Golang git.OpenRepository函数代码示例

// UpdatePatch generates and saves a new patch.
func (pr *PullRequest) UpdatePatch() error {
	if err := pr.GetHeadRepo(); err != nil {
		return fmt.Errorf("GetHeadRepo: %v", err)
	} else if pr.HeadRepo == nil {
		log.Trace("PullRequest[%d].UpdatePatch: ignored cruppted data", pr.ID)
		return nil
	}

	if err := pr.GetBaseRepo(); err != nil {
		return fmt.Errorf("GetBaseRepo: %v", err)
	}

	headRepoPath, err := pr.HeadRepo.RepoPath()
	if err != nil {
		return fmt.Errorf("HeadRepo.RepoPath: %v", err)
	}

	headGitRepo, err := git.OpenRepository(headRepoPath)
	if err != nil {
		return fmt.Errorf("OpenRepository: %v", err)
	}

	patch, err := headGitRepo.GetPatch(pr.MergeBase, pr.HeadBranch)
	if err != nil {
		return fmt.Errorf("GetPatch: %v", err)
	}

	if err = pr.BaseRepo.SavePatch(pr.Index, patch); err != nil {
		return fmt.Errorf("BaseRepo.SavePatch: %v", err)
	}

	return nil
}

func RetrieveBaseRepo(ctx *Context, repo *models.Repository) {
	// Non-fork repository will not return error in this method.
	if err := repo.GetBaseRepo(); err != nil {
		if models.IsErrRepoNotExist(err) {
			repo.IsFork = false
			repo.ForkID = 0
			return
		}
		ctx.Handle(500, "GetBaseRepo", err)
		return
	} else if err = repo.BaseRepo.GetOwner(); err != nil {
		ctx.Handle(500, "BaseRepo.GetOwner", err)
		return
	}

	bsaeRepo := repo.BaseRepo
	baseGitRepo, err := git.OpenRepository(models.RepoPath(bsaeRepo.Owner.Name, bsaeRepo.Name))
	if err != nil {
		ctx.Handle(500, "OpenRepository", err)
		return
	}
	if len(bsaeRepo.DefaultBranch) > 0 && baseGitRepo.IsBranchExist(bsaeRepo.DefaultBranch) {
		ctx.Data["BaseDefaultBranch"] = bsaeRepo.DefaultBranch
	} else {
		baseBranches, err := baseGitRepo.GetBranches()
		if err != nil {
			ctx.Handle(500, "GetBranches", err)
			return
		}
		if len(baseBranches) > 0 {
			ctx.Data["BaseDefaultBranch"] = baseBranches[0]
		}
	}
}

// MigrateRepository migrates a existing repository from other project hosting.
func MigrateRepository(u *User, name, desc string, private, mirror bool, url string) (*Repository, error) {
	repo, err := CreateRepository(u, CreateRepoOptions{
		Name:        name,
		Description: desc,
		IsPrivate:   private,
		IsMirror:    mirror,
	})
	if err != nil {
		return nil, err
	}

	// Clone to temprory path and do the init commit.
	tmpDir := filepath.Join(os.TempDir(), fmt.Sprintf("%d", time.Now().Nanosecond()))
	os.MkdirAll(tmpDir, os.ModePerm)

	repoPath := RepoPath(u.Name, name)

	if u.IsOrganization() {
		t, err := u.GetOwnerTeam()
		if err != nil {
			return nil, err
		}
		repo.NumWatches = t.NumMembers
	} else {
		repo.NumWatches = 1
	}

	repo.IsBare = false
	if mirror {
		if err = MirrorRepository(repo.ID, u.Name, repo.Name, repoPath, url); err != nil {
			return repo, err
		}
		repo.IsMirror = true
		return repo, UpdateRepository(repo, false)
	} else {
		os.RemoveAll(repoPath)
	}

	// FIXME: this command could for both migrate and mirror
	_, stderr, err := process.ExecTimeout(10*time.Minute,
		fmt.Sprintf("MigrateRepository: %s", repoPath),
		"git", "clone", "--mirror", "--bare", "--quiet", url, repoPath)
	if err != nil {
		return repo, fmt.Errorf("git clone --mirror --bare --quiet: %v", stderr)
	} else if err = createUpdateHook(repoPath); err != nil {
		return repo, fmt.Errorf("create update hook: %v", err)
	}

	// Check if repository has master branch, if so set it to default branch.
	gitRepo, err := git.OpenRepository(repoPath)
	if err != nil {
		return repo, fmt.Errorf("open git repository: %v", err)
	}
	if gitRepo.IsBranchExist("master") {
		repo.DefaultBranch = "master"
	}

	return repo, UpdateRepository(repo, false)
}

func CompareAndPullRequest(ctx *middleware.Context) {
	ctx.Data["Title"] = ctx.Tr("repo.pulls.compare_changes")
	ctx.Data["PageIsComparePull"] = true

	repo := ctx.Repo.Repository

	// Get compare branch information.
	infos := strings.Split(ctx.Params("*"), "...")
	if len(infos) != 2 {
		ctx.Handle(404, "CompareAndPullRequest", nil)
		return
	}

	baseBranch := infos[0]
	ctx.Data["BaseBranch"] = baseBranch

	headInfos := strings.Split(infos[1], ":")
	if len(headInfos) != 2 {
		ctx.Handle(404, "CompareAndPullRequest", nil)
		return
	}
	headUser := headInfos[0]
	headBranch := headInfos[1]
	ctx.Data["HeadBranch"] = headBranch

	// TODO: check if branches are valid.
	fmt.Println(baseBranch, headUser, headBranch)

	// TODO: add organization support
	// Check if current user has fork of repository.
	headRepo, has := models.HasForkedRepo(ctx.User.Id, repo.ID)
	if !has {
		ctx.Handle(404, "HasForkedRepo", nil)
		return
	}

	headGitRepo, err := git.OpenRepository(models.RepoPath(ctx.User.Name, headRepo.Name))
	if err != nil {
		ctx.Handle(500, "OpenRepository", err)
		return
	}
	headBranches, err := headGitRepo.GetBranches()
	if err != nil {
		ctx.Handle(500, "GetBranches", err)
		return
	}
	ctx.Data["HeadBranches"] = headBranches

	// Setup information for new form.
	RetrieveRepoMetas(ctx, ctx.Repo.Repository)
	if ctx.Written() {
		return
	}

	// Get diff information.

	ctx.HTML(200, COMPARE_PULL)
}

func GetDiffRange(repoPath, beforeCommitId string, afterCommitId string, maxlines int) (*Diff, error) {
	repo, err := git.OpenRepository(repoPath)
	if err != nil {
		return nil, err
	}

	commit, err := repo.GetCommit(afterCommitId)
	if err != nil {
		return nil, err
	}

	rd, wr := io.Pipe()
	var cmd *exec.Cmd
	// if "after" commit given
	if beforeCommitId == "" {
		// First commit of repository.
		if commit.ParentCount() == 0 {
			cmd = exec.Command("git", "show", afterCommitId)
		} else {
			c, _ := commit.Parent(0)
			cmd = exec.Command("git", "diff", c.Id.String(), afterCommitId)
		}
	} else {
		cmd = exec.Command("git", "diff", beforeCommitId, afterCommitId)
	}
	cmd.Dir = repoPath
	cmd.Stdout = wr
	cmd.Stdin = os.Stdin
	cmd.Stderr = os.Stderr

	done := make(chan error)
	go func() {
		cmd.Start()
		done <- cmd.Wait()
		wr.Close()
	}()
	defer rd.Close()

	desc := fmt.Sprintf("GetDiffRange(%s)", repoPath)
	pid := process.Add(desc, cmd)
	go func() {
		// In case process became zombie.
		select {
		case <-time.After(5 * time.Minute):
			if errKill := process.Kill(pid); errKill != nil {
				log.Error(4, "git_diff.ParsePatch(Kill): %v", err)
			}
			<-done
			// return "", ErrExecTimeout.Error(), ErrExecTimeout
		case err = <-done:
			process.Remove(pid)
		}
	}()

	return ParsePatch(pid, maxlines, cmd, rd)
}

func GetRepoArchive(ctx *middleware.Context) {
	repoPath := models.RepoPath(ctx.Params(":username"), ctx.Params(":reponame"))
	gitRepo, err := git.OpenRepository(repoPath)
	if err != nil {
		ctx.Handle(500, "RepoAssignment Invalid repo: "+repoPath, err)
		return
	}
	ctx.Repo.GitRepo = gitRepo

	repo.Download(ctx)
}

// https://github.com/gogits/go-gogs-client/wiki/Repositories-Contents#download-archive
func GetRepoArchive(ctx *middleware.Context) {
	repoPath := models.RepoPath(ctx.Params(":username"), ctx.Params(":reponame"))
	gitRepo, err := git.OpenRepository(repoPath)
	if err != nil {
		ctx.APIError(500, "OpenRepository", err)
		return
	}
	ctx.Repo.GitRepo = gitRepo

	repo.Download(ctx)
}

// UpdatePatch generates and saves a new patch.
func (pr *PullRequest) UpdatePatch() (err error) {
	if err = pr.GetHeadRepo(); err != nil {
		return fmt.Errorf("GetHeadRepo: %v", err)
	} else if pr.HeadRepo == nil {
		log.Trace("PullRequest[%d].UpdatePatch: ignored cruppted data", pr.ID)
		return nil
	}

	if err = pr.GetBaseRepo(); err != nil {
		return fmt.Errorf("GetBaseRepo: %v", err)
	} else if err = pr.BaseRepo.GetOwner(); err != nil {
		return fmt.Errorf("GetOwner: %v", err)
	}

	headRepoPath, err := pr.HeadRepo.RepoPath()
	if err != nil {
		return fmt.Errorf("HeadRepo.RepoPath: %v", err)
	}

	headGitRepo, err := git.OpenRepository(headRepoPath)
	if err != nil {
		return fmt.Errorf("OpenRepository: %v", err)
	}

	// Add a temporary remote.
	tmpRemote := com.ToStr(time.Now().UnixNano())
	if err = headGitRepo.AddRemote(tmpRemote, RepoPath(pr.BaseRepo.Owner.Name, pr.BaseRepo.Name)); err != nil {
		return fmt.Errorf("AddRemote: %v", err)
	}
	defer func() {
		headGitRepo.RemoveRemote(tmpRemote)
	}()
	remoteBranch := "remotes/" + tmpRemote + "/" + pr.BaseBranch
	pr.MergeBase, err = headGitRepo.GetMergeBase(remoteBranch, pr.HeadBranch)
	if err != nil {
		return fmt.Errorf("GetMergeBase: %v", err)
	} else if err = pr.Update(); err != nil {
		return fmt.Errorf("Update: %v", err)
	}

	patch, err := headGitRepo.GetPatch(pr.MergeBase, pr.HeadBranch)
	if err != nil {
		return fmt.Errorf("GetPatch: %v", err)
	}

	if err = pr.BaseRepo.SavePatch(pr.Index, patch); err != nil {
		return fmt.Errorf("BaseRepo.SavePatch: %v", err)
	}

	return nil
}

func PrepareViewPullInfo(ctx *middleware.Context, pull *models.Issue) *git.PullRequestInfo {
	repo := ctx.Repo.Repository

	ctx.Data["HeadTarget"] = pull.HeadUserName + "/" + pull.HeadBranch
	ctx.Data["BaseTarget"] = ctx.Repo.Owner.Name + "/" + pull.BaseBranch

	var (
		headGitRepo *git.Repository
		err         error
	)

	if err = pull.GetHeadRepo(); err != nil {
		ctx.Handle(500, "GetHeadRepo", err)
		return nil
	}

	if pull.HeadRepo != nil {
		headRepoPath, err := pull.HeadRepo.RepoPath()
		if err != nil {
			ctx.Handle(500, "HeadRepo.RepoPath", err)
			return nil
		}

		headGitRepo, err = git.OpenRepository(headRepoPath)
		if err != nil {
			ctx.Handle(500, "OpenRepository", err)
			return nil
		}
	}

	if pull.HeadRepo == nil || !headGitRepo.IsBranchExist(pull.HeadBranch) {
		ctx.Data["IsPullReuqestBroken"] = true
		ctx.Data["HeadTarget"] = "deleted"
		ctx.Data["NumCommits"] = 0
		ctx.Data["NumFiles"] = 0
		return nil
	}

	prInfo, err := headGitRepo.GetPullRequestInfo(models.RepoPath(repo.Owner.Name, repo.Name),
		pull.BaseBranch, pull.HeadBranch)
	if err != nil {
		ctx.Handle(500, "GetPullRequestInfo", err)
		return nil
	}
	ctx.Data["NumCommits"] = prInfo.Commits.Len()
	ctx.Data["NumFiles"] = prInfo.NumFiles
	return prInfo
}

func CompareAndPullRequest(ctx *middleware.Context) {
	// Get compare information.
	infos := strings.Split(ctx.Params("*"), "...")
	if len(infos) != 2 {
		ctx.Handle(404, "CompareAndPullRequest", nil)
		return
	}

	baseBranch := infos[0]
	ctx.Data["BaseBranch"] = baseBranch

	headInfos := strings.Split(infos[1], ":")
	if len(headInfos) != 2 {
		ctx.Handle(404, "CompareAndPullRequest", nil)
		return
	}
	headUser := headInfos[0]
	headBranch := headInfos[1]
	ctx.Data["HeadBranch"] = headBranch

	// TODO: check if branches are valid.
	fmt.Println(baseBranch, headUser, headBranch)

	// TODO: add organization support
	// Check if current user has fork of repository.
	headRepo, has := models.HasForkedRepo(ctx.User.Id, ctx.Repo.Repository.ID)
	if !has {
		ctx.Handle(404, "HasForkedRepo", nil)
		return
	}

	headGitRepo, err := git.OpenRepository(models.RepoPath(ctx.User.Name, headRepo.Name))
	if err != nil {
		ctx.Handle(500, "OpenRepository", err)
		return
	}
	headBranches, err := headGitRepo.GetBranches()
	if err != nil {
		ctx.Handle(500, "GetBranches", err)
		return
	}
	ctx.Data["HeadBranches"] = headBranches

	ctx.HTML(200, COMPARE_PULL)
}

func ViewPullFiles(ctx *middleware.Context) {
	ctx.Data["PageIsPullFiles"] = true

	pull := checkPullInfo(ctx)
	if ctx.Written() {
		return
	}

	var (
		diffRepoPath  string
		startCommitID string
		endCommitID   string
		gitRepo       *git.Repository
	)

	if pull.HasMerged {
		PrepareMergedViewPullInfo(ctx, pull)
		if ctx.Written() {
			return
		}

		diffRepoPath = ctx.Repo.GitRepo.Path
		startCommitID = pull.MergeBase
		endCommitID = pull.MergedCommitID
		gitRepo = ctx.Repo.GitRepo
	} else {
		prInfo := PrepareViewPullInfo(ctx, pull)
		if ctx.Written() {
			return
		} else if prInfo == nil {
			ctx.Handle(404, "ViewPullFiles", nil)
			return
		}

		headRepoPath := models.RepoPath(pull.HeadUserName, pull.HeadRepo.Name)

		headGitRepo, err := git.OpenRepository(headRepoPath)
		if err != nil {
			ctx.Handle(500, "OpenRepository", err)
			return
		}

		headCommitID, err := headGitRepo.GetCommitIdOfBranch(pull.HeadBranch)
		if err != nil {
			ctx.Handle(500, "GetCommitIdOfBranch", err)
			return
		}

		diffRepoPath = headRepoPath
		startCommitID = prInfo.MergeBase
		endCommitID = headCommitID
		gitRepo = headGitRepo
	}

	diff, err := models.GetDiffRange(diffRepoPath,
		startCommitID, endCommitID, setting.Git.MaxGitDiffLines)
	if err != nil {
		ctx.Handle(500, "GetDiffRange", err)
		return
	}
	ctx.Data["Diff"] = diff
	ctx.Data["DiffNotAvailable"] = diff.NumFiles() == 0

	commit, err := gitRepo.GetCommit(endCommitID)
	if err != nil {
		ctx.Handle(500, "GetCommit", err)
		return
	}

	headTarget := path.Join(pull.HeadUserName, pull.HeadRepo.Name)
	ctx.Data["Username"] = pull.HeadUserName
	ctx.Data["Reponame"] = pull.HeadRepo.Name
	ctx.Data["IsImageFile"] = commit.IsImageFile
	ctx.Data["SourcePath"] = setting.AppSubUrl + "/" + path.Join(headTarget, "src", endCommitID)
	ctx.Data["BeforeSourcePath"] = setting.AppSubUrl + "/" + path.Join(headTarget, "src", startCommitID)
	ctx.Data["RawPath"] = setting.AppSubUrl + "/" + path.Join(headTarget, "raw", endCommitID)

	ctx.HTML(200, PULL_FILES)
}

func ParseCompareInfo(ctx *middleware.Context) (*models.User, *models.Repository, *git.Repository, *git.PullRequestInfo, string, string) {
	// Get compare branch information.
	infos := strings.Split(ctx.Params("*"), "...")
	if len(infos) != 2 {
		ctx.Handle(404, "CompareAndPullRequest", nil)
		return nil, nil, nil, nil, "", ""
	}

	baseBranch := infos[0]
	ctx.Data["BaseBranch"] = baseBranch

	headInfos := strings.Split(infos[1], ":")
	if len(headInfos) != 2 {
		ctx.Handle(404, "CompareAndPullRequest", nil)
		return nil, nil, nil, nil, "", ""
	}
	headUsername := headInfos[0]
	headBranch := headInfos[1]
	ctx.Data["HeadBranch"] = headBranch

	headUser, err := models.GetUserByName(headUsername)
	if err != nil {
		if models.IsErrUserNotExist(err) {
			ctx.Handle(404, "GetUserByName", nil)
		} else {
			ctx.Handle(500, "GetUserByName", err)
		}
		return nil, nil, nil, nil, "", ""
	}

	repo := ctx.Repo.Repository

	// Check if base branch is valid.
	if !ctx.Repo.GitRepo.IsBranchExist(baseBranch) {
		ctx.Handle(404, "IsBranchExist", nil)
		return nil, nil, nil, nil, "", ""
	}

	// Check if current user has fork of repository.
	headRepo, has := models.HasForkedRepo(headUser.Id, repo.ID)
	if !has || (!ctx.User.IsAdminOfRepo(headRepo) && !ctx.User.IsAdmin) {
		ctx.Handle(404, "HasForkedRepo", nil)
		return nil, nil, nil, nil, "", ""
	}

	headGitRepo, err := git.OpenRepository(models.RepoPath(headUser.Name, headRepo.Name))
	if err != nil {
		ctx.Handle(500, "OpenRepository", err)
		return nil, nil, nil, nil, "", ""
	}

	// Check if head branch is valid.
	if !headGitRepo.IsBranchExist(headBranch) {
		ctx.Handle(404, "IsBranchExist", nil)
		return nil, nil, nil, nil, "", ""
	}

	headBranches, err := headGitRepo.GetBranches()
	if err != nil {
		ctx.Handle(500, "GetBranches", err)
		return nil, nil, nil, nil, "", ""
	}
	ctx.Data["HeadBranches"] = headBranches

	prInfo, err := headGitRepo.GetPullRequestInfo(models.RepoPath(repo.Owner.Name, repo.Name), baseBranch, headBranch)
	if err != nil {
		ctx.Handle(500, "GetPullRequestInfo", err)
		return nil, nil, nil, nil, "", ""
	}
	ctx.Data["BeforeCommitID"] = prInfo.MergeBase

	return headUser, headRepo, headGitRepo, prInfo, baseBranch, headBranch
}

func Update(refName, oldCommitId, newCommitId, userName, repoUserName, repoName string, userId int64) error {
	isNew := strings.HasPrefix(oldCommitId, "0000000")
	if isNew &&
		strings.HasPrefix(newCommitId, "0000000") {
		return fmt.Errorf("old rev and new rev both 000000")
	}

	f := RepoPath(repoUserName, repoName)

	gitUpdate := exec.Command("git", "update-server-info")
	gitUpdate.Dir = f
	gitUpdate.Run()

	isDel := strings.HasPrefix(newCommitId, "0000000")
	if isDel {
		log.GitLogger.Info("del rev", refName, "from", userName+"/"+repoName+".git", "by", userId)
		return nil
	}

	repo, err := git.OpenRepository(f)
	if err != nil {
		return fmt.Errorf("runUpdate.Open repoId: %v", err)
	}

	ru, err := GetUserByName(repoUserName)
	if err != nil {
		return fmt.Errorf("runUpdate.GetUserByName: %v", err)
	}

	repos, err := GetRepositoryByName(ru.Id, repoName)
	if err != nil {
		return fmt.Errorf("runUpdate.GetRepositoryByName userId: %v", err)
	}

	// Push tags.
	if strings.HasPrefix(refName, "refs/tags/") {
		tagName := git.RefEndName(refName)
		tag, err := repo.GetTag(tagName)
		if err != nil {
			log.GitLogger.Fatal(4, "runUpdate.GetTag: %v", err)
		}

		var actEmail string
		if tag.Tagger != nil {
			actEmail = tag.Tagger.Email
		} else {
			cmt, err := tag.Commit()
			if err != nil {
				log.GitLogger.Fatal(4, "runUpdate.GetTag Commit: %v", err)
			}
			actEmail = cmt.Committer.Email
		}

		commit := &base.PushCommits{}

		if err = CommitRepoAction(userId, ru.Id, userName, actEmail,
			repos.ID, repoUserName, repoName, refName, commit, oldCommitId, newCommitId); err != nil {
			log.GitLogger.Fatal(4, "CommitRepoAction: %s/%s:%v", repoUserName, repoName, err)
		}
		return err
	}

	newCommit, err := repo.GetCommit(newCommitId)
	if err != nil {
		return fmt.Errorf("runUpdate GetCommit of newCommitId: %v", err)
	}

	// Push new branch.
	var l *list.List
	if isNew {
		l, err = newCommit.CommitsBefore()
		if err != nil {
			return fmt.Errorf("CommitsBefore: %v", err)
		}
	} else {
		l, err = newCommit.CommitsBeforeUntil(oldCommitId)
		if err != nil {
			return fmt.Errorf("CommitsBeforeUntil: %v", err)
		}
	}

	if err != nil {
		return fmt.Errorf("runUpdate.Commit repoId: %v", err)
	}

	// Push commits.
	commits := make([]*base.PushCommit, 0)
	var actEmail string
	for e := l.Front(); e != nil; e = e.Next() {
		commit := e.Value.(*git.Commit)
		if actEmail == "" {
			actEmail = commit.Committer.Email
		}
		commits = append(commits,
			&base.PushCommit{commit.ID.String(),
				commit.Message(),
				commit.Author.Email,
				commit.Author.Name,
			})
	}
//.........这里部分代码省略.........

// Merge merges pull request to base repository.
func (pr *PullRequest) Merge(doer *User, baseGitRepo *git.Repository) (err error) {
	sess := x.NewSession()
	defer sessionRelease(sess)
	if err = sess.Begin(); err != nil {
		return err
	}

	if err = pr.Issue.changeStatus(sess, doer, true); err != nil {
		return fmt.Errorf("Pull.changeStatus: %v", err)
	}

	headRepoPath := RepoPath(pr.HeadUserName, pr.HeadRepo.Name)
	headGitRepo, err := git.OpenRepository(headRepoPath)
	if err != nil {
		return fmt.Errorf("OpenRepository: %v", err)
	}
	pr.MergedCommitID, err = headGitRepo.GetCommitIdOfBranch(pr.HeadBranch)
	if err != nil {
		return fmt.Errorf("GetCommitIdOfBranch: %v", err)
	}

	if err = mergePullRequestAction(sess, doer, pr.Issue.Repo, pr.Issue); err != nil {
		return fmt.Errorf("mergePullRequestAction: %v", err)
	}

	pr.HasMerged = true
	pr.Merged = time.Now()
	pr.MergerID = doer.Id
	if _, err = sess.Id(pr.ID).AllCols().Update(pr); err != nil {
		return fmt.Errorf("update pull request: %v", err)
	}

	// Clone base repo.
	tmpBasePath := path.Join("data/tmp/repos", com.ToStr(time.Now().Nanosecond())+".git")
	os.MkdirAll(path.Dir(tmpBasePath), os.ModePerm)
	defer os.RemoveAll(path.Dir(tmpBasePath))

	var stderr string
	if _, stderr, err = process.ExecTimeout(5*time.Minute,
		fmt.Sprintf("PullRequest.Merge(git clone): %s", tmpBasePath),
		"git", "clone", baseGitRepo.Path, tmpBasePath); err != nil {
		return fmt.Errorf("git clone: %s", stderr)
	}

	// Check out base branch.
	if _, stderr, err = process.ExecDir(-1, tmpBasePath,
		fmt.Sprintf("PullRequest.Merge(git checkout): %s", tmpBasePath),
		"git", "checkout", pr.BaseBranch); err != nil {
		return fmt.Errorf("git checkout: %s", stderr)
	}

	// Pull commits.
	if _, stderr, err = process.ExecDir(-1, tmpBasePath,
		fmt.Sprintf("PullRequest.Merge(git pull): %s", tmpBasePath),
		"git", "pull", headRepoPath, pr.HeadBranch); err != nil {
		return fmt.Errorf("git pull[%s / %s -> %s]: %s", headRepoPath, pr.HeadBranch, tmpBasePath, stderr)
	}

	// Push back to upstream.
	if _, stderr, err = process.ExecDir(-1, tmpBasePath,
		fmt.Sprintf("PullRequest.Merge(git push): %s", tmpBasePath),
		"git", "push", baseGitRepo.Path, pr.BaseBranch); err != nil {
		return fmt.Errorf("git push: %s", stderr)
	}

	return sess.Commit()
}

// RepoRef handles repository reference name including those contain `/`.
func RepoRef() macaron.Handler {
	return func(ctx *Context) {
		var (
			refName string
			err     error
		)

		// For API calls.
		if ctx.Repo.GitRepo == nil {
			repoPath := models.RepoPath(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
			gitRepo, err := git.OpenRepository(repoPath)
			if err != nil {
				ctx.Handle(500, "RepoRef Invalid repo "+repoPath, err)
				return
			}
			ctx.Repo.GitRepo = gitRepo
		}

		// Get default branch.
		if len(ctx.Params("*")) == 0 {
			refName = ctx.Repo.Repository.DefaultBranch
			if !ctx.Repo.GitRepo.IsBranchExist(refName) {
				brs, err := ctx.Repo.GitRepo.GetBranches()
				if err != nil {
					ctx.Handle(500, "GetBranches", err)
					return
				}
				refName = brs[0]
			}
			ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetCommitOfBranch(refName)
			if err != nil {
				ctx.Handle(500, "GetCommitOfBranch", err)
				return
			}
			ctx.Repo.CommitID = ctx.Repo.Commit.Id.String()
			ctx.Repo.IsBranch = true

		} else {
			hasMatched := false
			parts := strings.Split(ctx.Params("*"), "/")
			for i, part := range parts {
				refName = strings.TrimPrefix(refName+"/"+part, "/")

				if ctx.Repo.GitRepo.IsBranchExist(refName) ||
					ctx.Repo.GitRepo.IsTagExist(refName) {
					if i < len(parts)-1 {
						ctx.Repo.TreeName = strings.Join(parts[i+1:], "/")
					}
					hasMatched = true
					break
				}
			}
			if !hasMatched && len(parts[0]) == 40 {
				refName = parts[0]
				ctx.Repo.TreeName = strings.Join(parts[1:], "/")
			}

			if ctx.Repo.GitRepo.IsBranchExist(refName) {
				ctx.Repo.IsBranch = true

				ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetCommitOfBranch(refName)
				if err != nil {
					ctx.Handle(500, "GetCommitOfBranch", err)
					return
				}
				ctx.Repo.CommitID = ctx.Repo.Commit.Id.String()

			} else if ctx.Repo.GitRepo.IsTagExist(refName) {
				ctx.Repo.IsTag = true
				ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetCommitOfTag(refName)
				if err != nil {
					ctx.Handle(500, "GetCommitOfTag", err)
					return
				}
				ctx.Repo.CommitID = ctx.Repo.Commit.Id.String()
			} else if len(refName) == 40 {
				ctx.Repo.IsCommit = true
				ctx.Repo.CommitID = refName

				ctx.Repo.Commit, err = ctx.Repo.GitRepo.GetCommit(refName)
				if err != nil {
					ctx.Handle(404, "GetCommit", nil)
					return
				}
			} else {
				ctx.Handle(404, "RepoRef invalid repo", fmt.Errorf("branch or tag not exist: %s", refName))
				return
			}
		}

		ctx.Repo.BranchName = refName
		ctx.Data["BranchName"] = ctx.Repo.BranchName
		ctx.Data["CommitID"] = ctx.Repo.CommitID
		ctx.Data["IsBranch"] = ctx.Repo.IsBranch
		ctx.Data["IsTag"] = ctx.Repo.IsTag
		ctx.Data["IsCommit"] = ctx.Repo.IsCommit

		ctx.Repo.CommitsCount, err = ctx.Repo.Commit.CommitsCount()
		if err != nil {
//.........这里部分代码省略.........