1 files changed, 107 insertions, 0 deletions
diff --git a/modules/git/repo_base_gogit.go b/modules/git/repo_base_gogit.go
new file mode 100644
index 00000000..3ca5eb36
--- /dev/null
+++ b/modules/git/repo_base_gogit.go
@@ -0,0 +1,107 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build gogit
+
+package git
+
+import (
+	"context"
+	"errors"
+	"path/filepath"
+
+	gitealog "code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/go-git/go-billy/v5"
+	"github.com/go-git/go-billy/v5/osfs"
+	gogit "github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/cache"
+	"github.com/go-git/go-git/v5/storage/filesystem"
+)
+
+func init() {
+	isGogit = true
+}
+
+// Repository represents a Git repository.
+type Repository struct {
+	Path string
+
+	tagCache *ObjectCache
+
+	gogitRepo    *gogit.Repository
+	gogitStorage *filesystem.Storage
+	gpgSettings  *GPGSettings
+
+	Ctx             context.Context
+	LastCommitCache *LastCommitCache
+	objectFormat    ObjectFormat
+}
+
+// openRepositoryWithDefaultContext opens the repository at the given path with DefaultContext.
+func openRepositoryWithDefaultContext(repoPath string) (*Repository, error) {
+	return OpenRepository(DefaultContext, repoPath)
+}
+
+// OpenRepository opens the repository at the given path within the context.Context
+func OpenRepository(ctx context.Context, repoPath string) (*Repository, error) {
+	repoPath, err := filepath.Abs(repoPath)
+	if err != nil {
+		return nil, err
+	} else if !isDir(repoPath) {
+		return nil, errors.New("no such file or directory")
+	}
+
+	fs := osfs.New(repoPath)
+	_, err = fs.Stat(".git")
+	if err == nil {
+		fs, err = fs.Chroot(".git")
+		if err != nil {
+			return nil, err
+		}
+	}
+	// the "clone --shared" repo doesn't work well with go-git AlternativeFS, https://github.com/go-git/go-git/issues/1006
+	// so use "/" for AlternatesFS, I guess it is the same behavior as current nogogit (no limitation or check for the "objects/info/alternates" paths), trust the "clone" command executed by the server.
+	var altFs billy.Filesystem
+	if setting.IsWindows {
+		altFs = osfs.New(filepath.VolumeName(setting.RepoRootPath) + "\\") // TODO: does it really work for Windows? Need some time to check.
+	} else {
+		altFs = osfs.New("/")
+	}
+	storage := filesystem.NewStorageWithOptions(fs, cache.NewObjectLRUDefault(), filesystem.Options{KeepDescriptors: true, LargeObjectThreshold: setting.Git.LargeObjectThreshold, AlternatesFS: altFs})
+	gogitRepo, err := gogit.Open(storage, fs)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Repository{
+		Path:         repoPath,
+		gogitRepo:    gogitRepo,
+		gogitStorage: storage,
+		tagCache:     newObjectCache(),
+		Ctx:          ctx,
+		objectFormat: ParseGogitHash(plumbing.ZeroHash).Type(),
+	}, nil
+}
+
+// Close this repository, in particular close the underlying gogitStorage if this is not nil
+func (repo *Repository) Close() error {
+	if repo == nil || repo.gogitStorage == nil {
+		return nil
+	}
+	if err := repo.gogitStorage.Close(); err != nil {
+		gitealog.Error("Error closing storage: %v", err)
+	}
+	repo.gogitStorage = nil
+	repo.LastCommitCache = nil
+	repo.tagCache = nil
+	return nil
+}
+
+// GoGitRepo gets the go-git repo representation
+func (repo *Repository) GoGitRepo() *gogit.Repository {
+	return repo.gogitRepo
+}