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// Copyright 2019 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package repository
import (
"context"
"fmt"
"strings"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/util"
)
// ForkRepository forks a repository
func ForkRepository(doer, owner *models.User, opts models.ForkRepoOptions) (_ *models.Repository, err error) {
forkedRepo, err := opts.BaseRepo.GetUserFork(owner.ID)
if err != nil {
return nil, err
}
if forkedRepo != nil {
return nil, models.ErrForkAlreadyExist{
Uname: owner.Name,
RepoName: opts.BaseRepo.FullName(),
ForkName: forkedRepo.FullName(),
}
}
repo := &models.Repository{
OwnerID: owner.ID,
Owner: owner,
OwnerName: owner.Name,
Name: opts.Name,
LowerName: strings.ToLower(opts.Name),
Description: opts.Description,
DefaultBranch: opts.BaseRepo.DefaultBranch,
IsPrivate: opts.BaseRepo.IsPrivate || opts.BaseRepo.Owner.Visibility == structs.VisibleTypePrivate,
IsEmpty: opts.BaseRepo.IsEmpty,
IsFork: true,
ForkID: opts.BaseRepo.ID,
}
oldRepoPath := opts.BaseRepo.RepoPath()
needsRollback := false
rollbackFn := func() {
if !needsRollback {
return
}
repoPath := models.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(func(ctx context.Context) error {
if err = models.CreateRepository(ctx, doer, owner, repo, false); err != nil {
return err
}
if err = models.IncrementRepoForkNum(ctx, opts.BaseRepo.ID); err != nil {
return err
}
// copy lfs files failure should not be ignored
if err = models.CopyLFS(ctx, repo, opts.BaseRepo); err != nil {
return err
}
needsRollback = true
repoPath := models.RepoPath(owner.Name, repo.Name)
if stdout, err := git.NewCommandContext(ctx,
"clone", "--bare", oldRepoPath, repoPath).
SetDescription(fmt.Sprintf("ForkRepository(git clone): %s to %s", opts.BaseRepo.FullName(), repo.FullName())).
RunInDirTimeout(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: %v", err)
}
if err := repo.CheckDaemonExportOK(ctx); err != nil {
return fmt.Errorf("checkDaemonExportOK: %v", err)
}
if stdout, err := git.NewCommandContext(ctx, "update-server-info").
SetDescription(fmt.Sprintf("ForkRepository(git update-server-info): %s", repo.FullName())).
RunInDir(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: %v", err)
}
if err = createDelegateHooks(repoPath); err != nil {
return fmt.Errorf("createDelegateHooks: %v", err)
}
return nil
})
needsRollbackInPanic = false
if err != nil {
rollbackFn()
return nil, err
}
// even if below operations failed, it could be ignored. And they will be retried
ctx := db.DefaultContext
if err := repo.UpdateSize(ctx); err != nil {
log.Error("Failed to update size for repository: %v", err)
}
if err := models.CopyLanguageStat(opts.BaseRepo, repo); err != nil {
log.Error("Copy language stat from oldRepo failed")
}
return repo, nil
}
// ConvertForkToNormalRepository convert the provided repo from a forked repo to normal repo
func ConvertForkToNormalRepository(repo *models.Repository) error {
err := db.WithTx(func(ctx context.Context) error {
repo, err := models.GetRepositoryByIDCtx(ctx, repo.ID)
if err != nil {
return err
}
if !repo.IsFork {
return nil
}
if err := models.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 := models.UpdateRepositoryCtx(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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