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package remote
import (
"context"
"fmt"
"github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/ctxlogrus"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/gitalyssh"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/internal/metadata/featureflag"
"gitlab.com/gitlab-org/gitaly/internal/rubyserver"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const (
gitalyInternalURL = "ssh://gitaly/internal.git"
mirrorRefSpec = "+refs/*:refs/*"
)
// FetchInternalRemote fetches another Gitaly repository set as a remote
func (s *server) FetchInternalRemote(ctx context.Context, req *gitalypb.FetchInternalRemoteRequest) (*gitalypb.FetchInternalRemoteResponse, error) {
if err := validateFetchInternalRemoteRequest(req); err != nil {
return nil, status.Errorf(codes.InvalidArgument, "FetchInternalRemote: %v", err)
}
if featureflag.IsDisabled(ctx, featureflag.GoFetchInternalRemote) {
return s.rubyFetchInternalRemote(ctx, req)
}
env, err := gitalyssh.UploadPackEnv(ctx, &gitalypb.SSHUploadPackRequest{Repository: req.RemoteRepository})
if err != nil {
return nil, err
}
repoPath, err := helper.GetRepoPath(req.Repository)
if err != nil {
return nil, err
}
cmd, err := git.SafeBareCmd(ctx, git.CmdStream{}, env,
[]git.Option{git.ValueFlag{"--git-dir", repoPath}},
git.SubCmd{
Name: "fetch",
Flags: []git.Option{git.Flag{"--prune"}},
Args: []string{gitalyInternalURL, mirrorRefSpec},
},
)
if err != nil {
return nil, err
}
if err := cmd.Wait(); err != nil {
// Design quirk: if the fetch fails, this RPC returns Result: false, but no error.
ctxlogrus.Extract(ctx).WithError(err).Warn("git fetch failed")
return &gitalypb.FetchInternalRemoteResponse{Result: false}, nil
}
return &gitalypb.FetchInternalRemoteResponse{Result: true}, nil
}
func (s *server) rubyFetchInternalRemote(ctx context.Context, req *gitalypb.FetchInternalRemoteRequest) (*gitalypb.FetchInternalRemoteResponse, error) {
client, err := s.ruby.RemoteServiceClient(ctx)
if err != nil {
return nil, err
}
clientCtx, err := rubyserver.SetHeaders(ctx, req.GetRepository())
if err != nil {
return nil, err
}
return client.FetchInternalRemote(clientCtx, req)
}
func validateFetchInternalRemoteRequest(req *gitalypb.FetchInternalRemoteRequest) error {
if req.GetRepository() == nil {
return fmt.Errorf("empty Repository")
}
if req.GetRemoteRepository() == nil {
return fmt.Errorf("empty Remote Repository")
}
return nil
}
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