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package repository
import (
"bufio"
"errors"
"io"
"os"
"strings"
"gitlab.com/gitlab-org/gitaly/v16/internal/git"
"gitlab.com/gitlab-org/gitaly/v16/internal/structerr"
"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
"gitlab.com/gitlab-org/gitaly/v16/streamio"
)
func (s *server) GetInfoAttributes(in *gitalypb.GetInfoAttributesRequest, stream gitalypb.RepositoryService_GetInfoAttributesServer) (returnedErr error) {
repository := in.GetRepository()
if err := s.locator.ValidateRepository(repository); err != nil {
return structerr.NewInvalidArgument("%w", err)
}
repoPath, err := s.locator.GetRepoPath(repository)
if err != nil {
return err
}
// In git 2.43.0+, gitattributes supports reading from HEAD:.gitattributes,
// so info/attributes is no longer needed. To make sure info/attributes file is cleaned up,
// we delete it if it exists when reading from HEAD:.gitattributes is called.
// This logic can be removed when ApplyGitattributes and GetInfoAttributes PRC are totally removed from
// the code base.
deletionErr := deleteInfoAttributesFile(repoPath)
if !os.IsNotExist(deletionErr) {
s.logger.WithError(deletionErr).Error("failed to delete info/gitattributes file at " + repoPath)
}
repo := s.localrepo(in.GetRepository())
ctx := stream.Context()
var stderr strings.Builder
// Call cat-file -p HEAD:.gitattributes instead of cat info/attributes
catFileCmd, err := repo.Exec(ctx, git.Command{
Name: "cat-file",
Flags: []git.Option{
git.Flag{Name: "-p"},
},
Args: []string{"HEAD:.gitattributes"},
},
git.WithSetupStdout(),
git.WithStderr(&stderr),
)
if err != nil {
return structerr.NewInternal("failure to read HEAD:.gitattributes: %w", err)
}
defer func() {
if err := catFileCmd.Wait(); err != nil {
s.logger.Error("git cat-file command error: " + stderr.String())
if returnedErr != nil {
returnedErr = structerr.NewInternal("failure to read HEAD:.gitattributes: %w", err)
}
}
}()
buf := bufio.NewReader(catFileCmd)
_, err = buf.Peek(1)
if errors.Is(err, io.EOF) {
return stream.Send(&gitalypb.GetInfoAttributesResponse{})
}
sw := streamio.NewWriter(func(p []byte) error {
return stream.Send(&gitalypb.GetInfoAttributesResponse{
Attributes: p,
})
})
_, err = io.Copy(sw, buf)
return err
}
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