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// Copyright 2016 The Gogs 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 models
import (
"fmt"
"time"
"code.gitea.io/git"
"code.gitea.io/gitea/modules/setting"
"github.com/Unknwon/com"
)
// discardLocalRepoBranchChanges discards local commits/changes of
// given branch to make sure it is even to remote branch.
func discardLocalRepoBranchChanges(localPath, branch string) error {
if !com.IsExist(localPath) {
return nil
}
// No need to check if nothing in the repository.
if !git.IsBranchExist(localPath, branch) {
return nil
}
refName := "origin/" + branch
if err := git.ResetHEAD(localPath, true, refName); err != nil {
return fmt.Errorf("git reset --hard %s: %v", refName, err)
}
return nil
}
// DiscardLocalRepoBranchChanges discards the local repository branch changes
func (repo *Repository) DiscardLocalRepoBranchChanges(branch string) error {
return discardLocalRepoBranchChanges(repo.LocalCopyPath(), branch)
}
// checkoutNewBranch checks out to a new branch from the a branch name.
func checkoutNewBranch(repoPath, localPath, oldBranch, newBranch string) error {
if err := git.Checkout(localPath, git.CheckoutOptions{
Timeout: time.Duration(setting.Git.Timeout.Pull) * time.Second,
Branch: newBranch,
OldBranch: oldBranch,
}); err != nil {
return fmt.Errorf("git checkout -b %s %s: %v", newBranch, oldBranch, err)
}
return nil
}
// CheckoutNewBranch checks out a new branch
func (repo *Repository) CheckoutNewBranch(oldBranch, newBranch string) error {
return checkoutNewBranch(repo.RepoPath(), repo.LocalCopyPath(), oldBranch, newBranch)
}
// Branch holds the branch information
type Branch struct {
Path string
Name string
}
// GetBranchesByPath returns a branch by it's path
func GetBranchesByPath(path string) ([]*Branch, error) {
gitRepo, err := git.OpenRepository(path)
if err != nil {
return nil, err
}
brs, err := gitRepo.GetBranches()
if err != nil {
return nil, err
}
branches := make([]*Branch, len(brs))
for i := range brs {
branches[i] = &Branch{
Path: path,
Name: brs[i],
}
}
return branches, nil
}
// CanCreateBranch returns true if repository meets the requirements for creating new branches.
func (repo *Repository) CanCreateBranch() bool {
return !repo.IsMirror
}
// GetBranch returns a branch by it's name
func (repo *Repository) GetBranch(branch string) (*Branch, error) {
if !git.IsBranchExist(repo.RepoPath(), branch) {
return nil, ErrBranchNotExist{branch}
}
return &Branch{
Path: repo.RepoPath(),
Name: branch,
}, nil
}
// GetBranches returns all the branches of a repository
func (repo *Repository) GetBranches() ([]*Branch, error) {
return GetBranchesByPath(repo.RepoPath())
}
// CheckBranchName validates branch name with existing repository branches
func (repo *Repository) CheckBranchName(name string) error {
gitRepo, err := git.OpenRepository(repo.RepoPath())
if err != nil {
return err
}
if _, err := gitRepo.GetTag(name); err == nil {
return ErrTagAlreadyExists{name}
}
branches, err := repo.GetBranches()
if err != nil {
return err
}
for _, branch := range branches {
if branch.Name == name {
return ErrBranchAlreadyExists{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 ErrBranchNameConflict{branch.Name}
}
}
return nil
}
// CreateNewBranch creates a new repository branch
func (repo *Repository) CreateNewBranch(doer *User, oldBranchName, branchName string) (err error) {
repoWorkingPool.CheckIn(com.ToStr(repo.ID))
defer repoWorkingPool.CheckOut(com.ToStr(repo.ID))
// Check if branch name can be used
if err := repo.CheckBranchName(branchName); err != nil {
return err
}
localPath := repo.LocalCopyPath()
if err = discardLocalRepoBranchChanges(localPath, oldBranchName); err != nil {
return fmt.Errorf("discardLocalRepoChanges: %v", err)
} else if err = repo.UpdateLocalCopyBranch(oldBranchName); err != nil {
return fmt.Errorf("UpdateLocalCopyBranch: %v", err)
}
if err = repo.CheckoutNewBranch(oldBranchName, branchName); err != nil {
return fmt.Errorf("CreateNewBranch: %v", err)
}
if err = git.Push(localPath, git.PushOptions{
Remote: "origin",
Branch: branchName,
}); err != nil {
return fmt.Errorf("Push: %v", err)
}
return nil
}
// updateLocalCopyToCommit pulls latest changes of given commit from repoPath to localPath.
// It creates a new clone if local copy does not exist.
// This function checks out target commit by default, it is safe to assume subsequent
// operations are operating against target commit when caller has confidence for no race condition.
func updateLocalCopyToCommit(repoPath, localPath, commit string) error {
if !com.IsExist(localPath) {
if err := git.Clone(repoPath, localPath, git.CloneRepoOptions{
Timeout: time.Duration(setting.Git.Timeout.Clone) * time.Second,
}); err != nil {
return fmt.Errorf("git clone: %v", err)
}
} else {
_, err := git.NewCommand("fetch", "origin").RunInDir(localPath)
if err != nil {
return fmt.Errorf("git fetch origin: %v", err)
}
if err := git.ResetHEAD(localPath, true, "HEAD"); err != nil {
return fmt.Errorf("git reset --hard HEAD: %v", err)
}
}
if err := git.Checkout(localPath, git.CheckoutOptions{
Branch: commit,
}); err != nil {
return fmt.Errorf("git checkout %s: %v", commit, err)
}
return nil
}
// updateLocalCopyToCommit makes sure local copy of repository is at given commit.
func (repo *Repository) updateLocalCopyToCommit(commit string) error {
return updateLocalCopyToCommit(repo.RepoPath(), repo.LocalCopyPath(), commit)
}
// CreateNewBranchFromCommit creates a new repository branch
func (repo *Repository) CreateNewBranchFromCommit(doer *User, commit, branchName string) (err error) {
repoWorkingPool.CheckIn(com.ToStr(repo.ID))
defer repoWorkingPool.CheckOut(com.ToStr(repo.ID))
// Check if branch name can be used
if err := repo.CheckBranchName(branchName); err != nil {
return err
}
localPath := repo.LocalCopyPath()
if err = repo.updateLocalCopyToCommit(commit); err != nil {
return fmt.Errorf("UpdateLocalCopyBranch: %v", err)
}
if err = repo.CheckoutNewBranch(commit, branchName); err != nil {
return fmt.Errorf("CheckoutNewBranch: %v", err)
}
if err = git.Push(localPath, git.PushOptions{
Remote: "origin",
Branch: branchName,
}); err != nil {
return fmt.Errorf("Push: %v", err)
}
return nil
}
// GetCommit returns all the commits of a branch
func (branch *Branch) GetCommit() (*git.Commit, error) {
gitRepo, err := git.OpenRepository(branch.Path)
if err != nil {
return nil, err
}
return gitRepo.GetBranchCommit(branch.Name)
}
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