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pull.go
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pull.go
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// Copyright 2015 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"
"os"
"path"
"strings"
"time"
"github.com/Unknwon/com"
"github.com/go-xorm/xorm"
"github.com/gogits/git-module"
api "github.com/gogits/go-gogs-client"
"github.com/gogits/gogs/modules/log"
"github.com/gogits/gogs/modules/process"
"github.com/gogits/gogs/modules/setting"
)
type PullRequestType int
const (
PULL_REQUEST_GOGS PullRequestType = iota
PLLL_ERQUEST_GIT
)
type PullRequestStatus int
const (
PULL_REQUEST_STATUS_CONFLICT PullRequestStatus = iota
PULL_REQUEST_STATUS_CHECKING
PULL_REQUEST_STATUS_MERGEABLE
)
// PullRequest represents relation between pull request and repositories.
type PullRequest struct {
ID int64 `xorm:"pk autoincr"`
Type PullRequestType
Status PullRequestStatus
IssueID int64 `xorm:"INDEX"`
Issue *Issue `xorm:"-"`
Index int64
HeadRepoID int64
HeadRepo *Repository `xorm:"-"`
BaseRepoID int64
BaseRepo *Repository `xorm:"-"`
HeadUserName string
HeadBranch string
BaseBranch string
MergeBase string `xorm:"VARCHAR(40)"`
HasMerged bool
MergedCommitID string `xorm:"VARCHAR(40)"`
Merged time.Time
MergerID int64
Merger *User `xorm:"-"`
}
// Note: don't try to get Pull because will end up recursive querying.
func (pr *PullRequest) AfterSet(colName string, _ xorm.Cell) {
switch colName {
case "merged":
if !pr.HasMerged {
return
}
pr.Merged = regulateTimeZone(pr.Merged)
}
}
func (pr *PullRequest) getHeadRepo(e Engine) (err error) {
pr.HeadRepo, err = getRepositoryByID(e, pr.HeadRepoID)
if err != nil && !IsErrRepoNotExist(err) {
return fmt.Errorf("getRepositoryByID(head): %v", err)
}
return nil
}
func (pr *PullRequest) GetHeadRepo() (err error) {
return pr.getHeadRepo(x)
}
func (pr *PullRequest) GetBaseRepo() (err error) {
if pr.BaseRepo != nil {
return nil
}
pr.BaseRepo, err = GetRepositoryByID(pr.BaseRepoID)
if err != nil {
return fmt.Errorf("GetRepositoryByID(base): %v", err)
}
return nil
}
func (pr *PullRequest) GetMerger() (err error) {
if !pr.HasMerged || pr.Merger != nil {
return nil
}
pr.Merger, err = GetUserByID(pr.MergerID)
if IsErrUserNotExist(err) {
pr.MergerID = -1
pr.Merger = NewFakeUser()
} else if err != nil {
return fmt.Errorf("GetUserByID: %v", err)
}
return nil
}
// IsChecking returns true if this pull request is still checking conflict.
func (pr *PullRequest) IsChecking() bool {
return pr.Status == PULL_REQUEST_STATUS_CHECKING
}
// CanAutoMerge returns true if this pull request can be merged automatically.
func (pr *PullRequest) CanAutoMerge() bool {
return pr.Status == PULL_REQUEST_STATUS_MERGEABLE
}
// Merge merges pull request to base repository.
func (pr *PullRequest) Merge(doer *User, baseGitRepo *git.Repository) (err error) {
if err = pr.GetHeadRepo(); err != nil {
return fmt.Errorf("GetHeadRepo: %v", err)
} else if err = pr.GetBaseRepo(); err != nil {
return fmt.Errorf("GetBaseRepo: %v", err)
}
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("Issue.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.GetBranchCommitID(pr.HeadBranch)
if err != nil {
return fmt.Errorf("GetBranchCommitID: %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(setting.AppDataPath, "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)
}
// Add head repo remote.
if _, stderr, err = process.ExecDir(-1, tmpBasePath,
fmt.Sprintf("PullRequest.Merge (git remote add): %s", tmpBasePath),
"git", "remote", "add", "head_repo", headRepoPath); err != nil {
return fmt.Errorf("git remote add [%s -> %s]: %s", headRepoPath, tmpBasePath, stderr)
}
// Merge commits.
if _, stderr, err = process.ExecDir(-1, tmpBasePath,
fmt.Sprintf("PullRequest.Merge (git fetch): %s", tmpBasePath),
"git", "fetch", "head_repo"); err != nil {
return fmt.Errorf("git fetch [%s -> %s]: %s", headRepoPath, tmpBasePath, stderr)
}
if _, stderr, err = process.ExecDir(-1, tmpBasePath,
fmt.Sprintf("PullRequest.Merge (git merge --no-ff --no-commit): %s", tmpBasePath),
"git", "merge", "--no-ff", "--no-commit", "head_repo/"+pr.HeadBranch); err != nil {
return fmt.Errorf("git merge --no-ff --no-commit [%s]: %v - %s", tmpBasePath, err, stderr)
}
sig := doer.NewGitSig()
if _, stderr, err = process.ExecDir(-1, tmpBasePath,
fmt.Sprintf("PullRequest.Merge (git merge): %s", tmpBasePath),
"git", "commit", fmt.Sprintf("--author='%s <%s>'", sig.Name, sig.Email),
"-m", fmt.Sprintf("Merge branch '%s' of %s/%s into %s", pr.HeadBranch, pr.HeadUserName, pr.HeadRepo.Name, pr.BaseBranch)); err != nil {
return fmt.Errorf("git commit [%s]: %v - %s", tmpBasePath, err, 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)
}
if err = sess.Commit(); err != nil {
return fmt.Errorf("Commit: %v", err)
}
// Compose commit repository action
l, err := headGitRepo.CommitsBetweenIDs(pr.MergedCommitID, pr.MergeBase)
if err != nil {
return fmt.Errorf("CommitsBetween: %v", err)
}
p := &api.PushPayload{
Ref: "refs/heads/" + pr.BaseBranch,
Before: pr.MergeBase,
After: pr.MergedCommitID,
CompareUrl: setting.AppUrl + pr.BaseRepo.ComposeCompareURL(pr.MergeBase, pr.MergedCommitID),
Commits: ListToPushCommits(l).ToApiPayloadCommits(pr.BaseRepo.FullRepoLink()),
Repo: pr.BaseRepo.ComposePayload(),
Pusher: &api.PayloadAuthor{
Name: pr.HeadRepo.MustOwner().DisplayName(),
Email: pr.HeadRepo.MustOwner().Email,
UserName: pr.HeadRepo.MustOwner().Name,
},
Sender: &api.PayloadUser{
UserName: doer.Name,
ID: doer.Id,
AvatarUrl: setting.AppUrl + doer.RelAvatarLink(),
},
}
if err = PrepareWebhooks(pr.BaseRepo, HOOK_EVENT_PUSH, p); err != nil {
return fmt.Errorf("PrepareWebhooks: %v", err)
}
go HookQueue.Add(pr.BaseRepo.ID)
return nil
}
// patchConflicts is a list of conflit description from Git.
var patchConflicts = []string{
"patch does not apply",
"already exists in working directory",
"unrecognized input",
}
// testPatch checks if patch can be merged to base repository without conflit.
// FIXME: make a mechanism to clean up stable local copies.
func (pr *PullRequest) testPatch() (err error) {
if pr.BaseRepo == nil {
pr.BaseRepo, err = GetRepositoryByID(pr.BaseRepoID)
if err != nil {
return fmt.Errorf("GetRepositoryByID: %v", err)
}
}
patchPath, err := pr.BaseRepo.PatchPath(pr.Index)
if err != nil {
return fmt.Errorf("BaseRepo.PatchPath: %v", err)
}
// Fast fail if patch does not exist, this assumes data is cruppted.
if !com.IsFile(patchPath) {
log.Trace("PullRequest[%d].testPatch: ignored cruppted data", pr.ID)
return nil
}
log.Trace("PullRequest[%d].testPatch(patchPath): %s", pr.ID, patchPath)
if err := pr.BaseRepo.UpdateLocalCopy(); err != nil {
return fmt.Errorf("UpdateLocalCopy: %v", err)
}
// Checkout base branch.
_, stderr, err := process.ExecDir(-1, pr.BaseRepo.LocalCopyPath(),
fmt.Sprintf("PullRequest.Merge(git checkout): %v", pr.BaseRepo.ID),
"git", "checkout", pr.BaseBranch)
if err != nil {
return fmt.Errorf("git checkout: %s", stderr)
}
pr.Status = PULL_REQUEST_STATUS_CHECKING
_, stderr, err = process.ExecDir(-1, pr.BaseRepo.LocalCopyPath(),
fmt.Sprintf("testPatch(git apply --check): %d", pr.BaseRepo.ID),
"git", "apply", "--check", patchPath)
if err != nil {
for i := range patchConflicts {
if strings.Contains(stderr, patchConflicts[i]) {
log.Trace("PullRequest[%d].testPatch(apply): has conflit", pr.ID)
fmt.Println(stderr)
pr.Status = PULL_REQUEST_STATUS_CONFLICT
return nil
}
}
return fmt.Errorf("git apply --check: %v - %s", err, stderr)
}
return nil
}
// NewPullRequest creates new pull request with labels for repository.
func NewPullRequest(repo *Repository, pull *Issue, labelIDs []int64, uuids []string, pr *PullRequest, patch []byte) (err error) {
sess := x.NewSession()
defer sessionRelease(sess)
if err = sess.Begin(); err != nil {
return err
}
if err = newIssue(sess, repo, pull, labelIDs, uuids, true); err != nil {
return fmt.Errorf("newIssue: %v", err)
}
// Notify watchers.
act := &Action{
ActUserID: pull.Poster.Id,
ActUserName: pull.Poster.Name,
ActEmail: pull.Poster.Email,
OpType: CREATE_PULL_REQUEST,
Content: fmt.Sprintf("%d|%s", pull.Index, pull.Name),
RepoID: repo.ID,
RepoUserName: repo.Owner.Name,
RepoName: repo.Name,
IsPrivate: repo.IsPrivate,
}
if err = notifyWatchers(sess, act); err != nil {
return err
}
pr.Index = pull.Index
if err = repo.SavePatch(pr.Index, patch); err != nil {
return fmt.Errorf("SavePatch: %v", err)
}
pr.BaseRepo = repo
if err = pr.testPatch(); err != nil {
return fmt.Errorf("testPatch: %v", err)
}
if pr.Status == PULL_REQUEST_STATUS_CHECKING {
pr.Status = PULL_REQUEST_STATUS_MERGEABLE
}
pr.IssueID = pull.ID
if _, err = sess.Insert(pr); err != nil {
return fmt.Errorf("insert pull repo: %v", err)
}
return sess.Commit()
}
// GetUnmergedPullRequest returnss a pull request that is open and has not been merged
// by given head/base and repo/branch.
func GetUnmergedPullRequest(headRepoID, baseRepoID int64, headBranch, baseBranch string) (*PullRequest, error) {
pr := new(PullRequest)
has, err := x.Where("head_repo_id=? AND head_branch=? AND base_repo_id=? AND base_branch=? AND has_merged=? AND issue.is_closed=?",
headRepoID, headBranch, baseRepoID, baseBranch, false, false).
Join("INNER", "issue", "issue.id=pull_request.issue_id").Get(pr)
if err != nil {
return nil, err
} else if !has {
return nil, ErrPullRequestNotExist{0, 0, headRepoID, baseRepoID, headBranch, baseBranch}
}
return pr, nil
}
// GetUnmergedPullRequestsByHeadInfo returnss all pull requests that are open and has not been merged
// by given head information (repo and branch).
func GetUnmergedPullRequestsByHeadInfo(repoID int64, branch string) ([]*PullRequest, error) {
prs := make([]*PullRequest, 0, 2)
return prs, x.Where("head_repo_id=? AND head_branch=? AND has_merged=? AND issue.is_closed=?",
repoID, branch, false, false).
Join("INNER", "issue", "issue.id=pull_request.issue_id").Find(&prs)
}
// GetUnmergedPullRequestsByBaseInfo returnss all pull requests that are open and has not been merged
// by given base information (repo and branch).
func GetUnmergedPullRequestsByBaseInfo(repoID int64, branch string) ([]*PullRequest, error) {
prs := make([]*PullRequest, 0, 2)
return prs, x.Where("base_repo_id=? AND base_branch=? AND has_merged=? AND issue.is_closed=?",
repoID, branch, false, false).
Join("INNER", "issue", "issue.id=pull_request.issue_id").Find(&prs)
}
// GetPullRequestByID returns a pull request by given ID.
func GetPullRequestByID(id int64) (*PullRequest, error) {
pr := new(PullRequest)
has, err := x.Id(id).Get(pr)
if err != nil {
return nil, err
} else if !has {
return nil, ErrPullRequestNotExist{id, 0, 0, 0, "", ""}
}
return pr, nil
}
// GetPullRequestByIssueID returns pull request by given issue ID.
func GetPullRequestByIssueID(issueID int64) (*PullRequest, error) {
pr := &PullRequest{
IssueID: issueID,
}
has, err := x.Get(pr)
if err != nil {
return nil, err
} else if !has {
return nil, ErrPullRequestNotExist{0, issueID, 0, 0, "", ""}
}
return pr, nil
}
// Update updates all fields of pull request.
func (pr *PullRequest) Update() error {
_, err := x.Id(pr.ID).AllCols().Update(pr)
return err
}
// Update updates specific fields of pull request.
func (pr *PullRequest) UpdateCols(cols ...string) error {
_, err := x.Id(pr.ID).Cols(cols...).Update(pr)
return err
}
var PullRequestQueue = NewUniqueQueue(setting.Repository.PullRequestQueueLength)
// 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)
}
headGitRepo, err := git.OpenRepository(pr.HeadRepo.RepoPath())
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.MustOwner().Name, pr.BaseRepo.Name), true); 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
}
// AddToTaskQueue adds itself to pull request test task queue.
func (pr *PullRequest) AddToTaskQueue() {
go PullRequestQueue.AddFunc(pr.ID, func() {
pr.Status = PULL_REQUEST_STATUS_CHECKING
if err := pr.UpdateCols("status"); err != nil {
log.Error(5, "AddToTaskQueue.UpdateCols[%d].(add to queue): %v", pr.ID, err)
}
})
}
func addHeadRepoTasks(prs []*PullRequest) {
for _, pr := range prs {
log.Trace("addHeadRepoTasks[%d]: composing new test task", pr.ID)
if err := pr.UpdatePatch(); err != nil {
log.Error(4, "UpdatePatch: %v", err)
continue
}
pr.AddToTaskQueue()
}
}
// AddTestPullRequestTask adds new test tasks by given head/base repository and head/base branch,
// and generate new patch for testing as needed.
func AddTestPullRequestTask(repoID int64, branch string) {
log.Trace("AddTestPullRequestTask[head_repo_id: %d, head_branch: %s]: finding pull requests", repoID, branch)
prs, err := GetUnmergedPullRequestsByHeadInfo(repoID, branch)
if err != nil {
log.Error(4, "Find pull requests[head_repo_id: %d, head_branch: %s]: %v", repoID, branch, err)
return
}
addHeadRepoTasks(prs)
log.Trace("AddTestPullRequestTask[base_repo_id: %d, base_branch: %s]: finding pull requests", repoID, branch)
prs, err = GetUnmergedPullRequestsByBaseInfo(repoID, branch)
if err != nil {
log.Error(4, "Find pull requests[base_repo_id: %d, base_branch: %s]: %v", repoID, branch, err)
return
}
for _, pr := range prs {
pr.AddToTaskQueue()
}
}
// checkAndUpdateStatus checks if pull request is possible to levaing checking status,
// and set to be either conflict or mergeable.
func (pr *PullRequest) checkAndUpdateStatus() {
// Status is not changed to conflict means mergeable.
if pr.Status == PULL_REQUEST_STATUS_CHECKING {
pr.Status = PULL_REQUEST_STATUS_MERGEABLE
}
// Make sure there is no waiting test to process before levaing the checking status.
if !PullRequestQueue.Exist(pr.ID) {
if err := pr.UpdateCols("status"); err != nil {
log.Error(4, "Update[%d]: %v", pr.ID, err)
}
}
}
// TestPullRequests checks and tests untested patches of pull requests.
// TODO: test more pull requests at same time.
func TestPullRequests() {
prs := make([]*PullRequest, 0, 10)
x.Iterate(PullRequest{
Status: PULL_REQUEST_STATUS_CHECKING,
},
func(idx int, bean interface{}) error {
pr := bean.(*PullRequest)
if err := pr.GetBaseRepo(); err != nil {
log.Error(3, "GetBaseRepo: %v", err)
return nil
}
if err := pr.testPatch(); err != nil {
log.Error(3, "testPatch: %v", err)
return nil
}
prs = append(prs, pr)
return nil
})
// Update pull request status.
for _, pr := range prs {
pr.checkAndUpdateStatus()
}
// Start listening on new test requests.
for prID := range PullRequestQueue.Queue() {
log.Trace("TestPullRequests[%v]: processing test task", prID)
PullRequestQueue.Remove(prID)
pr, err := GetPullRequestByID(com.StrTo(prID).MustInt64())
if err != nil {
log.Error(4, "GetPullRequestByID[%d]: %v", prID, err)
continue
} else if err = pr.testPatch(); err != nil {
log.Error(4, "testPatch[%d]: %v", pr.ID, err)
continue
}
pr.checkAndUpdateStatus()
}
}
func InitTestPullRequests() {
go TestPullRequests()
}