Adding upstream version 9.0.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 248 insertions, 0 deletions

diff --git a/services/repository/fork.go b/services/repository/fork.go
new file mode 100644
index 0000000..0378f7b
--- /dev/null
+++ b/services/repository/fork.go
@@ -0,0 +1,248 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repository
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/models/db"
+	git_model "code.gitea.io/gitea/models/git"
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/gitrepo"
+	"code.gitea.io/gitea/modules/log"
+	repo_module "code.gitea.io/gitea/modules/repository"
+	"code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/util"
+	notify_service "code.gitea.io/gitea/services/notify"
+)
+
+// ErrForkAlreadyExist represents a "ForkAlreadyExist" kind of error.
+type ErrForkAlreadyExist struct {
+	Uname    string
+	RepoName string
+	ForkName string
+}
+
+// IsErrForkAlreadyExist checks if an error is an ErrForkAlreadyExist.
+func IsErrForkAlreadyExist(err error) bool {
+	_, ok := err.(ErrForkAlreadyExist)
+	return ok
+}
+
+func (err ErrForkAlreadyExist) Error() string {
+	return fmt.Sprintf("repository is already forked by user [uname: %s, repo path: %s, fork path: %s]", err.Uname, err.RepoName, err.ForkName)
+}
+
+func (err ErrForkAlreadyExist) Unwrap() error {
+	return util.ErrAlreadyExist
+}
+
+// ForkRepoOptions contains the fork repository options
+type ForkRepoOptions struct {
+	BaseRepo     *repo_model.Repository
+	Name         string
+	Description  string
+	SingleBranch string
+}
+
+// ForkRepositoryIfNotExists creates a fork of a repository if it does not already exists and fails otherwise
+func ForkRepositoryIfNotExists(ctx context.Context, doer, owner *user_model.User, opts ForkRepoOptions) (*repo_model.Repository, error) {
+	// Fork is prohibited, if user has reached maximum limit of repositories
+	if !doer.IsAdmin && !owner.CanForkRepo() {
+		return nil, repo_model.ErrReachLimitOfRepo{
+			Limit: owner.MaxRepoCreation,
+		}
+	}
+
+	forkedRepo, err := repo_model.GetUserFork(ctx, opts.BaseRepo.ID, owner.ID)
+	if err != nil {
+		return nil, err
+	}
+	if forkedRepo != nil {
+		return nil, ErrForkAlreadyExist{
+			Uname:    owner.Name,
+			RepoName: opts.BaseRepo.FullName(),
+			ForkName: forkedRepo.FullName(),
+		}
+	}
+
+	defaultBranch := opts.BaseRepo.DefaultBranch
+	if opts.SingleBranch != "" {
+		defaultBranch = opts.SingleBranch
+	}
+	repo := &repo_model.Repository{
+		OwnerID:          owner.ID,
+		Owner:            owner,
+		OwnerName:        owner.Name,
+		Name:             opts.Name,
+		LowerName:        strings.ToLower(opts.Name),
+		Description:      opts.Description,
+		DefaultBranch:    defaultBranch,
+		IsPrivate:        opts.BaseRepo.IsPrivate || opts.BaseRepo.Owner.Visibility == structs.VisibleTypePrivate,
+		IsEmpty:          opts.BaseRepo.IsEmpty,
+		IsFork:           true,
+		ForkID:           opts.BaseRepo.ID,
+		ObjectFormatName: opts.BaseRepo.ObjectFormatName,
+	}
+
+	oldRepoPath := opts.BaseRepo.RepoPath()
+
+	needsRollback := false
+	rollbackFn := func() {
+		if !needsRollback {
+			return
+		}
+
+		repoPath := repo_model.RepoPath(owner.Name, repo.Name)
+
+		if exists, _ := util.IsExist(repoPath); !exists {
+			return
+		}
+
+		// As the transaction will be failed and hence database changes will be destroyed we only need
+		// to delete the related repository on the filesystem
+		if errDelete := util.RemoveAll(repoPath); errDelete != nil {
+			log.Error("Failed to remove fork repo")
+		}
+	}
+
+	needsRollbackInPanic := true
+	defer func() {
+		panicErr := recover()
+		if panicErr == nil {
+			return
+		}
+
+		if needsRollbackInPanic {
+			rollbackFn()
+		}
+		panic(panicErr)
+	}()
+
+	err = db.WithTx(ctx, func(txCtx context.Context) error {
+		if err = repo_module.CreateRepositoryByExample(txCtx, doer, owner, repo, false, true); err != nil {
+			return err
+		}
+
+		if err = repo_model.IncrementRepoForkNum(txCtx, opts.BaseRepo.ID); err != nil {
+			return err
+		}
+
+		// copy lfs files failure should not be ignored
+		if err = git_model.CopyLFS(txCtx, repo, opts.BaseRepo); err != nil {
+			return err
+		}
+
+		needsRollback = true
+
+		cloneCmd := git.NewCommand(txCtx, "clone", "--bare")
+		if opts.SingleBranch != "" {
+			cloneCmd.AddArguments("--single-branch", "--branch").AddDynamicArguments(opts.SingleBranch)
+		}
+		repoPath := repo_model.RepoPath(owner.Name, repo.Name)
+		if stdout, _, err := cloneCmd.AddDynamicArguments(oldRepoPath, repoPath).
+			SetDescription(fmt.Sprintf("ForkRepositoryIfNotExists(git clone): %s to %s", opts.BaseRepo.FullName(), repo.FullName())).
+			RunStdBytes(&git.RunOpts{Timeout: 10 * time.Minute}); err != nil {
+			log.Error("Fork Repository (git clone) Failed for %v (from %v):\nStdout: %s\nError: %v", repo, opts.BaseRepo, stdout, err)
+			return fmt.Errorf("git clone: %w", err)
+		}
+
+		if err := repo_module.CheckDaemonExportOK(txCtx, repo); err != nil {
+			return fmt.Errorf("checkDaemonExportOK: %w", err)
+		}
+
+		if stdout, _, err := git.NewCommand(txCtx, "update-server-info").
+			SetDescription(fmt.Sprintf("ForkRepositoryIfNotExists(git update-server-info): %s", repo.FullName())).
+			RunStdString(&git.RunOpts{Dir: repoPath}); err != nil {
+			log.Error("Fork Repository (git update-server-info) failed for %v:\nStdout: %s\nError: %v", repo, stdout, err)
+			return fmt.Errorf("git update-server-info: %w", err)
+		}
+
+		if err = repo_module.CreateDelegateHooks(repoPath); err != nil {
+			return fmt.Errorf("createDelegateHooks: %w", err)
+		}
+
+		gitRepo, err := gitrepo.OpenRepository(txCtx, repo)
+		if err != nil {
+			return fmt.Errorf("OpenRepository: %w", err)
+		}
+		defer gitRepo.Close()
+
+		_, err = repo_module.SyncRepoBranchesWithRepo(txCtx, repo, gitRepo, doer.ID)
+		return err
+	})
+	needsRollbackInPanic = false
+	if err != nil {
+		rollbackFn()
+		return nil, err
+	}
+
+	return repo, nil
+}
+
+// ForkRepositoryAndUpdates forks a repository. On success it updates metadata (size, stats, etc.) and send a notification.
+func ForkRepositoryAndUpdates(ctx context.Context, doer, owner *user_model.User, opts ForkRepoOptions) (*repo_model.Repository, error) {
+	repo, err := ForkRepositoryIfNotExists(ctx, doer, owner, opts)
+	if err != nil {
+		return nil, err
+	}
+
+	// even if below operations failed, it could be ignored. And they will be retried
+	if err := repo_module.UpdateRepoSize(ctx, repo); err != nil {
+		log.Error("Failed to update size for repository: %v", err)
+	}
+	if err := repo_model.CopyLanguageStat(ctx, opts.BaseRepo, repo); err != nil {
+		log.Error("Copy language stat from oldRepo failed: %v", err)
+	}
+
+	gitRepo, err := gitrepo.OpenRepository(ctx, repo)
+	if err != nil {
+		log.Error("Open created git repository failed: %v", err)
+	} else {
+		defer gitRepo.Close()
+		if err := repo_module.SyncReleasesWithTags(ctx, repo, gitRepo); err != nil {
+			log.Error("Sync releases from git tags failed: %v", err)
+		}
+	}
+
+	notify_service.ForkRepository(ctx, doer, opts.BaseRepo, repo)
+
+	return repo, nil
+}
+
+// ConvertForkToNormalRepository convert the provided repo from a forked repo to normal repo
+func ConvertForkToNormalRepository(ctx context.Context, repo *repo_model.Repository) error {
+	err := db.WithTx(ctx, func(ctx context.Context) error {
+		repo, err := repo_model.GetRepositoryByID(ctx, repo.ID)
+		if err != nil {
+			return err
+		}
+
+		if !repo.IsFork {
+			return nil
+		}
+
+		if err := repo_model.DecrementRepoForkNum(ctx, repo.ForkID); err != nil {
+			log.Error("Unable to decrement repo fork num for old root repo %d of repository %-v whilst converting from fork. Error: %v", repo.ForkID, repo, err)
+			return err
+		}
+
+		repo.IsFork = false
+		repo.ForkID = 0
+
+		if err := repo_module.UpdateRepository(ctx, repo, false); err != nil {
+			log.Error("Unable to update repository %-v whilst converting from fork. Error: %v", repo, err)
+			return err
+		}
+
+		return nil
+	})
+
+	return err
+}