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package repository
import (
"bytes"
"context"
"fmt"
"os"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/gitaly/transaction"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/internal/transaction/txinfo"
"gitlab.com/gitlab-org/gitaly/internal/transaction/voting"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func (s *server) CreateRepository(ctx context.Context, req *gitalypb.CreateRepositoryRequest) (*gitalypb.CreateRepositoryResponse, error) {
diskPath, err := s.locator.GetPath(req.GetRepository())
if err != nil {
return nil, helper.ErrInvalidArgumentf("locate repository: %w", err)
}
if err := os.MkdirAll(diskPath, 0770); err != nil {
return nil, helper.ErrInternalf("create directories: %w", err)
}
stderr := &bytes.Buffer{}
cmd, err := s.gitCmdFactory.NewWithoutRepo(ctx,
git.SubCmd{
Name: "init",
Flags: []git.Option{
git.Flag{Name: "--bare"},
git.Flag{Name: "--quiet"},
},
Args: []string{diskPath},
},
git.WithStderr(stderr),
)
if err != nil {
return nil, helper.ErrInternalf("create git init: %w", err)
}
if err := cmd.Wait(); err != nil {
return nil, helper.ErrInternalf("git init stderr: %q, err: %w", stderr, err)
}
// Given that git-init(1) does not create any refs, we never cast a vote on it. We thus do
// manual voting here by hashing all references of the repository. While this would in the
// general case hash nothing given that no refs exist yet, due to the idempotency of this
// RPC it may be that we already do have some preexisting refs (e.g. CreateRepository is
// called for a repo which already exists and has refs). In that case, voting ensures that
// all replicas have the same set of preexisting refs.
if err := transaction.RunOnContext(ctx, func(tx txinfo.Transaction, server txinfo.PraefectServer) error {
hash := voting.NewVoteHash()
cmd, err := s.gitCmdFactory.New(ctx, req.GetRepository(), git.SubCmd{
Name: "for-each-ref",
}, git.WithStdout(hash))
if err != nil {
return fmt.Errorf("for-each-ref: %v", err)
}
if err := cmd.Wait(); err != nil {
return fmt.Errorf("waiting for for-each-ref: %v", err)
}
vote, err := hash.Vote()
if err != nil {
return err
}
if err := s.txManager.Vote(ctx, tx, server, vote); err != nil {
return fmt.Errorf("casting vote: %w", err)
}
return nil
}); err != nil {
return nil, status.Errorf(codes.Aborted, "vote failed after initializing repo: %v", err)
}
return &gitalypb.CreateRepositoryResponse{}, nil
}
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