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package repository
import (
"context"
"errors"
"fmt"
"os"
"github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/ctxlogrus"
"github.com/sirupsen/logrus"
"gitlab.com/gitlab-org/gitaly/internal/command"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/git/objectpool"
"gitlab.com/gitlab-org/gitaly/internal/gitaly/config"
"gitlab.com/gitlab-org/gitaly/internal/gitalyssh"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
type commandArgs struct {
ctx context.Context
req *gitalypb.CreateForkRequest
sourceRepository *gitalypb.Repository
targetRepository *gitalypb.Repository
targetRepositoryFullPath string
objectPool *objectpool.ObjectPool
sourceObjectPoolPath string
}
func (s *server) CreateFork(ctx context.Context, req *gitalypb.CreateForkRequest) (*gitalypb.CreateForkResponse, error) {
targetRepository := req.Repository
sourceRepository := req.SourceRepository
if err := validateCreateForkRequest(req); err != nil {
return nil, helper.ErrInvalidArgument(err)
}
targetRepositoryFullPath, err := s.cleanTargetRepository(targetRepository)
if err != nil {
return nil, err
}
ctxlogrus.AddFields(ctx, logrus.Fields{
"source_storage": sourceRepository.GetStorageName(),
"source_path": sourceRepository.GetRelativePath(),
"target_storage": targetRepository.GetStorageName(),
"target_path": targetRepository.GetRelativePath(),
})
objectPool, sourceObjectPoolPath, err := s.getObjectPool(req)
if err != nil {
return nil, err
}
cmd, err := s.cloneCommand(commandArgs{
ctx: ctx,
req: req,
sourceRepository: sourceRepository,
targetRepository: targetRepository,
targetRepositoryFullPath: targetRepositoryFullPath,
objectPool: objectPool,
sourceObjectPoolPath: sourceObjectPoolPath})
if err != nil {
return nil, status.Errorf(codes.Internal, "CreateFork: clone cmd start: %v", err)
}
if err := cmd.Wait(); err != nil {
return nil, status.Errorf(codes.Internal, "CreateFork: clone cmd wait: %v", err)
}
if err := s.removeOriginInRepo(ctx, targetRepository); err != nil {
return nil, status.Errorf(codes.Internal, "CreateFork: %v", err)
}
// CreateRepository is harmless on existing repositories with the side effect that it creates the hook symlink.
if _, err := s.CreateRepository(ctx, &gitalypb.CreateRepositoryRequest{Repository: targetRepository}); err != nil {
return nil, status.Errorf(codes.Internal, "CreateFork: create hooks failed: %v", err)
}
// The `git clone` creates an alternates file, but it uses an absolute path. We recreate
// the file with a relative path.
if objectPool != nil {
if err := objectPool.ForceLink(ctx, targetRepository); err != nil {
return nil, status.Errorf(codes.Internal, "CreateFork: error relinking object pool from target: %v", err)
}
}
return &gitalypb.CreateForkResponse{}, nil
}
func validateCreateForkRequest(req *gitalypb.CreateForkRequest) error {
targetRepository := req.Repository
sourceRepository := req.SourceRepository
if sourceRepository == nil {
return errors.New("CreateFork: empty SourceRepository")
}
if targetRepository == nil {
return errors.New("CreateFork: empty Repository")
}
poolRepository := req.GetPool().GetRepository()
if poolRepository == nil {
return nil
}
if targetRepository.GetStorageName() != poolRepository.GetStorageName() {
return errors.New("target repository is on a different storage than the object pool")
}
return nil
}
func (s *server) cleanTargetRepository(targetRepository *gitalypb.Repository) (string, error) {
targetRepositoryFullPath, err := s.locator.GetPath(targetRepository)
if err != nil {
return "", err
}
if info, err := os.Stat(targetRepositoryFullPath); err != nil {
if !os.IsNotExist(err) {
return "", status.Errorf(codes.Internal, "CreateFork: check destination path: %v", err)
}
// directory does not exist, proceed
} else {
if !info.IsDir() {
return "", status.Errorf(codes.InvalidArgument, "CreateFork: destination path exists")
}
if err := os.Remove(targetRepositoryFullPath); err != nil {
return "", status.Errorf(codes.InvalidArgument, "CreateFork: destination directory is not empty")
}
}
if err := os.MkdirAll(targetRepositoryFullPath, 0770); err != nil {
return "", status.Errorf(codes.Internal, "CreateFork: create dest dir: %v", err)
}
return targetRepositoryFullPath, nil
}
func (s *server) getObjectPool(req *gitalypb.CreateForkRequest) (*objectpool.ObjectPool, string, error) {
repository := req.GetPool().GetRepository()
if repository == nil {
return nil, "", nil
}
objectPool, err := objectpool.FromProto(s.cfg, config.NewLocator(s.cfg), req.GetPool())
if err != nil {
return nil, "", status.Errorf(codes.InvalidArgument, "CreateFork: get object pool from request: %v", err)
}
sourceObjectPoolPath, err := s.locator.GetPath(repository)
if err != nil {
return nil, "", status.Errorf(codes.InvalidArgument, "CreateFork: unable to find source object pool: %v", err)
}
return objectPool, sourceObjectPoolPath, nil
}
func (s *server) cloneCommand(a commandArgs) (*command.Command, error) {
flags := []git.Option{
git.Flag{Name: "--bare"},
}
var args []string
var postSepArgs []string
if a.objectPool != nil {
flags = append(flags, git.ValueFlag{Name: "--reference", Value: a.sourceObjectPoolPath})
ctxlogrus.AddFields(a.ctx, logrus.Fields{"object_pool_path": a.sourceObjectPoolPath})
}
if a.req.GetAllowLocal() && a.sourceRepository.GetStorageName() == a.targetRepository.GetStorageName() {
sourceRepositoryFullPath, err := s.locator.GetPath(a.sourceRepository)
if err != nil {
return nil, err
}
if _, err := os.Stat(sourceRepositoryFullPath); err != nil {
if !os.IsNotExist(err) {
return nil, status.Errorf(codes.Internal, "CreateFork: check source path: %v", err)
}
}
flags = append(flags, git.Flag{Name: "--local"}, git.Flag{Name: "--no-hardlinks"})
args = []string{sourceRepositoryFullPath}
postSepArgs = []string{a.targetRepositoryFullPath}
} else {
flags = append(flags, git.Flag{Name: "--no-local"})
postSepArgs = []string{
fmt.Sprintf("%s:%s", gitalyssh.GitalyInternalURL, a.sourceRepository.RelativePath),
a.targetRepositoryFullPath,
}
}
env, err := gitalyssh.UploadPackEnv(a.ctx, &gitalypb.SSHUploadPackRequest{Repository: a.sourceRepository})
if err != nil {
return nil, err
}
cmd, err := git.SafeBareCmd(a.ctx, git.CmdStream{}, env, nil,
git.SubCmd{
Name: "clone",
Flags: flags,
Args: args,
PostSepArgs: postSepArgs,
},
git.WithRefTxHook(a.ctx, a.req.Repository, s.cfg),
)
return cmd, err
}
|
