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package commit
import (
"fmt"
"io"
"strings"
"gitlab.com/gitlab-org/gitaly/v15/internal/git"
"gitlab.com/gitlab-org/gitaly/v15/internal/git/catfile"
"gitlab.com/gitlab-org/gitaly/v15/internal/helper"
"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
"gitlab.com/gitlab-org/gitaly/v15/streamio"
)
func sendTreeEntry(
stream gitalypb.CommitService_TreeEntryServer,
objectReader catfile.ObjectReader,
objectInfoReader catfile.ObjectInfoReader,
revision, path string,
limit, maxSize int64,
) error {
ctx := stream.Context()
treeEntry, err := catfile.NewTreeEntryFinder(objectReader, objectInfoReader).FindByRevisionAndPath(ctx, revision, path)
if err != nil {
return err
}
if treeEntry == nil || len(treeEntry.Oid) == 0 {
return helper.ErrNotFoundf("not found: %s", path)
}
if treeEntry.Type == gitalypb.TreeEntry_COMMIT {
response := &gitalypb.TreeEntryResponse{
Type: gitalypb.TreeEntryResponse_COMMIT,
Mode: treeEntry.Mode,
Oid: treeEntry.Oid,
}
if err := stream.Send(response); err != nil {
return helper.ErrUnavailablef("TreeEntry: send: %v", err)
}
return nil
}
if treeEntry.Type == gitalypb.TreeEntry_TREE {
treeInfo, err := objectInfoReader.Info(ctx, git.Revision(treeEntry.Oid))
if err != nil {
return err
}
response := &gitalypb.TreeEntryResponse{
Type: gitalypb.TreeEntryResponse_TREE,
Oid: treeEntry.Oid,
Size: treeInfo.Size,
Mode: treeEntry.Mode,
}
return helper.ErrUnavailable(stream.Send(response))
}
objectInfo, err := objectInfoReader.Info(ctx, git.Revision(treeEntry.Oid))
if err != nil {
return helper.ErrInternalf("TreeEntry: %v", err)
}
if strings.ToLower(treeEntry.Type.String()) != objectInfo.Type {
return helper.ErrInternalf(
"TreeEntry: mismatched object type: tree-oid=%s object-oid=%s entry-type=%s object-type=%s",
treeEntry.Oid, objectInfo.Oid, treeEntry.Type.String(), objectInfo.Type,
)
}
dataLength := objectInfo.Size
if maxSize > 0 && dataLength > maxSize {
return helper.ErrFailedPreconditionf(
"TreeEntry: object size (%d) is bigger than the maximum allowed size (%d)",
dataLength, maxSize,
)
}
if limit > 0 && dataLength > limit {
dataLength = limit
}
response := &gitalypb.TreeEntryResponse{
Type: gitalypb.TreeEntryResponse_BLOB,
Oid: objectInfo.Oid.String(),
Size: objectInfo.Size,
Mode: treeEntry.Mode,
}
if dataLength == 0 {
return helper.ErrUnavailable(stream.Send(response))
}
blobObj, err := objectReader.Object(ctx, git.Revision(objectInfo.Oid))
if err != nil {
return err
}
if blobObj.Type != "blob" {
return fmt.Errorf("blob has unexpected type %q", blobObj.Type)
}
sw := streamio.NewWriter(func(p []byte) error {
response.Data = p
if err := stream.Send(response); err != nil {
return helper.ErrUnavailablef("TreeEntry: send: %v", err)
}
// Use a new response so we don't send other fields (Size, ...) over and over
response = &gitalypb.TreeEntryResponse{}
return nil
})
_, err = io.CopyN(sw, blobObj, dataLength)
return err
}
func (s *server) TreeEntry(in *gitalypb.TreeEntryRequest, stream gitalypb.CommitService_TreeEntryServer) error {
if err := validateRequest(in); err != nil {
return helper.ErrInvalidArgumentf("TreeEntry: %v", err)
}
repo := s.localrepo(in.GetRepository())
requestPath := string(in.GetPath())
// filepath.Dir("api/docs") => "api" Correct!
// filepath.Dir("api/docs/") => "api/docs" WRONG!
if len(requestPath) > 1 {
requestPath = strings.TrimRight(requestPath, "/")
}
objectReader, cancel, err := s.catfileCache.ObjectReader(stream.Context(), repo)
if err != nil {
return err
}
defer cancel()
objectInfoReader, cancel, err := s.catfileCache.ObjectInfoReader(stream.Context(), repo)
if err != nil {
return err
}
defer cancel()
return sendTreeEntry(stream, objectReader, objectInfoReader, string(in.GetRevision()), requestPath, in.GetLimit(), in.GetMaxSize())
}
func validateRequest(in *gitalypb.TreeEntryRequest) error {
if err := git.ValidateRevision(in.Revision); err != nil {
return err
}
if len(in.GetPath()) == 0 {
return fmt.Errorf("empty Path")
}
if in.GetLimit() < 0 {
return fmt.Errorf("negative Limit")
}
if in.GetMaxSize() < 0 {
return fmt.Errorf("negative MaxSize")
}
return nil
}
|
