s) > 0 {
shallow = true
}
wants := map[plumbing.Hash]bool{}
for _, ref := range refs {
hash := ref.Hash()
exists, err := objectExists(localStorer, ref.Hash())
if err != nil {
return nil, err
}
if !exists || shallow {
wants[hash] = true