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package commit
import (
"fmt"
"io"
"sort"
"gitlab.com/gitlab-org/gitaly/internal/command"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/git/catfile"
"gitlab.com/gitlab-org/gitaly/internal/git/log"
"gitlab.com/gitlab-org/gitaly/internal/git/lstree"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
)
const (
// InvalidUTF8PathPlaceholder is a placeholder we return in the Path field since
// returning non utf8 data will result in a marshalling error
// Once we deprecate the Path field, we can remove this
InvalidUTF8PathPlaceholder = "ENCODING ERROR gitaly#1547"
)
var (
maxNumStatBatchSize = 10
)
func (s *server) ListLastCommitsForTree(in *gitalypb.ListLastCommitsForTreeRequest, stream gitalypb.CommitService_ListLastCommitsForTreeServer) error {
if err := validateListLastCommitsForTreeRequest(in); err != nil {
return helper.ErrInvalidArgument(err)
}
if err := s.listLastCommitsForTree(in, stream); err != nil {
return helper.ErrInternal(err)
}
return nil
}
func (s *server) listLastCommitsForTree(in *gitalypb.ListLastCommitsForTreeRequest, stream gitalypb.CommitService_ListLastCommitsForTreeServer) error {
cmd, parser, err := s.newLSTreeParser(in, stream)
if err != nil {
return err
}
ctx := stream.Context()
repo := in.GetRepository()
c, err := catfile.New(ctx, s.gitCmdFactory, repo)
if err != nil {
return err
}
batch := make([]*gitalypb.ListLastCommitsForTreeResponse_CommitForTree, 0, maxNumStatBatchSize)
entries, err := getLSTreeEntries(parser)
if err != nil {
return err
}
offset := int(in.GetOffset())
if offset >= len(entries) {
offset = 0
entries = lstree.Entries{}
}
limit := offset + int(in.GetLimit())
if limit > len(entries) {
limit = len(entries)
}
for _, entry := range entries[offset:limit] {
commit, err := log.LastCommitForPath(ctx, s.gitCmdFactory, c, repo, git.Revision(in.GetRevision()), entry.Path, in.GetGlobalOptions())
if err != nil {
return err
}
commitForTree := &gitalypb.ListLastCommitsForTreeResponse_CommitForTree{
PathBytes: []byte(entry.Path),
Commit: commit,
}
batch = append(batch, commitForTree)
if len(batch) == maxNumStatBatchSize {
if err := sendCommitsForTree(batch, stream); err != nil {
return err
}
batch = batch[0:0]
}
}
if err := cmd.Wait(); err != nil {
return err
}
return sendCommitsForTree(batch, stream)
}
func getLSTreeEntries(parser *lstree.Parser) (lstree.Entries, error) {
entries := lstree.Entries{}
for {
entry, err := parser.NextEntry()
if err != nil {
if err == io.EOF {
break
}
return nil, err
}
entries = append(entries, *entry)
}
sort.Stable(entries)
return entries, nil
}
func (s *server) newLSTreeParser(in *gitalypb.ListLastCommitsForTreeRequest, stream gitalypb.CommitService_ListLastCommitsForTreeServer) (*command.Command, *lstree.Parser, error) {
path := string(in.GetPath())
if path == "" || path == "/" {
path = "."
}
opts := git.ConvertGlobalOptions(in.GetGlobalOptions())
cmd, err := s.gitCmdFactory.New(stream.Context(), in.GetRepository(), git.SubCmd{
Name: "ls-tree",
Flags: []git.Option{git.Flag{Name: "-z"}, git.Flag{Name: "--full-name"}},
Args: []string{in.GetRevision(), path},
}, opts...)
if err != nil {
return nil, nil, err
}
return cmd, lstree.NewParser(cmd), nil
}
func sendCommitsForTree(batch []*gitalypb.ListLastCommitsForTreeResponse_CommitForTree, stream gitalypb.CommitService_ListLastCommitsForTreeServer) error {
if len(batch) == 0 {
return nil
}
if err := stream.Send(&gitalypb.ListLastCommitsForTreeResponse{Commits: batch}); err != nil {
return err
}
return nil
}
func validateListLastCommitsForTreeRequest(in *gitalypb.ListLastCommitsForTreeRequest) error {
if err := git.ValidateRevision([]byte(in.Revision)); err != nil {
return err
}
if in.GetOffset() < 0 {
return fmt.Errorf("offset negative")
}
if in.GetLimit() < 0 {
return fmt.Errorf("limit negative")
}
return nil
}
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