A fork of Gitea (see branch `mj`) adding Majority Judgment Polls 𐄷 over Issues and Merge Requests. https://git.mieuxvoter.fr
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// 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 pull
import (
"bufio"
"bytes"
"context"
"fmt"
"strings"
"time"
"code.gitea.io/gitea/models"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/notification"
"code.gitea.io/gitea/modules/setting"
issue_service "code.gitea.io/gitea/services/issue"
jsoniter "github.com/json-iterator/go"
)
// NewPullRequest creates new pull request with labels for repository.
func NewPullRequest(repo *models.Repository, pull *models.Issue, labelIDs []int64, uuids []string, pr *models.PullRequest, assigneeIDs []int64) error {
if err := TestPatch(pr); err != nil {
return err
}
divergence, err := GetDiverging(pr)
if err != nil {
return err
}
pr.CommitsAhead = divergence.Ahead
pr.CommitsBehind = divergence.Behind
if err := models.NewPullRequest(repo, pull, labelIDs, uuids, pr); err != nil {
return err
}
for _, assigneeID := range assigneeIDs {
if err := issue_service.AddAssigneeIfNotAssigned(pull, pull.Poster, assigneeID); err != nil {
return err
}
}
pr.Issue = pull
pull.PullRequest = pr
if err := PushToBaseRepo(pr); err != nil {
return err
}
mentions, err := pull.FindAndUpdateIssueMentions(models.DefaultDBContext(), pull.Poster, pull.Content)
if err != nil {
return err
}
notification.NotifyNewPullRequest(pr, mentions)
if len(pull.Labels) > 0 {
notification.NotifyIssueChangeLabels(pull.Poster, pull, pull.Labels, nil)
}
if pull.Milestone != nil {
notification.NotifyIssueChangeMilestone(pull.Poster, pull, 0)
}
// add first push codes comment
baseGitRepo, err := git.OpenRepository(pr.BaseRepo.RepoPath())
if err != nil {
return err
}
defer baseGitRepo.Close()
compareInfo, err := baseGitRepo.GetCompareInfo(pr.BaseRepo.RepoPath(),
git.BranchPrefix+pr.BaseBranch, pr.GetGitRefName())
if err != nil {
return err
}
if compareInfo.Commits.Len() > 0 {
data := models.PushActionContent{IsForcePush: false}
data.CommitIDs = make([]string, 0, compareInfo.Commits.Len())
for e := compareInfo.Commits.Back(); e != nil; e = e.Prev() {
data.CommitIDs = append(data.CommitIDs, e.Value.(*git.Commit).ID.String())
}
json := jsoniter.ConfigCompatibleWithStandardLibrary
dataJSON, err := json.Marshal(data)
if err != nil {
return err
}
ops := &models.CreateCommentOptions{
Type: models.CommentTypePullPush,
Doer: pull.Poster,
Repo: repo,
Issue: pr.Issue,
IsForcePush: false,
Content: string(dataJSON),
}
_, _ = models.CreateComment(ops)
}
return nil
}
// ChangeTargetBranch changes the target branch of this pull request, as the given user.
func ChangeTargetBranch(pr *models.PullRequest, doer *models.User, targetBranch string) (err error) {
// Current target branch is already the same
if pr.BaseBranch == targetBranch {
return nil
}
if pr.Issue.IsClosed {
return models.ErrIssueIsClosed{
ID: pr.Issue.ID,
RepoID: pr.Issue.RepoID,
Index: pr.Issue.Index,
}
}
if pr.HasMerged {
return models.ErrPullRequestHasMerged{
ID: pr.ID,
IssueID: pr.Index,
HeadRepoID: pr.HeadRepoID,
BaseRepoID: pr.BaseRepoID,
HeadBranch: pr.HeadBranch,
BaseBranch: pr.BaseBranch,
}
}
// Check if branches are equal
branchesEqual, err := IsHeadEqualWithBranch(pr, targetBranch)
if err != nil {
return err
}
if branchesEqual {
return models.ErrBranchesEqual{
HeadBranchName: pr.HeadBranch,
BaseBranchName: targetBranch,
}
}
// Check if pull request for the new target branch already exists
existingPr, err := models.GetUnmergedPullRequest(pr.HeadRepoID, pr.BaseRepoID, pr.HeadBranch, targetBranch)
if existingPr != nil {
return models.ErrPullRequestAlreadyExists{
ID: existingPr.ID,
IssueID: existingPr.Index,
HeadRepoID: existingPr.HeadRepoID,
BaseRepoID: existingPr.BaseRepoID,
HeadBranch: existingPr.HeadBranch,
BaseBranch: existingPr.BaseBranch,
}
}
if err != nil && !models.IsErrPullRequestNotExist(err) {
return err
}
// Set new target branch
oldBranch := pr.BaseBranch
pr.BaseBranch = targetBranch
// Refresh patch
if err := TestPatch(pr); err != nil {
return err
}
// Update target branch, PR diff and status
// This is the same as checkAndUpdateStatus in check service, but also updates base_branch
if pr.Status == models.PullRequestStatusChecking {
pr.Status = models.PullRequestStatusMergeable
}
// Update Commit Divergence
divergence, err := GetDiverging(pr)
if err != nil {
return err
}
pr.CommitsAhead = divergence.Ahead
pr.CommitsBehind = divergence.Behind
if err := pr.UpdateColsIfNotMerged("merge_base", "status", "conflicted_files", "changed_protected_files", "base_branch", "commits_ahead", "commits_behind"); err != nil {
return err
}
// Create comment
options := &models.CreateCommentOptions{
Type: models.CommentTypeChangeTargetBranch,
Doer: doer,
Repo: pr.Issue.Repo,
Issue: pr.Issue,
OldRef: oldBranch,
NewRef: targetBranch,
}
if _, err = models.CreateComment(options); err != nil {
return fmt.Errorf("CreateChangeTargetBranchComment: %v", err)
}
return nil
}
func checkForInvalidation(requests models.PullRequestList, repoID int64, doer *models.User, branch string) error {
repo, err := models.GetRepositoryByID(repoID)
if err != nil {
return fmt.Errorf("GetRepositoryByID: %v", err)
}
gitRepo, err := git.OpenRepository(repo.RepoPath())
if err != nil {
return fmt.Errorf("git.OpenRepository: %v", err)
}
go func() {
// FIXME: graceful: We need to tell the manager we're doing something...
err := requests.InvalidateCodeComments(doer, gitRepo, branch)
if err != nil {
log.Error("PullRequestList.InvalidateCodeComments: %v", err)
}
gitRepo.Close()
}()
return nil
}
// AddTestPullRequestTask adds new test tasks by given head/base repository and head/base branch,
// and generate new patch for testing as needed.
func AddTestPullRequestTask(doer *models.User, repoID int64, branch string, isSync bool, oldCommitID, newCommitID string) {
log.Trace("AddTestPullRequestTask [head_repo_id: %d, head_branch: %s]: finding pull requests", repoID, branch)
graceful.GetManager().RunWithShutdownContext(func(ctx context.Context) {
// There is no sensible way to shut this down ":-("
// If you don't let it run all the way then you will lose data
// FIXME: graceful: AddTestPullRequestTask needs to become a queue!
prs, err := models.GetUnmergedPullRequestsByHeadInfo(repoID, branch)
if err != nil {
log.Error("Find pull requests [head_repo_id: %d, head_branch: %s]: %v", repoID, branch, err)
return
}
if isSync {
requests := models.PullRequestList(prs)
if err = requests.LoadAttributes(); err != nil {
log.Error("PullRequestList.LoadAttributes: %v", err)
}
if invalidationErr := checkForInvalidation(requests, repoID, doer, branch); invalidationErr != nil {
log.Error("checkForInvalidation: %v", invalidationErr)
}
if err == nil {
for _, pr := range prs {
if newCommitID != "" && newCommitID != git.EmptySHA {
changed, err := checkIfPRContentChanged(pr, oldCommitID, newCommitID)
if err != nil {
log.Error("checkIfPRContentChanged: %v", err)
}
if changed {
// Mark old reviews as stale if diff to mergebase has changed
if err := models.MarkReviewsAsStale(pr.IssueID); err != nil {
log.Error("MarkReviewsAsStale: %v", err)
}
}
if err := models.MarkReviewsAsNotStale(pr.IssueID, newCommitID); err != nil {
log.Error("MarkReviewsAsNotStale: %v", err)
}
divergence, err := GetDiverging(pr)
if err != nil {
log.Error("GetDiverging: %v", err)
} else {
err = pr.UpdateCommitDivergence(divergence.Ahead, divergence.Behind)
if err != nil {
log.Error("UpdateCommitDivergence: %v", err)
}
}
}
pr.Issue.PullRequest = pr
notification.NotifyPullRequestSynchronized(doer, pr)
}
}
}
for _, pr := range prs {
log.Trace("Updating PR[%d]: composing new test task", pr.ID)
if err := PushToBaseRepo(pr); err != nil {
log.Error("PushToBaseRepo: %v", err)
continue
}
AddToTaskQueue(pr)
comment, err := models.CreatePushPullComment(doer, pr, oldCommitID, newCommitID)
if err == nil && comment != nil {
notification.NotifyPullRequestPushCommits(doer, pr, comment)
}
}
log.Trace("AddTestPullRequestTask [base_repo_id: %d, base_branch: %s]: finding pull requests", repoID, branch)
prs, err = models.GetUnmergedPullRequestsByBaseInfo(repoID, branch)
if err != nil {
log.Error("Find pull requests [base_repo_id: %d, base_branch: %s]: %v", repoID, branch, err)
return
}
for _, pr := range prs {
divergence, err := GetDiverging(pr)
if err != nil {
log.Error("GetDiverging: %v", err)
} else {
err = pr.UpdateCommitDivergence(divergence.Ahead, divergence.Behind)
if err != nil {
log.Error("UpdateCommitDivergence: %v", err)
}
}
AddToTaskQueue(pr)
}
})
}
// checkIfPRContentChanged checks if diff to target branch has changed by push
// A commit can be considered to leave the PR untouched if the patch/diff with its merge base is unchanged
func checkIfPRContentChanged(pr *models.PullRequest, oldCommitID, newCommitID string) (hasChanged bool, err error) {
if err = pr.LoadHeadRepo(); err != nil {
return false, fmt.Errorf("LoadHeadRepo: %v", err)
} else if pr.HeadRepo == nil {
// corrupt data assumed changed
return true, nil
}
if err = pr.LoadBaseRepo(); err != nil {
return false, fmt.Errorf("LoadBaseRepo: %v", err)
}
headGitRepo, err := git.OpenRepository(pr.HeadRepo.RepoPath())
if err != nil {
return false, fmt.Errorf("OpenRepository: %v", err)
}
defer headGitRepo.Close()
// Add a temporary remote.
tmpRemote := "checkIfPRContentChanged-" + fmt.Sprint(time.Now().UnixNano())
if err = headGitRepo.AddRemote(tmpRemote, pr.BaseRepo.RepoPath(), true); err != nil {
return false, fmt.Errorf("AddRemote: %s/%s-%s: %v", pr.HeadRepo.OwnerName, pr.HeadRepo.Name, tmpRemote, err)
}
defer func() {
if err := headGitRepo.RemoveRemote(tmpRemote); err != nil {
log.Error("checkIfPRContentChanged: RemoveRemote: %s/%s-%s: %v", pr.HeadRepo.OwnerName, pr.HeadRepo.Name, tmpRemote, err)
}
}()
// To synchronize repo and get a base ref
_, base, err := headGitRepo.GetMergeBase(tmpRemote, pr.BaseBranch, pr.HeadBranch)
if err != nil {
return false, fmt.Errorf("GetMergeBase: %v", err)
}
diffBefore := &bytes.Buffer{}
diffAfter := &bytes.Buffer{}
if err := headGitRepo.GetDiffFromMergeBase(base, oldCommitID, diffBefore); err != nil {
// If old commit not found, assume changed.
log.Debug("GetDiffFromMergeBase: %v", err)
return true, nil
}
if err := headGitRepo.GetDiffFromMergeBase(base, newCommitID, diffAfter); err != nil {
// New commit should be found
return false, fmt.Errorf("GetDiffFromMergeBase: %v", err)
}
diffBeforeLines := bufio.NewScanner(diffBefore)
diffAfterLines := bufio.NewScanner(diffAfter)
for diffBeforeLines.Scan() && diffAfterLines.Scan() {
if strings.HasPrefix(diffBeforeLines.Text(), "index") && strings.HasPrefix(diffAfterLines.Text(), "index") {
// file hashes can change without the diff changing
continue
} else if strings.HasPrefix(diffBeforeLines.Text(), "@@") && strings.HasPrefix(diffAfterLines.Text(), "@@") {
// the location of the difference may change
continue
} else if !bytes.Equal(diffBeforeLines.Bytes(), diffAfterLines.Bytes()) {
return true, nil
}
}
if diffBeforeLines.Scan() || diffAfterLines.Scan() {
// Diffs not of equal length
return true, nil
}
return false, nil
}
// PushToBaseRepo pushes commits from branches of head repository to
// corresponding branches of base repository.
// FIXME: Only push branches that are actually updates?
func PushToBaseRepo(pr *models.PullRequest) (err error) {
log.Trace("PushToBaseRepo[%d]: pushing commits to base repo '%s'", pr.BaseRepoID, pr.GetGitRefName())
if err := pr.LoadHeadRepo(); err != nil {
log.Error("Unable to load head repository for PR[%d] Error: %v", pr.ID, err)
return err
}
headRepoPath := pr.HeadRepo.RepoPath()
if err := pr.LoadBaseRepo(); err != nil {
log.Error("Unable to load base repository for PR[%d] Error: %v", pr.ID, err)
return err
}
baseRepoPath := pr.BaseRepo.RepoPath()
if err = pr.LoadIssue(); err != nil {
return fmt.Errorf("unable to load issue %d for pr %d: %v", pr.IssueID, pr.ID, err)
}
if err = pr.Issue.LoadPoster(); err != nil {
return fmt.Errorf("unable to load poster %d for pr %d: %v", pr.Issue.PosterID, pr.ID, err)
}
gitRefName := pr.GetGitRefName()
if err := git.Push(headRepoPath, git.PushOptions{
Remote: baseRepoPath,
Branch: pr.HeadBranch + ":" + gitRefName,
Force: true,
// Use InternalPushingEnvironment here because we know that pre-receive and post-receive do not run on a refs/pulls/...
Env: models.InternalPushingEnvironment(pr.Issue.Poster, pr.BaseRepo),
}); err != nil {
if git.IsErrPushOutOfDate(err) {
// This should not happen as we're using force!
log.Error("Unable to push PR head for %s#%d (%-v:%s) due to ErrPushOfDate: %v", pr.BaseRepo.FullName(), pr.Index, pr.BaseRepo, gitRefName, err)
return err
} else if git.IsErrPushRejected(err) {
rejectErr := err.(*git.ErrPushRejected)
log.Info("Unable to push PR head for %s#%d (%-v:%s) due to rejection:\nStdout: %s\nStderr: %s\nError: %v", pr.BaseRepo.FullName(), pr.Index, pr.BaseRepo, gitRefName, rejectErr.StdOut, rejectErr.StdErr, rejectErr.Err)
return err
}
log.Error("Unable to push PR head for %s#%d (%-v:%s) due to Error: %v", pr.BaseRepo.FullName(), pr.Index, pr.BaseRepo, gitRefName, err)
return fmt.Errorf("Push: %s:%s %s:%s %v", pr.HeadRepo.FullName(), pr.HeadBranch, pr.BaseRepo.FullName(), gitRefName, err)
}
return nil
}
type errlist []error
func (errs errlist) Error() string {
if len(errs) > 0 {
var buf strings.Builder
for i, err := range errs {
if i > 0 {
buf.WriteString(", ")
}
buf.WriteString(err.Error())
}
return buf.String()
}
return ""
}
// CloseBranchPulls close all the pull requests who's head branch is the branch
func CloseBranchPulls(doer *models.User, repoID int64, branch string) error {
prs, err := models.GetUnmergedPullRequestsByHeadInfo(repoID, branch)
if err != nil {
return err
}
prs2, err := models.GetUnmergedPullRequestsByBaseInfo(repoID, branch)
if err != nil {
return err
}
prs = append(prs, prs2...)
if err := models.PullRequestList(prs).LoadAttributes(); err != nil {
return err
}
var errs errlist
for _, pr := range prs {
if err = issue_service.ChangeStatus(pr.Issue, doer, true); err != nil && !models.IsErrPullWasClosed(err) {
errs = append(errs, err)
}
}
if len(errs) > 0 {
return errs
}
return nil
}
// CloseRepoBranchesPulls close all pull requests which head branches are in the given repository, but only whose base repo is not in the given repository
func CloseRepoBranchesPulls(doer *models.User, repo *models.Repository) error {
branches, _, err := git.GetBranchesByPath(repo.RepoPath(), 0, 0)
if err != nil {
return err
}
var errs errlist
for _, branch := range branches {
prs, err := models.GetUnmergedPullRequestsByHeadInfo(repo.ID, branch.Name)
if err != nil {
return err
}
if err = models.PullRequestList(prs).LoadAttributes(); err != nil {
return err
}
for _, pr := range prs {
// If the base repository for this pr is this repository there is no need to close it
// as it is going to be deleted anyway
if pr.BaseRepoID == repo.ID {
continue
}
if err = issue_service.ChangeStatus(pr.Issue, doer, true); err != nil && !models.IsErrPullWasClosed(err) {
errs = append(errs, err)
}
}
}
if len(errs) > 0 {
return errs
}
return nil
}
// GetSquashMergeCommitMessages returns the commit messages between head and merge base (if there is one)
func GetSquashMergeCommitMessages(pr *models.PullRequest) string {
if err := pr.LoadIssue(); err != nil {
log.Error("Cannot load issue %d for PR id %d: Error: %v", pr.IssueID, pr.ID, err)
return ""
}
if err := pr.Issue.LoadPoster(); err != nil {
log.Error("Cannot load poster %d for pr id %d, index %d Error: %v", pr.Issue.PosterID, pr.ID, pr.Index, err)
return ""
}
if pr.HeadRepo == nil {
var err error
pr.HeadRepo, err = models.GetRepositoryByID(pr.HeadRepoID)
if err != nil {
log.Error("GetRepositoryById[%d]: %v", pr.HeadRepoID, err)
return ""
}
}
gitRepo, err := git.OpenRepository(pr.HeadRepo.RepoPath())
if err != nil {
log.Error("Unable to open head repository: Error: %v", err)
return ""
}
defer gitRepo.Close()
headCommit, err := gitRepo.GetBranchCommit(pr.HeadBranch)
if err != nil {
log.Error("Unable to get head commit: %s Error: %v", pr.HeadBranch, err)
return ""
}
mergeBase, err := gitRepo.GetCommit(pr.MergeBase)
if err != nil {
log.Error("Unable to get merge base commit: %s Error: %v", pr.MergeBase, err)
return ""
}
limit := setting.Repository.PullRequest.DefaultMergeMessageCommitsLimit
list, err := gitRepo.CommitsBetweenLimit(headCommit, mergeBase, limit, 0)
if err != nil {
log.Error("Unable to get commits between: %s %s Error: %v", pr.HeadBranch, pr.MergeBase, err)
return ""
}
posterSig := pr.Issue.Poster.NewGitSig().String()
authorsMap := map[string]bool{}
authors := make([]string, 0, list.Len())
stringBuilder := strings.Builder{}
stringBuilder.WriteString(pr.Issue.Content)
if stringBuilder.Len() > 0 {
stringBuilder.WriteRune('\n')
stringBuilder.WriteRune('\n')
}
// commits list is in reverse chronological order
element := list.Back()
for element != nil {
commit := element.Value.(*git.Commit)
authorString := commit.Author.String()
if !authorsMap[authorString] && authorString != posterSig {
authors = append(authors, authorString)
authorsMap[authorString] = true
}
element = element.Prev()
}
// Consider collecting the remaining authors
if limit >= 0 && setting.Repository.PullRequest.DefaultMergeMessageAllAuthors {
skip := limit
limit = 30
for {
list, err := gitRepo.CommitsBetweenLimit(headCommit, mergeBase, limit, skip)
if err != nil {
log.Error("Unable to get commits between: %s %s Error: %v", pr.HeadBranch, pr.MergeBase, err)
return ""
}
if list.Len() == 0 {
break
}
element := list.Front()
for element != nil {
commit := element.Value.(*git.Commit)
authorString := commit.Author.String()
if !authorsMap[authorString] && authorString != posterSig {
authors = append(authors, authorString)
authorsMap[authorString] = true
}
element = element.Next()
}
skip += limit
}
}
if len(authors) > 0 {
if _, err := stringBuilder.WriteRune('\n'); err != nil {
log.Error("Unable to write to string builder Error: %v", err)
return ""
}
}
for _, author := range authors {
if _, err := stringBuilder.Write([]byte("Co-authored-by: ")); err != nil {
log.Error("Unable to write to string builder Error: %v", err)
return ""
}
if _, err := stringBuilder.Write([]byte(author)); err != nil {
log.Error("Unable to write to string builder Error: %v", err)
return ""
}
if _, err := stringBuilder.WriteRune('\n'); err != nil {
log.Error("Unable to write to string builder Error: %v", err)
return ""
}
}
return stringBuilder.String()
}
// GetIssuesLastCommitStatus returns a map
func GetIssuesLastCommitStatus(issues models.IssueList) (map[int64]*models.CommitStatus, error) {
if err := issues.LoadPullRequests(); err != nil {
return nil, err
}
if _, err := issues.LoadRepositories(); err != nil {
return nil, err
}
var (
gitRepos = make(map[int64]*git.Repository)
res = make(map[int64]*models.CommitStatus)
err error
)
defer func() {
for _, gitRepo := range gitRepos {
gitRepo.Close()
}
}()
for _, issue := range issues {
if !issue.IsPull {
continue
}
gitRepo, ok := gitRepos[issue.RepoID]
if !ok {
gitRepo, err = git.OpenRepository(issue.Repo.RepoPath())
if err != nil {
return nil, err
}
gitRepos[issue.RepoID] = gitRepo
}
status, err := getLastCommitStatus(gitRepo, issue.PullRequest)
if err != nil {
return nil, err
}
res[issue.PullRequest.ID] = status
}
return res, nil
}
// GetLastCommitStatus returns list of commit statuses for latest commit on this pull request.
func GetLastCommitStatus(pr *models.PullRequest) (status *models.CommitStatus, err error) {
if err = pr.LoadBaseRepo(); err != nil {
return nil, err
}
gitRepo, err := git.OpenRepository(pr.BaseRepo.RepoPath())
if err != nil {
return nil, err
}
defer gitRepo.Close()
return getLastCommitStatus(gitRepo, pr)
}
// getLastCommitStatus get pr's last commit status. PR's last commit status is the head commit id's last commit status
func getLastCommitStatus(gitRepo *git.Repository, pr *models.PullRequest) (status *models.CommitStatus, err error) {
sha, err := gitRepo.GetRefCommitID(pr.GetGitRefName())
if err != nil {
return nil, err
}
statusList, err := models.GetLatestCommitStatus(pr.BaseRepo.ID, sha, models.ListOptions{})
if err != nil {
return nil, err
}
return models.CalcCommitStatus(statusList), nil
}
// IsHeadEqualWithBranch returns if the commits of branchName are available in pull request head
func IsHeadEqualWithBranch(pr *models.PullRequest, branchName string) (bool, error) {
var err error
if err = pr.LoadBaseRepo(); err != nil {
return false, err
}
baseGitRepo, err := git.OpenRepository(pr.BaseRepo.RepoPath())
if err != nil {
return false, err
}
defer baseGitRepo.Close()
baseCommit, err := baseGitRepo.GetBranchCommit(branchName)
if err != nil {
return false, err
}
if err = pr.LoadHeadRepo(); err != nil {
return false, err
}
headGitRepo, err := git.OpenRepository(pr.HeadRepo.RepoPath())
if err != nil {
return false, err
}
defer headGitRepo.Close()
headCommit, err := headGitRepo.GetBranchCommit(pr.HeadBranch)
if err != nil {
return false, err
}
return baseCommit.HasPreviousCommit(headCommit.ID)
}