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gitea/models/repo_branch.go
Filip Navara 2af67f6044 Improve listing performance by using go-git (#6478)
* Use go-git for tree reading and commit info lookup.

Signed-off-by: Filip Navara <navara@emclient.com>

* Use TreeEntry.IsRegular() instead of ObjectType that was removed.

Signed-off-by: Filip Navara <navara@emclient.com>

* Use the treePath to optimize commit info search.

Signed-off-by: Filip Navara <navara@emclient.com>

* Extract the latest commit at treePath along with the other commits.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix listing commit info for a directory that was created in one commit and never modified after.

Signed-off-by: Filip Navara <navara@emclient.com>

* Avoid nearly all external 'git' invocations when doing directory listing (.editorconfig code path is still hit).

Signed-off-by: Filip Navara <navara@emclient.com>

* Use go-git for reading blobs.

Signed-off-by: Filip Navara <navara@emclient.com>

* Make SHA1 type alias for plumbing.Hash in go-git.

Signed-off-by: Filip Navara <navara@emclient.com>

* Make Signature type alias for object.Signature in go-git.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix GetCommitsInfo for repository with only one commit.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix PGP signature verification.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix issues with walking commit graph across merges.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix typo in condition.

Signed-off-by: Filip Navara <navara@emclient.com>

* Speed up loading branch list by keeping the repository reference (and thus all the loaded packfile indexes).

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix lising submodules.

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix build

Signed-off-by: Filip Navara <navara@emclient.com>

* Add back commit cache because of name-rev

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix tests

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix code style

* Fix spelling

* Address PR feedback

Signed-off-by: Filip Navara <navara@emclient.com>

* Update vendor module list

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix getting trees by commit id

Signed-off-by: Filip Navara <navara@emclient.com>

* Fix remaining unit test failures

* Fix GetTreeBySHA

* Avoid running `git name-rev` if not necessary

Signed-off-by: Filip Navara <navara@emclient.com>

* Move Branch code to git module

* Clean up GPG signature verification and fix it for tagged commits

* Address PR feedback (import formatting, copyright headers)

* Make blob lookup by SHA working

* Update tests to use public API

* Allow getting content from any type of object through the blob interface

* Change test to actually expect the object content that is in the GIT repository

* Change one more test to actually expect the object content that is in the GIT repository

* Add comments
2019-04-19 20:17:27 +08:00

231 lines
7 KiB
Go

// Copyright 2016 The Gogs Authors. All rights reserved.
// 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 models
import (
"fmt"
"time"
"code.gitea.io/gitea/modules/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)
}
// deleteLocalBranch deletes a branch from a local repo cache
// First checks out default branch to avoid trying to delete the currently checked out branch
func deleteLocalBranch(localPath, defaultBranch, deleteBranch string) error {
if !com.IsExist(localPath) {
return nil
}
if !git.IsBranchExist(localPath, deleteBranch) {
return nil
}
// Must NOT have branch currently checked out
// Checkout default branch first
if err := git.Checkout(localPath, git.CheckoutOptions{
Timeout: time.Duration(setting.Git.Timeout.Pull) * time.Second,
Branch: defaultBranch,
}); err != nil {
return fmt.Errorf("git checkout %s: %v", defaultBranch, err)
}
cmd := git.NewCommand("branch")
cmd.AddArguments("-D")
cmd.AddArguments(deleteBranch)
_, err := cmd.RunInDir(localPath)
return err
}
// DeleteLocalBranch deletes a branch from the local repo
func (repo *Repository) DeleteLocalBranch(branchName string) error {
return deleteLocalBranch(repo.LocalCopyPath(), repo.DefaultBranch, branchName)
}
// 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 its name
func (repo *Repository) GetBranch(branch string) (*git.Branch, error) {
gitRepo, err := git.OpenRepository(repo.RepoPath())
if err != nil {
return nil, err
}
return gitRepo.GetBranch(branch)
}
// GetBranches returns all the branches of a repository
func (repo *Repository) GetBranches() ([]*git.Branch, error) {
return git.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
}
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}
}
}
if _, err := gitRepo.GetTag(name); err == nil {
return ErrTagAlreadyExists{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
}