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package repository
import (
"bytes"
"context"
"fmt"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/git/localrepo"
"gitlab.com/gitlab-org/gitaly/internal/git/updateref"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/v14/proto/go/gitalypb"
)
func (s *server) WriteRef(ctx context.Context, req *gitalypb.WriteRefRequest) (*gitalypb.WriteRefResponse, error) {
if err := validateWriteRefRequest(req); err != nil {
return nil, helper.ErrInvalidArgument(err)
}
if err := s.writeRef(ctx, req); err != nil {
return nil, helper.ErrInternal(err)
}
return &gitalypb.WriteRefResponse{}, nil
}
func (s *server) writeRef(ctx context.Context, req *gitalypb.WriteRefRequest) error {
repo := s.localrepo(req.GetRepository())
if string(req.Ref) == "HEAD" {
if err := repo.SetDefaultBranch(ctx, s.txManager, git.ReferenceName(req.GetRevision())); err != nil {
return fmt.Errorf("setting default branch: %v", err)
}
return nil
}
return updateRef(ctx, repo, req)
}
func updateRef(ctx context.Context, repo *localrepo.Repo, req *gitalypb.WriteRefRequest) error {
u, err := updateref.New(ctx, repo)
if err != nil {
return fmt.Errorf("error when running creating new updater: %v", err)
}
if err = u.Update(git.ReferenceName(req.GetRef()), string(req.GetRevision()), string(req.GetOldRevision())); err != nil {
return fmt.Errorf("error when creating update-ref command: %v", err)
}
if err = u.Commit(); err != nil {
return fmt.Errorf("error when running update-ref command: %v", err)
}
return nil
}
func validateWriteRefRequest(req *gitalypb.WriteRefRequest) error {
if err := git.ValidateRevision(req.Ref); err != nil {
return fmt.Errorf("invalid ref: %v", err)
}
if err := git.ValidateRevision(req.Revision); err != nil {
return fmt.Errorf("invalid revision: %v", err)
}
if len(req.OldRevision) > 0 {
if err := git.ValidateRevision(req.OldRevision); err != nil {
return fmt.Errorf("invalid OldRevision: %v", err)
}
}
if !bytes.Equal(req.Ref, []byte("HEAD")) && !bytes.HasPrefix(req.Ref, []byte("refs/")) {
return fmt.Errorf("ref has to be a full reference")
}
return nil
}
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