1078 lines
23 KiB
Go
1078 lines
23 KiB
Go
package git
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"gopkg.in/src-d/go-billy.v4/osfs"
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"gopkg.in/src-d/go-git.v4/config"
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"gopkg.in/src-d/go-git.v4/plumbing"
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"gopkg.in/src-d/go-git.v4/plumbing/cache"
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"gopkg.in/src-d/go-git.v4/plumbing/format/packfile"
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"gopkg.in/src-d/go-git.v4/plumbing/object"
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"gopkg.in/src-d/go-git.v4/plumbing/protocol/packp"
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"gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/capability"
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"gopkg.in/src-d/go-git.v4/plumbing/protocol/packp/sideband"
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"gopkg.in/src-d/go-git.v4/plumbing/revlist"
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"gopkg.in/src-d/go-git.v4/plumbing/storer"
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"gopkg.in/src-d/go-git.v4/plumbing/transport"
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"gopkg.in/src-d/go-git.v4/plumbing/transport/client"
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"gopkg.in/src-d/go-git.v4/storage"
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"gopkg.in/src-d/go-git.v4/storage/filesystem"
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"gopkg.in/src-d/go-git.v4/storage/memory"
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"gopkg.in/src-d/go-git.v4/utils/ioutil"
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)
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var (
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NoErrAlreadyUpToDate = errors.New("already up-to-date")
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ErrDeleteRefNotSupported = errors.New("server does not support delete-refs")
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ErrForceNeeded = errors.New("some refs were not updated")
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)
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const (
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// This describes the maximum number of commits to walk when
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// computing the haves to send to a server, for each ref in the
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// repo containing this remote, when not using the multi-ack
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// protocol. Setting this to 0 means there is no limit.
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maxHavesToVisitPerRef = 100
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)
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// Remote represents a connection to a remote repository.
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type Remote struct {
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c *config.RemoteConfig
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s storage.Storer
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}
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// NewRemote creates a new Remote.
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// The intended purpose is to use the Remote for tasks such as listing remote references (like using git ls-remote).
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// Otherwise Remotes should be created via the use of a Repository.
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func NewRemote(s storage.Storer, c *config.RemoteConfig) *Remote {
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return &Remote{s: s, c: c}
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}
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// Config returns the RemoteConfig object used to instantiate this Remote.
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func (r *Remote) Config() *config.RemoteConfig {
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return r.c
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}
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func (r *Remote) String() string {
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var fetch, push string
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if len(r.c.URLs) > 0 {
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fetch = r.c.URLs[0]
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push = r.c.URLs[0]
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}
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return fmt.Sprintf("%s\t%s (fetch)\n%[1]s\t%[3]s (push)", r.c.Name, fetch, push)
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}
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// Push performs a push to the remote. Returns NoErrAlreadyUpToDate if the
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// remote was already up-to-date.
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func (r *Remote) Push(o *PushOptions) error {
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return r.PushContext(context.Background(), o)
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}
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// PushContext performs a push to the remote. Returns NoErrAlreadyUpToDate if
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// the remote was already up-to-date.
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//
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// The provided Context must be non-nil. If the context expires before the
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// operation is complete, an error is returned. The context only affects to the
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// transport operations.
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func (r *Remote) PushContext(ctx context.Context, o *PushOptions) (err error) {
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if err := o.Validate(); err != nil {
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return err
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}
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if o.RemoteName != r.c.Name {
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return fmt.Errorf("remote names don't match: %s != %s", o.RemoteName, r.c.Name)
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}
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s, err := newSendPackSession(r.c.URLs[0], o.Auth)
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if err != nil {
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return err
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}
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defer ioutil.CheckClose(s, &err)
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ar, err := s.AdvertisedReferences()
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if err != nil {
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return err
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}
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remoteRefs, err := ar.AllReferences()
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if err != nil {
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return err
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}
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isDelete := false
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allDelete := true
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for _, rs := range o.RefSpecs {
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if rs.IsDelete() {
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isDelete = true
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} else {
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allDelete = false
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}
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if isDelete && !allDelete {
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break
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}
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}
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if isDelete && !ar.Capabilities.Supports(capability.DeleteRefs) {
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return ErrDeleteRefNotSupported
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}
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localRefs, err := r.references()
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if err != nil {
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return err
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}
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req, err := r.newReferenceUpdateRequest(o, localRefs, remoteRefs, ar)
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if err != nil {
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return err
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}
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if len(req.Commands) == 0 {
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return NoErrAlreadyUpToDate
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}
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objects := objectsToPush(req.Commands)
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haves, err := referencesToHashes(remoteRefs)
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if err != nil {
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return err
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}
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stop, err := r.s.Shallow()
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if err != nil {
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return err
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}
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// if we have shallow we should include this as part of the objects that
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// we are aware.
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haves = append(haves, stop...)
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var hashesToPush []plumbing.Hash
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// Avoid the expensive revlist operation if we're only doing deletes.
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if !allDelete {
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if r.c.IsFirstURLLocal() {
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// If we're are pushing to a local repo, it might be much
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// faster to use a local storage layer to get the commits
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// to ignore, when calculating the object revlist.
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localStorer := filesystem.NewStorage(
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osfs.New(r.c.URLs[0]), cache.NewObjectLRUDefault())
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hashesToPush, err = revlist.ObjectsWithStorageForIgnores(
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r.s, localStorer, objects, haves)
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} else {
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hashesToPush, err = revlist.Objects(r.s, objects, haves)
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}
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if err != nil {
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return err
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}
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}
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rs, err := pushHashes(ctx, s, r.s, req, hashesToPush, r.useRefDeltas(ar))
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if err != nil {
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return err
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}
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if err = rs.Error(); err != nil {
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return err
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}
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return r.updateRemoteReferenceStorage(req, rs)
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}
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func (r *Remote) useRefDeltas(ar *packp.AdvRefs) bool {
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return !ar.Capabilities.Supports(capability.OFSDelta)
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}
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func (r *Remote) newReferenceUpdateRequest(
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o *PushOptions,
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localRefs []*plumbing.Reference,
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remoteRefs storer.ReferenceStorer,
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ar *packp.AdvRefs,
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) (*packp.ReferenceUpdateRequest, error) {
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req := packp.NewReferenceUpdateRequestFromCapabilities(ar.Capabilities)
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if o.Progress != nil {
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req.Progress = o.Progress
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if ar.Capabilities.Supports(capability.Sideband64k) {
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req.Capabilities.Set(capability.Sideband64k)
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} else if ar.Capabilities.Supports(capability.Sideband) {
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req.Capabilities.Set(capability.Sideband)
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}
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}
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if err := r.addReferencesToUpdate(o.RefSpecs, localRefs, remoteRefs, req); err != nil {
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return nil, err
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}
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return req, nil
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}
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func (r *Remote) updateRemoteReferenceStorage(
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req *packp.ReferenceUpdateRequest,
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result *packp.ReportStatus,
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) error {
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for _, spec := range r.c.Fetch {
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for _, c := range req.Commands {
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if !spec.Match(c.Name) {
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continue
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}
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local := spec.Dst(c.Name)
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ref := plumbing.NewHashReference(local, c.New)
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switch c.Action() {
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case packp.Create, packp.Update:
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if err := r.s.SetReference(ref); err != nil {
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return err
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}
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case packp.Delete:
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if err := r.s.RemoveReference(local); err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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// FetchContext fetches references along with the objects necessary to complete
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// their histories.
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//
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// Returns nil if the operation is successful, NoErrAlreadyUpToDate if there are
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// no changes to be fetched, or an error.
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//
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// The provided Context must be non-nil. If the context expires before the
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// operation is complete, an error is returned. The context only affects to the
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// transport operations.
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func (r *Remote) FetchContext(ctx context.Context, o *FetchOptions) error {
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_, err := r.fetch(ctx, o)
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return err
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}
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// Fetch fetches references along with the objects necessary to complete their
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// histories.
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//
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// Returns nil if the operation is successful, NoErrAlreadyUpToDate if there are
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// no changes to be fetched, or an error.
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func (r *Remote) Fetch(o *FetchOptions) error {
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return r.FetchContext(context.Background(), o)
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}
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func (r *Remote) fetch(ctx context.Context, o *FetchOptions) (sto storer.ReferenceStorer, err error) {
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if o.RemoteName == "" {
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o.RemoteName = r.c.Name
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}
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if err = o.Validate(); err != nil {
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return nil, err
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}
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if len(o.RefSpecs) == 0 {
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o.RefSpecs = r.c.Fetch
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}
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s, err := newUploadPackSession(r.c.URLs[0], o.Auth)
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if err != nil {
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return nil, err
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}
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defer ioutil.CheckClose(s, &err)
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ar, err := s.AdvertisedReferences()
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if err != nil {
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return nil, err
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}
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req, err := r.newUploadPackRequest(o, ar)
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if err != nil {
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return nil, err
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}
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remoteRefs, err := ar.AllReferences()
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if err != nil {
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return nil, err
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}
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localRefs, err := r.references()
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if err != nil {
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return nil, err
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}
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refs, err := calculateRefs(o.RefSpecs, remoteRefs, o.Tags)
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if err != nil {
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return nil, err
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}
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req.Wants, err = getWants(r.s, refs)
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if len(req.Wants) > 0 {
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req.Haves, err = getHaves(localRefs, remoteRefs, r.s)
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if err != nil {
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return nil, err
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}
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if err = r.fetchPack(ctx, o, s, req); err != nil {
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return nil, err
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}
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}
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updated, err := r.updateLocalReferenceStorage(o.RefSpecs, refs, remoteRefs, o.Tags, o.Force)
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if err != nil {
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return nil, err
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}
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if !updated {
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return remoteRefs, NoErrAlreadyUpToDate
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}
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return remoteRefs, nil
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}
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func newUploadPackSession(url string, auth transport.AuthMethod) (transport.UploadPackSession, error) {
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c, ep, err := newClient(url)
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if err != nil {
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return nil, err
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}
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return c.NewUploadPackSession(ep, auth)
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}
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func newSendPackSession(url string, auth transport.AuthMethod) (transport.ReceivePackSession, error) {
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c, ep, err := newClient(url)
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if err != nil {
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return nil, err
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}
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return c.NewReceivePackSession(ep, auth)
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}
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func newClient(url string) (transport.Transport, *transport.Endpoint, error) {
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ep, err := transport.NewEndpoint(url)
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if err != nil {
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return nil, nil, err
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}
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c, err := client.NewClient(ep)
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if err != nil {
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return nil, nil, err
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}
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return c, ep, err
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}
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func (r *Remote) fetchPack(ctx context.Context, o *FetchOptions, s transport.UploadPackSession,
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req *packp.UploadPackRequest) (err error) {
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reader, err := s.UploadPack(ctx, req)
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if err != nil {
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return err
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}
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defer ioutil.CheckClose(reader, &err)
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if err = r.updateShallow(o, reader); err != nil {
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return err
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}
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if err = packfile.UpdateObjectStorage(r.s,
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buildSidebandIfSupported(req.Capabilities, reader, o.Progress),
|
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); err != nil {
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return err
|
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}
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return err
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}
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func (r *Remote) addReferencesToUpdate(
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refspecs []config.RefSpec,
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localRefs []*plumbing.Reference,
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remoteRefs storer.ReferenceStorer,
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req *packp.ReferenceUpdateRequest,
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) error {
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// This references dictionary will be used to search references by name.
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refsDict := make(map[string]*plumbing.Reference)
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for _, ref := range localRefs {
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refsDict[ref.Name().String()] = ref
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}
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for _, rs := range refspecs {
|
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if rs.IsDelete() {
|
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if err := r.deleteReferences(rs, remoteRefs, req); err != nil {
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return err
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}
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} else {
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err := r.addOrUpdateReferences(rs, localRefs, refsDict, remoteRefs, req)
|
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if err != nil {
|
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return err
|
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}
|
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}
|
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}
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|
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return nil
|
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}
|
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|
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func (r *Remote) addOrUpdateReferences(
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rs config.RefSpec,
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localRefs []*plumbing.Reference,
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refsDict map[string]*plumbing.Reference,
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remoteRefs storer.ReferenceStorer,
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req *packp.ReferenceUpdateRequest,
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) error {
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// If it is not a wilcard refspec we can directly search for the reference
|
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// in the references dictionary.
|
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if !rs.IsWildcard() {
|
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ref, ok := refsDict[rs.Src()]
|
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if !ok {
|
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return nil
|
|
}
|
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|
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return r.addReferenceIfRefSpecMatches(rs, remoteRefs, ref, req)
|
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}
|
|
|
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for _, ref := range localRefs {
|
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err := r.addReferenceIfRefSpecMatches(rs, remoteRefs, ref, req)
|
|
if err != nil {
|
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return err
|
|
}
|
|
}
|
|
|
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return nil
|
|
}
|
|
|
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func (r *Remote) deleteReferences(rs config.RefSpec,
|
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remoteRefs storer.ReferenceStorer, req *packp.ReferenceUpdateRequest) error {
|
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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 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) addReferenceIfRefSpecMatches(rs config.RefSpec,
|
|
remoteRefs storer.ReferenceStorer, localRef *plumbing.Reference,
|
|
req *packp.ReferenceUpdateRequest) 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 !rs.IsForceUpdate() {
|
|
if err := checkFastForwardUpdate(r.s, remoteRefs, cmd); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
req.Commands = append(req.Commands, cmd)
|
|
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
|
|
}
|
|
|
|
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 fmt.Errorf("couldn't find remote ref %q", s.Src())
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
func getWants(localStorer storage.Storer, refs memory.ReferenceStorage) ([]plumbing.Hash, error) {
|
|
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 {
|
|
wants[hash] = true
|
|
}
|
|
}
|
|
|
|
var result []plumbing.Hash
|
|
for h := range wants {
|
|
result = append(result, h)
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
func objectExists(s storer.EncodedObjectStorer, h plumbing.Hash) (bool, error) {
|
|
_, err := s.EncodedObject(plumbing.AnyObject, h)
|
|
if err == plumbing.ErrObjectNotFound {
|
|
return false, nil
|
|
}
|
|
|
|
return true, err
|
|
}
|
|
|
|
func checkFastForwardUpdate(s storer.EncodedObjectStorer, remoteRefs storer.ReferenceStorer, cmd *packp.Command) error {
|
|
if cmd.Old == plumbing.ZeroHash {
|
|
_, err := remoteRefs.Reference(cmd.Name)
|
|
if err == plumbing.ErrReferenceNotFound {
|
|
return nil
|
|
}
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return fmt.Errorf("non-fast-forward update: %s", cmd.Name.String())
|
|
}
|
|
|
|
ff, err := isFastForward(s, cmd.Old, cmd.New)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !ff {
|
|
return fmt.Errorf("non-fast-forward update: %s", cmd.Name.String())
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func isFastForward(s storer.EncodedObjectStorer, old, new plumbing.Hash) (bool, error) {
|
|
c, err := object.GetCommit(s, new)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
found := false
|
|
iter := object.NewCommitPreorderIter(c, nil, nil)
|
|
err = iter.ForEach(func(c *object.Commit) error {
|
|
if c.Hash != old {
|
|
return nil
|
|
}
|
|
|
|
found = true
|
|
return storer.ErrStop
|
|
})
|
|
return found, err
|
|
}
|
|
|
|
func (r *Remote) newUploadPackRequest(o *FetchOptions,
|
|
ar *packp.AdvRefs) (*packp.UploadPackRequest, error) {
|
|
|
|
req := packp.NewUploadPackRequestFromCapabilities(ar.Capabilities)
|
|
|
|
if o.Depth != 0 {
|
|
req.Depth = packp.DepthCommits(o.Depth)
|
|
if err := req.Capabilities.Set(capability.Shallow); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if o.Progress == nil && ar.Capabilities.Supports(capability.NoProgress) {
|
|
if err := req.Capabilities.Set(capability.NoProgress); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
isWildcard := true
|
|
for _, s := range o.RefSpecs {
|
|
if !s.IsWildcard() {
|
|
isWildcard = false
|
|
break
|
|
}
|
|
}
|
|
|
|
if isWildcard && o.Tags == TagFollowing && ar.Capabilities.Supports(capability.IncludeTag) {
|
|
if err := req.Capabilities.Set(capability.IncludeTag); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return req, nil
|
|
}
|
|
|
|
func buildSidebandIfSupported(l *capability.List, reader io.Reader, p sideband.Progress) io.Reader {
|
|
var t sideband.Type
|
|
|
|
switch {
|
|
case l.Supports(capability.Sideband):
|
|
t = sideband.Sideband
|
|
case l.Supports(capability.Sideband64k):
|
|
t = sideband.Sideband64k
|
|
default:
|
|
return reader
|
|
}
|
|
|
|
d := sideband.NewDemuxer(t, reader)
|
|
d.Progress = p
|
|
|
|
return d
|
|
}
|
|
|
|
func (r *Remote) updateLocalReferenceStorage(
|
|
specs []config.RefSpec,
|
|
fetchedRefs, remoteRefs memory.ReferenceStorage,
|
|
tagMode TagMode,
|
|
force bool,
|
|
) (updated bool, err error) {
|
|
isWildcard := true
|
|
forceNeeded := false
|
|
|
|
for _, spec := range specs {
|
|
if !spec.IsWildcard() {
|
|
isWildcard = false
|
|
}
|
|
|
|
for _, ref := range fetchedRefs {
|
|
if !spec.Match(ref.Name()) {
|
|
continue
|
|
}
|
|
|
|
if ref.Type() != plumbing.HashReference {
|
|
continue
|
|
}
|
|
|
|
localName := spec.Dst(ref.Name())
|
|
old, _ := storer.ResolveReference(r.s, localName)
|
|
new := plumbing.NewHashReference(localName, ref.Hash())
|
|
|
|
// If the ref exists locally as a branch and force is not specified,
|
|
// only update if the new ref is an ancestor of the old
|
|
if old != nil && old.Name().IsBranch() && !force && !spec.IsForceUpdate() {
|
|
ff, err := isFastForward(r.s, old.Hash(), new.Hash())
|
|
if err != nil {
|
|
return updated, err
|
|
}
|
|
|
|
if !ff {
|
|
forceNeeded = true
|
|
continue
|
|
}
|
|
}
|
|
|
|
refUpdated, err := checkAndUpdateReferenceStorerIfNeeded(r.s, new, old)
|
|
if err != nil {
|
|
return updated, err
|
|
}
|
|
|
|
if refUpdated {
|
|
updated = true
|
|
}
|
|
}
|
|
}
|
|
|
|
if tagMode == NoTags {
|
|
return updated, nil
|
|
}
|
|
|
|
tags := fetchedRefs
|
|
if isWildcard {
|
|
tags = remoteRefs
|
|
}
|
|
tagUpdated, err := r.buildFetchedTags(tags)
|
|
if err != nil {
|
|
return updated, err
|
|
}
|
|
|
|
if tagUpdated {
|
|
updated = true
|
|
}
|
|
|
|
if err == nil && forceNeeded {
|
|
err = ErrForceNeeded
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (r *Remote) buildFetchedTags(refs memory.ReferenceStorage) (updated bool, err error) {
|
|
for _, ref := range refs {
|
|
if !ref.Name().IsTag() {
|
|
continue
|
|
}
|
|
|
|
_, err := r.s.EncodedObject(plumbing.AnyObject, ref.Hash())
|
|
if err == plumbing.ErrObjectNotFound {
|
|
continue
|
|
}
|
|
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
refUpdated, err := updateReferenceStorerIfNeeded(r.s, ref)
|
|
if err != nil {
|
|
return updated, err
|
|
}
|
|
|
|
if refUpdated {
|
|
updated = true
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
// List the references on the remote repository.
|
|
func (r *Remote) List(o *ListOptions) (rfs []*plumbing.Reference, err error) {
|
|
s, err := newUploadPackSession(r.c.URLs[0], o.Auth)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
defer ioutil.CheckClose(s, &err)
|
|
|
|
ar, err := s.AdvertisedReferences()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
allRefs, err := ar.AllReferences()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
refs, err := allRefs.IterReferences()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var resultRefs []*plumbing.Reference
|
|
refs.ForEach(func(ref *plumbing.Reference) error {
|
|
resultRefs = append(resultRefs, ref)
|
|
return nil
|
|
})
|
|
|
|
return resultRefs, nil
|
|
}
|
|
|
|
func objectsToPush(commands []*packp.Command) []plumbing.Hash {
|
|
var objects []plumbing.Hash
|
|
for _, cmd := range commands {
|
|
if cmd.New == plumbing.ZeroHash {
|
|
continue
|
|
}
|
|
|
|
objects = append(objects, cmd.New)
|
|
}
|
|
return objects
|
|
}
|
|
|
|
func referencesToHashes(refs storer.ReferenceStorer) ([]plumbing.Hash, error) {
|
|
iter, err := refs.IterReferences()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var hs []plumbing.Hash
|
|
err = iter.ForEach(func(ref *plumbing.Reference) error {
|
|
if ref.Type() != plumbing.HashReference {
|
|
return nil
|
|
}
|
|
|
|
hs = append(hs, ref.Hash())
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return hs, nil
|
|
}
|
|
|
|
func pushHashes(
|
|
ctx context.Context,
|
|
sess transport.ReceivePackSession,
|
|
s storage.Storer,
|
|
req *packp.ReferenceUpdateRequest,
|
|
hs []plumbing.Hash,
|
|
useRefDeltas bool,
|
|
) (*packp.ReportStatus, error) {
|
|
|
|
rd, wr := io.Pipe()
|
|
req.Packfile = rd
|
|
config, err := s.Config()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Set buffer size to 1 so the error message can be written when
|
|
// ReceivePack fails. Otherwise the goroutine will be blocked writing
|
|
// to the channel.
|
|
done := make(chan error, 1)
|
|
|
|
go func() {
|
|
e := packfile.NewEncoder(wr, s, useRefDeltas)
|
|
if _, err := e.Encode(hs, config.Pack.Window); err != nil {
|
|
done <- wr.CloseWithError(err)
|
|
return
|
|
}
|
|
|
|
done <- wr.Close()
|
|
}()
|
|
|
|
rs, err := sess.ReceivePack(ctx, req)
|
|
if err != nil {
|
|
// close the pipe to unlock encode write
|
|
_ = rd.Close()
|
|
return nil, err
|
|
}
|
|
|
|
if err := <-done; err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return rs, nil
|
|
}
|
|
|
|
func (r *Remote) updateShallow(o *FetchOptions, resp *packp.UploadPackResponse) error {
|
|
if o.Depth == 0 || len(resp.Shallows) == 0 {
|
|
return nil
|
|
}
|
|
|
|
shallows, err := r.s.Shallow()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
outer:
|
|
for _, s := range resp.Shallows {
|
|
for _, oldS := range shallows {
|
|
if s == oldS {
|
|
continue outer
|
|
}
|
|
}
|
|
shallows = append(shallows, s)
|
|
}
|
|
|
|
return r.s.SetShallow(shallows)
|
|
}
|