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mirror of https://github.com/go-gitea/gitea synced 2024-11-05 01:34:25 +00:00
gitea/modules/repository/branch.go
zeripath 320031fce6
Handle more pathological branch and tag names (#11843) (#11863)
Backport #11843

It's possible to push quite pathological appearing branch names to gitea
using git push gitea reasonable-branch:refs/heads/-- at which point
large parts of the UI will break. Similarly you can git push origin
reasonable-tag:refs/tags/-- which wil return an error.

This PR fixes the problems these cause. It also changes the code from
creating branches to pushing to ensure that branch restoration has to
pass hooks.

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2020-06-12 14:01:44 -04:00

110 lines
2.9 KiB
Go

// Copyright 2020 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 (
"fmt"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
)
// GetBranch returns a branch by its name
func GetBranch(repo *models.Repository, branch string) (*git.Branch, error) {
gitRepo, err := git.OpenRepository(repo.RepoPath())
if err != nil {
return nil, err
}
defer gitRepo.Close()
return gitRepo.GetBranch(branch)
}
// GetBranches returns all the branches of a repository
func GetBranches(repo *models.Repository) ([]*git.Branch, error) {
return git.GetBranchesByPath(repo.RepoPath())
}
// checkBranchName validates branch name with existing repository branches
func checkBranchName(repo *models.Repository, name string) error {
gitRepo, err := git.OpenRepository(repo.RepoPath())
if err != nil {
return err
}
defer gitRepo.Close()
branches, err := GetBranches(repo)
if err != nil {
return err
}
for _, branch := range branches {
if branch.Name == name {
return models.ErrBranchAlreadyExists{
BranchName: branch.Name,
}
} else if (len(branch.Name) < len(name) && branch.Name+"/" == name[0:len(branch.Name)+1]) ||
(len(branch.Name) > len(name) && name+"/" == branch.Name[0:len(name)+1]) {
return models.ErrBranchNameConflict{
BranchName: branch.Name,
}
}
}
if _, err := gitRepo.GetTag(name); err == nil {
return models.ErrTagAlreadyExists{
TagName: name,
}
}
return nil
}
// CreateNewBranch creates a new repository branch
func CreateNewBranch(doer *models.User, repo *models.Repository, oldBranchName, branchName string) (err error) {
// Check if branch name can be used
if err := checkBranchName(repo, branchName); err != nil {
return err
}
if !git.IsBranchExist(repo.RepoPath(), oldBranchName) {
return fmt.Errorf("OldBranch: %s does not exist. Cannot create new branch from this", oldBranchName)
}
if err := git.Push(repo.RepoPath(), git.PushOptions{
Remote: repo.RepoPath(),
Branch: fmt.Sprintf("%s:%s%s", oldBranchName, git.BranchPrefix, branchName),
Env: models.PushingEnvironment(doer, repo),
}); err != nil {
if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
return err
}
return fmt.Errorf("Push: %v", err)
}
return nil
}
// CreateNewBranchFromCommit creates a new repository branch
func CreateNewBranchFromCommit(doer *models.User, repo *models.Repository, commit, branchName string) (err error) {
// Check if branch name can be used
if err := checkBranchName(repo, branchName); err != nil {
return err
}
if err := git.Push(repo.RepoPath(), git.PushOptions{
Remote: repo.RepoPath(),
Branch: fmt.Sprintf("%s:%s%s", commit, git.BranchPrefix, branchName),
Env: models.PushingEnvironment(doer, repo),
}); err != nil {
if git.IsErrPushOutOfDate(err) || git.IsErrPushRejected(err) {
return err
}
return fmt.Errorf("Push: %v", err)
}
return nil
}