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// 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
}
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