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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package repository
import (
"context"
"errors"
"fmt"
"strings"
"code.gitea.io/gitea/models"
"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/log"
"code.gitea.io/gitea/modules/notification"
repo_module "code.gitea.io/gitea/modules/repository"
pull_service "code.gitea.io/gitea/services/pull"
)
// CreateNewBranch creates a new repository branch
func CreateNewBranch(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, oldBranchName, branchName string) (err error) {
// Check if branch name can be used
if err := checkBranchName(ctx, repo, branchName); err != nil {
return err
}
if !git.IsBranchExist(ctx, repo.RepoPath(), oldBranchName) {
return models.ErrBranchDoesNotExist{
BranchName: oldBranchName,
}
}
if err := git.Push(ctx, repo.RepoPath(), git.PushOptions{
Remote: repo.RepoPath(),
Branch: fmt.Sprintf("%s%s:%s%s", git.BranchPrefix, oldBranchName, git.BranchPrefix, branchName),
Env: repo_module.PushingEnvironment(doer, repo),
}); err != nil {
if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
return err
}
return fmt.Errorf("Push: %w", err)
}
return nil
}
// GetBranches returns branches from the repository, skipping skip initial branches and
// returning at most limit branches, or all branches if limit is 0.
func GetBranches(ctx context.Context, repo *repo_model.Repository, skip, limit int) ([]*git.Branch, int, error) {
return git.GetBranchesByPath(ctx, repo.RepoPath(), skip, limit)
}
// checkBranchName validates branch name with existing repository branches
func checkBranchName(ctx context.Context, repo *repo_model.Repository, name string) error {
_, err := git.WalkReferences(ctx, repo.RepoPath(), func(_, refName string) error {
branchRefName := strings.TrimPrefix(refName, git.BranchPrefix)
switch {
case branchRefName == name:
return models.ErrBranchAlreadyExists{
BranchName: name,
}
// If branchRefName like a/b but we want to create a branch named a then we have a conflict
case strings.HasPrefix(branchRefName, name+"/"):
return models.ErrBranchNameConflict{
BranchName: branchRefName,
}
// Conversely if branchRefName like a but we want to create a branch named a/b then we also have a conflict
case strings.HasPrefix(name, branchRefName+"/"):
return models.ErrBranchNameConflict{
BranchName: branchRefName,
}
case refName == git.TagPrefix+name:
return models.ErrTagAlreadyExists{
TagName: name,
}
}
return nil
})
return err
}
// CreateNewBranchFromCommit creates a new repository branch
func CreateNewBranchFromCommit(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, commit, branchName string) (err error) {
// Check if branch name can be used
if err := checkBranchName(ctx, repo, branchName); err != nil {
return err
}
if err := git.Push(ctx, repo.RepoPath(), git.PushOptions{
Remote: repo.RepoPath(),
Branch: fmt.Sprintf("%s:%s%s", commit, git.BranchPrefix, branchName),
Env: repo_module.PushingEnvironment(doer, repo),
}); err != nil {
if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
return err
}
return fmt.Errorf("Push: %w", err)
}
return nil
}
// RenameBranch rename a branch
func RenameBranch(repo *repo_model.Repository, doer *user_model.User, gitRepo *git.Repository, from, to string) (string, error) {
if from == to {
return "target_exist", nil
}
if gitRepo.IsBranchExist(to) {
return "target_exist", nil
}
if !gitRepo.IsBranchExist(from) {
return "from_not_exist", nil
}
if err := git_model.RenameBranch(db.DefaultContext, repo, from, to, func(isDefault bool) error {
err2 := gitRepo.RenameBranch(from, to)
if err2 != nil {
return err2
}
if isDefault {
err2 = gitRepo.SetDefaultBranch(to)
if err2 != nil {
return err2
}
}
return nil
}); err != nil {
return "", err
}
refID, err := gitRepo.GetRefCommitID(git.BranchPrefix + to)
if err != nil {
return "", err
}
notification.NotifyDeleteRef(db.DefaultContext, doer, repo, "branch", git.BranchPrefix+from)
notification.NotifyCreateRef(db.DefaultContext, doer, repo, "branch", git.BranchPrefix+to, refID)
return "", nil
}
// enmuerates all branch related errors
var (
ErrBranchIsDefault = errors.New("branch is default")
ErrBranchIsProtected = errors.New("branch is protected")
)
// DeleteBranch delete branch
func DeleteBranch(doer *user_model.User, repo *repo_model.Repository, gitRepo *git.Repository, branchName string) error {
if branchName == repo.DefaultBranch {
return ErrBranchIsDefault
}
isProtected, err := git_model.IsProtectedBranch(db.DefaultContext, repo.ID, branchName)
if err != nil {
return err
}
if isProtected {
return ErrBranchIsProtected
}
commit, err := gitRepo.GetBranchCommit(branchName)
if err != nil {
return err
}
if err := gitRepo.DeleteBranch(branchName, git.DeleteBranchOptions{
Force: true,
}); err != nil {
return err
}
if err := pull_service.CloseBranchPulls(doer, repo.ID, branchName); err != nil {
return err
}
// Don't return error below this
if err := PushUpdate(
&repo_module.PushUpdateOptions{
RefFullName: git.BranchPrefix + branchName,
OldCommitID: commit.ID.String(),
NewCommitID: git.EmptySHA,
PusherID: doer.ID,
PusherName: doer.Name,
RepoUserName: repo.OwnerName,
RepoName: repo.Name,
}); err != nil {
log.Error("Update: %v", err)
}
if err := git_model.AddDeletedBranch(db.DefaultContext, repo.ID, branchName, commit.ID.String(), doer.ID); err != nil {
log.Warn("AddDeletedBranch: %v", err)
}
return nil
}
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