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|
package repository
import (
"context"
"errors"
"fmt"
"io"
"os"
"path/filepath"
"gitlab.com/gitlab-org/gitaly/v16/internal/git"
"gitlab.com/gitlab-org/gitaly/v16/internal/git/catfile"
"gitlab.com/gitlab-org/gitaly/v16/internal/git/localrepo"
"gitlab.com/gitlab-org/gitaly/v16/internal/gitaly/transaction"
"gitlab.com/gitlab-org/gitaly/v16/internal/helper/perm"
"gitlab.com/gitlab-org/gitaly/v16/internal/safe"
"gitlab.com/gitlab-org/gitaly/v16/internal/structerr"
"gitlab.com/gitlab-org/gitaly/v16/internal/transaction/txinfo"
"gitlab.com/gitlab-org/gitaly/v16/internal/transaction/voting"
"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
)
const attributesFileMode os.FileMode = perm.SharedFile
func (s *server) applyGitattributes(ctx context.Context, repo *localrepo.Repo, objectReader catfile.ObjectContentReader, repoPath string, revision []byte) (returnedErr error) {
infoPath := filepath.Join(repoPath, "info")
attributesPath := filepath.Join(infoPath, "attributes")
_, err := repo.ResolveRevision(ctx, git.Revision(revision)+"^{commit}")
if err != nil {
if errors.Is(err, git.ErrReferenceNotFound) {
return structerr.NewInvalidArgument("revision does not exist")
}
return err
}
blobObj, err := objectReader.Object(ctx, git.Revision(fmt.Sprintf("%s:.gitattributes", revision)))
if err != nil && !errors.As(err, &catfile.NotFoundError{}) {
return err
}
// Create /info folder if it doesn't exist
if err := os.MkdirAll(infoPath, perm.SharedDir); err != nil {
return err
}
if errors.As(err, &catfile.NotFoundError{}) || blobObj.Type != "blob" {
locker, err := safe.NewLockingFileWriter(attributesPath, safe.LockingFileWriterConfig{
FileWriterConfig: safe.FileWriterConfig{FileMode: attributesFileMode},
})
if err != nil {
return fmt.Errorf("creating gitattributes lock: %w", err)
}
defer func() {
if err := locker.Close(); err != nil {
s.logger.WithError(err).ErrorContext(ctx, "unlocking gitattributes")
}
}()
if err := locker.Lock(); err != nil {
return fmt.Errorf("locking gitattributes: %w", err)
}
// We use the zero OID as placeholder to vote on removal of the
// gitattributes file.
if err := s.vote(ctx, git.ObjectHashSHA1.ZeroOID, voting.Prepared); err != nil {
return fmt.Errorf("preimage vote: %w", err)
}
if err := os.Remove(attributesPath); err != nil && !os.IsNotExist(err) {
return err
}
if err := s.vote(ctx, git.ObjectHashSHA1.ZeroOID, voting.Committed); err != nil {
return fmt.Errorf("postimage vote: %w", err)
}
return nil
}
writer, err := safe.NewLockingFileWriter(attributesPath, safe.LockingFileWriterConfig{
FileWriterConfig: safe.FileWriterConfig{FileMode: attributesFileMode},
})
if err != nil {
return fmt.Errorf("creating gitattributes writer: %w", err)
}
defer func() {
if err := writer.Close(); err != nil && returnedErr == nil {
if !errors.Is(err, safe.ErrAlreadyDone) {
returnedErr = err
}
}
}()
if _, err := io.Copy(writer, blobObj); err != nil {
return err
}
if err := transaction.CommitLockedFile(ctx, s.txManager, writer); err != nil {
return fmt.Errorf("committing gitattributes: %w", err)
}
return nil
}
func (s *server) vote(ctx context.Context, oid git.ObjectID, phase voting.Phase) error {
tx, err := txinfo.TransactionFromContext(ctx)
if errors.Is(err, txinfo.ErrTransactionNotFound) {
return nil
}
hash, err := oid.Bytes()
if err != nil {
return fmt.Errorf("vote with invalid object ID: %w", err)
}
vote, err := voting.VoteFromHash(hash)
if err != nil {
return fmt.Errorf("cannot convert OID to vote: %w", err)
}
if err := s.txManager.Vote(ctx, tx, vote, phase); err != nil {
return fmt.Errorf("vote failed: %w", err)
}
return nil
}
func (s *server) ApplyGitattributes(ctx context.Context, in *gitalypb.ApplyGitattributesRequest) (*gitalypb.ApplyGitattributesResponse, error) {
repository := in.GetRepository()
if err := s.locator.ValidateRepository(repository); err != nil {
return nil, structerr.NewInvalidArgument("%w", err)
}
repo := s.localrepo(repository)
repoPath, err := s.locator.GetRepoPath(repo)
if err != nil {
return nil, err
}
if err := git.ValidateRevision(in.GetRevision()); err != nil {
return nil, structerr.NewInvalidArgument("revision: %w", err)
}
objectReader, cancel, err := s.catfileCache.ObjectReader(ctx, repo)
if err != nil {
return nil, err
}
defer cancel()
if err := s.applyGitattributes(ctx, repo, objectReader, repoPath, in.GetRevision()); err != nil {
return nil, err
}
return &gitalypb.ApplyGitattributesResponse{}, nil
}
|
