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package remote
import (
"bufio"
"context"
"strings"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const headPrefix = "HEAD branch: "
func (s *server) findRemoteRootRef(ctx context.Context, repo *gitalypb.Repository, remote string) (string, error) {
cmd, err := s.gitCmdFactory.New(ctx, repo,
git.SubSubCmd{
Name: "remote",
Action: "show",
Args: []string{remote},
},
git.WithRefTxHook(ctx, repo, s.cfg),
)
if err != nil {
return "", err
}
scanner := bufio.NewScanner(cmd)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if strings.HasPrefix(line, headPrefix) {
return strings.TrimPrefix(line, headPrefix), nil
}
}
if err := scanner.Err(); err != nil {
return "", err
}
if err := cmd.Wait(); err != nil {
return "", err
}
return "", status.Error(codes.NotFound, "couldn't query the remote HEAD")
}
// FindRemoteRootRef queries the remote to determine its HEAD
func (s *server) FindRemoteRootRef(ctx context.Context, in *gitalypb.FindRemoteRootRefRequest) (*gitalypb.FindRemoteRootRefResponse, error) {
remote := in.GetRemote()
if remote == "" {
return nil, status.Error(codes.InvalidArgument, "empty remote can't be queried")
}
ref, err := s.findRemoteRootRef(ctx, in.GetRepository(), remote)
if err != nil {
if _, ok := status.FromError(err); ok {
return nil, err
}
return nil, status.Errorf(codes.Internal, err.Error())
}
return &gitalypb.FindRemoteRootRefResponse{Ref: ref}, nil
}
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