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package remote
import (
"bufio"
"context"
"fmt"
"strings"
"gitlab.com/gitlab-org/gitaly/v15/internal/git"
"gitlab.com/gitlab-org/gitaly/v15/internal/helper"
"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
const headPrefix = "HEAD branch: "
func (s *server) findRemoteRootRef(ctx context.Context, request *gitalypb.FindRemoteRootRefRequest) (string, error) {
config := []git.ConfigPair{
{Key: "remote.inmemory.url", Value: request.RemoteUrl},
}
if authHeader := request.GetHttpAuthorizationHeader(); authHeader != "" {
config = append(config, git.ConfigPair{
Key: fmt.Sprintf("http.%s.extraHeader", request.RemoteUrl),
Value: "Authorization: " + authHeader,
})
}
if host := request.GetHttpHost(); host != "" {
configPair, err := git.GetCurloptResolveConfig(request.RemoteUrl, host)
// ignore the error since this only works for http/https
if err == nil {
config = append(config, configPair)
}
}
cmd, err := s.gitCmdFactory.New(ctx, request.Repository,
git.SubSubCmd{
Name: "remote",
Action: "show",
Args: []string{"inmemory"},
},
git.WithRefTxHook(request.Repository),
git.WithConfigEnv(config...),
)
if err != nil {
return "", err
}
scanner := bufio.NewScanner(cmd)
for scanner.Scan() {
line := strings.TrimSpace(scanner.Text())
if strings.HasPrefix(line, headPrefix) {
rootRef := strings.TrimPrefix(line, headPrefix)
if rootRef == "(unknown)" {
return "", status.Error(codes.NotFound, "no remote HEAD found")
}
return rootRef, 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) {
if in.GetRemoteUrl() == "" {
return nil, status.Error(codes.InvalidArgument, "missing remote URL")
}
if in.Repository == nil {
return nil, status.Error(codes.InvalidArgument, "missing repository")
}
ref, err := s.findRemoteRootRef(ctx, in)
if err != nil {
return nil, helper.ErrInternal(err)
}
return &gitalypb.FindRemoteRootRefResponse{Ref: ref}, nil
}
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